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. 14, 2008
Filed:
Nov. 12, 2004
Kouji Ueda, Kanagawa, JP;
Tohru Ueda, Kanagawa, JP;
Kouji Ueda, Kanagawa, JP;
Tohru Ueda, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A roughness of an outer ring raceway surfaceformed on an inner peripheral surface of an outer ringis made larger than a roughness of inner ring raceway surfacesof an inner ring. Also, an average roughness Ra of the outer ring raceway surfaceis set within 0.1 μm≦Ra≦0.5 μm in an axial direction and a circumferential direction in ranges of b/(B/2)≦0.9, b/ (B/2)≦0.9 and in a measured length of 0.1 mm to 1.0 mm where B is a width of the outer ringand b, bare a distance from both end surfaces of the outer ringin the axial direction respectively. A roughness parameter S of the outer ring raceway surface is set within 0<S≦20 μm.