Device for guiding the chain of derailleur bicycle gear changers

Details Device for guiding the chain of derailleur bicycle gear changers Device for guiding the chain of derailleur bicycle gear changers

1976-10-26

1977-11-15

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74241, 74242, F16H 722

Patent

active

040580202

ABSTRACT:
A bicycle derailleur gear changer has a device for guiding the chain and the device has chain-guiding and chain-adjusting pulleys which are mounted between the ends of two cheek plates. The device is movable to effect gear changes by transferring the chain from one to another of sprockets attached to the hub of the bicycle rear wheel. The cheek plates are specially shaped with radial extensions adjacent the chain-guiding pulley, the extensions terminating in turned over edges facing away from the pulley to prevent possible jamming of the gear changer when the chain is driven in the reverse direction.

REFERENCES:
patent: 3847028 (1974-11-01), Bergles
patent: 3960025 (1976-06-01), Juy
patent: 3994167 (1976-11-01), Juy

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