Devices enabling shifting of gears on bicycles

Details Devices enabling shifting of gears on bicycles Devices enabling shifting of gears on bicycles

1993-02-25

1994-10-25

Bui, Thuy M.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

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

474 80, F16H 6100

Patent

active

053584511

ABSTRACT:
Gear shifting device for a cycle having a chain and pinion transmission is provided, which includes a mobile gear shift assembly adapted to laterally displace the chain for enabling passage from one gear to another gear; transformation elements for transforming rotation of at least one pivoting gear into a lateral displacement of the mobile gear shift assembly; and a control mechanism for controlling lateral displacement of the mobile gear shift assembly. Further, the gear shifting device can include an indexing mechanism to further ensure exact positioning of the gears.

REFERENCES:
patent: 3919891 (1975-11-01), Stuhlmuller et al.
patent: 4530678 (1985-07-01), Wechsler
patent: 4619631 (1986-10-01), Darby
patent: 4728316 (1988-03-01), Darby
patent: 4731046 (1988-03-01), Juy
patent: 4861320 (1989-08-01), Nagano
patent: 4887990 (1989-12-01), Bonnard et al.
patent: 4889354 (1989-12-01), Wen
patent: 4894046 (1990-01-01), Browning
patent: 4946425 (1990-08-01), Buhlmann

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