Metal founding – Process – Shaping liquid metal against a forming surface
Reexamination Certificate
2008-01-29
2008-01-29
Johnson, Jonathan (Department: 1725)
Metal founding
Process
Shaping liquid metal against a forming surface
C164S122200, C164S132000, C164S092100, C228S119000, C029S889100, C148S524000, C148S525000
Reexamination Certificate
active
07322396
ABSTRACT:
A hollow airfoil is fabricated by providing a casting mold assembly including a casting mold, a casting core, and a standoff spacer that prevents the casting core from contacting the casting mold to define a casting space. A first nickel-base superalloy is cast into the casting space and solidified to form the hollow airfoil. The presence of a through-hole extending through a wall of the hollow airfoil is identified, and the through-hole is closed by welding using a second nickel-base superalloy, without using any freestanding closure element.
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Govern Christine
Kelly Thomas Joseph
Sabato Joseph Giancarlo
General Electric Company
Johnson Jonathan
Lin I.-H.
McNees Wallace & Nurick LLC
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