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:
Jun. 10, 2008
Filed:
Jun. 21, 2004
Elliott K. Stava, Sagamore Hills, OH (US);
Elliott K. Stava, Sagamore Hills, OH (US);
Lincoln Global, Inc., City of Industry, CA (US);
Abstract
An auxiliary OCV boost circuit for the power source of an electric arc welder to perform a welding process between an electrode and a workpiece, which power source has a main positive voltage output with a first voltage and a main negative voltage output with a second voltage. The boost circuit comprises a source of positive boost voltage substantially greater than the first voltage, a first switch to add the positive boost voltage to the main positive voltage, a source of negative boost voltage substantially greater than the second voltage, a second switch to add the negative boot voltage to the main negative voltage and a switch control device activated to selectively enable the first and second switches. This OCV boost circuit can be selectively operated in DC mode wherein only the main and boost voltages of one polarity is implemented.