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. 16, 2010
Filed:
Jan. 11, 2006
Applicants:
Kousuke Obayashi, Iwata, JP;
Yasuyuki Watanabe, Iwata, JP;
Inventors:
Kousuke Obayashi, Iwata, JP;
Yasuyuki Watanabe, Iwata, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 33/58 (2006.01);
U.S. Cl.
CPC ...
Abstract
Manufactured by quench hardening, a bearing washer for a thrust bearing inexpensive and excellent in durability is used without being subjected to grinding after quenching. In a bearing washer group including a plurality of bearing washers for the thrust bearing, when camber/waviness of each bearing washer constituting the bearing washer group that is randomly extracted is measured, a value obtained by adding a value three times as large as standard deviation of camber/waviness to an average value thereof is at most 40 μm.