Kenneth L Parks

US Patent:

7467655, Dec 23, 2008

Filed:

Nov 29, 2006

Appl. No.:

11/605457

Inventors:

Thomas B. Beddard - Simpsonville SC, US
Kenneth L. Parks - Clarksville TN, US

Assignee:

General Electric Co. - Schenectady NY

International Classification:

B22C 9/10

US Classification:

164369, 164370

Abstract:

A core for use in casting a gas turbine bucket includes a solid, curved upper body portion and a pair of co-planar legs extending downwardly from the solid, curved upper body portions. The pair of legs are separated by an elongated open slot extending from a lower end of the core upwardly more than half a height dimension of the core, into the upper body portion. A pair of axially aligned pegs project in axially opposite directions from opposite sides of the solid, curved upper body portion, perpendicular to and above the elongated slot but spaced from an upper edge of the solid, curved upper body portion. The pair of pegs lie substantially in a plane containing the co-planar legs, and in a radial direction, the pegs are closer to the elongated slot than to the upper edge.