Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2007-01-29
2010-11-30
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C029S889721
Reexamination Certificate
active
07841083
ABSTRACT:
A method of producing cooling fluid discharge orifices in the wall of a part manufactured by the technique of lost wax casting in which a pattern of the part is produced in a wax mold, the orifices each having a first portion emerging at the external surface of the wall is disclosed. The method includes making cavities in the wax pattern that correspond to the first portions of said orifices of the part. Thus, it is possible to produce cooling air discharge orifices without sharp edges.
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Alaux Thierry Henri Raymond
Huchin Patrick Emilien Paul Emile
Rosset Patrice Jean-Marc
Soulalioux Boris
Bryant David P
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
SNECMA
Walters Ryan J
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