Colson, Wendell B. (Weston, MA, US)
Miller, James L. (Thornton, CO, US)
Plaque It!
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| 0803696 | November, 1905 | Lang | ||
| 2579144 | Winding and stopping mechanism for venetian blinds | December, 1951 | Griesser | |
| 2732010 | January, 1956 | Griesser | ||
| 2758527 | Focal plane shutter brake | August, 1956 | McFadden | |
| 3135369 | Brake for window shades or blinds | June, 1964 | Nisenson et al. | |
| 3181595 | Venetian blinds | May, 1965 | Pender | |
| 4126366 | Rotatable, multiple storage bin assembly | November, 1978 | Handler et al. | |
| 4224973 | Drive mechanism, particularly for moving and turning the slats of a blind | September, 1980 | Hugin | |
| 4372432 | Bi-directional clutch | February, 1983 | Waine et al. | |
| 4433765 | Spring clutches | February, 1984 | Rude et al. | |
| 4466475 | Device for driving and stopping a roll blind | August, 1984 | Saito et al. | |
| 4492261 | Shading system | January, 1985 | Chong | |
| 4657060 | Vertical venetian blind with inline drive | April, 1987 | Kaucic | |
| 4662423 | Device for operating roll-screen | May, 1987 | Ishii | |
| 4681279 | Screen roll means | July, 1987 | Nakamura | |
| 4712599 | Shutter | December, 1987 | Komaki | |
| 4830081 | Curved vertical blind with slat traversing and rotation | May, 1989 | Morris | |
| 4919186 | Blind operating device and method | April, 1990 | Uecker et al. | |
| 5099906 | Roller screen unit | March, 1992 | Chigusa et al. | |
| 5137073 | Chain pulling device | August, 1992 | Huang | |
| 5266068 | Vertical blind with single-element drive | November, 1993 | Benthin | |
| 5375643 | Spring clutch assembly with reduced radial bearing forces | December, 1994 | Rude | |
| 5566741 | Roll screen apparatus | October, 1996 | Ogawara et al. | |
| 5586631 | Window shade | December, 1996 | Benthin | |
| 5634244 | Clasp for beaded chains | June, 1997 | Fetsch et al. | 24/115F |
| 5641046 | Bi-directional clutch | June, 1997 | Levenberg | |
| 5791393 | Shade operator | August, 1998 | Judkins | |
| 5803148 | Operating device for a screening arrangement | September, 1998 | Madsen | |
| 5890529 | Dual action retractable cord take-up reel | April, 1999 | Haarer | |
| 5909791 | Spring clutch | June, 1999 | DiStefano | |
| 6123140 | Spring device for rolling up a roller curtain | September, 2000 | Bergamaschi | |
| 6129131 | Control system for coverings for architectural openings | October, 2000 | Colson | 160/84.02 |
| 6148893 | Head-rail end adapter for window blinds | November, 2000 | Cadorette | |
| 6158563 | Winding mechanism | December, 2000 | Welfonder et al. | |
| 6173825 | Lift control device for a roller shade | January, 2001 | Liu | |
| 6305456 | Operating devices and slats for reversible window blinds | October, 2001 | Sanchez | |
| 6379276 | Bi-power transmission mechanism | April, 2002 | Cheng | |
| 6685592 | Roller shade clutch with internal gearing | February, 2004 | Fraczek et al. | 475/14 |
| GB955899 | April, 1964 | |||
| GB955900 | April, 1964 | |||
| JP57164973 | October, 1982 | MEDIUM-CR LOW-NI STAINLESS CAST STEEL WITH HIGH CORROSION RESISTANCE AND STRENGTH AND ITS MANUFACTURE | ||
| JP6346224 | September, 1988 | |||
| JP0059890 | March, 1993 | |||
| JP7324572 | December, 1995 | |||
| JP8232559 | September, 1996 | |||
| WO/1992/009779 | June, 1992 | DEVICE FOR WORKING VERTICALLY-OPERATED WINDOW CURTAINS WITH MULTIPLIED TRAVEL |
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to U.S. Provisional Application No. 60/452,222, filed Mar. 4, 2003, hereby incorporated by reference in its entirety as though fully set forth herein.
1. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element; a transmission operative to translate reversible rotation of said first motion transfer element into reversible rotation of a second motion transfer element; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller; and wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to drivingly rotate in said first direction, and said pull force applied in a second pull direction imparted on said single operating element causes said head roller to drivingly rotate in said second direction.
2. The covering of claim 1, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
3. The covering of claim 1, the wherein said single operating element is defined by an operating cord connected with a pull cord through a coupler; wherein said coupler is defined by a first coupler portion connected with said operating cord, and a second coupler portion connected with said pull cord; wherein said first coupler portion is releasably connected with said second coupler portion; and wherein said coupler is configured to allow separation of said first coupler portion from said second coupler portion at a predetermined tension applied to said single operating element.
4. The covering of claim 2, said transmission further comprising: a clutch selectively rotatably connecting said first gear with said second gear; and at least one third gear rotatably connecting said first gear with said second gear.
5. The covering of claim 4, wherein said pull force applied in said first pull direction to said single operating element causes said first gear to rotate in said first direction, and wherein said first gear engages said at least one third gear to cause rotation of said second gear in said second direction; and wherein said pull force applied in said second pull direction to said single operating element causes said first gear to rotate in said first direction, and wherein said first gear engages said at least one third gear to activate said clutch to cause rotation of said second gear in said first direction.
6. The covering of claim 5, wherein said clutch is configured to allow rotation of said second gear in said first direction and second direction when said clutch is deactivated.
7. The covering of claim 5, wherein said clutch comprises: a clutch body having an open center adapted to receive an axle to rotatably support said clutch; at least one leg connected with said clutch body; and wherein said at least one third gear is adapted to engage said at least one leg to activate said clutch when said at least one third gear rotates in said first direction; and wherein said at least one third gear is adapted to disengage from said at least one leg to activate said clutch when said at least one third gear rotates in said second direction.
8. The covering of claim 7, wherein a first frictional force between said clutch body and said axle prevents rotation of said body relative to said axle until said at least one third gear engages said at least one leg to activate said clutch, and wherein said first frictional force overcomes a second frictional force between said at least one third gear and said at least one leg to allow disengagement of said at least one third gear from said at least one leg.
9. The covering of claim 4, wherein said clutch is constructed from a thermoplastic polyester elastomer material.
10. The covering of claim 7, wherein said axle is constructed from a Teflon-filled polycarbonate.
11. The covering of claim 4, wherein said clutch is a step spring.
12. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element, a transmission operative to translate reversible rotation of said first motion transfer element in said first direction into reversible rotation of a second motion transfer element through at least one planet gear rotatably connected with a planet carrier, wherein said input assembly includes a braking element adapted to brake said planet carrier to cause driven rotation of said second motion transfer element in said second direction, and wherein said input assembly is adapted to release said planet carrier to cause driven rotation of said second motion transfer element in said first direction; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller.
13. The covering of claim 12, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
14. The covering of claim 13, said transmission further comprising: a clutch selectively rotatably connecting said first gear with said second gear.
15. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element; a transmission operative to translate reversible rotation of said first motion transfer element in said first direction into reversible rotation of a second motion transfer element though a planetary gear set configured to selectively operate in a first configuration and a second configuration; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller; wherein said first configuration provides a first mechanical advantage and causes said second motion transfer element to reversibly rotate at a first speed; and wherein said second configuration provides a second mechanical advantage and causes said second motion transfer element to reversibly rotate at a second speed.
