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. 16, 1990
Filed:
Mar. 21, 1990
Applicant:
Inventors:
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
384492 ; 384527 ; 384531 ; 3849071 ;
Abstract
A heat-resistant ball bearing comprising inner and outer races made of a heat-resistant steel, a plurality of balls made of a ceramic, and a crown retainer made of graphite. Preferably, the retainer has a crown shape and comprises a plurality of projections forming a pocket and a cut-away portion connected to the pocket. The width of the cut-away portion is selected to be about 97 to 99% of the diameter of the ball.