Front derailleur for a bicycle

Details Front derailleur for a bicycle Front derailleur for a bicycle

1987-04-06

1988-03-29

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...

474140, F16H 718

Patent

active

047340835

ABSTRACT:
A derailleur includes a linkage mechanism including a fixing member, a chain guide having an inner guide plate and an outer guide plate generally parallel to one another, and a linkage device supported to the fixing member and movable axially relative to the front chain gear assembly. The inner guide plate includes an elongate urging portion on its inner side surface closest to the outer guide plate. The urging portion is swollen in a direction toward the outer guide plate and is provided to contact the driving chain to urge it when the chain guide is moved to shift the driving chain. The inner guide plate has a first mounting device positioned above the urging portion and another mounting device positioned below the urging portion. The linkage device is connected to the inner guide plate at both the mounting devices.

REFERENCES:
patent: 4479787 (1984-10-01), Bonnard
patent: 4551121 (1985-11-01), Nagano

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