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. 02, 2003
Filed:
Jul. 30, 1997
Dai Kinno, Kanagawa, JP;
Koichi Hachiya, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A rolling apparatus has a surface-treated rolling member composed of a metallic rolling element and a metallic race element which have been used with a lubricant, in which the surface of at least one of the rolling element and the race element has a reaction product subsurface layer containing phosphorus and oxygen and having a thickness of from about 30 to 600 nm, where the reaction product subsurface layer has been produced by reaction between the metallic component of the rolling element or the race element and an organic phosphorus compound. The lubricant contains, as an extreme pressure component, an organic phosphorus compound; the lubricant contains the organic phosphorus compound at a concentration of 10 to 10,000 ppm in terms of phosphorus; and the lubricant is present between the metallic contact surfaces of the rolling member and the race element.