Patents by Inventor Kenjiro Hashi

Kenjiro Hashi 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).

  • Superconducting magnet device and method for limiting current decrease in case of abnormality therein
    Patent number: 11171479
    Abstract: A superconducting magnet device including a superconducting coil formed of a high-temperature superconducting wire, a power supply which supplies current to the superconducting coil, and a protector capable of forming a short-circuit path which short-circuits both ends of the superconducting coil to each other is installed. Current is made to flow from the power supply to the superconducting coil in a superconducting state, and the superconducting coil thereby generates a magnetic field. After the magnetic field is generated, when an abnormality of the superconducting magnet device is detected, or when the power supply and the superconducting coil are disconnected from each other, the short-circuit path is formed by the protector.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: November 9, 2021
    Assignees: RIKEN, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Masato Takahashi, Hideaki Maeda, Kenjiro Hashi, Gen Nishijima, Shinji Matsumoto, Takashi Noguchi, Tadashi Shimizu
  • SUPERCONDUCTING MAGNET DEVICE AND METHOD FOR LIMITING CURRENT DECREASE IN CASE OF ABNORMALITY THEREIN
    Publication number: 20180233899
    Abstract: A superconducting magnet device including a superconducting coil formed of a high-temperature superconducting wire, a power supply which supplies current to the superconducting coil, and a protector capable of forming a short-circuit path which short-circuits both ends of the superconducting coil to each other is installed. Current is made to flow from the power supply to the superconducting coil in a superconducting state, and the superconducting coil thereby generates a magnetic field. After the magnetic field is generated, when an abnormality of the superconducting magnet device is detected, or when the power supply and the superconducting coil are disconnected from each other, the short-circuit path is formed by the protector.
    Type: Application
    Filed: April 12, 2018
    Publication date: August 16, 2018
    Applicants: RIKEN, National Institute for Materials Science
    Inventors: Masato TAKAHASHI, Hideaki MAEDA, Kenjiro HASHI, Gen NISHIJIMA, Shinji MATSUMOTO, Takashi NOGUCHI, Tadashi SHIMIZU
  • Mine detector with NQR-SQUID
    Patent number: 7394250
    Abstract: A portable small mine detecting device for detecting a mine by transmitting a radio wave and detecting the NQR of nitrogen 14 atoms (14N) contained in the mine using a high-sensitivity, high-temperature superconducting SQUID magnetic sensor. The mine detecting device can be applied to non-metal mines and can detect different kinds of explosive substances simultaneously.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: July 1, 2008
    Assignee: National Institute of Materials Science
    Inventors: Hideo Itozaki, Kyoko Kawagishi, Tadayuki Kondo, Tadashi Shimizu, Kenjiro Hashi
  • Noncontact cargo detector
    Publication number: 20060122484
    Abstract: A small chemical substance detecting device capable of detecting, by transmitting a radio wave, the NQR of an atom contained in a chemical substance by means of a high-temperature superconducting SQUID magnetic sensor exhibiting a high sensitivity even at a low frequency without unsealing the chemical substance contained in a package or a container. The detecting device can also identify the chemical substance at the same time.
    Type: Application
    Filed: November 21, 2003
    Publication date: June 8, 2006
    Applicant: National Institute For Materials Science
    Inventors: Hideo Itozaki, Kyoko Kawagishi, Tadayuki Kondo, Tadashi Shimizu, Kenjiro Hashi
  • Mine detector with nqr-squid
    Publication number: 20060113998
    Abstract: A portable small mine detecting device for detecting a mine by transmitting a radio wave and detecting the NQR of nitrogen 14 atoms (14N) contained in the mine by means of a high-sensitivity, high-temperature superconducting SQUID magnetic sensor. The mine detecting device can be applied to non-metal mines and can detect different kinds of explosive substances simultaneously.
    Type: Application
    Filed: November 21, 2003
    Publication date: June 1, 2006
    Applicant: National Institute For Materials Science
    Inventors: Hideo Itozaki, Kyoko Kawagishi, Tadayuki Kondo, Tadashi Shimizu, Kenjiro Hashi