Adjustable quick release seatback system particularly for use with wheelchairs
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A47C-007/42
A47C-007/40
출원번호
US-0428331
(2003-05-01)
발명자
/ 주소
Dennon,Murray
Lincoln,John S.
출원인 / 주소
Cascade Designs, Inc.
대리인 / 주소
Graybeal Jackson Haley, LLP
인용정보
피인용 횟수 :
36인용 특허 :
13
초록▼
A wheelchair seatback assembly suitable for detachable mounting to the back-supporting posts of a wheelchair. The back assembly includes a relatively rigid shell member carrying post-engaging pins and a plurality of mounting clips attachable to wheelchair posts. At least selected ones of the mountin
A wheelchair seatback assembly suitable for detachable mounting to the back-supporting posts of a wheelchair. The back assembly includes a relatively rigid shell member carrying post-engaging pins and a plurality of mounting clips attachable to wheelchair posts. At least selected ones of the mounting clips are further formed to releasably engage the post-engaging pins. The mounting units are also formed for single-handed automatic unlocking and release of the pair of hooks from the mounting units and posts upon rotation of the shell member forwardly over the wheelchair seat by an amount in excess of any displacement occurring during normal use of the wheelchair.
대표청구항▼
What is claimed: 1. A wheelchair seatback system for mounting a seatback to a pair of spaced apart posts or canes of a wheelchair back frame, comprising: a seatback comprising a first pair of laterally spaced and opposed mounting locations and a second pair of laterally spaced and opposed mounting
What is claimed: 1. A wheelchair seatback system for mounting a seatback to a pair of spaced apart posts or canes of a wheelchair back frame, comprising: a seatback comprising a first pair of laterally spaced and opposed mounting locations and a second pair of laterally spaced and opposed mounting locations longitudinally spaced from the first pair of opposed mounting locations; a first pair of laterally extending pins attached to the first pair of opposed mounting locations on the seatback; a second pair of laterally extending pins attached to the second pair of opposed mounting locations on the seatback; a first pair of mounting clips respectively attached to each cane and positioned to receive the first pair of extending pins; and a second pair of mounting clips respectively attached to each cane and positioned to receive the second pair of extending pins wherein one of the first pair or the second pair of mounting clips include a pair of releasable self-locking mechanisms for retaining a pair of extending pins and releasing the same upon user activation of the mechanism. 2. The system of claim 1 wherein each self-locking mechanism comprises a bracket portion housing a rotatable cam body and retaining a pawl, and wherein the cam body defines a major recess for selectively receiving an extending pin. 3. The system of claim 2 wherein the bracket portion comprises a base joining two sides, each side having a first end, a second end, an interior surface and an exterior surface, and each side defining opposed slots for receiving a pin, and wherein the rotatable cam body and retaining pawl are each supported by the two sides of the bracket using a shaft. 4. The system of claim 2 wherein the retaining pawl comprises a major finger at one end and an arm at an opposite end, and wherein the cam body further defines a minor recess for selectively receiving the major finger. 5. The system of claim 4 wherein the bracket portion comprises a base joining two sides, each side having a first end, a second end, an interior surface and an exterior surface, and each side defining opposed slots for receiving a pin, and wherein the rotatable cam body and retaining pawl are each supported by the two sides using a shaft, and the releasable self-locking mechanism further comprises a biasing element having a first end and a second end wherein the first end contacts the bracket base and the second end contacts the pawl. 6. The system of claim 4 wherein the retaining pawl further comprises a ball extension and the bracket further comprises a receiver to releasably receive the ball extension. 7. The system of claim 4 wherein the retaining pawl further comprises a minor finger spaced apart from the major finger at the one end, and the cam body further defines a groove for selectively receiving the minor finger. 8. The system of claim 1 wherein at least one of the first or second pair of laterally extending pins comprises a pair of pin bars, each pin bar having a bar portion defining at least one opening, and wherein the extending pin is substantially orthogonally located on the bar portion. 9. The system of claim 8 wherein the extending pin is positioned at one end of the bar portion. 10. The system of claim 8 wherein the at least one opening is one of a slot or a circular hole. 11. The system of claim 1 further comprising a pair of angle brackets directly connected to at least one of the first or second pair of laterally spaced and opposed mounting locations to provide a means by which the pins are connected to the seatback. 12. The system of claim 11 wherein each angle bracket comprises a first leg and a second leg, the first leg having means for engaging the seatback and the second leg having means for engaging a pin bar comprising a bar portion defining at least one opening and an extending pin substantially orthogonally located on the bar portion, wherein one of the seatback or the first leg defines a slot and one of the pin bar or the second leg defines a slot. 13. The system of claim 1 further comprising a cushion removably associated with the seatback, the cushion comprising a flexible, fluid impervious envelope defining a sealed chamber and enclosing a resilient element; and a valve sealingly engaged with the envelope to modulate fluid flow into and out of the chamber. 14. The system of claim 13 wherein the resilient element is bonded to an inner surface of the envelope. 