Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2008-08-22
2010-11-30
Nguyen, Ninh H (Department: 3745)
Metal working
Method of mechanical manufacture
Impeller making
C219S121850, C427S259000, C416S09700R, C416S24100B, C416S232000
Reexamination Certificate
active
07841084
ABSTRACT:
The present technology relates to the problem that during diverse machining steps of application to the production or reconditioning of internally cooled gas turbine blades, an undesired effect may be had on sections of the gas turbine blades and proposes, as an improvement, to inject the cavity of the gas turbine blades before the machining steps with a plastic material which can be removed without trace, such as polystyrene, which can be subsequently removed again, in particular by heat.
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International Search Report corresponding to International Application Serial No. PCT/DE2007/000361, mailed Jul. 18, 2007.
McAndrews Held & Malloy Ltd.
MTU Aero Engines GmbH
Nguyen Ninh H
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