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:
Aug. 15, 2000
Filed:
Sep. 09, 1998
Applicant:
Inventor:
Tsugito Nakazeki, Kuwana, JP;
Assignee:
NTN Corporation, Osaka-Fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ; F16C / ;
U.S. Cl.
CPC ...
474199 ; 474903 ; 384523 ;
Abstract
A ball bearing cage fitted in a pulley main body having peripheral surface to be contacted by a belt. The pulley bearing includes a raceway surface and grease. The cage has pockets for receiving balls which are circumferentially disposed with unequal pitch such that when some of the vibrating balls impart channeling to the grease on the raceway surface, the other balls ride on the grease on the raceway surface. This suppresses or prevents the occurrence of cold peculiar sound.