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
1980-03-10
1982-09-14
Staab, Lawrence 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...
74531, F16H 722
Patent
active
043493424
ABSTRACT:
In a chain shifting device for a bicycle or the like, a bicycle chain extending from the pedal crank can be shifted between the wheels of a chain wheel set positioned on a driven wheel. The chain is trained over the guide wheel and tensioning wheel of a chain guiding and tensioning member. A system of parts guides the chain guiding and tensioning mechanism between its different positions. The system of parts includes a movable joint block connected to the chain guiding and tensioning mechanism and a fixed joint block connected to the bicycle frame. An articulated lever and a guide member are connected by different joints to the movable and fixed joint blocks and are joined together by still another joint. A locking mechanism interlocks two of the parts of the system which are movable relative to one another for securing at least one position of the chain guiding and tensioning mechanism.
REFERENCES:
patent: 2678020 (1954-05-01), Jaeger
patent: 2826093 (1958-03-01), Draper
patent: 3742777 (1973-07-01), Mathauser
patent: 3974707 (1976-08-01), Nagano
patent: 4012966 (1977-03-01), Lieberman et al.
patent: 4231264 (1980-11-01), Bergles
Fichtel & Sachs AG
Staab Lawrence J.
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