Patent ID: 7344146
Filing Date: 2008-03-18
Classification: A61G

Abstract:
1. A wheelchair having a frame, a seat, a pair of front wheels, and a pair of rear wheels, the wheelchair including: two 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 operating on each push-pull lever to convert movement of said push-pull levers to rotary motion; forward and reverse drive sprockets for engagement with the power transmission of each push-pull lever, the drive sprockets rotatably attached to the wheelchair; forward and reverse sprocket gears attached to each rear wheel; two chains for engaging the forward drive gears to the forward drive sprockets; and two chains for engaging the reverse drive gears to the reverse drive sprockets; two derailers for moving the chains from one of the multiplicity of forward drive sprockets to another of the multiplicity of the forward drive sprockets.