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:
Aug. 24, 2004
Filed:
Jul. 08, 2002
Applicant:
Inventors:
Yasuharu Misada, Kashiwara, JP;
Masao Goto, Habikino, JP;
Yasuo Asai, Kashiwara, JP;
Yoshihiro Ono, Gose, JP;
Teruo Hoshino, Yao, JP;
Adrian P. Lee, Leyland, GB;
Jonathan Newall, Leyland, GB;
Assignee:
Koyo Seiko Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 1/538 ;
U.S. Cl.
CPC ...
F16H 1/538 ;
Abstract
For extension of service lives of rollers and discs of a toroidal continuously variable transmission, input discs, output discs and rollers are formed of a heat-resisting bearing steel. At least a roller has its peripheral surface subjected to a shot peening for achieving a compressive residual stress of 0.6 to 1.2 GPa and a hardness of HRC 63 to 66 at the outermost surface.