16. The covering of claim 15, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
17. The covering of claim 16, said transmission further comprising: a clutch selectively rotatably connecting said first gear with said second gear.
18. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element; a transmission operative to translate reversible rotation of said first motion transfer element into reversible rotation of a second motion transfer element through a clutch and at least one third gear; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller; wherein rotation of said first motion transfer element in said first direction engages said at least one third gear to activate said clutch to cause rotation of said second motion transfer element in said first direction; and wherein said clutch is configured to allow driven rotation of said second motion transfer element in said first direction and second direction when said clutch is deactivated.
19. The covering of claim 18, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
20. The covering according to claim 18 or 19, wherein said clutch comprises: a clutch body having an open center adapted to receive an axle to rotatably support said clutch; at least one leg connected with said clutch body; and wherein said at least one third gear is adapted to engage said at least one leg to activate said clutch when said at least one third gear rotates in said first direction; and wherein said at least one third gear is adapted to disengage from said at least one leg to activate said clutch when said at least one third gear rotates in said second direction.
21. The covering of claim 20, wherein a first frictional force between said clutch body and said axle prevents rotation of said body relative to said axle until said at least one third gear engages said at least one leg to activate said clutch, and wherein said first frictional force overcomes a second frictional force between said at least one third gear and said at least one leg to allow disengagement of said at least one third gear from said at least one leg.
22. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element; a transmission operative to translate rotation of said first motion transfer element into reversible rotation of a second motion transfer element; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller; and wherein said input assembly is configured to engage said transmission to cause said head roller to drivingly rotate in said first direction when said operating element travels in a first path through said input assembly; and wherein said input assembly is configured to engage said transmission to cause said head roller to drivingly rotate in a second direction when said operating element travels in a second path through said input assembly.
23. The covering of claim 22, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
24. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to drivingly rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into reversible driven rotational motion of a first motion transfer element; a transmission operative to translate reversible rotation of said first motion transfer element into reversible rotation of a second motion transfer element; an output assembly operatively engaged with said second motion transfer element to reversibly drivingly rotate said head roller; wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to drivingly rotate in said first direction; and wherein said input assembly is operative to allow a change in direction of said pull force on said single operating element while said head roller is rotating in said first direction without reversing rotation of said head roller.
25. The covering of claim 24, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
26. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly operative to convert linear motion of an operating element into rotational motion of a first motion transfer element; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element through at least one third gear rotatably connected with a planet carrier; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said input assembly includes a shift arm having a pawl adapted to engage ratchet teeth on said planet carder when a pull force in a first pull direction is imparted on said single operating element; and wherein said input assembly is configured to automatically retract said single operating element into said head rail assembly and disengage said pawl from said ratchet teeth when no pull force is applied to said single operating element.
27. The covering of claim 26, wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
28. The covering according to claim 26 or 27, wherein said input assembly further comprises: a spool; a pulley; a guide control arm; and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm.
29. The covering of claim 28, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
30. The covering of claim 29, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while said pull force is being applied to said single operating element and while said head roller is rotating said first direction, changing direction of said pull force from said first pull direction to a second pull direction does not cause said head roller to rotate in said second direction.
31. The covering claim 27, wherein said input assembly further comprises: a spool; a guide control arm; wherein said shift arm is pivotally connected with said head rail assembly: wherein said single operating element extends from said spool, across said shift arm, and exits said head rail assembly through said guide control arm; and wherein a pull force imparted on said single operating element in a first pull direction causes said shift arm to pivot and engage said transmission, causing said head roller to rotate in said first direction.
32. The covering of claim 31, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
33. The covering of claim 27, said transmission further comprising: a clutch selectively rotatably connecting said first gear with said second gear.
34. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a pulley, a shift arm, a guide control arm, and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element, an output assembly operatively engaged with said second motion transfer element to rotate said head roller; and wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to rotate in said first direction, and said pull force applied in a second pull direction imparted on said single operating element causes said head roller to drivingly rotate in said second direction.
35. The covering according to claim 34 wherein the first motion transfer element is a first gear and the second motion transfer element is a second gear.
36. The covering of claim 34 or 35, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
37. The covering of claim 36, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while said pull force is being applied to said single operating element, changing direction of said pull force from said first pull direction to said second pull direction does not cause said head roller to rotate in said second direction.
38. The covering of claim 37, wherein a pawl extends from said first leg portion to engage said transmission.
39. The covering of claim 38, wherein a boss extends from said second leg portion to operatively engage said single operating element.
40. The covering claim 35, wherein said input assembly further comprises: a spool; a shift arm; a guide control arm; and wherein said single operating element extends from said spool, across said shift arm, and exits said head rail assembly through said guide control arm.
41. The covering of claim 40, wherein said shift arm is pivotally connected with said head rail assembly; and wherein said pull force imparted on said single operating element in said first pull direction causes said shift arm to pivot and engage said transmission, causing said head roller to rotate in said first direction.
42. The covering of claim 40, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
43. The covering of claim 42, the wherein said single operating element is defined by an operating cord connected with a pull cord through a coupler; wherein said operating cord extends from said spool, across said shift arm, and exits said head rail assembly through an opening on guide control arm; and wherein said coupler is adapted to engage said opening on said guide control to prevent said pull cord from entering said opening.
44. The covering of claim 43, wherein said opening on said guide control arm is configured to engage said coupler to place said operating cord in a first position relative to said shift arm; wherein said first position of said operating cord relative to said shift arm allows placement of said operating cord in a first cord path across said shift arm when said pull force in said first direction is imparted on said single operating element in said first pull direction; and wherein said first position of said operating cord relative to said shift arm allows placement of said operating cord in a second cord path across said shift arm when said pull force in said second direction is imparted on said single operating element in said second pull direction.
45. The covering of claim 44 wherein said operating cord engages said shift arm to allow said shift arm to engage said transmission to control a rotational direction of said second gear when said operating cord is placed in said first cord path across said shift arm.
46. The covering of claim 44, wherein said operating cord engages said shift arm to prevent said shift arm from engaging said transmission to control a rotational direction of said second gear when said operating cord is placed in said first cord path across said shift arm.
47. The covering of claim 43, wherein said coupler is defined by a first coupler portion connected with said operating cord, and a second coupler portion connected with said pull cord; wherein said first coupler portion is releasably connected with said second coupler portion; and wherein said coupler is configured to allow separation of said first coupler portion from said second coupler portion at a predetermined tension applied to said single operating element.
48. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element; said first motion transfer element being a first gear and said second transfer motion element being a second gear, a clutch selectively rotatably connecting said first gear with said second gear; and at least one third gear rotatably connecting said first gear with said second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to rotate in said first direction, and said pull force applied in a second pull direction imparted on said single operating element causes said head roller to rotate in said second direction; wherein said at least one third gear comprises at least one planet gear adapted to engage said first gear and said second gear; wherein said planet gear is rotatably supported by a planet carrier to allow said planet gear to orbit about said axis; wherein said input assembly is adapted to engage said planet carrier to prevent rotation of said planet carrier when said pull force is applied to said single operating element in said first pull direction; and wherein said input assembly is adapted to not engage said planet carrier to allow rotation of said planet carrier when said pull force is applied to said single operating element in said second pull direction.
49. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first transfer element; said input assembly further comprising a spool, a pulley, a shift arm, a guide control arm, and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate rotation of said first motion transfer element in said first direction into rotation of a second motion transfer element through at least one planet gear rotatably connected with a planet carrier; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; and wherein said input assembly includes a braking element adapted to brake said planet carrier to cause rotation of said second motion transfer element in said second direction, and wherein said input assembly is adapted to release said planet carrier to cause rotation of said second motion transfer element in said first direction.
50. The covering according to claim 49 wherein said first motion transfer element is a first gear, and said second motion transfer element is a second gear.
51. The covering of claim 49 or 50, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
52. The covering of claim 51, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while a pull force is being applied to said single operating element and while said heed roller is rotating said first direction, changing direction of said pull force from a first pull direction to a second pull direction does not cause said head roller to rotate in said second direction.
53. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first transfer element; said input assembly further comprising a spool, a shift arm pivotally connected with said head rail assembly, a guide control arm, wherein said single operating element extends from said spool, across said shift arm, and exits said head rail assembly through said guide control arm; and wherein a pull force imparted on said single operating element in a first pull direction causes said shift arm to pivot and engage said transmission, causing said head roller to rotate in said first direction; a transmission operative to translate rotation of said first motion transfer element in said first direction into rotation of a second motion transfer element through at least one planet gear rotatably connected with a planet carrier; said first motion transfer element being a first gear and said second motion transfer element being a second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; and wherein said input assembly includes a braking element adapted to brake said planet carrier to cause rotation of said second motion transfer element in said second direction, arid wherein said input assembly is adapted to release said planet carrier to cause rotation of said second motion transfer element in said first direction.
54. The covering of claim 53, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
55. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool; a pulley; a shift arm, a guide control arm; and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate reversible rotation of said first motion transfer element in said first direction into reversible rotation of a second motion transfer element though a planetary gear set configured to selectively operate in a first configuration and a second configuration; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said first configuration provides a first mechanical advantage and causes said second motion transfer element to rotate at a first speed; and wherein said second configuration provides a second mechanical advantage and causes said second motion transfer element to rotate at a second speed.
56. The covering according to claim 55 wherein said first motion transfer element is a first gear and said second motion transfer element is a second gear.
57. The covering of claim 55 or 56, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
58. The covering of claim 57, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while a pull force is being applied to said single operating element and while said head roller is rotating said first direction, changing direction of said pull force from a first pull direction to a second pull direction does not cause said head roller to rotate in said second direction.
59. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a pulley, a shift arm, a guide control arm, and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate rotation of said first motion transfer element in said first direction into rotation of a second motion transfer element though a planetary gear set configured to selectively operate in a first configuration and a second configuration, said first motion transfer element being a first gear, and said second motion transfer element being a second gear an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said first configuration provides a first mechanical advantage and causes said second motion transfer element to rotate at a first speed; and wherein said second configuration provides a second mechanical advantage and causes said second motion transfer element to rotate at a second speed.
60. The covering of claim 59, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
61. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element; a transmission operative to translate rotation of said first motion transfer element in said first direction into rotation of a second motion transfer element though a planetary gear set configured to selectively operate in a first configuration and a second configuration; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said first configuration provides a first mechanical advantage and causes said second motion transfer element to rotate at a first speed; and wherein said second configuration provides a second mechanical advantage and causes said second motion transfer element to rotate at a second speed, said first mechanical advantage being greater than said second mechanical advantage, and wherein said first speed is less than said second speed.
62. The covering according to claim 61 wherein said first motion transfer element is a first gear and said second motion transfer element is a second gear.
63. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a pulley, a shift arm, a guide control arm, and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element through a clutch and at least one third gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein rotation of said first motion transfer element in said first direction engages said at least one third gear to activate said clutch to cause rotation of said second motion transfer element in said first direction; and wherein said clutch is configured to allow rotation of said second motion transfer element in said first direction and second direction when said clutch is deactivated.
64. The covering of claim 63 wherein said motion transfer element is a first gear and said second motion transfer element is a second gear.
65. The covering of claim 63 or 64, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
66. The covering of claim 65, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while a pull force is being applied to said single operating element and while said head roller is rotating said first direction, changing direction of said pull force from a first pull direction to a second pull direction does not cause said head roller to rotate in said second direction.
67. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a shift arm pivotally connected with said head rail assembly, a guide control arm, wherein said single operating element extends from said spool, across said shift arm, and exits said head rail assembly through said guide control arm, and wherein a pull force imparted on said single operating element in a first pull direction causes said shift arm to pivot and engage said transmission, causing said head roller to rotate in said first direction; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element through a clutch and at least one third gear; said first motion transfer element is a first gear, and said second motion transfer element being a second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein rotation of said first motion transfer element in said first direction engages said at least one third gear to activate said clutch to cause rotation of said second motion transfer element in said first direction; and wherein said clutch is configured to allow rotation of said second motion transfer element in said first direction and second direction when said clutch is deactivated.
68. The covering of claim 67, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
69. A covering for an architectural opening comprising; a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a pulley, a shift arm, a guide control arm, and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said input assembly is configured to engage said transmission to cause said head roller to rotate in said first direction when said operating element travels in a first path through said input assembly; and wherein said input assembly is configured to engage said transmission to cause said head roller to rotate in a second direction when said operating element travels in a second path through said input assembly.
70. The covering according to claim 69 wherein said first motion transfer element is a first gear and said second motion transfer element is a second gear.
71. The covering of claim 69 or 70, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
72. The covering of claim 71, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while a pull force is being applied to said single operating element and while said head roller is rotating said first direction, changing direction of said pull force from a first pull direction to a second pull direction does not cause said head roller to rotate in said second direction.
73. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a shift arm pivotally connected with said head rail assembly, a guide control arm, wherein said single operating element extends from said spool, across said shift arm, and exits said head rail assembly through said guide control arm; and wherein a pull force imparted on said single operating element in a first pull direction causes said shift arm to pivot and engage said transmission, causing said head roller to rotate in said first direction; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element, said first motion transfer element being a first gear and said second motion transfer element being a second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said input assembly is configured to engage said transmission to cause said head roller to rotate in said first direction when said operating element travels in a first path through said input assembly; and wherein said input assembly is configured to engage said transmission to cause said head roller to rotate in a second direction when said operating element travels in a second path through said input assembly.
74. The covering of claim 73, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
75. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element, said first motion transfer element being a first gear and said second transfer element being a second gear, said transmission further comprising a clutch selectively rotatably connecting said first gear with said second gear; and at least one third gear rotatably connecting said first gear with said second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein said input assembly is configured to engage said transmission to cause said head roller to rotate in said first direction when said operating element travels in a first path through said input assembly; and wherein said input assembly is configured to engage said transmission to cause said head roller to rotate in a second direction when said operating element travels in a second path through said input assembly.
76. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a pulley, a shift arm, a guide control arm, and wherein said single operating element extends from said spool, partially around said pulley, across said shift arm, and exits said head rail assembly through said guide control arm; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to rotate in said first direction; and wherein said input assembly is operative to allow a change in direction of said pull force on said single operating element while said head roller is rotating in said first direction without reversing rotation of said head roller.
77. The covering according to claim 76 wherein said first motion transfer element is a first gear and said second motion transfer element is a second gear.
