Integrated up-and downshifting configuration of a multistage spr

Details Integrated up-and downshifting configuration of a multistage spr Integrated up-and downshifting configuration of a multistage spr

1997-12-30

2000-04-04

Bucci, David A.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

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

474158, F16H 5512, F16H 5530

Patent

active

060454725

ABSTRACT:
A multistage sprocket assembly for a bicycle comprises at least one larger sprocket and at least one smaller sprocket, in which both side surfaces of the larger sprocket are trimmed off at the positions corresponding to two downshifting paths and two upshifting paths designed for a drive chain when being shifted from the smaller sprocket to the larger sprocket or vice versa. The trim portion is large and deep enough to avoid any interference between the link plates of the chain and the larger sprocket, and to receive therein the link plates of the chain so as to provide a positioning function thereat during the chain shifting process.

REFERENCES:
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patent: 5188569 (1993-02-01), Kobayashi
patent: 5192249 (1993-03-01), Nagano
patent: 5192250 (1993-03-01), Kobayashi
patent: 5409422 (1995-04-01), Feng et al.
patent: 5437582 (1995-08-01), Romano
patent: 5503598 (1996-04-01), Neuer et al.
patent: 5690570 (1997-11-01), Chang et al.
patent: 5716297 (1998-02-01), Bodmer
patent: 5738603 (1998-04-01), Schmidt et al.
patent: 5759124 (1998-06-01), Sung

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