Variable transmission apparatus for bicycles

Details Variable transmission apparatus for bicycles Variable transmission apparatus for bicycles

1997-04-09

1999-04-06

Hannon, Thomas R.

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 78, 474110, F16H 924, B62M 912

Patent

active

058909796

ABSTRACT:
A gear shift apparatus for bicycles of the kind conventionally known as a derailleur is provided with a selectively actuable master cylinder operatively connected to a slave cylinder. The slave cylinder is mounted in a four-bar-linkage connected to a drive chain guide sprocket such that forces acting transversely of the slave cylinder are substantially avoided.

REFERENCES:
patent: 3742777 (1973-07-01), Mathauser
patent: 4938324 (1990-07-01), Van Dyke

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