Patent ID: 7568714

Claim:
A power assist module removably attachable to a bicycle for providing power to the bicycle, the bicycle having a frame supporting at least one driven wheel and a drive gear coupled to the driven wheel, said power assist module comprising: a housing; an electric motor support by said housing; an output drive gear supported by said housing and operatively coupled to said electric motor for selectively engaging and driving the drive gear of the bicycle; at least one frame mounting block extending from said housing and adapted to engage the frame of the bicycle and automatically align said output drive gear for meshed engagement with the drive gear of the bicycle; an attaching hook extending from said housing and engagable with the frame of the bicycle for selectively and removably attaching said power assist module to the bicycle; and an attaching clamp extending from said housing and spaced below said attaching hook wherein said frame mounting block is positioned between said attaching hook and said attaching clamp, said attaching clamp further engagable with the frame of the bicycle for selectively and removably attaching said power assist module to the bicycle with said output drive gear aligned and engaged with the drive gear of the bicycle.