The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2009
Filed:
Dec. 03, 2002
Jorma J. Lehtovaara, Etobicoke, CA;
Jacek Stepniak, Innisfil, CA;
Marek Frankowski, Stroud, CA;
Mats K. Lipowski, Toronto, CA;
Richard A. Forrest, Cookstown, CA;
Jorma J. Lehtovaara, Etobicoke, CA;
Jacek Stepniak, Innisfil, CA;
Marek Frankowski, Stroud, CA;
Mats K. Lipowski, Toronto, CA;
Richard A. Forrest, Cookstown, CA;
Litens Automotive, Woodbridge, Ontario, CA;
Abstract
A tensioner () features a backstop device () which allows free rotation of the pivot arm () in one direction but not the other. Reverse rotation is prevented by friction that is able to resist torque on the pivot arm () under ordinary operating conditions which otherwise could permit belt tooth-skip to occur. In disclosed embodiments, the backstop device () includes a stop sleeve () and a clamp holder () which are axially interlocked and are able to rotate relative to each other. A clutch spring () surrounds permits relative rotation between the stop sleeve () and the clamp holder () in one direction but not the other. A clamp () retained within the clamp holder () frictionally engages the pivot shaft. A viscous coupling may be used in place of the frictional clamp.