Bicycle transmission having infinitely variable drive ratio

摘要

A torque transmission apparatus having an infinitely variable gear ratio particularly suited for use as a bicycle transmission. The apparatus may be mounted on conventional bicycles and replaces the usual derailleur mechanism. A novel means is used to effect the gear changes which requires less force than previous devices. All force transmitting components of the apparatus are mechanically engaged without relying on friction which eliminates any possibility of slippage within the transmission.