Patents by Inventor James R. Sebastian

James R. Sebastian 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).

  • High temperature piezoelectric sensor
    Patent number: 6617764
    Abstract: The present invention provides a sensor that can be operated at high temperatures. The sensor comprises a first electrode, a second electrode, and an aluminum nitride film which lies between the first and second electrode. The sensor can be used to measure pressure, acceleration, or force at high temperatures.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: September 9, 2003
    Assignee: University of Dayton
    Inventors: James R. Sebastian, David A. Stubbs, Rollie E. Dutton
  • High temperature piezoelectric sensor
    Publication number: 20020043898
    Abstract: The present invention provides a sensor that can be operated at high temperatures. The sensor comprises a first electrode, a second electrode, and an aluminum nitride film which lies between the first and second electrode. The sensor can be used to measure pressure, acceleration, or force at high temperatures.
    Type: Application
    Filed: September 12, 2001
    Publication date: April 18, 2002
    Inventors: James R. Sebastian, David A. Stubbs, Rollie E. Dutton
  • Magnetostrictive, mass isolated, non-resonant, high frequency/low frequency mechanical test system
    Patent number: 5719339
    Abstract: A mechanical test system is provided comprising a primary actuator arranged so as to create mechanical movement of a first specimen holder along an axis of actuation and an oppositely oriented secondary actuator arranged so as to create mechanical movement of a second specimen holder along the axis of actuation. The magnetostrictive actuator comprises a magnetostrictive assembly including a magnetostrictive element and a flexible disk mechanically coupled to the magnetostrictive element. The magnetostrictive element comprises either a magnetostrictive material portion with a plurality of cooling fluid bores formed within the magnetostrictive material portion or an epoxy matrix with a plurality of cooling fluid bores and a plurality of magnetostrictive rods formed within the epoxy matrix.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: February 17, 1998
    Assignee: The University of Dayton
    Inventors: George A. Hartman, James R. Sebastian