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:
Sep. 03, 2013
Filed:
Aug. 17, 2007
Jun Katoh, Kobe, JP;
Hideo Hata, Kobe, JP;
Kenji Yamamoto, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
Disclosed is a pulley capable of meeting requirements for both enhancement in friction coefficient, and maintenance of abrasion resistance, required of a belt CVT (continuously variable transmission). The pulley is a pulley of the continuously variable transmission for effecting power transmission between an element and the pulley, being composed of a steel stock containing a predetermined amount of Mn, wherein the surface of the steel stock has a surface-hardened layer of either a nitriding layer or a carbonitriding layer, containing the predetermined amount of Mn, and the surface-hardened layer has properties for stably securing friction coefficient not lower than 0.115, exceeding the friction coefficient of SCr420H steel currently in use, and maintaining abrasion resistance equivalent to the abrasion resistance of the SCr420H steel, or improving the same.