Patents Assigned to Superconductor Technologies, Inc.
  • Patent number: 10330259
    Abstract: A cryostat includes a coolant tank, a refrigerator, a cylindrical member, and a gas phase volume-varying unit. The coolant tank houses a liquid coolant. The refrigerator is provided above the coolant tank and recondenses the coolant evaporated in the coolant tank. The cylindrical member houses a lower part of the refrigerator and forms a recondensing chamber that communicates with the coolant tank. The gas phase volume-varying unit communicates with a gas-phase space above a liquid surface of the liquid coolant in the coolant tank and varies a gas phase volume in the gas-phase space to cancel out a pressure fluctuation in the coolant tank.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: June 25, 2019
    Assignee: JAPAN SUPERCONDUCTOR TECHNOLOGY, INC.
    Inventors: Kazuhito Tago, Yasuhide Nagahama, Kentaro Kominato
  • Publication number: 20180315531
    Abstract: There is provided a superconducting magnet device that suppresses interference of a part of a tape wire wound around a center axis with another adjacent part. The number of unit wire layer turns of a first coil among the plurality of first coils is smaller than a mean value of the respective numbers of unit wire layer turns of the plurality of first coils, the number of unit wire layer turns of each of the first coils being expressed by a mean value of the respective numbers of turns of the tape wire in the plurality of wire layers, the first coil being disposed at such a position that compressive force acting on the first coil in a direction in which the center axis extends is the largest on the assumption that the respective numbers of unit wire layer turns of the plurality of first coils were the same.
    Type: Application
    Filed: April 20, 2018
    Publication date: November 1, 2018
    Applicants: JAPAN SUPERCONDUCTOR TECHNOLOGY INC., RIKEN
    Inventors: Mamoru HAMADA, Yoshinori YANAGISAWA
  • Patent number: 10097067
    Abstract: Liquefier includes first compression section which is driven by a superconducting motor and which compresses a substance in a gaseous state. Cooling circuit includes: second compression section which is driven by the motor when first compression section is being driven by the motor and which compresses a refrigerant; first heat exchange section which cools the refrigerant by causing heat exchange between a substance in a tank and the compressed refrigerant; second expansion section which brings the refrigerant down to or below a critical temperature of a superconducting material by expanding the cooled refrigerant; and second heat exchange section which imparts cold heat of the refrigerant to the substance by causing heat exchange between the substance in the tank and the refrigerant after cooling a superconducting magnet, and supplies the refrigerant brought down to or below the critical temperature by second expansion section to the motor and cools the superconducting magnet.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 9, 2018
    Assignees: Kobe Steel, Ltd., JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Kenichi Inoue, Kazuyoshi Saitou, Kyoji Zaitsu, Koji Inoue, Satoshi Ito
  • Patent number: 10002697
    Abstract: A superconducting magnet device includes a superconducting coil, a radiation shield, a refrigeration unit, a vacuum case, an electrode member, and a conductive member. The vacuum case includes a case body housing the superconducting coil and a surrounding cover that surrounds the refrigeration unit. The conductive member includes a contact portion having a sleeve-shaped outer circumferential face and thermally contactable with an inner face of the surrounding cover via an insulating material. The surrounding cover includes a heat radiating part including at least a surface of a portion of the surrounding cover overlapping the contact portion in a radial direction of the surrounding cover. Thermal conductivity of the heat radiating part is higher than thermal conductivity of stainless steel.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: June 19, 2018
    Assignee: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventor: Atsuko Oka
  • Publication number: 20180144852
    Abstract: Provided is a superconducting coil pre-cooling method for cooling a superconducting coil in a superconducting magnet apparatus including: the superconducting coil; a helium tank; a radiation shield; a vacuum case; and a refrigerator including a first cooling stage and a second cooling stage, a passage being disposed between the refrigerator and the radiation shield. The method includes: a supplying step of supplying a working medium in a gaseous state having a condensation point lower than a condensation point of nitrogen into a refrigerator surrounding tube; a cooling step of cooling the superconducting coil in a tank body by the working medium in the gaseous state that is cooled in the first cooling stage and further cooled in the second cooling stage after passing through the passage; and a discharging step of discharging the working medium that has cooled the superconducting coil in the tank body, out of the vacuum case.
