Rear derailleur for a bicycle

Details Rear derailleur for a bicycle Rear derailleur for a bicycle

1997-12-18

1999-10-05

Graysay, Tamara L.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

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

474 80, F16H 900

Patent

active

059614099

ABSTRACT:
A rear derailleur includes a transformable linkage mechanism including a base member, two linkage members and a movable member. A chain guide is supported to the movable member and is provided with a guide pulley for guiding the chain among the plurality of sprockets. The linkage members are connected to the base member and to the movable member through connecting pins, wherein the connecting pins are slanted with respect to a plane perpendicular to an axis of the plurality of sprockets so that, when the linkage mechanism is transformed, the chain guide moves axially and radially of the plurality of sprockets. A return spring is provided for biasing the chain guide laterally inwardly with respect to the bicycle. A first horizontal shaft swingably supports the base member to a fixing member of the bicycle, and a second horizontal shaft swingably supports the chain guide to the movable member. A first spring is disposed at the base member for biasing the linkage mechanism in a direction of the guide pulley moving away from the axis of the sprocket assembly, and a second spring is disposed between the chain guide and the movable member for applying tension to the chain. The transformable linkage mechanism and first and second springs cooperate together such that the position of the chain guide is forcibly shifted axially and radially of the sprockets by the transformable linkage mechanism, and the shifted position of the chain guide set by the linkage mechanism is radially adjusted with respect to the plurality of sprockets by the balancing of the first and second springs.

REFERENCES:
patent: 3364762 (1968-01-01), Maeda
patent: 3927904 (1975-12-01), Bergles
patent: 4030375 (1977-06-01), Nagano
patent: 4443208 (1984-04-01), Kozakae
patent: 4610644 (1986-09-01), Nagano
patent: 4642072 (1987-02-01), Nagano
patent: 4690663 (1987-09-01), Nagano
patent: 4692131 (1987-09-01), Nagano
patent: 4850940 (1989-07-01), Nagano
patent: 5295916 (1994-03-01), Chattin
patent: 5397273 (1995-03-01), Ando
patent: 5518456 (1996-05-01), Kojima et al.

Affiliated with

Also associated with

Rating

Rear derailleur for a bicycle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rear derailleur for a bicycle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rear derailleur for a bicycle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1163882