Method and device to prevent coating a dovetail of a turbine...

Details Method and device to prevent coating a dovetail of a turbine... Method and device to prevent coating a dovetail of a turbine...

2006-03-13

2009-12-15

Culbert, Roberts (Department: 1792)

Coating processes

Coating by vapor, gas, or smoke

C427S250000

Reexamination Certificate

active

07632541

ABSTRACT:
A method and masking assembly for masking a dovetail portion of a turbine blade during coating of an airfoil portion of the blade. The masking assembly comprises at least two masking members, each having an exterior surface and an oppositely-disposed undulatory surface complementary to one of oppositely-disposed undulatory surfaces of the dovetail portion. By mating the masking members, the undulatory surfaces thereof define an interior cavity within the masking assembly that accommodates the dovetail portion, and the undulatory surfaces of the masking members contact the undulatory surfaces of the dovetail portion to entrap the dovetail portion within the interior cavity of the masking assembly.

REFERENCES:
patent: 6616969 (2003-09-01), Pfaendtner et al.
patent: 6695587 (2004-02-01), Wustman et al.
patent: 6821564 (2004-11-01), Das et al.
patent: 6863927 (2005-03-01), Langley et al.
patent: 2005/0227589 (2005-10-01), Oussaada et al.

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