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:
Mar. 22, 2005
Filed:
May. 09, 2000
Shigeru Okita, Yokohama, JP;
Kazuo Sekino, Ashigara-kami-gun, JP;
Toyohisa Yamamoto, Fujisawa, JP;
Susumu Tanaka, Yokohama, JP;
Hiroyuki Ito, Chigasaki, JP;
Akira Uchida, Ashigara-kami-gun, JP;
Kazuhiro Fujiu, Yokohama, JP;
Shigeru Okita, Yokohama, JP;
Kazuo Sekino, Ashigara-kami-gun, JP;
Toyohisa Yamamoto, Fujisawa, JP;
Susumu Tanaka, Yokohama, JP;
Hiroyuki Ito, Chigasaki, JP;
Akira Uchida, Ashigara-kami-gun, JP;
Kazuhiro Fujiu, Yokohama, JP;
NSK Ltd., Tokyo, JP;
Abstract
A full complement angular ball bearing with no cage and having a contact angle from 10 to 45° and an increased number of balls for use under severe conditions. The life is extended by defining the surface roughness of the inner ring and the outer ring, defining the roughness ratio of them relative to the rolling element, defining the Cr content in the alloy steel for the rolling element, forming the rolling element with oxide ceramics, or providing a dense nitride layer on the surface of the rolling element, avoiding the presence of particles with a mean diameter in excess of 3 μm on the raceway surfaces of the outer ring and the inner ring, or coating a film of a hardness higher than that of the raceway surface of the outer ring and the inner ring on the surface of the rolling element.