Patent ID: 8857838

Claim:
A dual drive system for a non-motorized vehicle, said drive system comprising: a first drive unit disposed on a vehicle frame, wherein said first drive unit has a rotary action and is operatively associated with a first wheel assembly for turning a wheel; a second drive unit disposed on said vehicle frame, wherein said second drive unit has a lever action and is operatively associated with said first wheel assembly for turning said wheel; wherein said first drive unit and said second drive unit are independently operable for turning said wheel; a first rotary crank arm disposed on a first side of said frame, and a second rotary crank arm disposed on a second side of said frame; wherein said first and second rotary crank arms move in a circular motion and are operatively connected to a primary drive sprocket that is connected to a wheel sprocket of said first wheel assembly by a primary drive chain; and, wherein said second drive unit includes a first lever crank arm having a first distal end pivotally mounted to said first side of said frame, and a second lever crank arm having a first distal end pivotally mounted to said second side of said frame, wherein said first and second lever crank arms move in a generally vertical up and down reciprocating motion and each of said first and second lever crank arms includes a footrest to facilitate movement of said first and second lever crank arms.