Front derailleur for a bicycle

Details Front derailleur for a bicycle Front derailleur for a bicycle

1999-03-29

2000-08-08

Hannon, Thomas R.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

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474127, F16H 6100, F16H 722

Patent

active

060994258

ABSTRACT:
A front derailleur for a bicycle is provided to move or shift a chain between two or more sprockets for changing gears. The front derailleur can be connected to the shift cable such that the shift cable is pulled upwardly or downwardly relative to the bicycle frame. The front derailleur has a fixed member adapted to be coupled to a portion of the bicycle, a chain guide for shifting the chain of the bicycle and a linkage assembly coupled between the fixed member and the chain guide. The chain guide is located above the fixed member and a coil spring is used to bias the chain guide from an extended position to a retracted position. A detachable guide member is removably coupled to the linkage assembly for guiding the shift cable downwardly and then upwardly relative to the bicycle frame for use with an upwardly pulled shift cable. If the detachable guide member is removed, then the shift cable is only pulled downwardly relative to the bicycle frame for use with a downwardly pulled shift cable.

REFERENCES:
patent: 5620384 (1997-04-01), Kojima et al.
patent: 5779581 (1998-07-01), Fujii

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