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:
Apr. 19, 1977
Filed:
Jan. 29, 1975
Applicant:
Inventors:
Minoru Oishi, Fujisawa, JA;
Masaharu Rokujo, Kobe, JA;
Hisaaki Yokota, Chigasaki, JA;
Naoki Okuda, Kamakura, JA;
Makoto Tomita, Yokohama, JA;
Toshihiko Endo, Kamakura, JA;
Assignee:
Kobe Steel Ltd., Kobe, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
2191 / ; 219 75 ;
Abstract
The narrow gap butt welding of aluminum and aluminum alloy plates of a thickness more than 20 mm with a non-consumable electrode is conducted by inserting a filling material into a welding groove, applying a direct current of more than 300 A between said non-consumable electrode which does not have a sharp end and said plates to be welded with straight polarity, maintaining an arc length from 0.5 to 5 mm and shielding the welding groove area with a shielding gas comprising at least 50% helium.