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:
Nov. 29, 1983
Filed:
Nov. 03, 1980
Applicant:
Inventor:
Rudolf Graf, Obermuhen, CH;
Assignee:
Sprecher & Schuh AG, Aarau, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 2001 / ; 2001 / ; 2001 / ;
Abstract
A plastic mass of a blast nozzle contains a filler which is at least partially composed of powder of one or more metals. The proportion of metal powder amounts to at most 30 percent by weight, preferably 5 to 15 percent by weight. As the filler there is particularly suitable, alone or in combination, the metals of tungsten, copper, aluminum and iron. The electrically conductive filler prevents penetration of the electromagnetic radiation emanating from the arc into the interior of the blast nozzle, resulting in an appreciable reduction in nozzle burn-off.