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:
Apr. 06, 2004
Filed:
Apr. 18, 2002
Applicant:
Inventors:
Brian Peter Arness, Simpsonville, SC (US);
James Michael Placko, West Chester, OH (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23H 1/00 ; B23H 9/10 ;
U.S. Cl.
CPC ...
B23H 1/00 ; B23H 9/10 ;
Abstract
The present invention involves a process for increasing coolant side surface roughness on castings such as airfoils, shrouds, nozzles or the like by electrical discharge machining (EDM). An EDM electrode is shaped to fill completely or a portion of a cavity in the casting, the electrode is then connected to an electric discharge machine, and the internal surfaces of the internal core cavity are then machined to form a roughened surface.