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. 18, 1994
Filed:
Dec. 17, 1992
Applicant:
Inventors:
Leonard S Smith, Minneapolis, MN (US);
Gary L Cook, Eagan, MN (US);
Assignee:
Snap-on Incorporated, Kenosha, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21913051 ;
Abstract
A power supply for a consumable electrode arc welding system includes a power transformer adapted to be coupled to an AC source and having a rectified secondary coupled through a series inductor to the electrode. The rectified current is chopped by a MOSFET switch array controlled by a relatively high frequency pulse width modulator having a selectively variable pulse width to supply a pulsed unidirectional current flow to the welding gun. A bridge rectifier is connected across an auxiliary winding of the transformer to provide a supply voltage to the modulator.