Rear derailleur for a bicycle

Details Rear derailleur for a bicycle Rear derailleur for a bicycle

1984-07-30

1986-09-16

Novosad, Stephen J.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

474144, F16H 718

Patent

active

046120041

ABSTRACT:
A rear derailleur for a bicycle is provided with a chain guide having a guide pulley, a tension pulley and pulley plates carrying both of the pulleys, for switching a driving chain to any desired particular sprocket of a multistage sprocket assembly for changing the bicycle speed. A holder is provided at the pulley plate positioned closest to the multistage sprocket assembly and is positioned outside the path of movement of the chain travelling from the tension pulley to the guide pulley. When the chain is driven in reverse from the multistage sprocket assembly to the guide pulley, the holder holds the chain along the aforementioned path, whereas the chain would otherwise be caused to leave the path.

REFERENCES:
patent: 3184993 (1965-05-01), Swenson

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