Quick release pedal mounting structure and system

Retractable/extendable crank using a cylindrical cam, an end cam, or a swash plate cam, and bicycle using the same

Crank Transmission Mechanism with Elliptical Trace

Bicycle eccentric bottom bracket

Chain drive transmission, propelled by bent and prolonged levers - configurable mechanism

Method and device for pedalling

Pedal apparatus

Rehab cycle crank

Variable geared bicycle pedal

Drive mechanisms for human-powered machines

Power cranks

Coupling profile between a central axle of a bottom bracket of bicycle transmission and a pedal crank

Crank apparatus for bicycles and the like

Rotary rehabilitation apparatus and method

Rotary rehabilitation apparatus and method

Crank apparatus for manually powered cycles