Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including belt shiftable axially from one to another surface...
Patent
1996-02-21
1997-12-09
Graysay, Tamara L.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including belt shiftable axially from one to another surface...
F16H 5904
Patent
active
056954212
ABSTRACT:
A bicycle chain derailleur is biased against the movement of a cable by a first spring that has enhanced biasing characteristics. In accordance with one embodiment of the present invention, the enhanced biasing characteristics are provided by the addition of a second spring element, where the second spring is an elastomer coating formed on coils of the first spring. In another embodiment a torsion spring is disposed in the chain derailleur which works in concert with the first spring to enhance the biasing characteristics. In yet another embodiment, both the elastomer coating and the torsion spring are employed.
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Boyd Tony
Graysay Tamara L.
Shimano Inc.
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