Combined out-in stroke mechanical transmission for facilitating and multiplying the speed of cycles and other pedal appliances

摘要

Combined input-output mechanical transmission to facilitate and multiply the speed of cycles and other pedaled systems. ;Designed to limit the amount of rotation of the pedal mechanism and the force on the pedals whilst multiplying the speed, the invention consists in a combination of transmission elements running from a first multiplying engagement element (A2RL) mounted free wheeling (3) on the axle of the pedal mechanism which drives with its rotation by the movement of the pedals in the advancing direction, by passing through intermediate elements (B, C, . . . ) of multiplying engagement constituted by concentric toothed wheels turning on axles fixed in a chassis connected to the frame, up to the last pinion (Z2), fixed on the hub of the rear wheel so as to turn with it and to take advantage, by the acquired speed, of its lever effect to return the energy by the same gearing to free the axle of the pedal mechanism by the free wheel effect (3) thereby to relieve the pedaling. It replaces the conventional chain transmission or more often takes over from it by clutching when it is mounted in parallel. The invention relates to the industry of cycles and other locomotion means.