Patents by Inventor Thomas John Tomlinson
Thomas John Tomlinson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9023486Abstract: Coating systems and processes by which the coating systems can be deposited to be resistant to contaminants, and particularly resistant to infiltration and damage caused by CMAS. The coating systems include inner and outer ceramic layers, each having a microstructure characterized by splats and horizontal porosity. The inner ceramic layer consists essentially of zirconia stabilized by about 6 to about 9 weight percent yttria. The outer ceramic layer overlies and contacts the inner ceramic layer to define the outermost surface of the coating system. The outer ceramic layer consists essentially of zirconia stabilized by about 25 to about 75 weight percent yttria, has a thickness that is less than the thickness of the inner ceramic layer, and has a porosity level that is lower than that of the inner ceramic layer.Type: GrantFiled: December 30, 2011Date of Patent: May 5, 2015Assignee: General Electric CompanyInventors: Bangalore Aswatha Nagaraj, Thomas John Tomlinson
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Publication number: 20140377473Abstract: Coating systems and processes by which the coating systems can be deposited to be resistant to contaminants, and particularly resistant to infiltration and damage caused by CMAS. The coating systems include inner and outer ceramic layers, each having a microstructure characterized by splats and horizontal porosity. The inner ceramic layer consists essentially of zirconia stabilized by about 6 to about 9 weight percent yttria. The outer ceramic layer overlies and contacts the inner ceramic layer to define the outermost surface of the coating system. The outer ceramic layer consists essentially of zirconia stabilized by about 25 to about 75 weight percent yttria, has a thickness that is less than the thickness of the inner ceramic layer, and has a porosity level that is lower than that of the inner ceramic layer.Type: ApplicationFiled: September 10, 2014Publication date: December 25, 2014Inventors: BANGALORE ASWATHA NAGARAJ, THOMAS JOHN TOMLINSON
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Publication number: 20140248425Abstract: A method of manufacturing a component suitable for use in a gas turbine engine, comprising the steps of forming the component from a substrate having a first surface and a second surface, forming at least one aperture through the substrate from the first surface to the second surface having a first open area, applying a first coating to at least one of the first surface and the second surface adjacent to the at least one aperture, the aperture remaining at least partially unobstructed by the first coating, applying a second coating to the first coating adjacent to the at least one aperture, the aperture remaining at least partially unobstructed by the second coating, and removing the second coating from the aperture, leaving most or all of the first coating to define a second open area which is smaller than the first open area.Type: ApplicationFiled: June 20, 2013Publication date: September 4, 2014Inventors: David Bruce Patterson, John Howard Starkweather, Thomas George Holland, Thomas John Tomlinson
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Publication number: 20130095344Abstract: Coating systems and processes by which the coating systems can be deposited to be resistant to contaminants, and particularly resistant to infiltration and damage caused by CMAS. The coating systems include inner and outer ceramic layers, each having a microstructure characterized by splats and horizontal porosity. The inner ceramic layer consists essentially of zirconia stabilized by about 6 to about 9 weight percent yttria. The outer ceramic layer overlies and contacts the inner ceramic layer to define the outermost surface of the coating system. The outer ceramic layer consists essentially of zirconia stabilized by about 25 to about 75 weight percent yttria, has a thickness that is less than the thickness of the inner ceramic layer, and has a porosity level that is lower than that of the inner ceramic layer.Type: ApplicationFiled: December 30, 2011Publication date: April 18, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Bangalore Aswatha Nagaraj, Thomas John Tomlinson
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Publication number: 20110302781Abstract: Rub coatings, and methods for applying rub coatings, are provided for compressor assemblies of gas turbine engine assemblies. The coating may be applied as an initial coating to a new surface of a component, as well as a repair and replacement corrosion resistant rub coating for applying to a previously coated component of a gas turbine engine assembly such as a compressor casing. The method includes the steps of providing a component of a gas turbine engine assembly, the component having predetermined dimensions and specifications for operational use in an engine assembly. The component has a surface having a damaged rub coating thereon, the damaged rub coating not in compliance with the predetermined dimensions and specifications. The method includes removing the non-compliant damaged rub coating to expose the surface. Next, a repair corrosion resistant rub coating comprising MCrAlX is applied to the surface.Type: ApplicationFiled: August 22, 2011Publication date: December 15, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Albert S. DODD, IV, Thomas John Tomlinson, William R. Rossey, JR.
