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:
Dec. 10, 1985
Filed:
Dec. 10, 1984
Bruce O Hatch, Lebanon, NH (US);
Thermal Dynamics Corporation, West Lebanon, NH (US);
Abstract
A plasma arc cutting torch housing defines a chamber which has an outlet at the end of the housing. The torch also includes an electrode in the chamber near the outlet and means in the chamber for separating the gas flowing towards the outlet of the housing into a primary gas flow adjacent to the electrode for generating a plasma and a secondary gas flow away from the electrode for cooling the torch and the workpiece. The electrode has a centrally disposed bore therethrough for conveying gas. Inserts in the bore at opposite ends of the electrode burn away so as to expose the centrally disposed bore and thereby automatically quench operation of the plasma arc so as to prevent damage to the torch. In the preferred embodiment, the electrode has a centrally disposed transverse bore and a pair of transverse bores intermediate the central bore and the electrode ends. In an alternate embodiment, the pair of transverse bores are eliminated and gas is conducted by means of an annular gas distributor.