Endless belt power transmission systems or components – Positive drive pulley or guide roll – Having nonmetallic component
Reexamination Certificate
2008-05-13
2008-05-13
Charles, Marcus (Department: 3682)
Endless belt power transmission systems or components
Positive drive pulley or guide roll
Having nonmetallic component
C156S160000
Reexamination Certificate
active
11481678
ABSTRACT:
A sprocket includes a hub and a plurality of teeth projecting radially outwardly from the hub. At least one cushion ring is located adjacent the teeth, and the cushion ring defines a plurality of compression pads separated from each other by transverse grooves. Each of the compression pads is defined symmetrically about a circumferential mid-point. When part of a sprocket with symmetric tooth spaces, the cushion ring is being operable identically in first and second opposite rotational directions. In one arrangement, the compression pads each include a planar outer surface having a leading and a trailing end, wherein the leading end and trailing end are located a common radial distance from a center of the hub about which the sprocket rotates. The tooth spaces of the sprocket can be symmetric, asymmetric and the root surface can be relieved. The sprocket can include multiple tooth profiles distributed randomly about the hub.
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Young, James D. et al.,Camshaft Roller Chain Drive with Reduced Meshing Impact Noise Levels, 2003-01-1666, SAE International—SAE Technical Paper Series, ISSN 0148-7191, 2003.
Charles Marcus
Cloyes Gear and Products, Inc.
Fay Sharpe LLP
LandOfFree
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