Patent ID: 8143823

Claim:
A bi-directional different-speed-ratio electric motor driving device with bi-directional input, comprising: an electric motor having an output arranged to rotate in either of two directions; an electric motor operative control device for the electric motor, said control device controlling at least a rotating direction of said electric motor; an input device for providing instructions to said electric motor operative control device; a first transmission device having a power input directly or indirectly connected to the output of said electric motor, said first transmission device having a bi-directional output and a speed change ratio that depends on a rotating direction of said power input, whereby changing a rotating direction of the electric motor changes a rotating speed of an output of the first transmission device; a rotating load having a power input directly or indirectly connected to the output of said first transmission device, wherein a rotating speed or torque of said power input to said load is controlled by changing a direction of said motor.