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:
Feb. 13, 2018
Filed:
Jun. 22, 2015
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Inventor:
Satoru Ochiai, Nagakute, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Nagoya-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K 21/08 (2006.01); H01T 21/02 (2006.01); B21J 5/06 (2006.01);
U.S. Cl.
CPC ...
B21K 21/08 (2013.01); B21J 5/06 (2013.01); H01T 21/02 (2013.01);
Abstract
A method of manufacturing a metal fitting having a tool engagement portion engageable with a tool. The manufacturing method includes a cold forging process, wherein the cold forging process includes: a step (a) of forming a body portion having a first maximum length and a butt portion being continuous to the body portion and having a second maximum length larger than the first maximum length; and a step (b) of drawing at least a part of the butt portion in the axis direction, thereby forming the tool engagement portion.