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Publication number: 20090108134Abstract: An icing protection system and method for enhancing heat transfer includes a substrate having an inner wall, an outer wall and a thickness separating the inner wall and the outer wall. A metallic layer deposited on the inner wall of the substrate by an electric arc thermal spray deposition process using at least one metallic wire has a thickness between about 0.203 mm (0.008 inches) and about 0.432 mm (0.017 inches), a surface roughness greater than about 12.7 microns (500 micro-inches) Ra, and a heat transfer augmentation of at least about 1.1. The metallic layer is formed on the inner wall from an M-Cr—Al alloy where M is selected from Fe, Co and Ni. The metallic layer defines a plurality of turbulators that act as micro-fins to enhance heat transfer from a heated gas in flow communication with the metallic layer through the substrate to prevent the formation of ice on the outer wall.Type: ApplicationFiled: October 25, 2007Publication date: April 30, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Joseph Albert Thodiyil, Daniel Jean-Louis Laborie, Andrew Jay Skoog, Thomas John Tomlinson
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Patent number: 7294413Abstract: A protected article includes a substrate having a surface, and a protective system overlying and contacting a first portion of the surface of the substrate. The protective system has a nickel-base superalloy bond coat, an aluminide layer overlying and contacting the bond coat, and a dense vertically microcracked ceramic thermal barrier coating overlying and contacting the aluminide layer.Type: GrantFiled: March 7, 2005Date of Patent: November 13, 2007Assignee: General Electric CompanyInventors: Bangalore Aswatha Nagaraj, D. Keith Patrick, Thomas John Tomlinson, David Walter Parry
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Publication number: 20070248457Abstract: Rub coatings, and methods for applying rub coatings, are provided for compressor assemblies of gas turbine engine assemblies. The coating may be applied as an initial coating to a new surface of a component, as well as a repair and replacement corrosion resistant rub coating for applying to a previously coated component of a gas turbine engine assembly such as a compressor casing. The method includes the steps of providing a component of a gas turbine engine assembly, the component having predetermined dimensions and specifications for operational use in an engine assembly. The component has a surface having a damaged rub coating thereon, the damaged rub coating not in compliance with the predetermined dimensions and specifications. The method includes removing the non-compliant damaged rub coating to expose the surface. Next, a repair corrosion resistant rub coating comprising MCrAlX is applied to the surface.Type: ApplicationFiled: October 26, 2006Publication date: October 25, 2007Applicant: GENERAL ELECTRIC COMPANYInventors: Albert S. Dodd, Thomas John Tomlinson, William R. Rossey
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Patent number: 7216485Abstract: A method for adjusting the airflow in a turbine component having a plurality of airflow holes. The method comprises the step of depositing an overlay metallic coating on the surface of the turbine component in a manner such that at least some of the airflow holes are partially filled such that the volume of the partially filled airflow holes is changed so as to adjust the airflow through the turbine component. Also provided is a turbine component having a plurality of airflow holes, at least some of the airflow holes being partially filled with the overlay metallic coating to change the volume thereof so as to adjust the airflow through the turbine component.Type: GrantFiled: September 3, 2004Date of Patent: May 15, 2007Assignee: General Electric CompanyInventors: James Michael Caldwell, Thomas John Tomlinson, Robert George Zimmerman, Jr., Raymond William Heidorn, Gilbert Farmer
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Patent number: 7094450Abstract: A method applying a thermal barrier coating to a metal substrate, or for repairing a thermal barrier coating previously applied by physical vapor deposition to an underlying aluminide diffusion coating that overlays the metal substrate. The aluminide diffusion coating is treated to make it more receptive to adherence of a plasma spray-applied overlay alloy bond coat layer. An overlay alloy bond coat material is then plasma sprayed on the treated aluminide diffusion coating to form an overlay alloy bond coat layer. A ceramic thermal barrier coating material is plasma sprayed on the overlay alloy bond coat layer to form the thermal barrier coating. In the repair embodiment of this method, the physical vapor deposition-applied thermal barrier coating is initially removed from the underlying aluminide diffusion coating.Type: GrantFiled: April 30, 2003Date of Patent: August 22, 2006Assignee: General Electric CompanyInventors: Bangalore Aswatha Nagaraj, Eva Zielonka Lanman, Deborah Anne Schorr, Thomas John Tomlinson, Raymond William Heidorn, David Allen Kastrup, Craig Douglas Young
