Patents by Inventor Jeffrey D. Irvine

Jeffrey D. Irvine 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).

  • Ultra low sulfur superalloy castings and method of making
    Patent number: 5922148
    Abstract: Directionally solidified superalloy components having a bulk sulfur concentration of less than 1 part per million by weight are provided by vacuum melting a charge to form a superalloy melt, desulfurizing the melt by contact with a calcium-bearing desulfurizing agent for a time to reduce sulfur concentration of the melt to less than 1 ppm by weight, casting the melt directly or following solidification and remelting in a ceramic investment mold, and directionally solidifying the melt as cast components without adverse bulk sulfur pick-up subsequent to desulfurization to provide castings having a sulfur content below 1 ppm, such as in the range of hundreds of parts per billion to provide significantly improved oxidation resistance.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: July 13, 1999
    Assignee: Howmet Research Corporation
    Inventors: Jeffrey D. Irvine, Russell G. Vogt, Donald L. Bierstine, Christine M. Stabile, John R. Mihalisin, Jeffery S. Smith, John P. Kunkle, Gail R. Cole, Thomas W. Nielsen
  • Cleaning, method for cleaning internal airfoil cooling passages
    Patent number: 5618353
    Abstract: A plurality of engine-run components are fixtured on a cleaning fluid manifold disposed in a cleaning chamber with the internal passage of each component communicated to a respective fluid spray nozzle on the cleaning fluid manifold, a heated caustic cleaning fluid is pumped to the manifold for flow through the nozzle and then the internal passage of each component for a time to remove the deposits, and the heated cleaning fluid is discharged from each component into the cleaning chamber.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: April 8, 1997
    Assignee: Howmet Corporation
    Inventors: Jeffrey D. Irvine, Jeffery S. Smith, Patrick L. Conroy
  • Cleaning apparatus and method for cleaning internal airfoil cooling passages
    Patent number: 5507306
    Abstract: A plurality of engine-run components are fixtured on a cleaning fluid manifold disposed in a cleaning chamber with the internal passage of each component communicated to a respective fluid spray nozzle on the cleaning fluid manifold, a heated caustic cleaning fluid is pumped to the manifold for flow through the nozzle and then the internal passage of each component for a time to remove the deposits, and the heated cleaning fluid is discharged from each component into the cleaning chamber.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: April 16, 1996
    Assignee: Howmet Corporation
    Inventors: Jeffrey D. Irvine, Jeffery S. Smith, Patrick L. Conroy