Wilbur Douglas Scheidt

US Patent:

6339208, Jan 15, 2002

Filed:

Jan 19, 2000

Appl. No.:

09/487856

Inventors:

Todd J. Rockstroh - Maineville OH
Wilbur D. Scheidt - Cincinnati OH
Clarence A. Ash - Madisonville KY

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B23K 2600

US Classification:

21912171, 2191216, 21912161

Abstract:

A method of forming cooling holes in a gas turbine engine component. The method includes the steps of forming a hole in the component extending between a first surface of the component and a second surface of the component opposite the first surface and supplying pressurized air to the hole from the second surface of the component. The method also includes the step of sensing a parameter representative of air flow through the hole. Further, the method includes enlarging the hole until the sensed parameter represents a preselected air flow rate through the hole.

US Patent:

6441341, Aug 27, 2002

Filed:

Jun 16, 2000

Appl. No.:

09/595866

Inventors:

James Dale Steibel - Hamilton OH
Wayne Garcia Edmondson - Xenia OH
Wilbur Douglas Scheidt - Cincinnati OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

B23K 2618

US Classification:

21912171, 21912166

Abstract:

A method for producing apertures in hot section components of gas turbine engines made from ceramic matrix composites that have at least one oxidizable component. The method involves forming the apertures using a laser beam controlled by parameters that ablate the ceramic matrix composite in the path of the beam, while simultaneously heating the matrix material, SiC or SiN, to a sufficient temperature to oxidize it to form a silica. Sufficient heat is supplied by the beam to melt the silica to cause it to flow. The melted silica is quickly solidified as recast silica along the walls of the newly created aperture before it has an opportunity to flow and form undesirable geometries. The wall of the aperture is formed of recast silica that is a smooth surface and that forms an oxidation barrier to inhibit any further oxidation of the underlying composite as it is exposed to the high temperatures and oxidative, corrosive atmosphere of an operating gas turbine.

US Patent:

6670026, Dec 30, 2003

Filed:

Jun 20, 2002

Appl. No.:

10/175756

Inventors:

James Dale Steibel - Hamilton OH
Wayne Garcia Edmondson - Xenia OH
Wilbur Douglas Scheidt - Cincinnati OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

B23K 2618

US Classification:

4282934

Abstract:

A method for producing apertures in hot section components of gas turbine engines made from ceramic matrix composites that have at least one oxidizable component. The method involves forming the apertures using a laser beam controlled by parameters that ablate the ceramic matrix composite in the path of the beam, while simultaneously heating the matrix material, SiC or SiN, to a sufficient temperature to oxidize it to form a silica. Sufficient heat is supplied by the beam to melt the silica to cause it to flow. The melted silica is quickly solidified as recast silica along the walls of the newly created aperture before it has an opportunity to flow and form undesirable geometries. The wall of the aperture is formed of recast silica that is a smooth surface and that forms an oxidation barrier to inhibit any further oxidation of the underlying composite as it is exposed to the high temperatures and oxidative, corrosive atmosphere of an operating gas turbine.

US Patent:

6933061, Aug 23, 2005

Filed:

Dec 12, 2002

Appl. No.:

10/317730

Inventors:

Bangalore Aswatha Nagaraj - West Chester OH, US
Brett Allen Boutwell - Liberty Township OH, US
Todd Jay Rockstroh - Maineville OH, US
Wilbur Douglas Scheidt - Cincinnati OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B32B015/04
C03C016/00
B05D003/00
F03B003/12

US Classification:

428633, 428632, 428332, 428697, 428701, 428702, 427556, 4273762, 4273764, 416241 B

Abstract:

A thermal barrier coating for an underlying metal substrate of articles that operate at, or are exposed to, high temperatures, as well as being exposed to environmental contaminant compositions. This coating comprises an inner layer nearest to the underlying metal substrate comprising a ceramic thermal barrier coating material having a melting point of at least about 2000 F. (1093 C. ), as well as a thermally glazed outer layer having an exposed surface and a thickness up to 0. 4 mils (about 10 microns) and sufficient to at least partially protect the thermal barrier coating against environmental contaminants that become deposited on the exposed surface, and comprising a thermally glazeable coating material having a melting point of at least about 2000 F. (1093 C. ) in an amount up to 100%.