78. The covering of claim 76 or 77, wherein said pulley is rotatably supported by said shift arm; and wherein friction between said pulley and said shift arm causes said shift arm to pivot when said pull force is applied to said single operating element.
79. The covering of claim 78, wherein said shift arm includes a first leg portion and a second leg portion; wherein said first leg portion is adapted to engage said transmission to control a rotational direction of said head roller; and wherein said second leg portion is adapted to operatively engage said single operating element such that while said pull force is being applied to said single operating element and while said head roller is rotating said first direction, changing direction of said pull force from said first pull direction to a second pull direction does not cause said head roller to rotate in said second direction.
80. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element, said input assembly further comprising a spool, a shift arm pivotally connected with said head rail assembly, a guide control arm, wherein said single operating element extends from said spool, across said shift arm, and exits said head rail assembly through said guide control arm, and wherein said pull force imparted on said single operating element in said first pull direction causes said shift arm to pivot and engage said transmission; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element, said first motion transfer element being a first gear and said second motion transfer element being a second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to rotate in said first direction; and wherein said input assembly is operative to allow a change in direction of said pull force on said single operating element while said head roller is rotating in said first direction without reversing rotation of said head roller.
81. The covering of claim 80, said input assembly further comprising a spring operatively connected with said spool to automatically wind said single operating element onto said spool.
82. A covering for an architectural opening comprising: a head rail assembly; at least one sheet of fabric; a head roller rotatably supported by said head rail assembly and adapted to extend or retract said at least one sheet upon rotation of said head roller in a first direction or a second direction; a control system connected with said head rail assembly and adapted to rotate said head roller in said first direction and said second direction, said control system comprising: an input assembly including a single operating element operative to convert linear motion of said operating element into rotational motion of a first motion transfer element; a transmission operative to translate rotation of said first motion transfer element into rotation of a second motion transfer element, said first motion transfer element being a first gear and said second motion transfer element being a second gear, said transmission further comprising a clutch selectively rotatably connecting said first gear with said second gear and at least one third gear rotatably connecting said first gear with said second gear; an output assembly operatively engaged with said second motion transfer element to rotate said head roller; wherein a pull force applied in a first pull direction imparted on said single operating element causes said head roller to rotate in said first direction; and wherein said input assembly is operative to allow a change in direction of said pull force on said single operating element while said head roller is rotating in said first direction without reversing rotation of said head roller.
BACKGROUND OF THE INVENTION
a. Field of the Invention
This invention relates to retractable coverings for architectural openings, and more particularly, an operating system for controlling retractable coverings for architectural openings using a single operating element.
b. Background Art
Operating systems utilized in window coverings for architectural openings, such as shade and blind assemblies are commonly used. Conventional shade and blind assemblies typically comprise a head rail, bottom rail, and slats or a covering disposed therebetween. Generally, a control system for raising and lowering such blinds or shades are installed in the head rail and may include an operating element, such as a cord, for lowering or raising the blinds or shades. The operating element is typically connected to pulleys or drums within the head rail, which when activated by a user, lift the bottom rail or lower the bottom rail via cords attached to the bottom rail. The operating element may be a continuous loop so as to present to the user a convenient method for operating the shade or blind. Other control systems may have a plurality of operating elements that are not in a loop so as to present the user a choice of one of the operating elements to raise or lower the blind.
Whether the control system utilizes a single looped type operating element or a plurality of operating elements, the operator must choose which direction to pull the loop or which operating element to activate in order to move the architectural covering in a desired direction. This can be especially confusing if the operating elements are tangled. Inherent in the loop operating element system is the problem of having a very long operating element with which to operate the system. Often, a greater length of operating element is necessary to raise or lower the shade or blind due to the longer drop of the shade or blind. A greater length of the operating element or the use of a looped cord present a strangulation hazard to children who may become entangled in the operating element.
BRIEF SUMMARY OF THE INVENTION
The present invention provides for retractable coverings for architectural openings utilizing a control system having a single operating element allowing a user to move a retractable covering for architectural openings between extended and retracted positions by imparting a repetitive motion to the operating element. When the retractable covering is vertically disposed, a user can raise or lower the retractable covering by imparting a repetitive up and down motion to the pull cord.
In one aspect of the present invention, a covering for an architectural opening includes a head rail assembly, at least one sheet of fabric, and a head roller rotatably supported by the head rail assembly and adapted to extend or retract the at least one sheet upon rotation of the head roller in a first direction or a second direction. A control system is connected with the head rail assembly and is adapted to rotate the head roller in the first direction and the second direction. The control system includes an input assembly, a transmission, and an output assembly. The input assembly includes a single operating element and is operative to convert linear motion of the operating element into rotational motion of a first motion transfer element. The transmission is operative to translate rotation of the first motion transfer element into rotation of a second motion transfer element. The output assembly is operatively engaged with the second motion transfer element to rotate the head roller. A pull force applied in a first pull direction imparted on the single operating element causes the head roller to rotate in the first direction, and the pull force applied in a second pull direction imparted on the single operating element causes the head roller to rotate in the second direction.
In another form of the present invention, the input assembly includes a single operating element and is operative to convert linear motion of the operating element into rotational motion of a first motion transfer element. The transmission is operative to translate rotation of the first motion transfer element in the first direction into rotation of a second motion transfer element through at least one planet gear rotatably connected with a planet carrier. The output assembly is operatively engaged with the second motion transfer element to rotate the head roller. The input assembly includes a braking element adapted to brake the planet carrier to cause rotation of the second motion transfer element in the second direction, and the input assembly is adapted to release the planet carrier to cause rotation of the second motion transfer element in the first direction.
In yet another form of the present invention, the input assembly includes a single operating element and is operative to convert linear motion of the operating element into rotational motion of a first motion transfer element. The transmission is operative to translate rotation of the first motion transfer element in the first direction into rotation of a second motion transfer element though a planetary gear set configured to selectively operate in a first configuration and a second configuration. The output assembly is operatively engaged with the second motion transfer element to rotate the head roller. The first configuration provides a first mechanical advantage and causes the second motion transfer element to rotate at a first speed. The second configuration provides a second mechanical advantage and causes the second motion transfer element to rotate at a second speed.
In still another form of the present invention, the input assembly includes a single operating element and is operative to convert linear motion of the operating element into rotational motion of a first motion transfer element. The transmission is operative to translate rotation of the first motion transfer element into rotation of a second motion transfer element through a clutch and at least one third gear. The output assembly operatively engaged with the second motion transfer element to rotate the head roller. Rotation of the first motion transfer element in the first direction engages the least one third gear to activate the clutch to cause rotation of the second motion transfer element in the first direction. The clutch is configured to allow rotation of the second motion transfer element in the first direction and second direction when the clutch is deactivated.
In still another form of the present invention, the input assembly includes a single operating element and is operative to convert linear motion of the operating element into rotational motion of a first motion transfer element. The transmission operative to translate rotation of the first motion transfer element into rotation of a second motion transfer element. The output assembly is operatively engaged with the second motion transfer element to rotate the head roller. The input assembly is configured to engage the transmission to cause the head roller to rotate in the first direction when the operating element travels in a first path through the input assembly, and is configured to engage the transmission to cause the head roller to rotate in a the second direction when the operating element travels in a second path through the input assembly.
