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:
Apr. 10, 2012
Filed:
Oct. 21, 2004
Takayuki Ohnuma, Sayama, JP;
Takashi Kobayashi, Sayama, JP;
Tsutomu Ando, Sayama, JP;
Hidetaka Hiruma, Sayama, JP;
Ryotaro Takada, Sayama, JP;
Takayuki Ohnuma, Sayama, JP;
Takashi Kobayashi, Sayama, JP;
Tsutomu Ando, Sayama, JP;
Hidetaka Hiruma, Sayama, JP;
Ryotaro Takada, Sayama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
There is provided a method by which a member having an undercut in the inner peripheral portion thereof can be formed readily. To form a material () formed with a recess () and the undercut () by using a swaging device, while the material () is first gripped by a clamper (), and a mandrel () is inserted into the recess () of the material (). The mandrel () used has an outside diameter equal to the inside diameter of a blind hole of an aimed product (fuel injection nozzle). Then, the material () is pushed in by the mandrel () to a position at which the material () abuts on a stopper (), and the outside surface of the material () is struck by swaging dies () to perform a swaging operation. This swaging operation reduces the inside diameter of the recess () to the outside diameter of the mandrel (), with the undercut () left.