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:
May. 17, 1977
Filed:
Jul. 30, 1975
Applicant:
Inventor:
Kenneth A Darrow, Sprakers, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
2915 / ; 29424 ; 228118 ; 228215 ; 416 / ;
Abstract
Before skins are brazed on airfoil cores having cooling channels recessed into the surfaces thereof, the surfaces of the cooling channel walls are covered with a layer of oxide material. The oxide formation selected is one that is not reducible in dry hydrogen. Thereafter, when the normally employed hydrogen or vacuum brazing operation is conducted to apply the airfoil skin, the oxide-covered sides of the cooling channels will not be wet by the molten braze alloy. Plugging of the covered cooling channels during manufacture is thereby greatly reduced.