Patent ID: 8220814
Filing Date: 2012-07-17
Classification: B62K,B62M

Abstract:
1. A bicycle propelled by stepping motion, comprising: a) a frame; b) a forward wheel and a rear wheel, each of the wheels mounted to the frame for rotation relative to the frame about a horizontal rotational axis of the wheel; c) a steering wheel coupled to the forward wheel for steering the bicycle; d) an axle mounted to the frame for relative rotation about a horizontal rotational axis of the axle; e) a drive sprocket fixed to the axle for rotation together about the horizontal rotational axis of the axle; f) a driven sprocket mounted to the rear wheel for rotation together in a forward angular direction about the horizontal rotational axis of the rear wheel; g) an endless chain coupling the drive sprocket and the driven sprocket for rotation together; h) a pair of pedals, each of the pedals mounted to the frame for relative pivoting between an upper position and a lower position of the pedal; i) biasing means urging each of the pedals from its lower position to its upper position; j) each of the pedals associated with motion converting means for rotating the drive sprocket relative to the frame in the forward angular direction in response to downward pivoting of the pedal, the motion converting means comprising: