Patent ID: 7261175

Claim:
A power assisted bicycle which comprises: a) a manually powered bicycle having a frame, a bicycle drive sprocket, a bicycle driven sprocket, a bicycle roller chain ring connecting the bicycle drive sprocket to the bicycle driven sprocket, and said bicycle having a right pedal crank arm and a left pedal crank arm attached to a spindle, which manually rotates the bicycle drive sprocket, b) a motor driven sprocket and left pedal assembly replacing the bicycle left pedal on the bicycle spindle, c) an electric motor attached to the bicycle frame, said motor having an outward-extending drive shaft with a motor drive sprocket and a one-way clutch, attached onto said drive shaft, d) a motor roller chain ring connected in concert with the motor drive sprocket and motor driven sprocket of the motor-driven sprocket and left pedal assembly, such that the electric motor provides a power assist to the manually powered bicycle, with the one-way clutch permitting unassisted pedaling without resistance of the de-energized motor, and e) an electrical power source interfacing with an electrical control system for supplying electrical energy to operate and control the electric motor, wherein said electrical control system further comprises a controller aid a manual throttle which electrically interfaces together with said electric motor and said electrical power source.