Patents by Inventor Jun Uzawa

Jun Uzawa 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).

  • Controlling method of superconductor magnetic field application apparatus, and nuclear magnetic resonance apparatus and superconducting magnet apparatus using the method
    Patent number: 6545474
    Abstract: A controlling method for a nuclear magnetic resonance apparatus. The method includes: (A) cooling the high-temperature superconductor at a magnetization low temperature sufficiently lower than a superconductor transition temperature, and magnetizing the high-temperature superconductor with a magnetic field; (B) raising the temperature of the high-temperature superconductor at a magnetic flux setting temperature higher than the magnetization low temperature and lower than the superconductor transition temperature and setting a predetermined magnetic flux density; and (C) controlling the high-temperature superconductor in an operation temperature range lower than the magnetic flux setting temperature. Therefore, a strong static magnetic field comparable to a conventional superconducting magnet is formed without using a refrigerant (liquid helium) essential for operating the conventional superconducting magnet, and a magnetic flux density of the static magnetic field is held constant.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: April 8, 2003
    Assignees: Riken, Aisin Seiki Kabushiki Kaisha
    Inventors: Takashi Nakamura, Jun Uzawa, Tetsuo Oka, Yoshitaka Ito, Yousuke Yanagi, Masaaki Yoshikawa, Ryohei Yabuno
  • Nuclear magnetic resonance apparatus
    Patent number: 6489769
    Abstract: A nuclear magnetic resonance apparatus including: a cup-shaped high-temperature superconductor 20 having a hollow cylindrical shape or portion cooled to not more than a superconducting transition temperature in a vacuum insulating container 22; and a detection coil 12 for detecting an NMR signal of a material 11 to be measured inserted into the hollow cylindrical portion 20a of the high-temperature superconductor. The high-temperature superconductor is magnetized in an axial direction, a static magnetic field is thereby generated in the hollow cylindrical portion in a cylinder axial direction, and the NMR signal of a material is detected by the detection coil and the existing spectrometer. A strong static magnetic field comparable to a conventional superconducting magnet is formed without using a refrigerant (liquid helium) essential for operating the conventional superconducting magnet, and a strength distribution of the static magnetic field is homogeneous.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: December 3, 2002
    Assignees: Riken, Aisin Seiki Kabushiki Kaisha
    Inventors: Takashi Nakamura, Jun Uzawa, Tetsuo Oka, Yoshitaka Ito, Yousuke Yanagi, Masaaki Yoshikawa, Ryohei Yabuno, Uichiro Mizutani
  • Nuclear magnetic resonance apparatus
    Publication number: 20020000806
    Abstract: There is disclosed a nuclear magnetic resonance apparatus comprising: a cup-shaped high-temperature superconductor 20 having a hollow cylindrical shape or portion cooled at a temperature not more than a superconducting transition temperature in a vacuum insulating container 22; and a detection coil 12 for detecting an NMR signal of a material 11 to be measured inserted into the hollow cylindrical portion 20a of the high-temperature superconductor. The high-temperature superconductor is magnetized in an axial direction, a static magnetic field is thereby generated in the hollow cylindrical portion in a cylinder axial direction, and the NMR signal of the material to be measured disposed in the magnetic field is detected by the detection coil and the existing spectrometer.
    Type: Application
    Filed: June 26, 2001
    Publication date: January 3, 2002
    Applicant: Riken
    Inventors: Takashi Nakamura, Jun Uzawa, Tetsuo Oka, Yoshitaka Ito, Yousuke Yanagi, Masaaki Yoshikawa, Ryohei Yabuno, Uichiro Mizutani
  • Controlling method of superconductor magnetic field application apparatus, and nuclear magnetic resonance apparatus and superconducting magnet apparatus using the method
    Publication number: 20020000807
    Abstract: There is disclosed a controlling method of a nuclear magnetic resonance apparatus in which a static magnetic field is generated by a high-temperature superconductor 20 positioned in a vacuum insulating container 22. The method comprises: a magnetizing step (A) for cooling the high-temperature superconductor at a magnetization low temperature sufficiently lower than a superconductor transition temperature, and magnetizing the high-temperature superconductor with the magnetic field; a magnetic flux setting step (B) for raising the temperature of the high-temperature superconductor at a magnetic flux setting temperature higher than the magnetization low temperature and lower than the superconductor transition temperature and setting a predetermined magnetic flux density; and an operation controlling step (C) for controlling the high-temperature superconductor in an operation temperature range lower than the magnetic flux setting temperature.
    Type: Application
    Filed: June 26, 2001
    Publication date: January 3, 2002
    Applicant: Riken
    Inventors: Takashi Nakamura, Jun Uzawa, Tetsuo Oka, Yoshitaka Ito, Yousuke Yanagi, Masaaki Yoshikawa, Ryohei Yabuno
  • Nuclear magnetic resonance spectrometer
    Patent number: 6169402
    Abstract: A magnet for producing a static magnetic field is improved, and a small-sized, high-resolution nuclear magnetic resonance system is provided. A superconductive bulk (17) of a high-temperature superconductor is cooled in a vacuum insulated container (16), and magnetized with a magnetizing coil (19). This is used for analyzing a subject (11).
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: January 2, 2001
    Assignees: Aisin Seiki Kabushiki Kaisha, The Institute of Physical and Chemical Research
    Inventors: Tetsuo Oka, Yoshitaka Ito, Yousuke Yanagi, Masaaki Yoshikawa, Ryohei Yabuno, Jun Uzawa