Patents by Inventor Yukihiro TSUNEZUMI

Yukihiro TSUNEZUMI 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).

  • Ignition device for two-pulse rocket motor with thermal barrier membrane
    Patent number: 9371801
    Abstract: In a two-pulse rocket motor provided with a pressure vessel, a first propellant placed within the pressure vessel that burns during a first pulse stage, a second propellant placed within the pressure vessel that burns during a second pulse stage following the first pulse stage, and a barrier membrane placed so as to cover the entire initial burning surface of the second propellant, wherein the barrier membrane is provided with an inner barrier membrane that covers the inner peripheral surface of the second propellant and an aft barrier membrane that covers the rear surface of the second propellant, and an end portion where the aft barrier membrane and the inner barrier membrane meet is joined over the entire circumference thereof. The ignition device includes an energy supply unit, an energy transfer unit connected at one end to the energy supply unit, and an ignition unit.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: June 21, 2016
    Assignees: ASAHI KASEI KABUSHIKI KAISHA, MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tomohiro Kishida, Yukihiro Tsunezumi, Chiyako Mihara, Tasuku Suzuki, Katsunori Ieki
  • IGNITION DEVICE FOR TWO-PULSE ROCKET MOTOR WITH THERMAL BARRIER MEMBRANE
    Publication number: 20130327016
    Abstract: In a two-pulse rocket motor provided with a pressure vessel, a first propellant placed within the pressure vessel that burns during a first pulse stage, a second propellant placed within the pressure vessel that burns during a second pulse stage following the first pulse stage, and a barrier membrane placed so as to cover the entire initial burning surface of the second propellant, wherein the barrier membrane is provided with an inner barrier membrane that covers the inner peripheral surface of the second propellant and an aft barrier membrane that covers the rear surface of the second propellant, and an end portion where the aft barrier membrane and the inner barrier membrane meet is joined over the entire circumference thereof. The ignition device includes an energy supply unit, an energy transfer unit connected at one end to the energy supply unit, and an ignition unit.
    Type: Application
    Filed: June 6, 2013
    Publication date: December 12, 2013
    Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Tomohiro KISHIDA, Yukihiro TSUNEZUMI, Chiyako MIHARA, Tasuku SUZUKI, Katsunori IEKI