| 主权项 |
1. A crank system, comprising:
a first crank assembly coupled to a first end of a first axle and coupled to a first pedal, the first crank assembly comprising a first pedal crank arm, a first mid crank arm, and a first crank arm, wherein the first pedal crank arm is rotatably coupled to the first pedal, the mid crank arm is rotatably coupled to the pedal crank arm and to the crank arm, and the crank arm is fixedly coupled to a first end of a first axle; a second crank assembly coupled to a second end of the first axle and a second pedal, the second crank assembly comprising a second pedal crank arm, a second mid crank arm, and a second crank arm, wherein the second pedal crank arm is rotatably coupled to the second pedal, the second mid crank arm is rotatably coupled to the second pedal crank arm and to the second crank arm, and the second crank arm is fixedly coupled to a second end of a first axle, wherein the first crank arm and the second crank arm are adapted such that during rotation the first and second crank arms are positioned longitudinally opposed during a rotational cycle; and a rotating wheel fixedly coupled to the first crank assembly and the second crank assembly such that as the first and second pedals are actuated by a user, the rotating wheel rotates thereby actuating a chain and inducing motion in a vehicle. |
