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:
Dec. 02, 2003
Filed:
Sep. 07, 2001
Xavier-Pierre Aitcin, St-Hyacinthe, CA;
Bombardier Inc., Valcourt, CA;
Abstract
A pulley system for use in a constant variable transmission includes a pair of pulley sheaves or flanges mechanically linked by a belt so that the outer surfaces of the belt interact with the inner surfaces of the flanges. At least one of the pulley flanges has an inclined inner surface disposed at an angle that changes progressively based on a curve have a variable radius. For example, the sheave angle can change progressively from 9 degrees to 12 degrees or from 12 degrees to 14 degrees, with no sharp or stepped edges. The belt can have a complementary angled surface also. The progressively variable angle allows the flange surface to more closely match the side surface of the belt, which can increase the belt life be reducing stress experienced by the belt. The pulley system is useable in a transmission for a vehicle, for example a snowmobile or an all terrain vehicle.