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:
Mar. 29, 2011
Filed:
Feb. 12, 2007
Toyoyuki Satou, Shinagawa-ku, JP;
Koji Nakamura, Shinagawa-ku, JP;
Yutaka Kimura, Shinagawa-ku, JP;
Hidetoshi Fujii, Ibaraki, JP;
Shanping LU, Shenyang, CN;
Kiyoshi Nogi, Ibaraki, JP;
Toyoyuki Satou, Shinagawa-ku, JP;
Koji Nakamura, Shinagawa-ku, JP;
Yutaka Kimura, Shinagawa-ku, JP;
Hidetoshi Fujii, Ibaraki, JP;
Shanping Lu, Shenyang, CN;
Kiyoshi Nogi, Ibaraki, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Abstract
The TIG welding methods of the present invention include generating an electric arc between an electrode and an object to weld the object, wherein a first shielding gas including an inert gas flows toward the welded object surrounding the electrode, a second shielding gas containing an oxidative gas flows toward the welded object along a periphery of the first shielding gas, and the concentration of the oxidative gas in the second shielding gas is set such that the oxygen concentration in the welded metal portion of the welded object is within a range of 70 to 220 wt. ppm.