IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0523660
(1983-08-15)
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발명자
/ 주소 |
- Morgenstern, Robin
- Osann, Jr., Edward W.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
70 인용 특허 :
3 |
초록
▼
A lumbosacral backrest for use with chairs, beds and various other furniture, vehicle seats, and wheelchairs. The device, which may be portable or built-in, has an upstanding foundation frame of generally rectangular form, a yieldable back support on that frame, and a regulator spindle interposed be
A lumbosacral backrest for use with chairs, beds and various other furniture, vehicle seats, and wheelchairs. The device, which may be portable or built-in, has an upstanding foundation frame of generally rectangular form, a yieldable back support on that frame, and a regulator spindle interposed between the frame and the yieldable back support. The regulator spindle is journalled for rotation longitudinally of the yieldable back support and may be stopped at any selected position within its range of rotational adjustment. This provides a transverse plane of rigidity across the back support at such selected position and thereby effects an adjustment in the contour of the back support. Adjustment of the regulator spindle may be accomplished manually or by power means.
대표청구항
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1. A lumbosacral backrest for use with chairs, beds and other furniture, vehicle seats, and wheelchairs, comprising, in combination: (a) an upstanding foundation frame having a pair of side edge portions and a pair of end edge portions; (b) a flexible back support fastened to said foundation fra
1. A lumbosacral backrest for use with chairs, beds and other furniture, vehicle seats, and wheelchairs, comprising, in combination: (a) an upstanding foundation frame having a pair of side edge portions and a pair of end edge portions; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle having a longitudinal cross-section of double concave form, and said flexible back support conforming to that form, disposed transversely of said foundation frame and said flexible back support and interposed therebetween to provide a transverse plane of rigidity across said back support; (d) means situated adjacent to but inboard of said side edge portions journaling said regulator spindle for rotational movement longitudinally of the bow in said flexible back support; and (e) means for adjustably positioning said regulator spindle in any selected position within its range of rotational movement longitudinally of said bow to define and locate said transverse plane of rigidity across said back support at such selected position and thereby effect an adjustment in the contour of said back support. 2. A lumbosacral backrest for use with chairs, beds and other furniture, vehicle seats, and wheelchairs, comprising, in combination: (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said foundation frame and said flexible back support and interposed therebetween to provide a transverse plane of rigidity across said back support; (d) means journaling said regulator spindle for rotational movement longitudinally of the bow in said flexible back support; and (e) means for adjustably positioning said regulator spindle in any selected position within its range of rotational movement longitudinally of said bow to define said transverse plane of rigidity across said back support at such selected position and thereby effect an adjustment in the contour of said back support. (f) said spindle having a longitudinal cross-section of double concave form and said flexible back support conforming to that form. 3. A lumbosacral backrest for use with chairs, beds and other furniture, vehicle seats, and wheelchairs, comprising, in combination: (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said foundation frame and said flexible back support and interposed therebetween to provide a transverse plane of rigidity across said back support; (d) means journaling said regulator spindle for rotational movement longitudinally of the bow in said flexible back support; (e) said back support comprising a plurality of resilient bands which frictionally engage the peripheral surface of said spindle; and (f) means for adjustably positioning said regulator spindle in any selected position within its range of rotational movement longitudinally of said bow to define said transverse plane of rigidity across said back support at such selected position and thereby effect an adjustment in the contour of said back support; (g) said spindle having a longitudinal cross-section of double concave form and said flexible back support conforming to that form. 4. A lumbosacral backrest for use with chairs, beds and other furniture, vehicle seats, and wheelchairs, comprising, in combination: (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said foundation frame and said flexible back support and interposed therebetween to provide a transverse plane of rigidity across said back support; (d) means journaling said regulator spindle for rotational movement longitudinally of the bow in said flexible back support; (e) said back support comprising a plurality of resilient bands which frictionally engage the peripheral surface of said spindle; (f) means for adjustably positioning said regulator spindle in any selected position within its range of rotational movement longitudinally of said bow to define said transverse plane of rigidity across said back support at such selected position and thereby effect an adjustment in the contour of said back support; (g) said spindle having a longitudinal cross-section of double concave form and said flexible back support conforming to that form; (h) said backrest being provided with a cover of flexible sheet material such as fabric having a front panel and a rear panel, and a resilient pad of foam material or other material with similar resilient properties is interposed between said back support bands and the front panel of said cover. 5. A lumbosacral backrest for use with chairs, beds, vehicle seats, and wheelchairs, comprising, in combination: (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said foundation frame and said flexible back support and interposed therebetween to provide a transverse plane of rigidity across said back support; (d) means journaling said regulator spindle for rotational movement longitudinally of said flexible back support and in frictional engagement therewith; (e) manually actuated means for adjustably positioning said regulator spindle in any selected position within its range of rotational movement longitudinally of said flexible back support to define a transverse plane of rigidity across said back support at such selected position and thereby effect an adjustment in the contour of said back support; and (f) said spindle having a longitudinal cross-section of double concave form and said flexible back support conforming to that form in each said selected position. 6. A backrest as set forth in claim 5, wherein said manually actuated means for adjustably positioning said regulator spindle comprises at least one rack fixed to said foundation frame, and at least one pinion fixed to said regulator spindle for toothed engagement with said rack. 7. A backrest as set forth in claim 5, wherein said manually actuated means for adjustably positioning said regulator spindle comprises a pair of racks fixed in laterally spaced relation on said foundation frame, and a pair of pinions spaced axially on said regulator spindle for engagement with said pair of racks. 8. A backrest as set forth in claim 7, wherein each said pinion has teeth which project above the peripheral surface of said spindle. 9. A backrest as set forth in claim 7, wherein each said pinion has teeth which do not project above the peripheral surface of said spindle. 10. A backrest as set forth in claim 6, wherein said pinion is fashioned in polygonal cross-section with a tooth projecting generally radially from each side of the polygon; the area of each polygon side adjacent a corresponding tooth serving as a locking face when said tooth is in engagement with a tooth recess in said rack. 11. A backrest as set forth in claim 5, wherein said back support comprises a plurality of resilient bands which frictionally engage the peripheral surface of said spindle; said manually actuated means for adjustably positioning said regulator spindle comprises at least one rack defined by a series of perforations in at least one said resilient band; said manually actuated means further comprises at least one pinion on said regulator spindle having teeth adapted to engage said rack; and an upstanding rib fixed to said foundation frame engages said spindle in opposition ot said rack, said rib having a longitudinal clearance groove for accommodating said pinion teeth. 12. A lumbosacral backrest for use with chairs, beds, vehicle seats, and wheelchairs, comprising, in combination; (a) an upstanding foundation frame; (b) a flexible back support fastened to said foundation frame in outwardly bowed relation therewith; (c) a regulator spindle disposed transversely of said foundation frame and said flexible back support and interposed therebetween to provide a transverse plane of rigidity across said back support; (d) said regulator spindle having a longitudinal cross-section of double concave form and said flexible back support conforming to that form; (e) means supporting said regulator spindle for rotational movement longitudinally of said flexible back support and in frictional engagement therewith; and (f) power actuated means connected to said regulator spindle for adjustably positioning said spindle in any selected position within its range of rotational movement longitudinally of said flexible back support to define a transverse plane of rigidity across said back support at such selected position and thereby effect an adjustment in the contour of said back support. 13. A backrest as set forth in claim 12, wherein said power actuated means includes: (a) a reversible motor mounted on said foundation frame; (b) a worm shaft journaled on said foundation frame and disposed transversely of said regulator spindle, said worm shaft being driven by said motor; (c) a worm wheel fixed on said spindle and disposed for driving engagement by said worm shaft; (d) a motor controller; and (e) a motor control switch for actuating said motor through said controller to adjustably position said spindle in any selected position within its range of rotational movement. 14. A backrest as set forth in claim 13, including: (a) said spindle supporting means including longitudinal guideways on said foundation frame; (b) a pair of stop abutments at the extremities of said guideways; (c) a pair of limit switches fixed to said pair of stop abutments; (d) a motor controller connected to said limit switches and to said motor; and (e) a manually actuated directional control switch connected to said motor controller. 15. A backrest as set forth in claim 12, wherein said power actuated means includes: (a) a motor mounted on said foundation frame; (b) a dual threaded shaft journaled on said foundation frame and driven by said motor, said shaft being disposed transversely of said regulator spindle; (c) a reversible follower drivingly connected to said dual threaded shaft for reciprocation thereon; (d) means on said follower drivingly connecting same with the central portion of said spindle; (e) a motor controller; and (f) a motor control switch for actuating said motor through said controller to reciprocate said regulator spindle in a timed cycle for lower back massage. 16. A backrest as set forth in claim 12, wherein said power actuated means includes: (a) a rack fixed to said foundation frame adjacent one side edge portion thereof; (b) an upstanding rib fixed to said foundation frame adjacent the opposite side edge portion thereof; (c) one end of said regulator spindle being supported for rotational movement along said rack and the other end being supported for rotational movement along said rib; (d) a reversible motor housed within a recess in said end of said spindle adjacent said rack; (e) bearing means interposed between the housing of said motor and said spindle permitting rotation of said spindle relative to said motor housing; (f) a sliding base mounted for reciprocating movement along said rack; (g) said motor housing being fixed to said sliding base and having an output pinion drivingly meshing with said rack for reciprocating said sliding base and rotating said spindle relative to said rack and said rib; (h) a motor controller connected to said motor; and (i) a motor control switch for actuating said motor through said controller to adjustably position said spindle at any selected position within its range of rotational movement. 17. A backrest as set forth in claim 16, including: (a) a pair of stop abutments at the extremities of said rack; (b) a pair of limit switches fixed to respective ones of said stop abutments and engageable by said sliding base, said limit switches being connected to said motor controller; (c) a manually actuated two position directional control switch adapted upon actuation of one of said limit switches to be rendered ineffective for moving said regulator spindle in the direction of said actuated limit switch, while remaining effective to move said spindle in the opposite direction. 18. A backrest as set forth in claim 17, wherein said motor control switch has a third position for actuating said motor through said motor controller to reciprocate said sliding base, said motor, and said regulator spindle in a timed cycle for lower back massage.
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