Patents by Inventor Nesim Abuaf

Nesim Abuaf 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).

  • Publication number: 20060138195
    Abstract: A method of providing turbulation on the inner surface of a passage hole (e.g., a turbine cooling hole) is described. The turbulation is first applied to a substrate which can eventually be inserted into the passage hole. The substrate is often a bar or tube, formed of a sacrificial material. After the turbulation is applied to the substrate, the substrate is inserted into the passage hole. The turbulation material is then fused to the inner surface, using a conventional heating technique. The sacrificial substrate can then be removed from the hole by various techniques. Related articles are also described.
    Type: Application
    Filed: February 8, 2005
    Publication date: June 29, 2006
    Inventors: Wayne Hasz, Nesim Abuaf, Robert Johnson, Ching-Pang Lee
  • Patent number: 6910620
    Abstract: A method of providing turbulation on the inner surface of a passage hole (e.g., a turbine cooling hole) is described. The turbulation is first applied to a substrate which can eventually be inserted into the passage hole. The substrate is often a bar or tube, formed of a sacrificial material. After the turbulation is applied to the substrate, the substrate is inserted into the passage hole. The turbulation material is then fused to the inner surface, using a conventional heating technique. The sacrificial substrate can then be removed from the hole by various techniques. Related articles are also described.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: June 28, 2005
    Assignee: General Electric Company
    Inventors: Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson, Ching-Pang Lee
  • Patent number: 6846575
    Abstract: An article includes turbulation material bonded to a surface of a substrate via a bonding agent, such as a braze alloy. In an embodiment, the turbulation material includes a particulate phase of discrete metal alloy particles having an average particle size within a range of about 125 microns to about 4000 microns. Other embodiments include methods for applying turbulation and articles for forming turbulation.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: January 25, 2005
    Assignee: General Electric Company
    Inventors: Wayne Charles Hasz, Robert Alan Johnson, Ching-Pang Lee, Mark Gerard Rettig, Nesim Abuaf, John Howard Starkweather
  • Patent number: 6786982
    Abstract: A casting includes a heat transfer surface having a plurality of cavities. The plurality of cavities include a density of at least about 25 cavities per square centimeter to about 1,100 cavities per square centimeter resulting in increased surface area and therefore enhanced heat transfer capability. Also disclosed is a mold for forming a pattern for molding the casting. The mold includes a surface defining a portion of a chamber to which are attached a plurality of particles having an average particle size in a range of about 300 microns to about 2,000 microns.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: September 7, 2004
    Assignee: General Electric Company
    Inventors: Ching Pang Lee, Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson
  • Publication number: 20040131877
    Abstract: An article includes turbulation material bonded to a surface of a substrate via a bonding agent, such as a braze alloy. In an embodiment, the turbulation material includes a particulate phase of discrete metal alloy particles having an average particle size within a range of about 125 microns to about 4000 microns. Other embodiments include methods for applying turbulation and articles for forming turbulation.
    Type: Application
    Filed: June 5, 2003
    Publication date: July 8, 2004
    Inventors: Wayne Charles Hasz, Robert Alan Johnson, Ching-Pang Lee, Mark Gerard Rettig, Nesim Abuaf, John Howard Starkweather
  • Patent number: 6733229
    Abstract: The invention comprises a metering plate which is assembled to an impingement insert for use in the nozzle of a gas turbine. The metering plate can have one or more metering holes and is used to balance the cooling flow within the nozzle. A metering plate with multiple holes reduces static pressure variations which result from the cooling airflow through the metering plate. The metering plate can be assembled to the insert before or after the insert is inserted into the nozzle.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: May 11, 2004
    Assignee: General Electric Company
    Inventors: Steven S. Burdgick, Gary Itzel, Sanjay Chopra, Nesim Abuaf, Victor H. Correia
  • Publication number: 20040072014
    Abstract: A method of providing turbulation on the inner surface of a passage hole (e.g., a turbine cooling hole) is described. The turbulation is first applied to a substrate which can eventually be inserted into the passage hole. The substrate is often a bar or tube, formed of a sacrificial material. After the turbulation is applied to the substrate, the substrate is inserted into the passage hole. The turbulation material is then fused to the inner surface, using a conventional heating technique. The sacrificial substrate can then be removed from the hole by various techniques. Related articles are also described.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 15, 2004
    Applicant: General Electric Company
    Inventors: Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson, Ching-Pang Lee
  • Publication number: 20030170113
    Abstract: The invention comprises a metering plate which is assembled to an impingement insert for use in the nozzle of a gas turbine. The metering plate can have one or more metering holes and is used to balance the cooling flow within the nozzle. A metering plate with multiple holes reduces static pressure variations which result from the cooling airflow through the metering plate. The metering plate can be assembled to the insert before or after the insert is inserted into the nozzle.
