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:
Dec. 04, 2012
Filed:
Mar. 24, 2009
Katsunori Wada, Kai, JP;
Katsunori Wada, Kai, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Abstract
An outer gas for plasma welding of the present invention is used in plasma welding of a stainless steel with use of a plasma welding torch in which an insert tip () is provided in the periphery of a tungsten electrode (), a shield cap () is provided in the periphery of this insert tip (), a front end part of the tungsten electrode () is located inside from a front end part of the insert tip (), a center gas comprising an inert gas is allowed to flow into a gap between the tungsten electrode () and the insert tip (), and the outer gas is allowed to flow into a gap between the insert tip () and the shield cap (), wherein the outer gas is a mixed gas containing 0.5 to 2% by volume of a carbon dioxide gas with the balance of an inert gas.