US Patent:

8319146, Nov 27, 2012

Filed:

May 5, 2009

Appl. No.:

12/435547

Inventors:

Ronald Scott Bunker - Niskayuna NY, US
Wenwu Zhang - Schenectady NY, US
Wilbur Douglas Scheidt - Cincinnati OH, US
Magdi Naim Azer - Niskayuna NY, US
Marshall Gordon Jones - Scotia NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

B23K 26/38

US Classification:

21912168, 21912169

Abstract:

A system for producing at least one trench to improve film cooling in a sample is provided. The system includes at least one laser source outputting at least one pulsed laser beam. The pulsed laser beam includes a pulse duration including a range less than about 50 μs, an energy per pulse having a range less than about 0. 1 Joule, and a repetition rate with a range greater than about 1000 Hz. The system also includes a control subsystem coupled to the laser source, the control subsystem configured to synchronize a position of the sample with the pulse duration and energy level in order to selectively remove at least one of a thermal barrier coating, a bondcoat and a substrate metal in the sample to form the at least one trench.

US Patent:

20010001680, May 24, 2001

Filed:

Dec 20, 2000

Appl. No.:

09/742841

Inventors:

Gilbert Farmer - Cincinnati OH, US
Wilbur Scheidt - Cincinnati OH, US
Jeffrey Fehrenbach - Cincinnati OH, US
Thomas Tomlinson - West Chester OH, US
Raymond Heidorn - Fairfield OH, US
John Crow - Morrow OH, US
William Imhoff - Hamilton OH, US

International Classification:

B05D003/04
B05D003/12

US Classification:

427/348000, 427/446000

Abstract:

A method of applying thermal barrier coating systems to a metal piece having a cooling hole extending along a central axis through the piece from a first surface of the piece to a second surface of the piece opposite the first surface. The method includes spraying a bond coat on the first surface of the piece and spraying a thermal barrier coating on the bond coat. Further, the method includes spraying a high pressure fluid jet from a nozzle toward the hole and in a direction generally parallel to the central axis of the hole. The fluid jet is substantially free of solid particulate thereby permitting the jet to remove the bond coat and the thermal barrier coating from the hole without removing metal from the piece.

US Patent:

20110185572, Aug 4, 2011

Filed:

Jan 29, 2010

Appl. No.:

12/697005

Inventors:

Bin Wei - Mechanicville NY, US
Jon Conrad Schaeffer - Simpsonville SC, US
Ronald Scott Bunker - Niskayuna NY, US
Wenwu Zhang - Schenectady NY, US
Kathleen Blanche Morey - Scotia NY, US
Jane Marie Lipkin - Niskayuna NY, US
Benjamin Paul Lacy - Greenville SC, US
Wilbur Douglas Scheidt - Green Township OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B21D 53/00
B23P 17/00
B23K 26/00

US Classification:

2989002, 29418, 21912171

Abstract:

A process and system are provided for forming shaped air holes, such as for use in turbine blades. Aspects of the disclosure relate to forming shaped portions of air holes using a short pulse laser, forming a metered hole corresponding to each shaped portion, and separately finishing the shaped portion using a short-pulse laser. In other embodiments, the order of these operations may be varied, such as to form the shaped portions and to finish the shaped portions using the short-pulse laser prior to forming the corresponding metered holes.

US Patent:

59416866, Aug 24, 1999

Filed:

Nov 7, 1997

Appl. No.:

8/969404

Inventors:

Bhupendra K. Gupta - Cincinnati OH
Robert P. Ziegler - Montgomery OH
Wilbur D. Scheidt - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F01D 508

US Classification:

415178

Abstract:

A fluid cooled article having a protective coating on a surface, for example an air cooled gas turbine engine article having a Thermal Barrier Coating, includes through an article wall a fluid cooling passage, and typically a plurality of passages, having openings sized to maintain desired fluid flow, unobstructed by coating within the passage at an exit opening. The passage has a first or inlet opening, which establishes the amount of fluid flow through the passage, and a second opening through which the flow exits the passage through a wall surface on which the coating is deposited. A method for making the article to have such unobstructed flow includes selecting a cross sectional area for the first opening, selecting a coating method for deposit of the coating, in a selected thickness range, on the wall surface and partially within the passage at the second opening, and generating the passage to have a second opening with a cross sectional area greater than that of the first opening by an amount which is no less than a reduction in cross sectional area resulting from partial deposit of the coating through the second opening.