Manual traction device for bicycle, includes handlebar with alternately swinging articulated arms individually having gears meshed with racks to transmit swinging motion to one of front wheel and back wheel

摘要

The manual traction device has a handlebar (4) with two articulated arms (5) individually having gears (6) meshed with racks (8). The gear and rack engagement transmits the swing of the articulating arms to one of the front wheel (2) and back wheel. The device also has mechanisms for limiting the swinging movement of the arms and for stopping the arms.