15. A removable seatback system, with user determinable anterior and posterior positioning, for mounting to a pair of spaced apart support members comprising: a seatback comprising a pair of superior mounting locations and a pair of inferior mounting locations wherein one pair of the superior or inferior mounting locations has attached thereto a first connecting means for linking the seatback system to the support members comprising one of a pair of extending pins capable of anterior and posterior movement or a pair of pin receiving members; and a second connecting means for linking the seatback system to the support members comprising one of a pair of extending pins capable of anterior and posterior movement or a pair of pin receiving members positioned on the support members to receive the first connecting means wherein each said pin receiving member comprises a releasable self-locking mechanism for selectively receiving and retaining an extending pin and releasing the same upon user activation of the mechanism. 16. The system of claim 15 wherein the pin receiving members each comprise a bracket portion housing a rotatable cam body and retaining a pawl, and wherein the cam body defines a major recess for selectively receiving an extending pin. 17. The system of claim 16 wherein the bracket portion comprises a base joining two sides, each side having a first end, a second end, an interior surface and an exterior surface, and each side defining opposed slots for receiving a pin, and wherein the rotatable cam body and retaining pawl are each supported by the two sides of the bracket using a shaft. 18. The system of claim 16 wherein the retaining pawl comprises a major finger at one end and an arm at an opposite end, and wherein the cam body further defines a minor recess for selectively receiving the major finger. 19. The system of claim 18 wherein the bracket portion comprises a base joining two sides, each side having a first end, a second end, an interior surface and an exterior surface, and each side defining opposed slots for receiving a pin, and wherein the rotatable cam body and retaining pawl are each supported by the two sides using a shaft, and the releasable self-locking mechanism further comprises a biasing element having a first end and a second end wherein the first end contacts the bracket base and the second end contacts the pawl. 20. The system of claim 18 wherein the retaining pawl further comprises a ball extension and the bracket further comprises a receiver to releasably receive the ball extension. 21. The system of claim 18 wherein the retaining pawl further comprises a minor finger spaced apart from the major finger at the one end, and the cam body further defines a groove for selectively receiving the minor finger. 22. The system of claim 15 wherein a pin bar comprises the extending pin, each pin bar having a bar portion defining at least one opening, and wherein the extending pin is substantially orthogonally located on the bar portion. 23. The system of claim 22 wherein the extending pin is positioned at one end of the bar portion. 24. The system of claim 22 wherein the at least one opening is one of a slot or a circular hole. 25. The system of claim 15 further comprising a pair of angle brackets directly connected to one pair of the superior or inferior mounting locations. 26. The system of claim 25 wherein each angle bracket comprises a first leg and a second leg, the first leg having means for engaging the seatback and the second leg having means for engaging a pin bar comprising a bar portion defining at least one opening and the extending pin substantially orthogonally located on the bar portion, wherein one of the seatback or the first leg defines a slot and one of the pin bar or the second leg defines a slot. 27. The system of claim 15 further comprising a cushion removably associated with the seatback, the cushion comprising a flexible, fluid impervious envelope defining a sealed chamber and enclosing a resilient element; and a valve sealingly engaged with the envelope to modulate fluid flow into and out of the chamber. 28. The system of claim 27 wherein the resilient element is bonded to an inner surface of the envelope. 29. A method for removing and inserting a seatback from a pair of support elements, the seatback comprising a pair of superior lateral mounting locations, each having a pin bar comprising a bar portion and an extending pin, and a pair of inferior lateral mounting locations, each having a pin bar comprising a bar portion and an extending pin, wherein each extending pin is receivable by a receiving member mountable to a pair of substantially upright support elements disposed on opposite lateral sides of the seatback when engaged therewith, the method comprising: disengaging the seatback from the support elements by manual operation a pair of releasable self-locking mechanism located on the substantially upright support elements so as to permit exposure and removal of the pin bars there from, and condition the mechanism to subsequently and passively receive the pin bars; translating the seatback in one of a posterior or anterior direction such that the formerly captive pin bars can be removed from the releasable self-locking mechanisms; and engaging the seatback with the support elements by positioning the pin bars in the releasable self-locking mechanisms and translating the seatback in one of a posterior or anterior direction to secure the seatback to the upright support elements. 30. The method of claim 29 wherein the the pin bars are partially engaged with the mechanism prior to securing the seatback.
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이 특허에 인용된 특허 (13)
Bar Christopher (Roath IL GB3) Guthrie Calvin L. (Belleville IL), Backrest assembly for a wheelchair.
Roossien Charles P. ; Pugh David C. ; Groendal Dale M. ; Massey James E. ; Scheper Robert M. ; Nagel Duane F. ; Smith Bruce M. ; Smith Douglas A. ; Scholten Brian L., Chair construction and method of assembly.
Dinsmoor ; III John C. (Westminster CO) Van Everen Barry (Loveland CO) Johnson Michael W. (Lafayette CO) Denton Grant C. (Boulder CO), Wheelchair back system.
Smith, Bruce M.; Löw, Glen Oliver; Ludwig, James N.; Battey, Robert J.; Peterson, Gordon J.; Holdredge, Russell T.; Krupiczewicz, Todd D.; Brock, Nathan R., Chair.
Smith, Bruce M.; Löw, Glen Oliver; Ludwig, James N.; Battey, Robert J.; Peterson, Gordon J.; Roslund, Jr., Richard N.; Holdredge, Russell T.; Krupiczewicz, Todd D.; Brock, Nathan R., Chair.
Hector, Jr., Melvin G.; Yentzer, Dana R., Structure, components and method for constructing and operating an automatically self locking manually propelled vehicle such as a wheel chair.
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