Abstract: A single speed gear assembly suitable for use in a wheelchair is disclosed. The assembly incorporates a sun gear together with a plurality of planet gears which reduces the amount of torque required by the user in order to effect rotation of the wheel to which the assembly is attached. Specific ratios for the diameter of the sun gear to the each planet gear is taught. The assembly conveniently eases the use of a wheelchair by those confined to using same.

Abstract: For use on a wheelchair, a wheel assembly has a change speed gear mounted in the wheel hub. A handwheel is connected to the input of the speed gear and the output of the speed gear is connected to the hub. A free wheel device can be provided between the handwheel and the speed gear. To prevent unwanted backward movement, a clutch assembly can be provided. The clutch assembly engages with a member attached to the hub and permits forward movement only. The clutch can be disengageable. The footrests of the wheelchair can be pivoted up and down by a hand lever mounted on the wheelchair and connected, as by a cable, to a lever on the footrest. A hand lever is provided on each side of the wheelchair.