Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including belt shiftable axially from one to another surface...
Patent
1997-05-15
1998-11-17
Hannon, Thomas R.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including belt shiftable axially from one to another surface...
411353, 411539, F16H 900, F16B 2118
Patent
active
058368442
ABSTRACT:
A rear derailleur for a bicycle is disclosed herein which basically includes a derailleur body which is coupled to the frame of a bicycle via a bracket axle assembly, and a chain guide assembly which is movably coupled to the derailleur body and engages the chain for moving the chain between the rear gears or sprockets. The bracket axle assembly includes a fixing bolt for pivotally securing the derailleur body to the frame of the bicycle. The bracket axle assembly also includes a torsion spring and a stop plate for controlling the rotational movement of the derailleur body relative to the frame and for normally biasing the derailleur body in a clockwise direction. A retaining assembly having a locking ring and a fixing member is utilized for maintaining the torsion spring and the stopper plate in the desired position on the shaft of the fixing bolt. The locking ring is preferably a two-piece construction and includes first and second substantially identical portions. Each of the portions of the locking ring has an inwardly extending flange which engages a retaining groove in the fixing bolt and a second axially extending flange which protects the shoulder of the fixing bolt. The fixing member has a center opening which frictionally retains the two portions of the locking ring within the groove of the fixing bolt.
REFERENCES:
patent: 2894425 (1959-07-01), Rapata
patent: 4637809 (1987-01-01), Nagano
patent: 4690663 (1987-09-01), Nagano
patent: 4692131 (1987-09-01), Nagano
patent: 4838837 (1989-06-01), Testa
patent: 5498211 (1996-03-01), Hsu
Shimano Europa; Small Parts List for After Market; Shimano XTR Rear Derailleur (8-speed) RD-M950; one page; 1996.
Standard Handbook of Fastening and Joining; Editor--Robert O. Parmley, P.E.; 38 pp., including pp. 3-2-3-37; 1977.
Hannon Thomas R.
Shimano Inc.
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