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:
Aug. 28, 2001
Filed:
May. 26, 1999
Takaaki Ikeda, Nara, JP;
Tetsuaki Numata, Kitakatsuragi-gun, JP;
Michiyuki Kamiji, Osaka, JP;
Hiroyuki Maeda, Osaka, JP;
Other;
Abstract
A method for manufacturing a one-way clutch cage allows slits of the cage to be formed with a short punching distance, wherein the slits are narrow in width and the cage is less prone to deformation. In this method for manufacturing a one-way clutch cage, after slits,have been formed, windows,are formed and then an outer annular part,is cut. Therefore, since the slits can be formed in a cylindrical member,that has not yet been subjected to the window formation process of the outer annular part cut-out process, and that is sufficiently strong, a radially diagonal punching operation can be performed to form the slits. During this radially diagonal punching operation, a boundary portion between a cylindrical portion,and an outer flange,is punched out from an inside of the cylindrical member toward an outside of the cylindrical member. Thus, the punching distance can be shortened, the punching die can be thinned in thickness and the slit width can be reduced, as compared with horizontal punching.