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Patent number: 6847004Abstract: A process of removing ceramic deposits from a surface hole in a component, a particular example being portions of a ceramic coating deposited on a surface of a component equipped with cooling holes. The process makes use of a pulsed Nd:YAG laser operated with parameters that avoid delamination, cracking or otherwise damaging a ceramic coating surrounding a cooling hole. The laser is operated to generate a laser beam that removes some of the ceramic deposit from the hole while a residual portion of the ceramic deposit remains surrounding the hole to define a surface opening.Type: GrantFiled: January 10, 2003Date of Patent: January 25, 2005Assignee: General Electric CompanyInventors: Nripendra Nath Das, Mark Samuel Bailey, Clarence Albert Ash, Thomas John Tomlinson
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Publication number: 20040219290Abstract: A method applying a thermal barrier coating to a metal substrate, or for repairing a thermal barrier coating previously applied by physical vapor deposition to an underlying aluminide diffusion coating that overlays the metal substrate. The aluminide diffusion coating is treated to make it more receptive to adherence of a plasma spray-applied overlay alloy bond coat layer. An overlay alloy bond coat material is then plasma sprayed on the treated aluminide diffusion coating to form an overlay alloy bond coat layer. A ceramic thermal barrier coating material is plasma sprayed on the overlay alloy bond coat layer to form the thermal barrier coating. In the repair embodiment of this method, the physical vapor deposition-applied thermal barrier coating is initially removed from the underlying aluminide diffusion coating.Type: ApplicationFiled: April 30, 2003Publication date: November 4, 2004Inventors: Bangalore Aswatha Nagaraj, Eva Zielonka Lanman, Deborah Anne Schorr, Thomas John Tomlinson, Raymond William Heidorn, David Allen Kastrup, Craig Douglas Young
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Publication number: 20040134897Abstract: A process of removing ceramic deposits from a surface hole in a component, a particular example being portions of a ceramic coating deposited on a surface of a component equipped with cooling holes. The process makes use of a pulsed Nd:YAG laser operated with parameters that avoid delamination, cracking or otherwise damaging a ceramic coating surrounding a cooling hole. The laser is operated to generate a laser beam that removes some of the ceramic deposit from the hole while a residual portion of the ceramic deposit remains surrounding the hole to define a surface opening.Type: ApplicationFiled: January 10, 2003Publication date: July 15, 2004Applicant: GENERAL ELECTRIC COMPANYInventors: Nripendra Nath Das, Mark Samuel Bailey, Clarence Albert Ash, Thomas John Tomlinson
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Patent number: 6620457Abstract: A method of applying a thermal barrier coating system to a metal piece having cooling holes angled in a first direction and cooling holes angled in a second direction. The method includes spraying a bond coat on a first surface of the piece at angles with respect to the first and second directions and to a thickness selected in combination with the angles to prevent the bond coat from entirely filling any of the holes. A thermal barrier coating is sprayed on the bond coat at angles with respect to the first and second directions and to a thickness selected in combination with the angles to prevent the thermal barrier coating from entirely filling any of the holes. The method also includes spraying a high pressure fluid jet from a nozzle assembly through each hole generally parallel to the respective cooling hole.Type: GrantFiled: July 13, 2001Date of Patent: September 16, 2003Assignee: General Electric CompanyInventors: Gilbert Farmer, Thomas John Tomlinson, Raymond William Heidorn, Jeffrey Arnold Fehrenbach, William Lee Imhoff, Myron Edward Rutherford
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Publication number: 20030010035Abstract: A method of applying a thermal barrier coating system to a metal piece having cooling holes angled in a first direction and cooling holes angled in a second direction. The method includes spraying a bond coat on a first surface of the piece at angles with respect to the first and second directions and to a thickness selected in combination with the angles to prevent the bond coat from entirely filling any of the holes. A thermal barrier coating is sprayed on the bond coat at angles with respect to the first and second directions and to a thickness selected in combination with the angles to prevent the thermal barrier coating from entirely filling any of the holes. The method also includes spraying a high pressure fluid jet from a nozzle assembly through each hole generally parallel to the respective cooling hole.Type: ApplicationFiled: July 13, 2001Publication date: January 16, 2003Inventors: Gilbert Farmer, Thomas John Tomlinson, Raymond William Heidorn, Jeffrey Arnold Fehrenbach, William Lee Imhoff, Myron Edward Rutherford