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. 14, 1986
Filed:
Mar. 30, 1984
Applicant:
Inventor:
Gerald Dufrenne, LaVerne, CA (US);
Assignee:
Unitek Corporation, Monrovia, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
219110 ; 2191171 ;
Abstract
A direct current pulse welder including circuitry for controlling the amount of electric energy delivered to the weld site. By means of feedback techniques the output impedance of the welder is adjusted and changed by utilizing a voltage feedback signal and a current feedback signal to match the impedance of the weld site. Matching the impedance of the welder to the impedance of the weld site enables the welder to deliver the correct amount of power desired to each weld regardless of variations in actual impedance of the weld sites that occur in actual production situations.