BICYCLE DERAILLEUR AND METHOD

摘要

A front derailleur for use on devices such as bicycles is movable about a yaw axis while it moves laterally. The front derailleur may include a linkage in between a mount and a cage, with the linkage pivoting about two non-parallel axes. The front derailleur may include a linkage in between the mount and the cage that has links of different effective lengths. The front derailleur may include a single link and a cam.

主权项

1. A front derailleur for a bicycle having a frame member and a chain engaging one of a plurality of chainwheels, the frame member having a longitudinal axis, the front derailleur comprising:
a mount configured to be fixed to the frame member; a movable element separate from the mount and interiorly receiving a portion of the chain, the movable element contacting an exterior side of the chain to laterally displace the chain between the plurality of chainwheels; and a linkage connecting the movable element to the mount and configured to move the movable element laterally with respect to the frame member and rotatably about a yaw axis substantially parallel to the longitudinal axis.