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:
Nov. 22, 2022
Filed:
Apr. 15, 2020
Nippon Steel Nisshin Co., Ltd., Tokyo, JP;
Nippon Steel Nisshin Pipe Co., Ltd., Tokyo, JP;
Kouji Omosako, Tokyo, JP;
Makoto Akiduki, Tokyo, JP;
Shigenobu Igawa, Aichi, JP;
Yasumasa Makihara, Aichi, JP;
Ryota Tanaka, Aichi, JP;
Nippon Steel Nisshin Co., Ltd., Tokyo, JP;
Nippon Steel Nisshin Pipe Co., Ltd., Tokyo, JP;
Abstract
A method for manufacturing an electric resistance welded metal pipe by butting side ends of a metal strip against each other and then welding the side ends by high frequency heating to manufacture an electric resistance welded metal pipe, each side end being provided with an inner surface side corner portion located on an inner surface side of the electric resistance welded metal pipe, the method includes a step of forming an inclined surface at the inner surface side corner portion before butting the side ends of the metal strip, and wherein the side ends are butted and welded to each other such that the inclined surface remains on an excess metal of the metal pipe after electric resistance welding and a discharged metal is not welded to the excess metal.