Patent ID: 7150463

Claim:
A wheelchair comprising: a chair frame including a pair of lateral frame parts that extend in a first direction and that are spaced apart from each other in a second direction transverse to the first direction; a pair of suspension arms, each of which extends in the first direction and is connected pivotally to said chair frame adjacent to a respective one of said lateral frame parts such that said suspension arms are pivotable relative to said chair frame about a common pivot axis that extends in the second direction; a pair of clutches, each of which is mounted on a respective one of said suspension arms; a pair of drive wheels, each of which is coupled to a respective one of said clutches; a pair of shock absorbers, each of which is mounted between a respective one of said lateral frame parts and a respective one of said suspension arms and is capable of absorbing road shock forces; and a pair of limiting units, each of which includes a mounting seat mounted on a respective one of said lateral frame parts and formed with a guide slot unit therethrough, and a connecting component that extends through said guide slot unit and that mounts movably a respective one of said suspension arms on said mounting seat, wherein pivoting movement of said suspension arms about the pivot axis results in movement of said connecting components of said limiting units along said guide slot units in said mounting seats.