Derailleur for a bicycle

Details Derailleur for a bicycle Derailleur for a bicycle

1984-04-30

1986-12-02

Novosad, Stephen J.

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

046262296

ABSTRACT:
A derailleur for a bicycle is provided with a base member, a movable member movable axially of a multistage sprocket assembly, a linkage member for moving the movable member axially of the multistage sprocket assembly, a guide mechanism supported to the movable member and guiding a driving chain from one sprocket to another at the multistage sprocket assembly, and a coiled return spring. At an intermediate portion of the linkage member there is a provided a support shaft for the spring, with the support shaft supporting the coiled portion of the spring. A first end portion of the spring is retained to the linkage member carrying the support shaft, and a second end portion of the spring is movably engaged with a member movable relative to the linkage member, thereby reducing the amount of deflection of the spring for a given amount of movement of the movable member.

REFERENCES:
patent: 4241617 (1980-12-01), Nagano et al.
patent: 4443208 (1984-04-01), Kozakae

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