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:
Jul. 24, 1979
Filed:
Apr. 29, 1977
Applicant:
Inventors:
Wataru Shimdada, Amagasaki, JP;
Kazumichi Machida, Amagasaki, JP;
Susumu Hoshinouchi, Amagasaki, JP;
Seigo Hiramoto, Amagasaki, JP;
Masaru Okada, Amagasaki, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
2191 / ; 21912512 ; 219 7616 ; 219 75 ; 21913032 ;
Abstract
In a welding apparatus for overlaying on a base metal, a reverse polarity soft plasma arc is formed between an electrode and the base metal and a welding rod is fed into the arc to weld the base metal by melting the welding rod and the feeding speed of the welding rod is controlled corresponding to the arc current to form a bead having low penetration. The electrode is oscillated and an active gas such as CO.sub.2 or O.sub.2 is incorporated in a shield gas at a rate controlled corresponding to the oscillation of the electrode.