Patent ID: 8857839

Claim:
A lever drive system for a scooter, comprising: a crank arm having a first distal end pivotally carried on a frame and operatively associated with a drive sprocket, wherein reciprocating movement of said crank arm causes rotation of said drive sprocket for moving a drive chain operatively associated with a wheel assembly; a footrest disposed on said crank arm for operating said crank arm; a cam member pivotally mounted to said frame generally adjacent said crank arm; a cam follower carried by said crank arm engaging said cam member, wherein movement of said crank arm causes said cam follower to move along a contoured control surface of said cam member for controlling an up and down movement of said crank arm; and, wherein said contoured control surface includes a first surface area defining a drive section for controlling downward movement of said crank arm, a second surface area defining a lifting section for controlling upward movement of said crank arm, and a third surface area defining a stationary section controlling transitions between upward and downward motion of said crank arm.