Speed-changing device for a bicycle

Details Speed-changing device for a bicycle Speed-changing device for a bicycle

1981-08-03

1984-09-11

Murtagh, John E.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

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

74475, F16H 1100, B60K 2002

Patent

active

044708238

ABSTRACT:
A speed-changing device for a bicycle, which comprises a control device having a control lever, a derailleur comprising a fitting member, a four member linkage mechanism having a chain guide and a return spring, and a control wire, said control device having a first positioning mechanism for positioning the chain guide only during returning motion of said chain guide by said return spring, said derailleur having a second positioning mechanism for positioning of said chain guide only during forward motion of said chain guide through a pulling operation of said wire.

REFERENCES:
patent: 3394604 (1968-07-01), Kimura
patent: 4193309 (1980-03-01), Nagano
patent: 4198873 (1980-04-01), Nagano et al.
patent: 4232564 (1980-11-01), Yamasaki
patent: 4267744 (1981-05-01), Yamasaki
patent: 4306871 (1981-12-01), Nagano

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