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:
Apr. 30, 1991
Filed:
Jul. 19, 1990
Yasuo Murakami, Fujisawa, JP;
Yoichi Matsumoto, Fujisawa, JP;
Shinjiro Ishii, Fujisawa, JP;
Ryurou Kurahashi, Muroran, JP;
Mitsuru Nakamura, Muroran, JP;
Nippon Seiko Kabushiki Kaisha, Tokyo, JP;
Abstract
A rolling bearing, in which at least one of the races and a rolling element of the rolling bearing is made of a raw steel which is free from a Al.sub.2 O.sub.3 or an Al.sub.2 O.sub.3 -base inclusion particle with a 13 .mu.m or more average particle size; but which includes 80 or less Al.sub.2 O.sub.3 or Al.sub.2 O.sub.3 -base inclusion particles with a 3 .mu.m or more average particle size for each tested area of 165 mm.sup.2. The rolling bearing provides a very long life rolling bearing even under the severe conditions of a high bearing, the presence of a deflection in a bearing housing, defective lubrication, etc.