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:
Jan. 16, 2001
Filed:
Feb. 04, 1999
Applicant:
Inventors:
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16C 3/332 ;
U.S. Cl.
CPC ...
F16C 3/332 ;
Abstract
There is provided a rolling bearing which is capable of reducing vibrations and noise while satisfying requirements of high-speed rotation and prolonged life of grease. Balls are formed of a ceramic material whose major component is zirconia and which has a Young's modulus of 250 GPa or lower. The zirconia content of the ceramic material is not less than 80 wt %. The ceramic material is sintered by HIP. The balls are low in Young's modulus, allowing the contact surface pressure between rolling element and raceway to be lowered, so that the bearing can be reduced in vibrations and noise. Also, the bearing is high in durability because of HIP sintering.