Ratchet pedalling system for bicycle comprises ratchet operated toothed ring connected to chainwheel with return spring for crank and requires only one foot for operation.

摘要

The pedalling system has a pedal crank (1) with a ratchet (2), a toothed ring (3) for the ratchet, a chainwheel (4) and a return spring (5) for the pedal crank. The toothed ring is connected to the chainwheel. The right and left side toothed rings are connected to the chainwheel, and the left and right pedal cranks are similar but independent. The pedals are arranged in a slightly inclined position to ease their use. Their drive couplings are combined.