Gear change system

Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including belt shiftable axially from one to another surface...

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F16H 5900, F16H 6100, F16H 6300

Patent

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058038485

ABSTRACT:
In order to improve a gear change system for bicycle derailleur gears, comprising a first chain changer for shifting the chain to different chain wheels on the pedal-crank side, a second chain changer for shifting the chain to different pinions on the wheel side, and a gear change device with a first switching unit for the first chain changer and with a second switching unit for the second chain changer and with a manually operated switching element by means of which both switching units can simultaneously be actuated so that by means of the latter the chain can simply be shifted to chain wheel/pinion combinations selected for a gear sequence and from a switched gear a transition is possible only to the next closest gear in the gear sequence, in such a way that a great degree of ease and comfort in switching can be achieved with the least possible effort, it is proposed that the first chain changer is a mechanical chain changer mechanically controllable through the first switching unit, and that the second chain changer is a chain changer electrically controllable through the second switching unit.

REFERENCES:
patent: 4194408 (1980-03-01), Hedrich
patent: 4412828 (1983-11-01), Darby
patent: 4530678 (1985-07-01), Wechsler
patent: 5213548 (1993-05-01), Colbert et al.
patent: 5213549 (1993-05-01), Blanchard
patent: 5470277 (1995-11-01), Romano

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