Chain guide in a front derailleur

Details Chain guide in a front derailleur Chain guide in a front derailleur

1984-06-20

1986-03-04

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...

474144, F16H 718

Patent

active

045739501

ABSTRACT:
A chain guide in a front derailleur has an inner guide plate and an outer guide plate, the outer guide plate having a chain biasing region coming into contact with and biasing a driving chain when the chain is switched from a larger diameter front chain gear to a smaller diameter front chain gear and a chain moving region which is positioned below the biasing region and through which the chain moves when the chain is switched to the smaller diameter front gear. The chain moving region includes a swollen portion swelling outwardly with respect to the front chain gears, thereby eliminating sound generation without sacrificing speed change efficiency.

REFERENCES:
patent: 4223562 (1980-09-01), Nagano et al.

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