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:
Oct. 02, 2007
Filed:
Oct. 23, 2003
Yucong Wang, West Bloomfield, MI (US);
Beizhi Zhou, Troy, MI (US);
Serge V. Guillot, Sylvania, OH (US);
Robert J. Porter, Clinton, MI (US);
Sohail A. Khan, Farmington, MI (US);
Chester N. Grant, Ortonville, MI (US);
Yucong Wang, West Bloomfield, MI (US);
Beizhi Zhou, Troy, MI (US);
Serge V. Guillot, Sylvania, OH (US);
Robert J. Porter, Clinton, MI (US);
Sohail A. Khan, Farmington, MI (US);
Chester N. Grant, Ortonville, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A pulley engageable with a belt for use in a continuously variable transmission includes first and second pulley halves rotatable about an axis and relatively moveable in a direction of the axis. The pulley halves include truncated conical portions symmetrically opposed to each other and outer surfaces which are axially opposed to each other and sloped relative to the axis. The outer surfaces have a circumferential roughness average (Ra,y) measured in a direction (y) circumferential to the axis between approximately 0.15 and 1.0 micrometer. The outer surfaces have a radial roughness average (Ra,x) measured in a direction (x) radial to the axis, and a ratio Ra,x/Ra,y between approximately 0.5 and 2.5.