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. 14, 2003
Filed:
Nov. 29, 2000
Applicant:
Inventors:
Masazumi Kobayashi, Shizuoka, JP;
Masayuki Tanio, Shizuoka, JP;
Takao Maeda, Shizuoka, JP;
Takuya Katou, Shizuoka, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 3/224 ;
U.S. Cl.
CPC ...
F16D 3/224 ;
Abstract
A cage having a plurality of pockets, and a pair of end faces of each pocket formed in the cage that oppose each other in a circumferential direction of the cage are formed by surfaces cut after hardening and their surface hardness is reduced to a value lower than the surface hardness of a pair of side faces of each pocket that oppose each other in an axial direction of the cage to impart toughness to the bridge portions defined between the pockets and thus to increase the strength of the cage.