Patents by Inventor Yukihiro Ishikawa

Yukihiro Ishikawa 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).

  • Composite material forming method
    Patent number: 11987013
    Abstract: A method for forming a composite material including reinforcing fibers includes connecting end portions of the reinforcing fibers with equipotential materials to form an electroconductive loop including the reinforcing fibers in the composite material before reaction; and applying a magnetic field in a direction intersecting a plane formed by the electroconductive loop.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: May 21, 2024
    Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., AKITA UNIVERSITY
    Inventors: Toshiyuki Takayanagi, Naomoto Ishikawa, Wataru Nishimura, Nobuyuki Kamihara, Sota Kamo, Kiyoka Takagi, Takashi Ishida, Tomoharu Dengo, Mikio Muraoka, Yukihiro Yoshida
  • Leakage inspection apparatus and leakage inspection method
    Patent number: 9274021
    Abstract: Provided are a leakage inspection apparatus and a leakage inspection method for inspecting the flow rate of leakage from a tested body disposed in a tested-body chamber 21. The leakage inspection apparatus includes liquid supplying and pressurizing means 11 for supplying a probe liquid to the inside of the tested-body chamber 21 and pressurizing the probe liquid to a high pressure 0.1 MPa or more, vacuum evacuation means 22-b, 23-b and a quadrupole mass spectrometer 34. The tested body 21 is evacuated, the probe liquid is supplied to the inside of the tested body and pressurized to 0.1 MPa or more and the concentration of a probe medium leaked from the tested body and evaporated in a vacuum is measured by the quadrupole mass spectrometer 34, thereby measuring the flow rate of leakage from the tested body. This makes it possible to determine the flow rate of leakage using a liquid as a probe medium and simultaneously possible to perform a pressure tightness inspection at an atmospheric pressure of 0.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: March 1, 2016
    Assignees: YAMAGUCHI UNIVERSITY, MARUNAKA CO., LTD.
    Inventors: Setsuo Yamamoto, Hiroki Kurisu, Naoki Takada, Mitsugu Nakagawa, Katsushi Tsuge, Yukihiro Ishikawa
  • LEAKAGE INSPECTION APPARATUS AND LEAKAGE INSPECTION METHOD
    Publication number: 20130199274
    Abstract: Provided are a leakage inspection apparatus and a leakage inspection method for inspecting the flow rate of leakage from a tested body disposed in a tested-body chamber 21. The leakage inspection apparatus includes liquid supplying and pressurizing means 11 for supplying a probe liquid to the inside of the tested-body chamber 21 and pressurizing the probe liquid to a high pressure 0.1 MPa or more, vacuum evacuation means 22-b, 23-b and a quadrupole mass spectrometer 34. The tested body 21 is evacuated, the probe liquid is supplied to the inside of the tested body and pressurized to 0.1 MPa or more and the concentration of a probe medium leaked from the tested body and evaporated in a vacuum is measured by the quadrupole mass spectrometer 34, thereby measuring the flow rate of leakage from the tested body. This makes it possible to determine the flow rate of leakage using a liquid as a probe medium and simultaneously possible to perform a pressure tightness inspection at an atmospheric pressure of 0.
    Type: Application
    Filed: July 1, 2011
    Publication date: August 8, 2013
    Applicants: MARUNAKA CO., LTD., YAMAGUCHI UNIVERSITY
    Inventors: Setsuo Yamamoto, Hiroki Kurisu, Naoki Takada, Mitsugu Nakagawa, Katsushi Tsuge, Yukihiro Ishikawa