Multi-stage sprocket assembly for bicycle

Details Multi-stage sprocket assembly for bicycle Multi-stage sprocket assembly for bicycle

1991-02-19

1992-02-04

Bui, Thuy M.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

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

F16H 900

Patent

active

050856219

ABSTRACT:
A multi-stage sprocket assembly for a bicycle, having a larger sprocket and a smaller sprocket attached adjacent to each other. The larger sprocket has a concave portion defined in a side face thereof opposite to the smaller sprocket. The concave portion is configurated along a moving path of an intefering plate portion of a drive chain shifting from the smaller sprocket to the larger sprocket, the interfering plate portion being positioned forwardly in a drive rotation direction of the sprocket assembly relative to an engagement-leading plate portion of the chain which first engages a tooth of the larger sprocket.

REFERENCES:
patent: 3478614 (1969-11-01), Shimano
patent: 4181033 (1980-01-01), Nagano
patent: 4268259 (1981-05-01), Segawa et al.
patent: 4348200 (1982-09-01), Terada
patent: 4773893 (1988-09-01), Su et al.

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