Title:
RANDOM ENGAGEMENT ROLLER CHAIN SPROCKET WITH STAGED MESHING AND FLANK RELIEF TO PROVIDE IMPROVED NOISE CHARACTERISTICS
Document Type and Number:
WIPO Patent Application WO1998029673
Kind Code:
A3
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. 00000
Inventors:
YOUNG JAMES D
Application Number:
PCT/US1997/023429
Publication Date:
September 11, 1998
Filing Date:
December 18, 1997
Export Citation:
Assignee:
CLOYES GEAR & PRODUCTS INC (US)
International Classes:
F16H7/06; F16H55/30; F16H57/00; (IPC1-7): F16H/
Foreign References:
| US4738653A | 1988-04-19 | |||
| US4116081A | 1978-09-26 | |||
| US3752035A | 1973-08-14 | |||
| US4016772A | 1977-04-12 | |||
| US5318483A | 1994-06-07 | |||
| US3495468A | 1970-02-17 |
Other References:
See also references of EP 0944787A4
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