Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including belt shiftable axially from one to another surface...
Patent
1985-02-15
1987-01-20
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...
F16H 924
Patent
active
046378081
ABSTRACT:
A bicycle rear derailleur including a tensioner frame which rotatably support a guide pulley and a tension pulley, a shifter for shifting the tensioner frame in directions substantially parallel to an axis of a rear wheel hub, the tensioner frame including a tension pulley support arm which is resiliently urged to pivotally move rearwardly of the bicycle, and a compensating mechanism for compensating a sagging in an endless drive chain, which is arranged to stretch out the drive chain rearwardly of the bicycle so that a distance between a geometrical vertical line passing through a center of the tension pulley and a vertical tangential line at a rearmost point of a rearwardly stretched portion of the drive chain is larger than a radius of the guide pulley when the tension pulley support arm takes its rearmost position.
REFERENCES:
patent: 3125894 (1964-03-01), Juy
patent: 3583249 (1971-06-01), Morse
Bui Thuy M.
Kawamura Cycle Co., Ltd.
Novosad Stephen J.
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