Derailleur for a bicycle

Details Derailleur for a bicycle Derailleur for a bicycle

1984-02-14

1986-09-09

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...

F16H 722

Patent

active

046106448

ABSTRACT:
A derailleur for a bicycle comprises; a fixing member; a transformable linkage mechanism comprising a base member, two linkage members and a movable member; and a chain guide having a guide pulley and a tension pulley. The linkage mechanism is supported swingably to the fixing member in the relation that the guide pulley reciprocates away from or toward the axis of the sprocket assembly. The derailleur is provided between the chain guide and the movable member with a first spring, between the fixing member and the linkage mechanism with a second spring for biasing the guide pulley away from the axis of sprocket assembly, and with a forcibly moving mechanism which moves the chain guide axially of the sprocket assembly and also radially thereof in a plane perpendicular to the axis of the sprocket assembly.

REFERENCES:
patent: 3181383 (1965-05-01), Juy
patent: 3973447 (1976-08-01), Nagano
patent: 4027542 (1977-06-01), Nagano

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