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
1983-06-27
1985-11-12
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...
474117, F16H 708, F16H 1108
Patent
active
045525463
ABSTRACT:
A speed changer for a bicycle includes a plurality of sprocket wheels provided on the hub of its rear wheel and having different diameters, a transmission chain, a movable member, a chain positioning frame supported rotatably on the movable member and carrying a guide pulley and a tension pulley for guiding the chain about one of the sprocket wheels while maintaining the chain under tension, and a spring having one end fastened to the movable member for urging the frame in the direction which enables the chain to be tensioned. The other end of the spring is engaged with a mechanism mounted for rotation relative to the frame and an adjustable coupling is provided between the mechanism and the frame to vary the spring force applied to the frame to thereby vary the spring tension applied to the chain.
REFERENCES:
patent: 2428166 (1947-09-01), Letourneur
patent: 2431513 (1947-11-01), Schwinn
patent: 2693116 (1954-11-01), Juy
patent: 2839939 (1958-06-01), Juy
patent: 3125894 (1964-03-01), Juy
patent: 4403978 (1983-09-01), Huret
patent: 4406643 (1983-09-01), Shimano
Kisliuk Bruce M.
Novosad Stephen J.
Ryobi Ltd.
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