    Type: Application
    Filed: October 26, 2017
    Publication date: May 24, 2018
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventor: Satoshi ITO
  • Publication number: 20170294256
    Abstract: A superconducting magnet device includes a vacuum container having a tubular barrel portion; a magnet assembly including a superconducting coil, a refrigerant tank, and a radiation shield, the magnet assembly being housed in the vacuum container; a supporting block fixed to the barrel portion and protruding beyond the barrel portion to the inside of the vacuum container; and a connecting portion which connects the magnet assembly and the supporting block to each other such that the magnet assembly is spaced apart from the barrel portion within the vacuum container. The connecting portion has thermal conductivity lower than thermal conductivity of the supporting member. The supporting member receives weight of the magnet assembly via the connecting portion while protruding inwardly beyond at least an outer circumference surface of the radiation shield of the magnet assembly.
    Type: Application
    Filed: March 27, 2017
    Publication date: October 12, 2017
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Atsuko OKA, Shota KANAI
  • Publication number: 20170287606
    Abstract: A method for maintaining a refrigeration unit includes a connecting step of connecting a refrigerator body to a vacuum case with a first cooling stage in thermal contact with a radiation shield, where in the connecting step, the fastening force of the fastening member is adjusted such that the temperature of the first cooling stage becomes a target temperature.
    Type: Application
    Filed: March 23, 2017
    Publication date: October 5, 2017
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Hitoshi MIYATA, Atsuko OKA
  • Publication number: 20170287607
    Abstract: A superconducting magnet device includes a superconducting coil, a radiation shield, a refrigeration unit, a vacuum case, an electrode member, and a conductive member. The vacuum case includes a case body housing the superconducting coil and a surrounding cover that surrounds the refrigeration unit. The conductive member includes a contact portion having a sleeve-shaped outer circumferential face and thermally contactable with an inner face of the surrounding cover via an insulating material. The surrounding cover includes a heat radiating part including at least a surface of a portion of the surrounding cover overlapping the contact portion in a radial direction of the surrounding cover. Thermal conductivity of the heat radiating part is higher than thermal conductivity of stainless steel.
    Type: Application
    Filed: March 23, 2017
    Publication date: October 5, 2017
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventor: Atsuko OKA
  • Publication number: 20170287608
    Abstract: A superconducting magnet device includes a superconducting coil, a radiation shield, a vacuum case, an electrode member, and a conductive member. The conductive member includes an oxidized lead disposed in the radiation shield. The vacuum case includes a case body having an outer opening and an outer lid that is detachably attachable to the case body. The radiation shield includes a shield body having an inner opening and an inner lid that is detachably attachable to the shield body. The inner opening is formed in the region of the shield body that overlaps a portion of the outer opening when viewed in the direction from the outer opening to the oxidized lead.
    Type: Application
    Filed: March 23, 2017
    Publication date: October 5, 2017
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventor: Atsuko OKA
  • Patent number: 9777883
    Abstract: The present invention is such that a main body neither drops out nor is destroyed. A plurality of brackets (4), provided on a side surface of a main body (2) in which a superconducting magnet is mounted internally in a state in which each protrudes therefrom, are each supported by a stand (3) from the bottom, and enclosing members (5) are attached to the side surface of the main body (2) with a prescribed space (a) opened from the bottom of the brackets (4). At least part of the inside surface of an enclosing member (5) surrounds a stand (3) in a non-contact state.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: October 3, 2017
    Assignee: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Kazuhito Tago, Yoshio Okui, Masatoshi Yoshikawa
  • Patent number: 9655291
    Abstract: Provided is a multilayer magnetic shield 21 formed of magnetic materials and disposed on the outer side of a superconducting magnet 11, the multilayer magnetic shield 21 including a first magnetic shield 1 disposed on the outer side of the superconducting magnet 11 and a second magnetic shield 2 disposed on the outer side of the first magnetic shield 1. The first magnetic shield 1 includes a first cylinder section 1a enclosing the superconducting magnet 11 and a pair of first flange sections 1b connected to the first cylinder section 1a. The second magnetic shield 2 includes a second cylinder section 2a enclosing the first cylinder section 1a and a pair of second flange sections 2b connected to the second cylinder section 2a. The second cylinder section 2a is disposed in a position with a predetermined space S from the first cylinder section 1a in the radial direction of the first cylinder section 1a.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: May 16, 2017
    Assignees: Kobe Steel, Ltd., JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Osamu Ozaki, Yoshio Okui, Takeshi Kamikado
  • Patent number: 9567661
    Abstract: A reactor apparatus includes a first chamber coupled to a first source of vacuum, a monitor chamber isolated from the first chamber and coupled to a second source of vacuum, and at least one removable deposition monitor disposed in the monitor chamber.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 14, 2017
    Assignee: SUPERCONDUCTOR TECHNOLOGIES, INC.
