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:
Jul. 30, 2002
Filed:
Mar. 17, 2000
Kanetsugu Tsurutani, Mie, JP;
Chikara Katagiri, Mie, JP;
NTN Corporation, Osaka, JP;
Abstract
A thrust ball bearing includes a pair of races that make an eccentric revolving motion relative to each other. The races are formed with a plurality of opposed annular raceway grooves defined by an outer edge and an inner edge. Balls are received in the respective opposed pairs of raceway grooves. Each of the raceway grooves has a groove bottom pitch circle diameter that is smaller than the amount of offset. The height of the inner edge from the bottom of the groove is set at a predetermined value, and the height of the outer edge from the bottom of the groove is set to be larger than the height of the inner edge from the bottom of the groove. This arrangement prevents the contact ellipse of the ball from riding over the outer edge of the groove.