Multiple sprocket assembly for a bicycle

Details Multiple sprocket assembly for a bicycle Multiple sprocket assembly for a bicycle

1996-09-06

2000-08-15

Hannon, Thomas R.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

And additional coaxial surface for engaging same belt in...

474164, F16H 5512

Patent

active

061028215

ABSTRACT:
A multiple sprocket assembly includes one or more sprocket subassemblies. Each sprocket subassembly includes a spider-type sprocket support which supports first and second sprockets. The sprocket support includes a boss and a plurality of supporting arms extending radially outward from the boss. Each supporting arm includes a first mounting surface and a second mounting surface opposite the first mounting surface in an end region of the supporting arm. The first sprocket is mounted to the first mounting surface of each supporting arm, and the second sprocket is mounted to the second mounting surface of each supporting arm. A difference between a number of teeth on the first sprocket and a number of teeth on the second sprocket is small, e.g., from one to three teeth. A fastening means in the form of an attachment pin which extends through a first sprocket opening in the first sprocket, a second sprocket opening in the second sprocket, and an attachment opening in a corresponding supporting arm fastens the first sprocket and the second sprocket to the respective first mounting surface and second mounting surface. One or more third sprockets may be disposed in a row with the first sprocket and the second sprocket.

REFERENCES:
patent: 3919898 (1975-11-01), Sugino
patent: 4150859 (1979-04-01), Segawa et al.
patent: 4348200 (1982-09-01), Terada
patent: 4790554 (1988-12-01), Siegwart, Jr.
patent: 4869710 (1989-09-01), Iwasaki
patent: 4889521 (1989-12-01), Nagano
patent: 5194051 (1993-03-01), Nagano
patent: 5246402 (1993-09-01), Romano
patent: 5503600 (1996-04-01), Berecz
patent: 5545096 (1996-08-01), Su
Shimano Bicycle Systems Components, vol. 1, No. 2, p. 90, dated Mar. 1983.

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