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:
May. 05, 2015
Filed:
Jun. 14, 2012
Chiharu Ito, Kuwana, JP;
Hikaru Ishida, Kuwana, JP;
Chiharu Ito, Kuwana, JP;
Hikaru Ishida, Kuwana, JP;
NTN Corporation, Osaka, JP;
Abstract
A retainer of synthetic resin is provided in such a way that abnormal heat generation in a bearing and wear of the retainer due to interference between the retainer and balls are less likely to arise while the bearing is rotating at a high speed. A retainer () of synthetic resin includes two annular members () made of synthetic resin and facing each other in the axial direction, the annular members defining therebetween a plurality of circumferentially spaced apart pockets () in which respective balls () are received. Concave spherical surfaces () are formed at the circumferential ends of the respective pockets () so as to extend along the outer peripheries of the balls (), and cylindrical surfaces () are formed at the axial ends of the respective pockets ().