Derailleur for a bicycle

Details Derailleur for a bicycle Derailleur for a bicycle

1977-12-20

1981-07-21

Scott, Samuel

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

280236, F16H 1104

Patent

active

042791723

ABSTRACT:
A derailleur for a bicycle comprising four members: a stationary member, first and second linkage members and a movable member. They are arranged in the form of a pantograph mechanism. Associatd with this mechanism is a pivotal member and a spring means which may be attached to any one of the members except the second linkage member. A Bowden cable having an inner wire and an outer sheath is attached between the pivotal member and the second linkage member so that the spring means serves as both a return spring for the pantograph mechanism and as a lost motion connecting means when it is a not possible to immediately shift the derailleur.

REFERENCES:
patent: 3535950 (1970-10-01), Shimano et al.
patent: 3890847 (1975-06-01), Dian
patent: 3903751 (1975-09-01), Dian
patent: 4038878 (1977-08-01), Dian
patent: 4051738 (1977-10-01), Dian

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