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. 27, 1996
Filed:
Aug. 29, 1994
Applicant:
Inventors:
Hiroshi Tsujimura, Hitachi, JP;
Yasumasa Tamai, Hitachi, JP;
Masayuki Kurihara, Hitachi, JP;
Seiichi Toyoda, Hitachi, JP;
Yutaka Watanabe, Kitaibaraki, JP;
Koichi Kurosawa, Hitachi, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Kyowa Kogyo Co, Ltd., Ibaraki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148522 ; 148526 ; 148529 ; 148524 ;
Abstract
By applying spot welding along a crack which has occurred in an austenitic stainless steel structure without use of welding material so that spot welds are connected, melting and solidifying of the crack can be achieved, thereby to provide a metal structure which is rich with delta ferrite of the austenitic stainless steel structure or prevent propagation of the crack by enclosing it into the interior of the austenitic stainless steel structure.