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
1978-08-31
1980-10-07
Braun, Leslie
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 700, F16H 900
Patent
active
042261309
ABSTRACT:
A front derailleur of the link type is described comprising a base member fixed to a seat tube by fixing means, two linkage members pivoted swingably to the base member, and a movable member pivoted to the linkage members and having a chain guide, the linkage members having first end portions pivoted to the base member and second end portions pivoted to the movable member, the second end portions being positioned upward from the seat tube with respect to the base member, the chain guide pivoted to the second end portions being supported upward from the base member, whereby when the linkage members swing, the chain guide moves axially with respect to the chain gears in a path curved upward in a circular arc.
REFERENCES:
patent: 3730012 (1973-05-01), Juy
patent: 3813955 (1974-06-01), Huret et al.
patent: 3890847 (1975-06-01), Dian
patent: 4030374 (1977-06-01), Isobe
patent: 4051738 (1977-10-01), Dian
Braun Leslie
Shimano Industrial Company Limited
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