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. 12, 2009
Filed:
Sep. 10, 2002
Kenji Yakura, Kanagawa, JP;
Takaaki Anzai, Kanagawa, JP;
Ken Inaba, Kanagawa, JP;
Yasushi Morita, Kanagawa, JP;
Kenji Yakura, Kanagawa, JP;
Takaaki Anzai, Kanagawa, JP;
Ken Inaba, Kanagawa, JP;
Yasushi Morita, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A cylindrical roller bearing with synthetic resin cages, in which heat generation of the bearing during high speed rotation is suppressed, while sufficient rigidity and strength is secured, so that the bearing is excellent in high speed performance. The cylindrical roller bearing () has synthetic resin cages () each including an annular portion () disposed in one axial end portion of the cage (), and a plurality of columnar portions () extending from a side surface of the annular portion (). The minimum inner diameter d1 of the annular portion () is set to be smaller than the maximum inner diameter d2 of each columnar portion (), and the inner diameter of the columnar portion () is set to be equal to the inner diameter d1 of the annular portion () over a range of length not longer than ⅔ of the whole length of the columnar portion ().