Bicycle chain-shifting device

Details Bicycle chain-shifting device Bicycle chain-shifting device

1979-07-26

1981-06-16

Husar, C. 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...

F16H 1104

Patent

active

042735467

ABSTRACT:
In a device for shifting the drive chain on a multi-speed bicycle, a unit having a plurality of concentrically arranged different diameter chain wheels is secured on the axle of the bicycle's driven wheel. A chain trained over one of the chain wheels, passes over a chain guide wheel, and is rotatably supported on a movable support member. By displacing the chain guide wheel, the chain can be moved onto a selected chain wheel. A linkage arrangement is connected to the movable support member and to an adjusting switch for selecting one of the chain wheels. The linkage arrangement includes a first linkage part connected to the movable support member and a second linkage part articulated to the first linkage part so that the two parts are movable relative to one another. A cam disc is mounted on the second linkage part and a cam disc follower is mounted on the first linkage part. A readjustment spring forms a part of the guide device and acts on the first linkage part for maintaining the follower in contact with the cam disc.

REFERENCES:
patent: 3903751 (1975-09-01), Dian
patent: 3974707 (1976-08-01), Nagano
patent: 4030375 (1977-06-01), Nagano
patent: 4106356 (1978-08-01), Nagano et al.
patent: 4132119 (1979-01-01), Nagano et al.
patent: 4185510 (1980-01-01), Juy

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