Endless belt power transmission systems or components – Positive drive pulley or guide roll – With particular belt
Patent
1999-03-26
1999-12-07
Graysay, Tamara L.
Endless belt power transmission systems or components
Positive drive pulley or guide roll
With particular belt
474212, 474231, F16H 706, F16G 1304, F16G 1302
Patent
active
059974249
ABSTRACT:
A random engagement roller chain sprocket for use primarily in automotive engine chain drive applications which incorporates different asymmetrical tooth profiles for improved noise reduction. In particular, the sprocket includes a number of first teeth each having a first engaging flank and a first disengaging flank, and a number of second teeth each having a second engaging flank and a second disengaging flank. One of the first engaging flanks cooperating with one of the first disengaging flanks or the second disengaging flanks of a first adjacent tooth to define a first asymmetrical tooth space for receiving a roller of an associated roller chain. The first asymmetrical tooth space including a first root surface between the one of the first engaging flanks and the first disengaging flanks or the second disengaging flanks. The first root surface being adapted for contacting a roller of an associated roller chain during rotation of the sprocket. One of the second engaging flanks cooperating with one of the first disengaging flanks or the second disengaging flanks of a second adjacent tooth to define a second asymmetrical tooth space for receiving a roller of an associated roller chain. The second asymmetrical tooth space including a second root surface between the one of the second engaging flanks and the first disengaging flanks or the second disengaging flanks. The second root surface being spaced from a roller of an associated roller chain so as to define a clearance therebetween during rotation of the sprocket.
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Cloyes Gear and Products, Inc.
Graysay Tamara L.
Kaness Matthew A.
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