Pedal lever drive has two tread surfaces on rear end of lever arms which have rotational joint, and with upwards and downwards movement transmit through connecting rod a force onto wheel sprocket driving rear wheel via chain

摘要

The pedal lever drive has two tread surfaces (1) on the rear end of the lever arms (2). The lever arms have a rotational joint (6) and with upwards and downwards movement transmit through a connecting rod (3) the force onto a wheel sprocket (4) which drives the rear wheel via a circulating chain (5).