    Type: Application
    Filed: March 8, 2002
    Publication date: September 11, 2003
    Inventors: Steven S. Burdgick, Gary Itzel, Sanjay Chopra, Nesim Abuaf, Victor H. Correia
  • Patent number: 6598781
    Abstract: An article includes turbulation material bonded to a surface of a substrate via a bonding agent, such as a braze alloy. In an embodiment, the turbulation material includes a particulate phase of discrete metal alloy particles having an average particle size within a range of about 125 microns to about 4000 microns. Other embodiments include methods for applying turbulation and articles for forming turbulation.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: July 29, 2003
    Assignee: General Electric Company
    Inventors: Wayne Charles Hasz, Robert Alan Johnson, Ching-Pang Lee, Mark Gerard Rettig, Nesim Abuaf, John Howard Starkweather
  • Patent number: 6589600
    Abstract: A turbine engine component is provided that has a surface that contains a plurality of depressions that are effective to increase the surface area of the component. The depressions are generally concave in contour and improve the heat transfer characteristics of the component. Methods for forming the turbine engine components are also disclosed.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: July 8, 2003
    Assignee: General Electric Company
    Inventors: Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson, Ching-Pang Lee
  • Patent number: 6546730
    Abstract: A combustor liner is provided on its backside cooling surface with a braze alloy coating and cooling enhancement material, preferably metallic particles to enhance the heat transfer between the liner and the cooling medium. The surface area of the backside coated area is increased substantially by the coating and particles in relation to the uncoated surface areas. Consequently, the life of the liner is extended.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: April 15, 2003
    Assignee: General Electric Company
    Inventors: Robert Alan Johnson, Anthony Joseph Loprinzo, Ching-Pang Lee, Nesim Abuaf, Wayne Charles Hasz, Harmon Lindsay Morton
  • Publication number: 20030056927
    Abstract: A casting includes a heat transfer surface having a plurality of cavities. The plurality of cavities include a density of at least about 25 cavities per square centimeter to about 1,100 cavities per square centimeter resulting in increased surface area and therefore enhanced heat transfer capability. Also disclosed is a mold for forming a pattern for molding the casting. The mold includes a surface defining a portion of a chamber to which are attached a plurality of particles having an average particle size in a range of about 300 microns to about 2,000 microns.
