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. 27, 2001
Filed:
Nov. 12, 1998
Ji-Cheng Zhao, Niskayuna, NY (US);
Melvin Robert Jackson, Niskayuna, NY (US);
Paul Leonard Dupree, Scotia, NY (US);
James Ross Dobbs, Tallahassee, FL (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method of forming an internal channel within an article, such as a cooling channel in an air-cooled blade, vane, shroud, combustor or duct of a gas turbine engine. The method generally entails forming a substrate to have a groove recessed in its surface. A sacrificial material is then deposited in the groove to form a filler that can be preferentially removed from the groove. A permanent layer is then deposited on the surface of the substrate and over the filler, after which the filler is removed from the groove to yield the desired channel in the substrate beneath the permanent layer.