    Inventors: Ward Ruby, Kurt Von Dessonneck, Brian Moeckly
  • Patent number: 9564258
    Abstract: A coated conductor comprises a substrate supporting a ReBCO superconductor adapted to carry current in a superconducting state. The superconductor is characterized in having peaks in critical current (Jc) of at least 0.2 MA/cm2 in a magnetic field of about 1 Tesla when the field is applied normal to the surface of the superconductor and when the field is applied parallel to the surface of the superconductor, and further characterized in that the superconductor includes horizontal defects and columnar defects in a size and an amount sufficient to result in the said critical current response. The conductor is characterized in that the ratio of the height of the peaks in the Jc is in the range from 3:1 with the ratio of the field perpendicular (0 degrees) to the field parallel (+/?90 degrees) to the range from 3:1 with the ratio of the field parallel to the field perpendicular.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: February 7, 2017
    Assignee: Superconductor Technologies, Inc.
    Inventor: Jeong-Uk Huh
  • Patent number: 9543754
    Abstract: An object of the present invention is to provide a method for protecting a superconducting coil, which method prevents damage to the superconducting coil caused by a quench or the like, in a new way, without using a voltage (a change in voltage) generated in the superconducting coil. Provided is the method for protecting a superconducting coil made by winding tape-like superconducting wire having a superconducting layer. Power from a power supply is shut off based on the magnitude of a screening field, which is a difference between a measured magnetic field B in a direction of a thickness of the superconducting wire at a predetermined position, and a magnetic field Bcal in the direction of the thickness of the superconducting wire calculated disregarding an effect of screening current.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: January 10, 2017
    Assignees: National Institute for Materials Science, Japan Superconductor Technology, Inc.
    Inventors: Davide Uglietti, Tsukasa Kiyoshi, Shinji Matsumoto, Mamoru Hamada
  • Publication number: 20160381843
    Abstract: Provided is a multilayer magnetic shield 21 formed of magnetic materials and disposed on the outer side of a superconducting magnet 11, the multilayer magnetic shield 21 including a first magnetic shield 1 disposed on the outer side of the superconducting magnet 11 and a second magnetic shield 2 disposed on the outer side of the first magnetic shield 1. The first magnetic shield 1 includes a first cylinder section 1a enclosing the superconducting magnet 11 and a pair of first flange sections 1b connected to the first cylinder section 1a. The second magnetic shield 2 includes a second cylinder section 2a enclosing the first cylinder section 1a and a pair of second flange sections 2b connected to the second cylinder section 2a. The second cylinder section 2a is disposed in a position with a predetermined space S from the first cylinder section 1a in the radial direction of the first cylinder section 1a.
    Type: Application
    Filed: June 21, 2016
    Publication date: December 29, 2016
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), JAPAN SUPERCONDUCTOR TECHNOLOGY INC
    Inventors: Osamu OZAKI, Yoshio OKUI, Takeshi KAMIKADO
  • Publication number: 20160369946
    Abstract: A cryostat includes a coolant tank, a refrigerator, a cylindrical member, and a gas phase volume-varying unit. The coolant tank houses a liquid coolant. The refrigerator is provided above the coolant tank and recondenses the coolant evaporated in the coolant tank. The cylindrical member houses a lower part of the refrigerator and forms a recondensing chamber that communicates with the coolant tank. The gas phase volume-varying unit communicates with a gas-phase space above a liquid surface of the liquid coolant in the coolant tank and varies a gas phase volume in the gas-phase space to cancel out a pressure fluctuation in the coolant tank.