    Type: Application
    Filed: October 24, 2002
    Publication date: March 27, 2003
    Inventors: Ching Pang Lee, Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson
  • Patent number: 6537619
    Abstract: Castings for gas turbine parts exposed on one side to a high-temperature fluid medium have cast-in bumps on an opposite cooling surface side to enhance heat transfer. Areas on the cooling surface having defectively cast bumps, i.e., missing or partially formed bumps during casting, are thermally sprayed to provide a metallic cooling enhancement surface layer to salvage the part.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: March 25, 2003
    Assignee: General Electric Company
    Inventors: Robert Alan Johnson, Jon Conrad Schaeffer, Ching-Pang Lee, Nesim Abuaf
  • Patent number: 6526756
    Abstract: A combustor liner is provided on its backside cooling surface with a braze alloy coating and cooling enhancement material, preferably metallic particles to enhance the heat transfer between the liner and the cooling medium. The surface area of the backside coated area is increased substantially by the coating and particles in relation to the uncoated surface areas. Consequently, the life of the liner is extended.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: March 4, 2003
    Assignee: General Electric Company
    Inventors: Robert Alan Johnson, Anthony Joseph Loprinzo, Ching-Pang Lee, Nesim Abuaf, Wayne Charles Hasz, Harmon Lindsay Morton
  • Patent number: 6505673
    Abstract: A method of forming a turbine engine component, includes providing a mold having a textured region, pouring a molten alloy into the mold, and cooling the molten alloy to form a turbine engine component, wherein the turbine engine component has an enhanced surface area region corresponding to the textured region of the mold, the enhanced surface area region comprising randomly arranged bumps.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: January 14, 2003
    Assignee: General Electric Company
    Inventors: Nesim Abuaf, Wayne Charles Hasz, Ching-Pang Lee, Robert Alan Johnson, Frederick Alan Buck
  • Patent number: 6502622
    Abstract: A casting includes a heat tranfer surface having a pluality of cavities. The plurality of cavities includes a density of at least about 25 cavities per square centimeter to about 1,100 cavities per square centimeter resulting in increased surface area and therefore enhanced heat transfer capability. Also disclosed is a mold for forming a pattern for molding the casting. The mold includes a surface defining a portion of a chamber to which are attached a plurality of particles having an average particle size in a range of about 300 microns to about 2,000 microns.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: January 7, 2003
    Assignee: General Electric Company
    Inventors: Ching Pang Lee, Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson
  • Publication number: 20020174967
    Abstract: A casting includes a heat transfer surface having a plurality of cavities. The plurality of cavities include a density of at least about 25 cavities per square centimeter to about 1,100 cavities per square centimeter resulting in increased surface area and therefore enhanced heat transfer capability. Also disclosed is a mold for forming a pattern for molding the casting. The mold includes a surface defining a portion of a chamber to which are attached a plurality of particles having an average particle size in a range of about 300 microns to about 2,000 microns.
    Type: Application
    Filed: February 12, 2002
    Publication date: November 28, 2002
    Inventors: Ching Pang Lee, Wayne Charles Hasz, Nesim Abuaf, Robert Alan Johnson
  • Publication number: 20020168537
    Abstract: An article includes turbulation material bonded to a surface of a substrate via a bonding agent, such as a braze alloy. In an embodiment, the turbulation material includes a particulate phase of discrete metal alloy particles having an average particle size within a range of about 125 microns to about 4000 microns. Other embodiments include methods for applying turbulation and articles for forming turbulation.
    Type: Application
    Filed: June 24, 2002
    Publication date: November 14, 2002
    Inventors: Wayne Charles Hasz, Robert Alan Johnson, Ching-Pang Lee, Mark Gerard Rettig, Nesim Abuaf, John Howard Starkweather
  • Patent number: 6478540
    Abstract: A turbine bucket includes an airfoil extending from a platform, having high and low pressure sides; a wheel mounting portion; a hollow shank portion located radially between the platform and the wheel mounting portion, the platform having an under surface. An impingement cooling plate is located in the hollow shank portion, spaced from the under surface, and the impingement plate is formed with a plurality of impingement cooling holes therein.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: November 12, 2002
    Assignee: General Electric Company
    Inventors: Nesim Abuaf, Kevin Joseph Barb, Sanjay Chopra, David Max Kercher, Iain Robertson Kellock, Dean Thomas Lenahan, Sankar Nellian, John Howard Starkweather, Douglas Arthur Lupe
  • Publication number: 20020152755
    Abstract: A combustor liner is provided on its backside cooling surface with a braze alloy coating and cooling enhancement material, preferably metallic particles to enhance the heat transfer between the liner and the cooling medium. The surface area of the backside coated area is increased substantially by the coating and particles in relation to the uncoated surface areas. Consequently, the life of the liner is extended.
    Type: Application
    Filed: June 12, 2002
    Publication date: October 24, 2002
    Inventors: Robert Alan Johnson, Anthony Joseph Loprinzo, Ching-Pang Lee, Nesim Abuaf, Wayne Charles Hasz, Harmon Lindsay Morton