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:
Sep. 09, 2003
Filed:
Dec. 06, 2001
Jeffrey Ihde, Greenville, WI (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A method and apparatus for welding, and particularly for clearing a short while welding is disclosed. If a short occurs, output current is increased from a first magnitude to a second magnitude and the short is monitored. If the short has not cleared after the current has reached the second magnitude the current is increased to a third magnitude. The difference between the second and first magnitudes is less than the difference between the third and second magnitudes. The current may be is increased from a fourth magnitude (which may be the normal operating magnitude) to the first magnitude before the increase to the second magnitude. The difference between the first and fourth magnitudes is less than the difference between the third magnitude and the second magnitude. The current is increased to the second magnitude only if the short has not cleared after the current is increased to the first magnitude.