In still another form of the present invention, the input assembly includes a single operating element and is operative to convert linear motion of the operating element into rotational motion of a first motion transfer element. The transmission is operative to translate rotation of the first motion transfer element into rotation of a second motion transfer element. The output assembly operatively engaged with the second motion transfer element to rotate the head roller. A pull force applied in a first pull direction imparted on the single operating element causes the head roller to rotate in the first direction. The input assembly is operative to allow a change in direction of the pull force on the single operating element while the head roller is rotating in the first direction without reversing rotation of the head roller.
In still another form of the present invention, the input assembly is operative to convert linear motion of an operating element into rotational motion of a first motion transfer element. The transmission operative to translate rotation of the first motion transfer element into rotation of a second motion transfer element through at least a third gear rotatably connected with a planet carrier. The output assembly operatively engaged with the second motion transfer element to rotate the head roller. The input assembly includes a shift arm having a pawl adapted to engage ratchet teeth on the planet carrier when a pull force in a first pull direction is imparted on the single operating element. The input assembly is also configured to automatically retract the single operating element into the head rail assembly and disengage the pawl from the ratchet teeth when no pull force is applied to the single operating element.
The features, utilities, and advantages of various embodiments of the invention will be apparent from the following more particular description of embodiments of the invention as illustrated in the accompanying drawings and defined in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isometric view of a covering for an architectural opening utilizing the present invention.
FIG. 2 is a front elevation view of the covering illustrating operation of the present invention to raise the covering.
FIG. 3 is a front elevation view of the covering illustrating operation of the present invention to lower the covering.
FIG. 4 is an isometric view of a control system for the covering according to one embodiment of the present invention mounted on a right end cap and connected with a head roller of the covering.
FIG. 5A is an exploded isometric view of a left end portion of a head rail assembly.
FIGS. 5B and 5C are an exploded isometric view of the control system according to one embodiment of the present invention.
FIG. 5D is a front right-side isometric view of a shift arm used in the control system depicted in FIG. 5C.
FIG. 5E is a rear right-side isometric view of the shift arm used in the control system depicted in FIG. 5C.
FIG. 5F is a rear right-side isometric view of a ring gear used in the control system depicted in FIG. 5B.
FIG. 5G is a rear right-side isometric view of a cord spool used in the control system depicted in FIG. 5C.
FIG. 5H is an isometric view of left side of a cord guide arm.
FIG. 5J is an isometric view of a right side of a cord guide arm.
FIG. 5K is an isometric view showing a first side of a planet carrier.
FIG. 5L is an isometric view of a spider.
FIG. 6 is a cross-sectional view of the control system depicted in FIG. 4 engaged to lower the covering, taken along line 6 — 6 .
FIG. 6A is a cross-sectional view of the control system depicted in FIG. 6, taken along line 6 A— 6 A.
FIG. 6 AA is the view shown in FIG. 6A without an operating cord and clock spring.
FIG. 6B is a cross-sectional view of the control system depicted in FIG. 6, taken along line 6 B— 6 B.
FIG. 6 BB is a cross-sectional view of the control system depicted in FIG. 6B, taken along line 6 BB— 6 BB.
FIG. 6 BBB is a cross-sectional view of the control system depicted in FIG. 6B, taken along line 6 BBB— 6 BBB.
FIG. 6 BBBB is a view of the control system depicted in FIG. 6 BB showing an operating cord placed in a neutral position.
FIG. 6C is a cross-sectional view of the control system depicted in FIG. 6, taken along line 6 C— 6 C.
FIG. 6D is a cross-sectional view of the control system depicted in FIG. 6, taken along line 6 D— 6 D.
FIG. 6E is a cross-sectional view of the control system depicted in FIG. 6, taken along line 6 E— 6 E illustrating operation of lowering the covering.
FIG. 6F is a cross-sectional view of the control system depicted in FIG. 6, taken along line 6 F— 6 F showing the covering in a fully extended position.
FIG. 7 is a cross-sectional view of the control system depicted in FIG. 4 engaged to raise the window covering, taken along line 7 — 7 .
FIG. 7A is a cross-sectional view of the control system depicted in FIG. 7, taken along line 7 A— 7 A.
FIG. 7 AA is a cross-sectional view of the control system depicted in FIG. 6B, taken along line 7 AA— 7 AA.
FIG. 7 AAA is a cross-sectional view of the control system depicted in FIG. 6B, taken along line 7 AAA— 7 AAA.
FIG. 7B is a cross-sectional view of the control system depicted in FIG. 7, taken along line 7 B— 7 B.
FIG. 7C is a cross-sectional view of the control system depicted in FIG. 7, taken along line 7 C— 7 C.
FIG. 7D is a cross-sectional view of the control system depicted in FIG. 7, taken along line 7 D— 7 D.
FIG. 7E is a cross-sectional view of the control system depicted in FIG. 7, taken along line 7 E— 7 E illustrating operation of raising the covering.
FIG. 7F is a view of the control system and covering depicted in FIG. 7E showing the covering in a fully retracted position.
FIG. 8 is a side view of a control system according to a second embodiment of the invention.
FIG. 9 is an isometric view of a control system according to a second embodiment of the invention.
FIGS. 10A–10C are exploded isometric views of the control system according to the second embodiment of the present invention.
FIG. 11A is a left-side view of a control arm used in the control system depicted in FIG. 10C.
FIG. 11B is a rear-side view of the control arm used in the control system depicted in FIG. 10C.
FIG. 11C is a right-side view of the control arm used in the control system depicted in FIG. 10C.
FIG. 11D is a front-side view of the control arm used in the control system depicted in FIG. 10C.
FIG. 11E is a right rear-side isometric view of the control arm used in the control system depicted in FIG. 10C.
FIG. 11F is a left rear-side view of the control arm used in the control system depicted in FIG. 10C.
FIG. 12 is a rear right-side isometric view of a sun gear used in the control system depicted in FIG. 10B.
FIG. 13 is a right-side isometric view of a ring gear used in the control system depicted in FIG. 10B.
FIG. 14 is a right-side isometric view of a sun gear used in the control system depicted in FIG. 10B.
FIG. 15 is a cross-sectional view of the control system depicted in FIG. 9, taken along line 15 — 15 .
FIG. 15A is a cross-sectional view of the control system depicted in FIG. 15, taken along line 15 A— 15 A.
FIG. 15B is a cross-sectional view of the control system depicted in FIG. 15, taken along line 15 B— 15 B.
FIG. 15 BB 1 – 15 BB 3 are a cross-sectional views of the control system depicted in FIG. 15B, taken along line 15 BB— 15 BB.
FIG. 15C is a cross-sectional view of the control system depicted in FIG. 15, taken along line 15 C— 15 C.
FIGS. 15 D 1 and 15 D 2 are a cross-sectional views of the control system depicted in FIG. 15, taken along line 15 D— 15 D.
FIGS. 15 E 1 and 15 E 2 are a cross-sectional views of the control system depicted in FIG. 15, taken along line 15 E— 15 E.
FIG. 15 F 1 – 15 F 3 are a cross-sectional views of the control system depicted in FIG. 15, taken along line 15 F— 15 F.
FIG. 16 is an isometric view of a control system according to a third embodiment of the invention.
FIGS. 17A and 17B are exploded isometric views of the control system according to the third embodiment of the present invention utilizing a clutch spring to couple a cord spool to a ring gear.
