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:
Jun. 15, 1993
Filed:
May. 03, 1991
Applicant:
Inventors:
Emil Pfender, West St. Paul, MN (US);
Stuart J Malmberg, Minneapolis, MN (US);
Assignee:
Regents of the University of Minnesota, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B33K / ;
U.S. Cl.
CPC ...
21912151 ; 21912148 ; 2191215 ; 21912152 ;
Abstract
A gas shrouded plasma torch utilizes a hot anode that has an inert gas passing around the periphery of the anode to provide an inert gas shroud for a plasma stream exiting from the anode. The gas shroud is heated as it passes around the exterior of the hot anode, and when it exits from the passageway and forms a shroud, it mixes with and shields the hot plasma. The arrangement gives the results of less turbulence of the plasma flow, while retaining a high temperature which aids in particle processing.