    Type: Application
    Filed: June 24, 2014
    Publication date: December 22, 2016
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY, INC.
    Inventors: Kazuhito TAGO, Yasuhide NAGAHAMA, Kentaro KOMINATO
  • Publication number: 20160268874
    Abstract: Liquefier includes first compression section which is driven by a superconducting motor and which compresses a substance in a gaseous state. Cooling circuit includes: second compression section which is driven by the motor when first compression section is being driven by the motor and which compresses a refrigerant; first heat exchange section which cools the refrigerant by causing heat exchange between a substance in a tank and the compressed refrigerant; second expansion section which brings the refrigerant down to or below a critical temperature of a superconducting material by expanding the cooled refrigerant; and second heat exchange section which imparts cold heat of the refrigerant to the substance by causing heat exchange between the substance in the tank and the refrigerant after cooling a superconducting magnet, and supplies the refrigerant brought down to or below the critical temperature by second expansion section to the motor and cools the superconducting magnet.
    Type: Application
    Filed: March 4, 2016
    Publication date: September 15, 2016
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Kenichi INOUE, Kazuyoshi SAITOU, Kyoji ZAITSU, Koji INOUE, Satoshi ITO
  • Publication number: 20160215921
    Abstract: The present invention is such that a main body neither drops out nor is destroyed. A plurality of brackets (4), provided on a side surface of a main body (2) in which a superconducting magnet is mounted internally in a state in which each protrudes therefrom, are each supported by a stand (3) from the bottom, and enclosing members (5) are attached to the side surface of the main body (2) with a prescribed space (a) opened from the bottom of the brackets (4). At least part of the inside surface of an enclosing member (5) surrounds a stand (3) in a non-contact state.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 28, 2016
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY INC.
    Inventors: Kazuhito TAGO, Yoshio OKUI, Masatoshi YOSHIKAWA
  • Patent number: 9362025
    Abstract: This invention enables high temperature superconducting (HTS) metal oxide materials ReBa2Cu3Ox ((RE)BCO) to carry high superconducting currents at high current densities under high magnetic field (?3 Tesla), in all orientations of the field, and at high temperatures (65 Kelvin). The superconductor is adapted to carry current in a superconducting state, with the superconductor having a current (I) carrying capacity of at least 250 A/cm width, in a field of 3 Tesla (T), at 65 Kelvin (K), at all angles relative to the coated conductor. More preferably, the current carrying capacity extends through the range of substantially 250 A/cm to 500 A/cm. Excellent performance is achieved by use of intrinsic pinning centers in the HTS compound. The invention preferably does not require the addition of extra elements or compounds or particles to the superconducting compound during synthesis, nor does it require extra process steps.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: June 7, 2016
    Assignee: SUPERCONDUCTOR TECHNOLOGIES, INC.
    Inventors: Jeong-Uk Huh, Patrick Turner, Christopher Yung, Brian Moeckly, Viktor Gliantsev
  • Publication number: 20160131726
    Abstract: A magnetic field generation apparatus includes a main coil and a variable-current correction coil. The main coil is formed by winding a ReBCO-based superconductive wire rod and generates a magnetic field in a measurement space. The variable-current correction coil is variable in a value of a current, coaxial with the main coil and disposed inside the main coil, and generates a magnetic field which corrects a uniformity of the magnetic field generated by the main coil.
    Type: Application
    Filed: June 10, 2014
    Publication date: May 12, 2016
    Applicant: JAPAN SUPERCONDUCTOR TECHNOLOGY, INC.
    Inventors: Mamoru HAMADA, Hideaki MAEDA, Yoshinori YANAGISAWA, Hideki NAKAGOME