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:
May. 17, 2022
Filed:
Aug. 12, 2016
Applicant:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Inventors:
Yasuyoshi Hidaka, Tokyo, JP;
Yasuto Higashida, Tokyo, JP;
Yuichi Yamanari, Tokyo, JP;
Yuji Yamamoto, Tokyo, JP;
Tatsuya Miyai, Tokyo, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21B 25/00 (2006.01); C22C 38/04 (2006.01); C21D 6/00 (2006.01); C21D 9/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
B21B 25/00 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C21D 9/0068 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/52 (2013.01); C21D 9/00 (2013.01); C21D 2211/001 (2013.01); C22C 38/00 (2013.01); C22C 38/54 (2013.01);
Abstract
A piercer plug with increased life and a method of manufacturing it are provided. The piercer plugincludes a tip portionand a trunk portionmade of the same material as the tip portionand continuous to the tip portion. The trunk portionincludes a cylindrical portionhaving a hole used for attaching a bar. The tip portionis harder than the cylindrical portion