Patents by Inventor Stephen Daniel Graham

Stephen Daniel Graham 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: 20080099177
    Abstract: An investment casting process that enables directionally solidified tip shrouded turbine blades or buckets to have a continuous grain structure that extends through the tip shroud in addition to increasing the quantity of grains in the root of the part.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 1, 2008
    Applicant: General Electric Company
    Inventors: Stephen Daniel Graham, Robert Alan Brittingham
  • Patent number: 7220326
    Abstract: A family of castable and weldable nickel-base alloys that exhibit a desirable balance of strength and resistance to corrosion and oxidation suitable for gas turbine engine applications. A first alloy consists essentially of, by weight, 1 8% to 20% cobalt, 22.2% to 22.8% chromium, 1.8% to 2.2% tungsten, greater than 1.5% to 2.3% aluminum, 1.6% to 2.4% titanium, where the sum of aluminum and titanium is 2.8% to 4.4%, 0.7% to 0.9% columbium, 0.9% to 1.9% tantalum, 0.003% to 0.009% boron, 0.002% to 0.02% zirconium, 0.05% to 0.10% carbon, with the balance essentially nickel and incidental impurities. A second alloy consists essentially of, by weight, 5% to 8% cobalt, 22.2% to 22.8% chromium, 1.8% to 2.2% tungsten, 1.2% to 2.3% aluminum, 1.6% to 2.4% titanium, where the sum of aluminum and titanium is 2.8% to 4.4%, 0.7% to 0.9% columbium, 0.9% to 1.9% tantalum, 0.003% to 0.009% boron, 0.002% to 0.02% zirconium, 0.05% to 0.10% carbon, with the balance essentially nickel and incidental impurities.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: May 22, 2007
    Assignee: General Electric Company
    Inventors: Cyril Gerard Beck, John Herbert Wood, Stephen Daniel Graham, Warren Tan King
  • Patent number: 7014723
    Abstract: Castable and weldable nickel-base alloys that exhibit a desirable balance of strength and resistance to corrosion and oxidation suitable for gas turbine engine applications. The alloy contains, by weight, about 10% to about 25% cobalt, about 20% to about 28% chromium, about 1% to about 3% tungsten, about 1.6% to about 3.8% aluminum, about 0.4% to about 1.5% titanium, where the sum of aluminum and titanium is about 1.8% to about 5.0%, about 0.5% to about 1.5% columbium, 0.5% to about 1.5% tantalum, about 0.001% to about 0.025% boron, about 0.05% maximum zirconium, about 0.02% to about 0.15% carbon, with the balance essentially nickel and incidental impurities. The alloy may more preferably contain about 2.8% to about 3.8% aluminum where the sum of aluminum and titanium is about 3.0% to about 5.0%, or about 1.6% to about 2.8% aluminum, where the sum of aluminum and titanium is about 1.8% to about 4.3%.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: March 21, 2006
    Assignee: General Electric Company
    Inventors: Cyril Gerard Beck, John Herbert Wood, Stephen Daniel Graham
  • Patent number: 6881439
    Abstract: An aluminiding process that enables the cooling holes of an air-cooled component, such as a hot gas path component of a gas turbine engine, to be machined and then aluminized after all external surface coatings have been deposited. The aluminide coating is deposited using a slurry process capable of forming the aluminide coating on the component without damaging an existing ceramic coating on the component. The process involves applying an activator-free slurry containing aluminum particles that, when the component is sufficiently heated, melt and diffuse into the component surface to form the diffusion aluminide coating.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: April 19, 2005
    Assignee: General Electric Company
    Inventors: Stephen Daniel Graham, John Herbert Wood, Cyril Gerard Beck, Warren Tan King
  • Publication number: 20040109948
    Abstract: An aluminiding process that enables the cooling holes of an air-cooled component, such as a hot gas path component of a gas turbine engine, to be machined and then aluminized after all external surface coatings have been deposited. The aluminide coating is deposited using a slurry process capable of forming the aluminide coating on the component without damaging an existing ceramic coating on the component. The process involves applying an activator-free slurry containing aluminum particles that, when the component is sufficiently heated, melt and diffuse into the component surface to form the diffusion aluminide coating.
    Type: Application
    Filed: December 4, 2002
    Publication date: June 10, 2004
    Applicant: General Electric Company
    Inventors: Stephen Daniel Graham, John Herbert Wood, Cyril Gerard Beck, Warren Tan King
  • Patent number: 6432487
    Abstract: A process for applying a vertically cracked ceramic thermal barrier coating to a machine component includes a.) applying a plurality of layers of the ceramic thermal barrier coating on the component, utilizing a nozzle at a first distance from the component; b.) applying an additional sacrificial outer layer of the ceramic thermal barrier coating of the same chemical composition as the plurality of layers on the component, with the nozzle at a second distance from the component, greater than the first distance; and c) removing at least some of the outer layers to achieve thickness and surface roughness specifications.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: August 13, 2002
    Assignee: General Electric Company
    Inventors: Stephen Daniel Graham, Mark Francis DeSoi, Martin Lewis Smith, Michael Wayne Wallace, Robert Leighton Ling
  • Publication number: 20020086117
    Abstract: A process for applying a thermal barrier coating to a machine component including:
    Type: Application
    Filed: December 28, 2000
    Publication date: July 4, 2002
    Inventors: Stephen Daniel Graham, Mark Francis DeSoi, Martin Lewis Smith, Michael Wayne Wallace, Robert Leighton Ling