Endless belt power transmission systems or components – Positive drive pulley or guide roll – And additional coaxial surface for engaging same belt in...
Patent
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.
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patent: 5759124 (1998-06-01), Sung
Lin Hsi-Fu
Sung Cheng-kuo
Yu Kuo-Hung
Bucci David A.
Kaness Matthew A.
National Science Council
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