FIGS. 18A and 18B are exploded isometric views of the control system according to the third embodiment of the present invention utilizing a rocker ring clutch assembly to couple the cord spool to the ring gear and a spring ring to secure one tang of a clock spring.
FIG. 19A is a cross-sectional view of the control system depicted in FIG. 16 showing a trigger pulled in a forward position, taken across a shift arm assembly.
FIG. 19B is a cross-sectional view of the control system depicted in FIG. 16 showing a trigger pulled in a forward position, taken across an input ring gear.
FIG. 19C is a cross-sectional view of the control system depicted in FIG. 16 showing a trigger in pulled a forward position, taken across an output ring gear.
FIG. 20A is a cross-sectional view of the control system depicted in FIG. 16 showing a trigger pushed in a rearward position, taken across the shift arm assembly.
FIG. 20B is a cross-sectional view of the control system depicted in FIG. 16 showing a trigger pushed in a rearward position, taken across the input ring gear.
FIG. 20C is a cross-sectional view of the control system depicted in FIG. 16 showing a trigger in pushed in a rearward position, taken across the output ring gear.
FIG. 21 is a cross-sectional view of the control system depicted in FIG. 16 showing the a rocker ring clutch assembly disengage from the input ring gear, taken across the output ring gear.
DETAILED DESCRIPTION OF THE INVENTION
General Overview
Retractable coverings for architectural openings are well known in the art. Such retractable coverings are generally movable between extended and retracted positions. When such coverings are vertically oriented, they are moveable between raised and lowered positions. Retractable coverings may also include vanes or slats, which are typically movable or tiltable between open and closed positions. A head rail typically houses a control system to allow a user to move the retractable covering between retracted and extended positions. As such, the retractable covering may be suspended from the head rail, and may include a bottom rail with vanes or slats disposed between the head rail and the bottom rail. The control system may include an operating element, such as a pull cord, to allow a user to operate to the control system. Operation of the control system causes the retractable covering to move. The present invention provides for a control system having a single operating element allowing a user to move the retractable covering between extended and retracted positions by imparting a repetitive motion to the operating element. For example, when the retractable covering is vertically disposed, a user can raise or lower the retractable covering by imparting a repetitive up and down motion to the pull cord. While the present invention is described below in connection with a covering of the type shown in FIG. 1, it is to be appreciated that the present invention is applicable to other types of devices for covering architectural openings.
Covering
As shown in FIG. 1, the covering 100 includes a vertical first fabric sheet 102 parallel to a vertical second fabric sheet 104 which are interconnected by a plurality of horizontal spaced flexible fabric vanes 106 . The covering 100 shown in FIG. 1 is also provided with a light control feature. The light control feature is affected through motion of the first sheet 102 relative to the second sheet 104 in a direction perpendicular to the fabric vanes 106 . Relative motion between the first sheet and the second sheet changes the angle of the vanes, which in turn, controls the amount of light admitted through the covering. The covering may be configured to react in different ways in response to being lowered or raised. For example, the covering 100 shown in FIG. 1 opens (i.e. vanes are orthogonal to the first sheet and the second sheet) only when the covering is in a fully extended or lowered position, as shown in FIG. 6F. At any position, other than the fully extended position, the covering 100 is in a closed condition with the first fabric sheet 102 and the second fabric sheet 104 being movable vertically together and in close proximity being separated only by the vanes 106 which are disposed in flat substantially coplanar relationship between the sheets, as shown in FIG. 6E.
The first fabric sheet 102 and the second fabric sheet 104 are suspended from a head roller 108 connected with a control system 110 and rotatably supported inside a head rail assembly 112 . The head rail assembly 112 includes a left end cap 114 and a right end cap 116 connected with a front rail 118 . A pull cord 120 is provided to allow a user to operate the control system 110 in order to raise or lower a bottom rail 122 of the covering 100 . Operation of the control system 110 imparts rotational motion to the head roller 108 , which in turn wraps the covering 100 onto the head roller 108 or unwraps the covering from the head roller, causing the bottom rail 122 to move up or down, respectively. As explained in more detail below, the pull cord 120 is connected to an operating cord 124 (see in FIGS. 2 and 3) through a stopper or coupler 125 . Various types of stoppers or couplers 125 may be utilized. For example, the stopper or coupler 125 shown in FIGS. 2 and 3 is in the form of a releasable clasp 126 . In another form, the stopper or coupler may be configured as knot in the operating element. When the control system is not in use, the operating cord 124 is retracted inside the head rail assembly 112 . A tassel 128 may be also provided to allow a user to more easily grasp the pull cord 120 when operating the control system 110 .
Control System
FIGS. 2, 3 , 6 E, 6 F, 7 E, and 7 F illustrate how the control system 110 is operated to raise and lower the covering 100 , respectively. Direction of movement of the covering, either upward or downward, is dictated by the generally downward direction in which the user pulls on the pull cord 120 . More particularly, the downward direction in which the user pulls on the pull cord 120 , which can be selectively angled, causes the control system 110 to engage and rotate the head roller 108 to either wrap or unwrap the covering 100 , which causes the bottom rail 122 to move up or down, respectively. In addition, the control system 100 allows a user to repeatedly pull on the pull cord 120 in the same downward direction to place the covering in a desired position.
In order to raise the covering 100 , as shown in FIGS. 2, 7 E, and 7 F, a user grasps the pull cord 120 and pulls downwardly in a vertical direction with respect to the head rail assembly 112 . The user may also pull downwardly in a slightly right angled diagonal direction to move the covering in the upward direction. As discussed in more detail below, by pulling downwardly either vertically or in the slightly right angled diagonal direction, both referred to as an upward operating pull direction 130 , the control system 110 engages to rotate the head roller 108 in a direction to raise the covering 100 . As the user pulls on the pull cord 120 in the upward operating pull direction 130 , the operating cord 124 is pulled from the control system 110 housed in the head rail assembly 112 . The distance a user may pull the pull cord 120 and operating cord 124 is limited by the length of the operating cord. Once the user releases the pull cord, the control system automatically retracts the operating cord back into the head rail assembly until the stopper or coupler 125 abuts the head rail assembly.
As shown in FIGS. 2, 7 E, and 7 F, the upward distance which the bottom rail 122 moves is dictated by the distance which the pull cord 120 and operating cord 124 are pulled along with a mechanical advantage provided by the control system 110 . The control system 110 may be mechanically configured in different ways so as to vary a first upward distance the covering moves in response to a second distance which the operating cord is pulled. As such, the control system may be configured with increased mechanical advantage and reduced speed when raising the covering, and with increased speed in the downward direction when operating force requirements are less. For example, as shown in FIG. 2, the control system 110 can be configured with a 2:1 mechanical advantage such that in order to move the covering a first upward distance of “X,” the operating cord 124 must be pulled a second distance of“2X.”
Once the bottom rail 122 is raised to the desired position, the user may release the pull cord 120 . Upon release of the pull cord, the operating cord is automatically retracted into the head rail assembly 112 by the control system 110 . The control system also includes a braking feature to hold the covering in position once the user releases tension from the pull cord. If the user pulls the pull cord such that the operating cord is extended to its full length, and the bottom rail does not move the desired distance upward, the user can allow the operating cord to retract into the head rail and then pull again on the pull cord to continue raising the bottom rail 122 . This process can be repeated until the bottom rail 122 has reached the desired position.
