Derailleur for a bicycle

Details Derailleur for a bicycle Derailleur for a bicycle

1984-02-17

1985-07-23

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 900, F16H 1100

Patent

active

045306770

ABSTRACT:
A derailleur for a bicycle has a base member, a movable member movable axially of a multi-stage sprocket assembly, a first feeding mechanism for moving the movable member, and a guide mechanism supported to the movable member and including a guide pulley and tension pulley for guiding the driving chain to one sprocket of the multi-stage sprocket assembly. The guide mechanism has a second feeding means including a controller actuated by operation of the first feeding mechanism to move the driving chain carried by the guide pulley axially of the multi-stage sprocket assembly by use of the movement of the chain. During changing, the chain is forcibly moved by the second feeding means to switch the chain to a desired sprocket.

REFERENCES:
patent: 2839939 (1958-06-01), Juy
patent: 4322209 (1982-03-01), Shimano
patent: 4384864 (1983-05-01), Bonnard
patent: 4406643 (1983-09-01), Shimano

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