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:
Feb. 09, 2010
Filed:
Jul. 28, 2006
David J. Cook, Bradford, VT (US);
Kirk H. Ferland, Newport, NH (US);
Charles M. Hackett, Hanover, NH (US);
Yong Yang, Hanover, NH (US);
Richard W. Couch, Jr., Hanover, NH (US);
Zhipeng LU, Lincoln, MA (US);
David J. Cook, Bradford, VT (US);
Kirk H. Ferland, Newport, NH (US);
Charles M. Hackett, Hanover, NH (US);
Yong Yang, Hanover, NH (US);
Richard W. Couch, Jr., Hanover, NH (US);
Zhipeng Lu, Lincoln, MA (US);
Hypertherm, Inc., Hanover, NH (US);
Abstract
A plasma arc torch that includes a torch body having a nozzle mounted relative to a composite electrode in the body to define a plasma chamber. The torch body includes a plasma flow path for directing a plasma gas to the plasma chamber in which a plasma arc is formed. The nozzle includes a hollow, body portion and a substantially solid, head portion defining an exit orifice. The composite electrode can be made of a metallic material (e.g., silver) with high thermal conductivity in the forward portion electrode body adjacent the emitting surface, and the aft portion of the electrode body is made of a second low cost, metallic material with good thermal and electrical conductivity. This composite electrode configuration produces an electrode with reduced electrode wear or pitting comparable to a silver electrode, for a price comparable to that of a copper electrode.