Derailleur shifter

Details Derailleur shifter Derailleur shifter

1986-07-08

1987-09-15

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

046937005

ABSTRACT:
An improved derailleur shifter is disclosed which includes a pivot arm secured to the frame of the bicycle in a stationary relationship, a shifter arm pivotally secured to the pivot arm in a manner to rotatively move relative to the frame, a chain slide attached to the shifter arm in a rotative and angularly adjustable engagement, a spring biasing between the pivot arm and the shifter arm to continuously urge the chain slide against the upper run of the bicycle chain to depress the chain; a stabilizer interconnected between the pivot arm and the shifter arm in a manner to allow substantially unrestricted counter-clockwise pivotal movement of the shifter arm relative to the pivot arm and to restrict clockwise pivotal movement of the shifter arm relative to the pivot arm, and a flexible cable interconnecting the shifter arm with the derailleur whereby the derailleur will be automatically operated to index the chain across the small diameter cluster gears in response to pivotal movement of the shifter arm as caused by interaction of the bicycle chain and the chain follower upon changes in stress in the bicycle chain.

REFERENCES:
patent: 3121575 (1964-02-01), Bourgi
patent: 3613466 (1971-10-01), Houghton
patent: 3769848 (1973-11-01), McGuire
patent: 3929025 (1975-12-01), Perry
patent: 4061046 (1977-12-01), Lang
patent: 4343613 (1982-08-01), Leiter et al.
patent: 4395251 (1983-07-01), King et al.
patent: 4599079 (1986-07-01), Chappell

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