IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0771533
(2010-04-30)
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등록번호 |
US-8376463
(2013-02-19)
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발명자
/ 주소 |
- Cooper, Rory Alan
- Pearlman, Jonathan Lee
- Hargroder, Todd
- Hong, Eun-Kyoung
- Llu, Hsin-Yi
- Wang, Hongwu
- Salatin, Benjamin Arthur
|
출원인 / 주소 |
- University of Pittsburgh—of the Commonwealth System of Higher Education
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인용정보 |
피인용 횟수 :
3 인용 특허 :
11 |
초록
▼
Angle adjustable backrest made of a lightweight, durable, adjustable, backrest for ultralight manual wheelchairs. Light-weight material can include composites for a rigid backrest for promotion of healthier and functional interface. Angle adjustment can be any desired range such as a range from −5 d
Angle adjustable backrest made of a lightweight, durable, adjustable, backrest for ultralight manual wheelchairs. Light-weight material can include composites for a rigid backrest for promotion of healthier and functional interface. Angle adjustment can be any desired range such as a range from −5 degree to 55 degrees (i.e. 85 degrees to 145 degree with respect to horizontal with the seat). No tools are necessary for any of the angle adjustments. The backrest has a horizontal adjustment (fore-aft) that can be any desired range such as 1 inch. The height selection depends on the length of the wheelchair frame tubes. The present invention improves the ease and simplicity of adjusting the backrest by or for the user, as well as enhances the aesthetic appearance and adds features necessary for achieving commercial readiness. The present invention can be retro fit onto a wide range for ultralight wheelchairs.
대표청구항
▼
1. A backrest angle adjustable mechanism for attachment of a backrest to a wheelchair tubing comprising, a tubing attachment bracket being capable of attachment to the wheelchair tubing, wherein the tubing attachment bracket includes a center line along a common longitudinal axis;a rod connected to
1. A backrest angle adjustable mechanism for attachment of a backrest to a wheelchair tubing comprising, a tubing attachment bracket being capable of attachment to the wheelchair tubing, wherein the tubing attachment bracket includes a center line along a common longitudinal axis;a rod connected to the tubing attachment bracket, wherein the rod includes a through-bore of varying diameter to form a shoulder at a distal end;a screw disposed in the through-bore of the rod; wherein a distal end of the screw extends out the distal end of the rod when assembled therein, wherein a proximal end of the screw includes a shoulder larger than a through-bore diameter at the distal end of the rod;a biasing device entrapped between the shoulder of the screw and the shoulder of the rod,wherein the rod, the screw, and the biasing devise have an axial center line along the common longitudinal axis, wherein the screw is biased along the common longitudinal axis when the screw is further extended out of the distal end of the rod,a pivot bar pivotably connected to the tubing attachment bracket and attachable to the backrest, wherein the pivot bar rotates around the common longitudinal axis;an inner gear having a center line along the common longitudinal axis, wherein the inner gear is attached to the pivot bar to form a pivotal assembly, wherein the inner gear includes one or more male gear teeth;a cover having a center line along the common longitudinal axis; wherein the cover includes a plurality of internal female gear teeth that cooperate with the one or more male gear teeth of the inner gear to lock an angular position of the backrest;wherein the cover is attached to the distal end of the screw for repeated longitudinal traverse cycles along the common longitudinal axis; andwherein, the backrest is free to rotate about the common longitudinal axis when the cover is longitudinally traversed away from the inner gear to disengage the one or more male teeth of the inner gear from the plurality of internal female gear teeth of the cover. 2. The backrest angle adjustable mechanism according to claim 1, further comprises an outer gear having an axial center line along the common longitudinal axis adjacent the inner gear, wherein the outer gear includes one or more male gear teeth; wherein the outer gear and the inner gear have the same outer diameter and male gear teeth dimensions. 3. The backrest angle adjustable mechanism according to claim 2, wherein rotational movement of the inner gear relative to the outer gear is prohibited when the plurality of internal female gear teeth of the cover are in contact with the plurality of male gear teeth of the inner gear and the plurality of male gear teeth of the outer gear. 4. The backrest angle adjustment mechanism according to claim 2, wherein the outer gear further comprises an angular position forward stop and an angular position backward stop to cooperation with a stop of the inner gear to limit the backrest to an angular rotation. 5. The backrest angle adjustable mechanism according to claim 1, wherein the outer gear is attached to the rod. 6. The backrest angle adjustable mechanism according to claim 5, wherein the tubing attachment bracket, the rod, and the outer gear form a static assembly. 7. The backrest angle adjustable mechanism according to claim 1, wherein the pivot bar attachment bracket and inner gear form a rotating assembly. 8. The backrest angle adjustment mechanism according to claim 1, wherein the biasing device is a spring. 9. The backrest angle adjustment mechanism according to claim 1, where a cable is attached to the cover to traverse the cover along the common longitudinal axis when the cable responds to a pulling motion in a direction away from the inner gear. 10. The backrest angle adjustment mechanism according to claim 9, further comprising a handle attached to the cable to actuate the pulling motion of the cable in a direction away from the inner gear. 11. The backrest angle adjustment mechanism according to claim 9, wherein the cable is attached to a second cover to simultaneously traverse each of the plurality of covers towards each other and along the common longitudinal axis with a single actuation motion. 12. The backrest angle adjustment mechanism according to claim 1, wherein the cover is an only cover. 13. A backrest angle adjustable mechanism for attachment of a backrest to a wheelchair tubing comprising, a tubing attachment bracket being capable of attachment to the wheelchair tubing, wherein the tubing attachment bracket includes a center line along a common longitudinal axis;a pivot bar being capable of attachment to the backrest, wherein the pivot bar includes a center line along the common longitudinal axis; anda pivot bar locking mechanism releaseably connecting the tubing attachment bracket and the pivot bar thereto, wherein the pivot bar locking mechanism comprises: a first gear with one or more male teeth attached to the pivot arm;a cover with a plurality of female teeth meshable with the one or more male teeth of the first gear;a second gear disposed between the cover and the first gear attached to the pivot arm, wherein the second gear includes one or more gear teeth; anda biasing device having a line of action along the common longitudinal axis to automatically advance the cover along the common longitudinal axis to engage the plurality of female teeth of the cover with the one or more gear teeth of the pivot arm gear and the second gear;wherein the backrest angle adjustment mechanism is in a locked position when one or more male teeth of the first gear are meshed with plurality of female teeth of the cover,wherein the pivot bar is free to rotate about the common longitudinal axis when the pivot bar locking mechanism is in a pivot arm released position. 14. The backrest angle adjustment mechanism according to claim 13, wherein the biasing device induces an axial force onto the cover along the common longitudinal axis. 15. The backrest angle adjustment mechanism according to claim 13, wherein the biasing device is disposed between the cover and the tubing attachment bracket.
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