Gear-shift control bicycles and similar vehicles

Details Gear-shift control bicycles and similar vehicles Gear-shift control bicycles and similar vehicles

1988-10-04

1989-12-19

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 80, F16H 1108

Patent

active

048879908

ABSTRACT:
A gear shift control for bicycles, of the "derailleur" type which has guig members for a chain that can be moved crosswiss between at least two separate positions by a cable from a remotely located shifter, which includes a mobile element that receives the movement of the cable, a mobile toothed element connected to the guiding members of the chain, a memory element carried by the mobile element and working with the teeth of the mobile toothed element; and swinging members acting on the memory element so that, for a movement of the cable with a small amplitude, followed by a release, the toothed element is moved in a first direction along a path corresponding to the interval between two teeth, and for a movement of the cable of a greater amplitude, followed by a release, the toothed element is moved in a second direction also along a path corresponding to the interval between two teeth.

REFERENCES:
patent: 3861227 (1975-01-01), Hunt
patent: 4504250 (1985-03-01), Juy
patent: 4507101 (1985-03-01), Nagano

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