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. 01, 2006
Filed:
Nov. 01, 2004
Shinichi Ezaka, Kariya, JP;
Satoshi Sugiyama, Toyohashi, JP;
Tomohiro Matsuura, Iwata, JP;
Takafumi Watanabe, Iwata, JP;
Tatsuya Ito, Iwata, JP;
Nobuhisa Tako, Iwata, JP;
Shinichi Ezaka, Kariya, JP;
Satoshi Sugiyama, Toyohashi, JP;
Tomohiro Matsuura, Iwata, JP;
Takafumi Watanabe, Iwata, JP;
Tatsuya Ito, Iwata, JP;
Nobuhisa Tako, Iwata, JP;
Denso Corporation, Kariya, JP;
Nihon Pakkin Co., Ltd., Iwata-gun, JP;
Abstract
It is an object of the present invention to provide a method of manufacturing a cylindrical part with a thin-walled portion at a lower cost, and according to the manufacturing method of the present invention, a base metal formed with thin-walled portion adjacent to its closed end can be easily detached from working jigs. According to the method, a thin-walled portion is at first formed by the ironing process on a cylindrical wall adjacent to the closed end, so that an outer-side step portion is formed on an outer peripheral surface of the cylindrical wall. Then the closed end is punched out and the thin-walled portion is enlarged in a radial and outward direction to form an inner-side step portion on an inner peripheral surface of the cylindrical part.