Patents by Inventor Douglas E. Duke

Douglas E. Duke 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).

  • Enhanced turbine airfoil cooling
    Patent number: 7901180
    Abstract: The ends of cooling air passages in turbine blades and/or vanes of a gas turbine engine are provided with turbulation promoters to enhance the cooling of such structures as inner and outer shrouds and the like to accommodate thermal loads thereon.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: March 8, 2011
    Assignee: United Technologies Corporation
    Inventors: William Abdel-Messeh, Andrew J. Lutz, Douglas E. Duke, Jose A. Lopes, Aaron T. Frost, Kevin J. Pallos, Kenneth J. Sawyer, Eric Herbst, Michael D. Greenberg, Ricardo Trindade
  • Enhanced turbine airfoil cooling
    Publication number: 20080279695
    Abstract: The ends of cooling air passages in turbine blades and/or vanes of a gas turbine engine are provided with turbulation promoters to enhance the cooling of such structures as inner and outer shrouds and the like to accommodate thermal loads thereon.
    Type: Application
    Filed: May 7, 2007
    Publication date: November 13, 2008
    Inventors: William Abdel-Messeh, Andrew J. Lutz, Douglas E. Duke, Jose A. Lopes, Aaron T. Frost, Kevin J. Pallos, Kenneth J. Sawyer, Eric Herbst, Michael D. Greenberg, Ricardo Trindade
  • Method and apparatus for refurbishing a gas turbine airfoil
    Patent number: 6302625
    Abstract: A portable device for refurbishing an edge of an airfoil is provided that has an edge shaper and airfoil positioners that positively engage the airfoil. A method for refurbishing an edge of an airfoil is also provided that includes the steps of (a) providing the portable refurbishing device; (b) locating the edge shaper and the airfoil edge relative to one another with the positioners; and (c) moving one of the device or the airfoil relative to the other along the airfoil edge.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: October 16, 2001
    Assignee: United Technologies Corporation
    Inventors: Patrick R. Carey, Richard M. Murphy, Dennis C. Shooter, Douglas E. Duke, Zonda L. Feulner
  • Flutter resistant blades, vanes and arrays thereof for a turbomachine
    Patent number: 5667361
    Abstract: An array (32) of flow directing elements such as fan blades (20) for a turbine engine (10) is disclosed. Each blade in the array has a set of circumferentially shrouds (42, 44) whose contact edges (46, 48) abut each other during engine operation. A shroud angle .sigma. establishes the running chord angle .alpha. of the airfoil (30) portion of the array. Slight differences in the shroud angles of adjacent blades cause corresponding differences in the running chord angles so that the array is detuned and airfoil flutter is precluded.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: September 16, 1997
    Assignee: United Technologies Corporation
    Inventors: Karl J. Yaeger, Douglas E. Duke, James A. Sunamoto, William Henry Greene, Jr.