Patent ID: 8757311
Filing Date: 2014-06-24
Classification: B62M

Abstract:
1. A motorized driving device for mounting to a frame of a bicycle, said bicycle comprising a pedal drive mechanism coupled to a chain for transferring a drive force to at least one chainwheel, said motorized driving comprising: a) a power source of rotary power, said power source further comprising: b) a power transmission mechanism for coupling between said pedal drive mechanism and said chain; said power transmission mechanism further comprising a first unidirectional power transmission module and a second unidirectional power transmission module, such that an auxiliary power transmitted by said power transmission mechanism from said power source to said chain is independent from a pedal power transmitted by said power transmission mechanism from said pedal drive mechanism to said chain; wherein said first unidirectional power transmission module further comprising an active flange for coupling to said pedal drive mechanism, and said second unidirectional power transmission module further comprises a passive flange coupled to said power source; said active flange providing said pedal power from said pedal drive mechanism to said chain; said passive flange providing said auxiliary power from said power source to said chain; said first unidirectional power transmission module further comprising: