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:
Oct. 30, 2007
Filed:
Feb. 20, 2004
Seigo Nishikawa, Fukuoka, JP;
Seiichiro Fukushima, Fukuoka, JP;
Tsuneo Shinada, Kanagawa, JP;
Kiyoshi Naito, Kanagawa, JP;
Seigo Nishikawa, Fukuoka, JP;
Seiichiro Fukushima, Fukuoka, JP;
Tsuneo Shinada, Kanagawa, JP;
Kiyoshi Naito, Kanagawa, JP;
Hitachi Via Mechanics, LT, Kanagawa, JP;
Kabushiki Kaisha Yasakawa Denki, Fukuoka, JP;
Abstract
An arc welder comprising: a rectifier circuitwhich rectifies an alternating currentto a direct current; an inverter circuit; a transformer; a second rectifier circuitwhich rectifies an output of the transformerto a direct current; and a first reactorwhich is connected to the second rectifier circuit. The arc welder further has a current circuitwhich is connected in parallel to the second rectifier circuitwith a reactance that is larger than the reactance of the first reactor