Derailleur gearchange for bicycle - has sprockets on rear block moved to change gear, instead of chain

摘要

The derailleur gearchange is for bicycles. It has two jockey wheels, which are located behind each other in the power line, and a changeable chain drive (E) in the primary jockey wheel. A rear sprocket block (B) is axially displaceable relative to the primary jockey wheel. The block is positioned, so that not the chain, but the sprocket concerned, is moved into a position, which is defined by the line chain wheel - chain guide - chain tensioner. USE/ADVANTAGE - Derailleur gearchange on bicycle using new-type changing method.