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:
Dec. 12, 2000
Filed:
Jun. 03, 1999
James W Caddell, Jr, Milford, OH (US);
Robert D Lawrence, Hammersville, OH (US);
General Electric Company, Cincinnati, OH (US);
Abstract
An assembly and method for welding an article, such as an air-cooled superalloy airfoil of a gas turbine engine nozzle. The method entails inserting a fixture into a cooling passage of the airfoil. The fixture is configured to close a first opening to the passage through which the fixture is inserted into the passage. The fixture is also configured to introduce a gas into the passage through a longitudinal row of ports. A through-wall crack in the airfoil is weld repaired while the gas flow is maintained to the cavity at a rate that sufficiently pressurizes the passage to prevent the molten filler material from entering the passage through the crack, while allowing the filler material to fill the crack.