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. 18, 1987
Filed:
May. 29, 1985
Tadao Koga, Kisarazu, JP;
Mitsuru Sugimori, Yokohama, JP;
Masanori Terasaki, Yokohama, JP;
Tsukasa Maenosono, Yokohama, JP;
Satoru Tsushima, Yokohama, JP;
Kazuo Yoshida, Yokohama, JP;
Tetsusho Kuriwaki, Yokohama, JP;
Miharu Hirado, Yokohama, JP;
Daiichi Koshuha Kogyo Kabushiki Kaisha, Tokyo, JP;
Ishikawajima-Harima Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A heating method and apparatus for effecting the residual-stress-relief treatment of a welded joint in a pipe line. A welded joint between main pipes, between a main pipe and a branch pipe, between a main pipe and a pipe base or between a branch pipe and a pipe seat and a portion adjacent to the welded point are uniformly or substantially uniformly heated by an inductor which can be varied into configurations according to the performance of the welded joint. The problems encountered in the conventional residual-stress-relief treatment can be substantially overcome.