Manually-propelled wheelchair

Details Manually-propelled wheelchair Manually-propelled wheelchair

A - Human Necessities

61

G

A61G 5/02 (2006.01) B62B 5/04 (2006.01) A61G 5/10 (2006.01)

Patent

CA 2472716

A manually-propelled wheelchair having a frame having a forward-facing seat, two independently castered front wheels mounted to the frame, a rear axle suspended beneath the frame, and two rear driving wheels, each rotatably mounted upon an opposite end of the axle. Rotatably mounted upon opposite ends of the axle are two lever arm assemblies, each comprised of a discrete lever arm ending in a handle and extending far enough from the axle to allow an occupant of the seat to grip the handle. A discrete one-way clutch connects the lever arm to the wheel mounted upon the same end of the axle. The one-way clutches may be disconnected by the occupant by operating twist grip handles mounted upon the lever arms. Although guide bars are not required, two guide bars can be fixedly attached to the frame, one upon each side of the frame and extending parallel to the plane of a respective driving wheel, the handle of each lever arm is slidingly coupled to a discrete one of the guiding bars and the handle and the lever arm are linked by a linkage configured to allow the handle to follow the guide bar while the lever arm move about an axis of the axle. Occupant-operable disk brakes are provided for each driving wheel, a rotor of each disk brake connected to a driving wheel so as to rotate with the driving wheel and a caliper of the disk brake mounted upon a corresponding lever arm or on the frame.

L'invention porte sur une chaise roulante à propulsion manuelle comportant: un cadre; un siège faisant face à l'avant; deux roulettes avant orientables indépendantes montées sur le cadre; un essieu arrière suspendu situé à hors du cadre; deux roues d'entraînement montées aux extrémités opposées de l'essieu; deux leviers montés aux extrémités opposées de l'essieu comprenant chacun un bras de levier distinct terminé par une poignée et s'étendant suffisamment loin de l'essieu pour permettre à l'occupant de saisir la poignée; deux roues libres distinctes reliant chacune le bras de levier à la roue montée sur la même extrémité de l'essieu et pouvant être déconnectées par l'occupant en agissant sur les poignées tournantes montées sur chacun des bras de levier; et deux freins à disque actionnables par l'occupant, montés sur chacune des roues et comportant chacun un rotor solidaire d'une roue et tournant avec elle, et un étrier monté sur le bras de levier correspondant.

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