Patent ID: 6234504
Filing Date: 2001-05-22
Classification: A61G,Y10S

Abstract:
A wheelchair having a frame, a seat, a pair of rotatably mounted front wheels, and a pair of rear wheels, the wheelchair including:two separately operable push-pull levers, each having a near end and a removed end and each rotatably mounted at the removed end to the frame of the wheelchair;power transmission means operating on each push-pull lever to convert movement of said push-pull levers in one direction to rotary motion;two drive sprockets for engagement with the power transmission means of each push-pull lever, the drive sprockets rotatably attached to the wheelchair;a multiplicity of sprocket gears attached to each rear wheel;two chains for engaging the drive sprockets to the sprocket gears; andtwo derailers for moving the chains from one of the multiplicity of drive gears to another of the multiplicity of the drive gears.