| 摘要 |
<p>A human-powered wheeled vehicle has a wheeled frame, a seat for the rider of the vehicle, a pair of levers (2D) arranged for pivotal movement about a common axis, a sprocket arranged for rotation about same common axis, clutch means or other means whereby movement of a lever (2D) in a first direction about the common axis is transmitted to the sprocket whereas movement of a lever (2D) in a direction opposite to said first direction is not transmitted to the sprocket, and means for the transmission of drive from the sprocket to a wheel of the vehicle, the arrangement being such that, when the rider is sitting on the seat, the rider's feet can act on the levers (2D) so that alternate extension of the driver's legs results in alternate pivotal movement of the levers (2D).</p> |
