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:
Sep. 03, 2002
Filed:
Jun. 27, 2000
Takashi Nogi, Fujisawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A cage for use in a roller bearing having a plurality of bar portions arranged circumferentially and a pair of circular portions connecting both axial ends of the plurality of bar portions. A circular portion having a larger or equal diameter, in the pair of the circular portions, is referred to as a circular portion, the other of them is referred to as a second circular portion, and it is designed to provide, for example, such a relation as: 0.8≦(I /I )≦1.4, and 0.1≦(I /I )≦3.0 in which the moment of inertia of area for the circular portion is I , the moment of inertia of area for the second circular portion is I , and the moment of inertia of area for the bar portion is I . This enables to improve the strength of the cage without lowering the load capacity of the bearing to which the cage is assembled.