In order to lower the covering, as shown in FIGS. 3, 6 E, and 6 F, a user grasps the pull cord 120 and pulls downward in a slightly left angular diagonal direction to move the covering in the downward direction, also referred to as the downward operating pull direction 132 . As discussed in more detail below, by pulling in the downward operating pull direction 132 , the control system 110 engages to rotate the head roller 108 in a direction to lower the covering. As the user pulls on the pull cord in the downward operating pull direction 132 , the operating cord 124 is pulled in unison from the control system 110 housed in the head rail assembly 112 . The distance a user may pull the pull cord 120 and operating cord 124 is limited by the length of the operating cord, and the control system automatically retracts the operating cord back into the head rail assembly until the stopper or coupler 125 abuts the head rail assembly once the user releases the pull cord.
As shown in FIGS. 3, 6 E, and 6 F, the downward distance which the bottom rail 122 moves is dictated by the distance which the pull cord 120 and operating cord 124 are pulled along with the mechanical advantage provided by the control system. As similarly described above with reference to upward movement of the covering, the control system 110 may be mechanically configured in different ways so as to vary a first downward distance the covering moves in response to a second distance which the operating cord is pulled. For example, as shown in FIG. 3, the control system 110 can be configured with a 1:1 mechanical advantage such that in order to move the covering a first downward distance of “Y,” the operating cord 124 must be pulled a distance of “Y.” The present invention can be configured to provide identical or different mechanical advantages in the control system for upward and downward movement of the covering 100 .
Once the bottom rail 122 is lowered to the desired position, the user may release the pull cord 120 . Upon release of the pull cord, the operating cord 124 is automatically retracted into the head rail assembly 112 by the control system 110 . The control system's braking feature mentioned above holds the covering in position once the user releases tension from the pull cord. If the user pulls the pull cord such that the operating cord is extended to its full length, and the bottom rail does not move the desired distance downward, the user can allow the operating cord to retract into the head rail and then pull again on the pull cord to continue lowering the bottom rail. This process can be repeated until the bottom rail has reached a desired position.
Head Roller and Covering Connected Thereto
As previously mentioned, the covering 100 is connected with the head roller 108 , and depending upon which direction the head roller rotates, the covering 100 is either wrapped onto the head roller 108 or unwrapped from the head roller 108 . As shown in FIGS. 4, 5 A, and 6 F, the head roller 108 is hollow and generally tubular-shaped. The head roller is provided with two exterior channels 134 each having a wide inner space 136 and a narrow opening 138 defined by opposing walls 140 on the outer surface of the head roller 108 extending longitudinally along the entire length of the head roller 108 . The first fabric sheet 102 and the second fabric sheet 104 of the covering 100 are provided with flat strips 142 adapted to fit inside the wide inner spaces 136 of the exterior channels 134 and held in position by walls 140 of the exterior channels 134 . The flat strips 142 can be made from stiff material, such as metal or plastic. The first fabric sheet 102 and the second fabric sheet 104 are connected with the head roller 108 by sliding the flat strips 142 into the exterior channels 134 from either end of the head roller 108 , such that the first fabric sheet 102 and the second fabric sheet 104 exit the exterior channels 134 through the narrow opening 138 . It is to be appreciated that the head roller 108 and the covering 100 may utilize various configurations to connect the head roller with the covering. For example, other such configurations are described in U.S. Pat. No. 5,320,154, which is hereby incorporated in its entirety as if fully disclosed herein.
Head Rail Assembly
As shown in FIGS. 4 and 5A, the left end cap 114 and the right end cap 116 fasten to cut edges of the front rail 118 . The left end cap 114 and the right end cap 116 also have an inner side 144 and outer side 146 . Extended edges 148 extend perpendicularly from the inner sides 144 of the left end cap 114 and the right end cap 116 and are adapted to be press fit into slots located on the front rail 118 . It is to be appreciated that extended edges may be configured differently for various shaped front rails. The head roller 108 is supported from the head rail assembly 112 by the control system 110 connected with the right end cap 116 and a cylindrical extension 150 rotatably connected with the left end cap 114 . Although the present invention is depicted and described with the control system connected with the right end cap, it is to be appreciated that the control system may also be connected with the left end cap in other arrangements of the invention.
Head Roller Support
Referring to FIG. 5A, the cylindrical extension 150 is supported on a rotatable left end cap shaft (not seen) extending from the inner side 144 of the left end cap 114 through an extension aperture 152 located in the cylindrical extension 150 . A fastener (not shown) passing into the extension aperture 152 may be used to secure the cylindrical extension 150 to the left end cap shaft. As such, the cylindrical extension 150 can freely rotate either clockwise or counterclockwise. A longitudinal inner groove 154 is located on the inner wall 156 of the head roller 108 and extends the entire length of the head roller. Two longitudinal spaced ridges 158 on the exterior surface 160 of the cylindrical extension 150 are adapted to be received in the longitudinal inner groove 154 on a left end portion 162 of the head roller 108 . As such, the cylindrical extension 150 rotates along with the head roller 108 . The cylindrical extension 150 is also provided with two radially extending tabs 164 to prevent the flat strips 142 from moving longitudinally inside the exterior channels 134 on the head roller 108 .
As shown in FIGS. 4 and 5C, and discussed in more detail below, a circular recess 166 is located on the inner side 144 of the right end cap 116 for receiving a portion of the control system 110 . A rotator spool 168 (FIGS. 4 and 5B), as will be described in more detail later, whose rotation is controlled by the control system 110 , includes a longitudinal fin 170 located on its exterior adapted to cooperatively engage the longitudinal inner groove 154 at a right end portion 172 of the head roller 108 . As such, rotation of the rotator spool 168 causes the head roller 108 to rotate.
Control System Assembly Structure Overview
The control system 110 includes an input assembly 174 , a transmission 176 , and an output assembly 178 cooperatively engaging to convert linear movement of the pull cord 120 imparted by a user into rotational movement of the head roller 108 in the required direction to provide movement of the covering 100 in the desired direction and distance. The input assembly 174 converts linear movement of the pull cord 120 into rotational movement, which is imparted to the transmission 176 . The input assembly 174 also engages the transmission 176 to effect the direction of rotational output from the transmission 176 . The transmission 176 , in turn, imparts rotational movement to the output assembly 178 . The output assembly 178 interfaces with the head roller 108 to rotate the head roller in the direction dictated by the transmission 176 and to provide the braking feature that holds the head roller in position. It is to be appreciated that rotational movement transferred between the input assembly, the transmission, and output assembly may accomplished with any suitable motion transfer elements, such as a gears and couplings. It is to be appreciated that the components described herein may be constructed from various materials. For example, some embodiments of the present invention utilize materials having the low flexible modulus characteristics of a thermoplastic elastomer polymer. Another embodiment utilizes high density polyethylene.
A detailed structural description of the input assembly 174 is provided below, followed by detailed descriptions of the transmission 176 and the output assembly 178 . To assist in better understanding the structural details of the control system, reference is made throughout to the various figures depicting the control system in disassembled and assembled states. For instance, FIGS. 5B and 5C show an exploded isometric view of the control system. FIG. 6 is a cross-sectional view of the assembled control system depicted in FIG. 4 engaged to lower the window covering, taken along line 6 — 6 . FIGS. 6A–6F depict various cross sectional views taken along the length of the control system depicted in FIG. 6. FIG. 7 is a cross-sectional view of the assembled control system depicted in FIG. 4 engaged to raise the covering, taken along line 7 — 7 . FIGS. 7A–7F depict various cross sectional views taken along the length of the control system depicted in FIG. 7. Descriptions of the rotations of various components of the control system (i.e. clockwise or counterclockwise) are always based on the reference point of looking toward the inner side of the right end cap.
