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. 28, 1997
Filed:
Dec. 13, 1995
Applicant:
Inventor:
Donald W Carkhuff, Florence, SC (US);
Assignee:
The ESAB Group, Inc., Florence, SC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912148 ; 21912155 ; 21912154 ; 21912151 ;
Abstract
A plasma arc torch includes a torch body defining a discharge axis, an electrode coaxially aligned on the discharge axis, a nozzle assembly positioned adjacent the discharge end of the electrode, and a heat shield removably secured on the torch body. A power supply delivers electrical current to the electrode to create an electrical arc, and a plasma gas is delivered so as to surround the arc. Also, a pressure sensing system is provided for sensing the pressure of the plasma gas and for disabling the power supply if there is insufficient gas pressure, such as when the heat shield is removed.