초록 ▼

A wheelchair, for either street or sports (e.g. racing) use, is comfortable and easy-to-use, lightweight, and may be folded compactly for transportation. A plastic pallet supports a collapsible chair frame, and is mounted to a base frame for adjustment along the base frame to thereby adjust the cent

A wheelchair, for either street or sports (e.g. racing) use, is comfortable and easy-to-use, lightweight, and may be folded compactly for transportation. A plastic pallet supports a collapsible chair frame, and is mounted to a base frame for adjustment along the base frame to thereby adjust the center of gravity of the wheelchair. The rear drive wheels and the caster-type front wheels are both mounted to the frame for easy removal, utilizing a split-block receiving the spindle or shaft from the wheels. The blocks may be pivoted about axes perpendicular to the axes of rotation of the rear wheels to adjust the camber of the wheels, and－by effecting flexing of a leaf spring to which the blocks are mounted－the toe of the rear wheels may be adjusted.

대표청구항 ▼

A wheelchair comprising: a base frame comprising a pair of side plates and a web extending between said side plates; a plurality of wheels including two drive wheels and at least one other wheel; means for propelling said drive wheels, said means consisting of hand engagable rim means associated wit

A wheelchair comprising: a base frame comprising a pair of side plates and a web extending between said side plates; a plurality of wheels including two drive wheels and at least one other wheel; means for propelling said drive wheels, said means consisting of hand engagable rim means associated with said drive wheels; means for mounting said wheels to said base frame so that they are rotatable with respect to said frame, but so that the wheelbase thereof is substantially fixed; chair support means; and means for mounting said chair support means to said frame so that the position of said chair support means with respect to said frame and with respect to said drive wheels is adjustable, so that the center of gravity of said wheelchair is adjustable by adjusting the portion of said chair support means with respect to said frame, and without adjustment of the position of said drive wheels with respect to said frame, said means comprising: a pair of inner and outer flanges of said chair means for receipt of each of said frame side plates; means defining elongated openings in said web adjacent each of said side plates; and fastener means extending through said elongated openings into operative association with said chair support means. A wheelchair comprising: a base frame; two drive wheels and at least one other wheel; means for mounting said drive wheels to said base frame, said means comprising a separate shaft means operatively attached to each of said drive wheels and defining an axis of rotation of said drive wheels, and a block operatively mounted to said base frame for receipt of each of said shaft means; means for operatively mounting each of said blocks to said base frame for operative pivotal movement with respect to said base frame about an axis substantially perpendicular to its respective drive wheel axis of rotation, so that the camber of said rear wheels may be adjusted by operative pivotal movement of said blocks with respect to said base frame, said means comprising pin means associated with each block; and means for effecting pivotal movement of said blocks with respect to said frame, said means comprising for each block an eccentric cam rotatable about an axis spaced from and parallel to said pin means, and an elongated slot receiving said eccentric cam; one of said cam and said slot being operatively associated with said frame, and the other of said cam and said slot being operatively associated with said block.