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US 6,149,541 AGranted
Gas actuated derailleur having an indexing mechanism for setting a chain guide in a plurality of fixed positions
AssigneeShimano Inc.
InventorsYasushi Nakamura, Tadashi Ichida
Life of this patent
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Abstract
A gas actuated derailleur for a bicycle includes a base member, a movable member supporting a chain guide, a coupling mechanism coupling the base member to the movable member so that the movable member moves relative to the base member, and an actuation mechanism responsive to compressed gas for causing the movable member to move relative to the base member.
Claims15
A gas actuated derailleur for a bicycle comprising:
- a base member;
- a movable member supporting a chain guide;
- a coupling mechanism coupling the base member to the movable member so that the movable member moves relative to the base member;
- and
- an actuation mechanism responsive to compressed gas having a substantially constant pressure for causing the movable member to move relative to the base member, wherein the actuation mechanism includes a ratchet that maintains the movable member at a plurality of different positions upon a successive application of compressed gas having the substantially constant pressure value.
2 more elements
Dependencies are inferred from the claim text.