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:
Mar. 03, 2015
Filed:
Apr. 10, 2012
Tomohiro Kudou, Takasaki, JP;
Kazuto Kobayashi, Fujisawa, JP;
Keiichi Horino, Fujisawa, JP;
Kiyoshi Ootsuka, Fujisawa, JP;
Isao Shintou, Fujisawa, JP;
Tomohiro Kudou, Takasaki, JP;
Kazuto Kobayashi, Fujisawa, JP;
Keiichi Horino, Fujisawa, JP;
Kiyoshi Ootsuka, Fujisawa, JP;
Isao Shintou, Fujisawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A method of manufacturing a drawn cup needle roller bearing having a seal ring, including forming the seal ring by a press working by: punching a metal plate to form an annular first intermediate material; subjecting the first intermediate material to burring working such that a portion close to an inner diameter of the first intermediate material is bent in an axial direction at a right angle to form an annular second intermediate material having an L-shaped cross section, the second intermediate material comprising a cylindrical portion and an outward flange portion which is bent radially outward from an axial end portion of the cylindrical portion; removing the outward flange portion to form a cylindrical third intermediate; and subjecting the third intermediate material to cold rolling working to regulate an inner diameter, an outer diameter and a cross sectional shape of the third intermediate material.