Random engagement roller chain sprocket with staged meshing and

Details Random engagement roller chain sprocket with staged meshing and Random engagement roller chain sprocket with staged meshing and

1997-12-17

1999-07-13

Jeffery, John A.

Endless belt power transmission systems or components

Positive drive belt

474205, 474156, F16H 706, F16G 128

Patent

active

059218797

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 first plurality of sprocket teeth each having a first tooth profile including a first engaging flank, a first engaging root, and a first flat positioned between the first engaging flank and first engaging root wherein a first roller initially contacts the first flat at the onset of the first roller meshing with the sprocket. The sprocket also includes a second plurality of sprocket teeth each having a second tooth profile different from the first tooth profile and including a second engaging flank, a second engaging root, and a second flat tangent to the second engaging root remote from the second engaging flank wherein a second roller initially contacts the second flat at the onset of meshing between the second roller and the sprocket.

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