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:
Jan. 07, 1992
Filed:
Nov. 19, 1990
Applicant:
Inventors:
Eric D Arndt, Lower Burrell, PA (US);
John M Urbanic, Churchill, PA (US);
Clark W Keller, Leechburg, PA (US);
C Ricardo Sammy, Murrysville, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
420590 ; 75560 ;
Abstract
A known 'spark cup process' may be operated without the spark cup if the violent fluctuations in the melt surface with which the electric arc is struck are accommodated so as to allow the electric arc to be maintained substantially continuously. Controlling the dynamic profile of the melt surface without a spark cup allows continuous operation of the electric arc which generates enough plasma to permit addition of as much as 1000 lb/hr of a spray of superheated feed material to a flowing stream of melt which assimilates the feed material.