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:
Mar. 16, 1993
Filed:
Nov. 27, 1991
Wayne S Severance, Jr, Florence, SC (US);
David G Anderson, Florence, SC (US);
ESAB Welding Products, Inc., Florence, SC (US);
Abstract
A plasma arc torch used in underwater cutting is disclosed. The plasma arc torch includes a torch body having a front end of substantially cylindrical configuration, and an electrode supported by the torch body and defining a discharge end extending toward the front end. A nozzle is mounted on the front end of the torch body adjacent the front discharge end of the electrode, and has a bore through which plasma is ejected. A cylindrical support body is secured onto the outer surface of the torch body and extends in spaced relation from the torch body outer surface toward the front end and forms an annular opening. A cylindrical sleeve has a rear portion received within the annular opening of the cylindrical support body and extends in spaced relation along the front end of the torch body to define an annular air chamber extending along the front end and forming an annular outlet opening positioned adjacent the nozzle. A high velocity gas is injected into the annular air chamber. The high velocity gas swirls downward through the outlet opening for generating a protective air curtain for the plasma during underwater torch operation.