Bicycle sprocket having recesses beneath chain receiving edges

Details Bicycle sprocket having recesses beneath chain receiving edges Bicycle sprocket having recesses beneath chain receiving edges

1998-02-04

2000-01-11

Graysay, Tamara L.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

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

474156, 474164, F16H 5512

Patent

active

060130016

ABSTRACT:
A bicycle sprocket includes a sprocket body having a first lateral side surface, a second lateral side surface opposite the first lateral side surface, and an inner peripheral surface. A plurality of teeth extend radially outwardly from the sprocket body and define a corresponding plurality of chain connector receiving spaces with a corresponding plurality of bottom edges between each pair of adjacent teeth, wherein each bottom edge receives a chain connector therein. The first lateral side surface defines a first recess extending radially inwardly from selected ones of the plurality of bottom edges, and the first lateral side surface defines a second recess extending radially inwardly from other selected ones of the plurality of bottom edges and spanning their corresponding pairs of adjacent teeth. The first lateral side surface forming each pair of adjacent teeth corresponding to the other selected ones of the plurality of bottom edges also defines the second recess for facilitating shifting of the chain from a smaller sprocket to a larger sprocket, while the first recesses prevent buildup of contaminants between the sprocket teeth.

REFERENCES:
patent: 4889521 (1989-12-01), Nagano
patent: 5437582 (1995-08-01), Romano
patent: 5503598 (1996-04-01), Neuer et al.
patent: 5503600 (1996-04-01), Berecz
patent: 5514042 (1996-05-01), Liou
patent: 5545096 (1996-08-01), Su

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