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:
Sep. 09, 2008
Filed:
May. 28, 2004
Yutaka Miyamoto, Hamura, JP;
Takao Minagawa, Hamura, JP;
Shinichi Inagaki, Hamura, JP;
Kiyoyuki Fukui, Amagasaki, JP;
Yutaka Miyamoto, Hamura, JP;
Takao Minagawa, Hamura, JP;
Shinichi Inagaki, Hamura, JP;
Kiyoyuki Fukui, Amagasaki, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Kikuchi Co., Ltd., Tokyo, JP;
Abstract
A butt welding apparatus and a butt welding method where end faces of at least one plate member to be welded are butted to each other to form a butt portion, and butt welding can be performed on respective plate members which have various thickness sizes on both side portions of the butt portion with electric resistance heat by a pair of electrode members which are common to the respective plate members. At least one electrode member () is provided on an outer face thereof with a convex portion (A) which gradually retreats from one plate member () of two plate members () as it extends from an intermediate portion, in a thickness direction, of the one electrode member () along the one plate member (). Butt welding of the two plate members () is performed by the position of the butting portion () of these plate members () being offset from the intermediate portions, in the thickness directions, of the electrode members () to the convex portion (A) by an amount (L) corresponding to a difference in thickness between the plate members ().