William A Litzinger

US Patent:

39828514, Sep 28, 1976

Filed:

Sep 2, 1975

Appl. No.:

5/609346

Inventors:

Richard H. Andersen - Cincinnati OH
William A. Litzinger - Cincinnati OH
Robert J. Corsmeier - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F01D 518

US Classification:

416 92

Abstract:

A hollow turbomachinery blade is formed by way of casting or the like with an open tip end except for a bridge which is formed integrally with the blade side walls at a central position with respect to the leading and trailing edges. Also formed integrally with the blade side walls, proximate the tip end openings near the leading and trailing edges, are a plurality of supporting and retaining bosses, the supporting bosses being in substantially the same plane as the bridge, and the retaining bosses being disposed radially outward thereof. Each of the forward and rear tip caps is installed by placing it over the bridge and then sliding it either forward or rearward to be captured by the supporting and retaining bosses and to thereby close the respective tip opening. Each of the tip caps is then brazed into position so as not to allow its sliding back out.

US Patent:

40105318, Mar 8, 1977

Filed:

Apr 2, 1976

Appl. No.:

5/672887

Inventors:

Richard H. Andersen - Cincinnati OH
William A. Litzinger - Cincinnati OH
Robert J. Corsmeier - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B23P 1504
F01D 518

US Classification:

291568H

Abstract:

A hollow turbomachinery blade is formed by way of casting or the like with an open tip end except for a bridge which is formed integrally with the blade side walls at a central position with respect to the leading and trailing edges. Also formed integrally with the blade side walls, proximate the tip end openings near the leading and trailing edges, are a plurality of supporting and retaining bosses, the supporting bosses being in substantially the same plane as the cast cap, and the retaining bosses being disposed radially outward thereof. Each of the forward and rear tip caps is installed by placing it over the bridge ad then sliding it either forward or rearward to be captured by the supporting and retaining bosses and to thereby close the respective tip opening. Each of the tip caps is then brazed into position so as not to allow its sliding back out.

US Patent:

48728128, Oct 10, 1989

Filed:

Aug 5, 1987

Appl. No.:

7/081773

Inventors:

David G. Hendley - Wyoming OH
William A. Litzinger - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F01D 522

US Classification:

416190

Abstract:

A gas turbine rotor blade platform sealing and damping system has elongated symmetrical insert elements of equilateral triangular cross-section loosely received within complementary shaped pockets at the spacing gaps between opposing convex and concave airfoil side edges of adjacently mounted blade platforms. The inserts and pockets are relatively configured to provide self-orientation of the inserts into gap sealing and vibration damping engagement with the platform edges when acted upon by centrifugal force due to rotor rotation. The convex platform edge is thickened at the point of closest proximity with the convex side of the airfoil. Alternative embodiments utilize insert grooves for increased leakage of cooling gas past the platform edges and incorporate a central bore for mass reduction.