Input Assembly Overview
The structure and operation of the input assembly 174 will now be discussed in detail. As shown in FIGS. 4 and 5C, the input assembly 174 includes the pull cord 120 connected with the operating cord 124 through the stopper or coupler 125 , a cord guide arm 180 , a shift arm 182 , a cord pulley 184 , a clock spring 186 , an axle 188 , and a cord spool 190 , all cooperatively engaging to convert linear movement of the pull cord 120 into a rotational movement of the cord spool 190 , which is imparted to the transmission 176 . As discussed in more detail below, the operating cord 124 extends from the stopper or coupler 125 and passes through the cord guide arm 180 , the shift arm 182 , and the pulley 184 from where it is wrapped around the cord spool 190 . As a user pulls on the pull cord 120 to move the covering 100 in the desired direction, the operating cord 124 is unwound from the cord spool 190 . As will be described in detail later, after the user releases tension from the pull cord 120 and operating cord 124 , the clock spring 186 , cord spool 190 , and axle 188 cooperatively engage to automatically wind the operating cord 124 back onto the cord spool 190 . The operating cord 124 is automatically retracted to a point where the stopper or coupler 125 abuts the cord guide arm 180 . Depending on whether the user pulls the pull cord in the upward operating pull direction 130 or the downward operating pull direction 132 , the shift arm 182 pivots to engage the transmission 176 , which in turn, dictates the direction in which the head roller 108 is rotated.
Tassel
As shown in FIG. 4, a tassel 128 may be connected with the pull cord 120 to allow a user to more easily grasp the pull cord when operating the control system 110 . Various tassel configurations may be utilized. For example, the tassel 128 shown in FIG. 4 has four sides 192 sloping toward each other and connecting with a flat top surface 194 having a tassel cord aperture 196 located therein. The pull cord 120 extends from a first knot 198 located at a first end 200 of the pull cord 120 and from the inside of the tassel 128 through the tassel cord aperture 196 . The first knot 198 is tied such that it is too large to pass through the tassel cord aperture 196 . As such, the first knot 198 engages the flat top surface 194 from inside the tassel 128 in order to connect the tassel with the pull cord. The tassel 128 can be constructed from various type of materials, such as plastic or rubber. Depending on how much force the control system imparts on the pull cord when automatically retracting the operating cord, it may or may not be desirable to construct the tassel from a light weight material. It is to be appreciated that the position of the tassel can be adjusted by simply moving the location of the first knot on the pull cord.
Releasable Clasp
As shown in FIG. 4, the stopper or coupler 125 may be in the form of the releasable clasp 126 . As such, the pull cord 120 extends from the tassel 128 and connects with a first portion 202 of the releasable clasp 126 . The pull cord passes 120 through a first clasp cord aperture 204 located in the bottom of the first portion 202 of the releasable clasp 126 . A second knot 206 tied in a second end 208 of the pull cord 120 prevents the pull cord from passing back through the first clasp cord aperture 204 , which acts to connect the pull cord to the first portion 202 of the releasable clasp 126 . The first portion 202 of the releasable clasp releasably connects with a second portion 210 of the releasable clasp 126 . A first end 212 of the operating cord 124 is connected with the second portion 210 of the releasable clasp 126 by having a first knot 214 tied in the first end 212 of the operating cord 124 that is too large to pass through a second clasp cord aperture 216 located in the second portion 210 of the releasable clasp 126 .
The first portion 202 of the releasable clasp 126 can be configured to separate from the second portion 210 of the releasable clasp 126 when excessive tension is applied to the pull cord 120 . As such, the releasable clasp 126 can act to reduce strangulation hazards as well as protect the control system 110 from damage caused by pulling too hard on the pull cord 120 . As shown in FIG. 4, the first portion 202 of the releasable clasp 126 is defined by a first U-shaped member 218 having a base 220 with two arms 222 extending upward therefrom. The arms 222 on the first U-shaped member 218 are configured such that the arms 222 can deflect inwardly toward each other and outwardly away from each other. An inwardly extending tab 224 is located toward the end of each arm 222 on the first U-shaped member 218 . The second portion 210 of the releasable clasp 126 is defined by a second U-shaped member 226 having a base 228 with two arms 230 extending downwardly therefrom. Ledges 232 are also located on opposing sides of the base 228 of the second U-shaped member 226 . The tabs 224 located on the arms 222 of the first U-shaped member 218 are adapted to cooperatively engage the ledges 232 on the base 228 of the second U-shaped member 226 to releasably connect the first portion 202 of the releasable clasp 126 with the second portion 210 of the releasable clasp 126 .
In one form, the releasable clasp is configured such that the tabs 224 slope downward as they extend inwardly toward each other from the arms 220 . The ledges 232 can also be configured to receive the downward sloping tabs 224 . In this configuration, the tabs 224 interacting with the ledges 232 act to pull the arms 222 together in response to tension in the pull cord 120 . As such, the releasable clasp acts to resist separation of the first portion 202 from the second portion 210 as the tension in the pull cord increases. The releasable clasp can further be constructed such that the first portion 202 will break at a predetermined tension in the pull cord. For example, in one embodiment, the first portion of the releasable clasp is constructed to break when the tension in the pull cord reaches 30 pounds.
In another form, the releasable clasp 126 is configured such that when excessive tension is applied to the pull cord 120 , forces resulting from the tension exerted between the tabs 224 and the ledges 232 will cause the arms 222 of the first U-shaped member 218 to move outwardly away from each other until the tabs 224 disengage from the ledges 232 , causing the first portion 202 to separate from the second portion 210 of the releasable clasp 126 .
Spool/Input Assembly
The various elements of the input assembly 174 are supported by the right end cap 116 . As shown in FIG. 5C, the circular recess 166 is defined by a partially circular wall 234 extending from the inner side 144 of the right end cap 116 . A first end cap shaft 236 and a second end cap shaft 238 are integrally connected with and extend perpendicularly from the inner side 144 of the right end cap 116 . As such, the first end cap shaft 236 and the second end cap shaft 238 do not rotate. As discussed in more detail below, the cord spool 190 , the clock spring 186 , and the axle 188 (see FIG. 5B) are supported by the first end cap shaft 236 , whereas the shift arm 182 and the pulley 184 are rotatably supported on the second end cap shaft 238 . The cord guide arm 180 acts to provide outboard support for the second end cap shaft 238 .
Although a detailed structural description of the axle 188 follows, it should be noted that the axle 188 interfaces with the input assembly 174 , the transmission 176 , and the output assembly 178 . As such, additional descriptions of the various functions performed by the axle will be described below separately as part of the detailed descriptions of the input assembly, the transmission, and the output assembly. It is to be appreciated that the axle can be made from various suitable materials. For example, the axle in one embodiment of the present invention is made from a teflon-filled polycarbonate.
As shown in FIG. 5B, the axle 188 may include plurality of outer surfaces defined along its length by varying diameters. Each outer surface is directed to a function more particularly described below. The axle 188 shown in FIG. 5B includes a first surface 240 separated from a second surface 242 by a flange 244 , and a third surface 246 . In some embodiments of the present