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, 1992
Filed:
Feb. 15, 1991
Applicant:
Inventor:
Gerald Dufrenne, LaVerne, CA (US);
Assignee:
Unitek Equipment Inc., Monrovia, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
219109 ;
Abstract
An apparatus and method for monitoring weld quality and for establishing a proper amount of weld energy and the upper and lower limits of the proper weld energy to be supplied by a precision resistance welding apparatus in order to produce acceptable welds. In the present apparatus and method the difference between the change in voltage and current supplied to a test weld is compared to a reference weld and this difference is used to obtain the upper and lower limits of the proper amount of energy to be supplied by the welder in a production context.