Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Reexamination Certificate
2005-06-21
2005-06-21
McNeil, Jennifer (Department: 1775)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
C060S752000, C060S755000, C416S09700R, C416S09700R
Reexamination Certificate
active
06908657
ABSTRACT:
A process of removing deposits from through-holes in a component, such as metallic bond coat and ceramic materials from cooling holes in an air-cooled gas turbine engine. The process is particularly effective in removing a TBC material deposited in a cooling hole of a component as a result of depositing a coating of the TBC material on a surface of the component, in which the deposit is removed from the cooling hole without damaging the cooling hole or the TBC coating surrounding the cooling hole on the coated surface of the component. A preferred feature is that the cooling hole, including the entrance to the hole at a surface of the component opposite the coated surface and the coating surrounding the exit of the hole at the coated surface, exhibits improved surface characteristics that increase the discharge coefficient of the cooling hole, as evidenced by an increase in the effective area of the cooling hole.
REFERENCES:
patent: 6004620 (1999-12-01), Camm
patent: 6210488 (2001-04-01), Bruce
patent: 6368060 (2002-04-01), Fehrenbach et al.
patent: 1 103 627 (2001-05-01), None
Farmer Gilbert
Fehrenbach Jeffrey Arnold
General Electric Company
Hartman Domenica N.S.
Hartman Gary M.
McNeil Jennifer
Narciso David L.
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