Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2007-12-31
2010-10-05
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C029S889710, C029S889720, C029S889230, C029S557000
Reexamination Certificate
active
07805839
ABSTRACT:
A metal leading edge of a turbine fan blade is manufactured by cutting and shaping an elongated metal part. The metal part has front and rear edges extending lengthwise of the part, and has a generally wedge-shaped transverse cross-section with opposite sides diverging from the front edge toward the rear edge. A cavity is cut inward from the rear edge toward the front edge. This provides the part with a generally V-shaped transverse cross-section having opposite side walls diverging rearwardly from the front edge. A mandrel is inserted into the cavity, and the side walls of the V-shaped part are deflected toward each other to constrict the cavity into the configuration of the mandrel. The part is then mounted as a metal leading edge by inserting a turbine fan blade component into the constricted cavity and fastening the part to the component.
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International Search Report for corresponding PCT Application (PCT/US08/88517), 2 pages, Dated Aug. 12, 2009.
Bryant David P
Cigna Jacob J
Day Jones
Turbine Engine Components Technologies Corporation
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