Patent ID: 7963539

Claim:
A wheelchair comprising: a main frame; a seat mounted on the main frame; a pair of front wheels and a pair of rear wheels; a propulsion mechanism for driving either the front or the rear wheels, the propulsion mechanism comprising an arm lever for forward and back movement; a gear train between the arm lever and the front or rear wheels, the gear train comprising: an arm gear which turns in response to forward and back movement of the arm lever; a directional gear driven by the arm gear, the directional gear being movable between a first forward position for moving the rear wheels forward and a second reverse position for moving the rear wheels in reverse; a forward drive gear driven by the directional gear when the directional gear is in the first position; a reverse drive gear driven by the directional gear when the directional gear is in the second position; and a neutral position for the directional gear in which it drives neither the forward drive gear or the reverse drive gear.