Front derailleur for a bicycle provided with a swingingly movabl

Details Front derailleur for a bicycle provided with a swingingly movabl Front derailleur for a bicycle provided with a swingingly movabl

1978-07-10

1980-03-25

Mitchell, James C.

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

F16H 900

Patent

active

041944097

ABSTRACT:
A front derailleur for a bicycle pivotally couples a base member fixed to the frame of the bicycle, two linkage members, and a movable member having a chain guide mounted thereon which together constitute a four-connected component linkage mechanism. When a bicycle speed change is made, the movable member moves relative to the base member such that the chain guide component swingingly moves with the amount of movement of the chain guiding portion of the chain guide being larger than the amount of movement of the movable member.

REFERENCES:
patent: 3974707 (1976-08-01), Nagano
patent: 4030375 (1977-06-01), Nagano
patent: 4037484 (1977-07-01), Morse

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