Patents by Inventor Mark Douglas Ehresman

Mark Douglas Ehresman 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).

  • Extraction of chordal test specimens from forgings
    Patent number: 8338736
    Abstract: A method for making a test specimen includes machining out a chordal core from an annular forging and machining the specimen symmetrical about a chordal axis of the core. A linear cutting tool such as a wire EDM machine is used for the machining which includes at least a partially cylindrical cutting about the chordal axis with the linear cutting tool. A copper or brass tubular EDM electrode may be used. The chordal core may be machined from fat of the forging. The test specimen may have with a gauge section diameter in a range of 0.1-0.5 inches. The EDM process may include directing jets of machining fluid or dielectric in up and down along a cutting portion of an EDM wire of the EDM machine or performing the EDM process in a tank of machining fluid or dielectric with the annular forging submerged in the fluid or dielectric.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: December 25, 2012
    Assignee: General Electric Company
    Inventors: Christophe Jude Day, Mark Douglas Ehresman, Clifford Edward Allen, Jr., Mark Joseph Gleason, Michael Joseph Gambone
  • EXTRACTION OF CHORDAL TEST SPECIMENS FROM FORGINGS
    Publication number: 20100043517
    Abstract: A method for making a test specimen includes machining out a chordal core from an annular forging and machining the specimen symmetrical about a chordal axis of the core. A linear cutting tool such as a wire EDM machine is used for the machining which includes at least a partially cylindrical cutting about the chordal axis with the linear cutting tool. A copper or brass tubular EDM electrode may be used. The chordal core may be machined from fat of the forging. The test specimen may have with a gauge section diameter in a range of 0.1-0.5 inches. The EDM process may include directing jets of machining fluid or dielectric in up and down along a cutting portion of an EDM wire of the EDM machine or performing the EDM process in a tank of machining fluid or dielectric with the annular forging submerged in the fluid or dielectric.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 25, 2010
    Inventors: Christophe Jude Day, Mark Douglas Ehresman, Clifford Edward Allen, JR., Mark Joseph Gleason, Michael Joseph Gambone