Patent ID: 8297636

Claim:
A human-powered driving device having a bi-directional input and a constant rotating direction output, comprising: a human foot or hand driven input device for receiving a rotary input in either of two directions or a reciprocating rotary input, including (a) a pedal, a crank, and a driving wheel set, or (b) a handle, a handle shaft, and a driving wheel set; a constant output direction transmission device for receiving a bi-directional input from the input device and producing a constant direction output having only one rotational direction, wherein the constant output direction transmission device includes transmission components constituted by at least one of a gear set, a friction wheel set, a chain and sprocket section, a belt and pulley section, a transmission crank and wheel set, a fluid transmission unit, and an electromagnetic force actuator, and wherein a speed ratio between an input end and an output end of the constant output direction transmission device is fixed or variable; and a load connected to receive the output of the constant output direction transmission device.