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:
Jan. 03, 2006
Filed:
Dec. 19, 2003
Minoru Yamada, Yokohama, JP;
Akio Tejima, Yokosuka, JP;
Minoru Yamada, Yokohama, JP;
Akio Tejima, Yokosuka, JP;
Abstract
A TIG welding apparatus comprises; a twin electrode type welding torchhaving a first and a second welding electrodearranged approximately parallel and either side of an insulation plate of a predetermined thickness, and a main unitwhich supplies to the first welding electrodea first welding current varied at a first period F, and to the second welding electrodea second welding current varied at the first period F and at an opposite phase to the variation of the first welding current. The main unitsuperimposes a variation of a second period fm being shorter than the first period F, onto the first and second welding currents. As a result, the arc current is increased without increasing the welding current.