Derailleur for a bicycle

Details Derailleur for a bicycle Derailleur for a bicycle

1988-02-22

1989-05-23

Bui, Thuy M.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

474 82, F16H 1108

Patent

active

048326623

ABSTRACT:
A derailleur for a bicycle is provided which includes a deformable linkage mechanism and is adapted to deform the linkage mechanism through a control wire for changing the bicycle speed. A saver arm is supported to the linkage mechanism to be forwardly and backwardly swingably. The control wire is fixed to the saver arm, and a saver spring is interposed between the saver arm and the linkage machanism, the saver arm includes a spring urging portion which deflects the saver spring when the saver arm swings forwardly and backwardly and applies to the saver arm a spring reaction to restore a saver arm in the direction opposite to the swinging direction thereof.

REFERENCES:
patent: 3535950 (1970-10-01), Shimano et al.
patent: 3903751 (1975-09-01), Dian
patent: 4198873 (1980-04-01), Nagano et al.
patent: 4470823 (1984-09-01), Shimano

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