Multistage sprocket assembly for a bicycle

Details Multistage sprocket assembly for a bicycle Multistage sprocket assembly for a bicycle

1995-09-26

1997-11-25

Schoeppel, Roger J.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

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

474160, 474164, B62M 1102

Patent

active

056905700

ABSTRACT:
A sprocket assembly includes a larger diameter sprocket having a plurality of teeth formed on an outer periphery thereof, and a smaller diameter sprocket having a plurality of teeth formed on an outer periphery thereof. A driving chain meshes with the plurality of teeth of the smaller diameter sprocket and is able to shift from a first center of a space defined between the teeth of one pair of adjacent teeth located at the smaller diameter sprocket to a second center of a space defined between the teeth of one pair of adjacent teeth located at the larger diameter sprocket. A distance between the first and second centers is made not equal to an integer multiple of the pitch of the driving chain such that the driving chain is bent between the first and second centers and is deflected from a moving direction thereof which is along a tangent line drawn from the first center of the smaller diameter sprocket, and such that the driving chain has a deflection point relative to the first and second centers.

REFERENCES:
patent: 4268259 (1981-05-01), Segawa et al.
patent: 4348200 (1982-09-01), Terada
patent: 5078653 (1992-01-01), Nagano
patent: 5085621 (1992-02-01), Nagano
patent: 5087226 (1992-02-01), Nagano
patent: 5123878 (1992-06-01), Nagano
patent: 5162022 (1992-11-01), Kobayashi
patent: 5188569 (1993-02-01), Kobayashi
patent: 5192250 (1993-03-01), Kobayashi

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