Bicycle rear derailleur

Details Bicycle rear derailleur Bicycle rear derailleur

2005-07-19

2010-02-23

Siconolfi, Robert A (Department: 3657)

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including mechanism for shifting belt axially on spaced...

C474S080000

Reexamination Certificate

active

07666111

ABSTRACT:
A bicycle rear derailleur includes a base portion, a coupling mechanism, a moveable member, a pivot shaft, a tension plate, a biasing spring and a guide plate. The base portion attaches to a bicycle frame. The coupling mechanism has first and second ends. The first end is coupled to the base portion and the second end is movable relative to the base portion. The movable member is coupled to the second end and the pivot shaft is coupled to the movable member. The tension plate is pivotally coupled to the movable member by the pivot shaft and supports a chain tensioning pulley. The biasing spring is operatively coupled to the movable member and the tension plate for biasing the tension plate in a chain tensioning direction. The guide plate is pivotally coupled to the pivot shaft in a non-biased manner and supports a chain guiding pulley.

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