Patents by Inventor Tatsuoki Nagaishi

Tatsuoki Nagaishi 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).

  • Publication number: 20240188452
    Abstract: A joined body includes: a first superconducting layer, a barrier layer arranged on the first superconducting layer, and a second superconducting layer arranged on the barrier layer. The first superconducting layer, the barrier layer, and the second superconducting layer are formed of a REBCO. A leak current from one of the first superconducting layer and the second superconducting layer to the other of the first superconducting layer and the second superconducting layer is blocked by the barrier layer.
    Type: Application
    Filed: January 6, 2022
    Publication date: June 6, 2024
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kotaro OHKI, Tatsuoki NAGAISHI
  • Patent number: 11980106
    Abstract: A persistent current switch includes a superconducting wire including a substrate and a superconducting layer disposed on the substrate, and a heater. The superconducting wire includes a surface including a first portion and a second portion that are disposed apart from each other along a longitudinal direction of the superconducting wire. The first portion and the second portion face each other. The heater is sandwiched between the first portion and the second portion.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: May 7, 2024
    Assignees: Sumitomo Electric Industries, Ltd., RIKEN, Japan Superconductor Technology, Inc.
    Inventors: Takashi Yamaguchi, Kotaro Ohki, Tatsuoki Nagaishi, Yoshinori Yanagisawa, Mamoru Hamada
  • Patent number: 11972898
    Abstract: A superconducting magnet according to one embodiment includes: a coil including a superconducting layer having a first portion and a second portion, and a joining portion; and a cryostat in which the coil is stored. The first portion and the second portion are located in a termination portion. The superconducting layer forms a closed loop by superconducting joining of the first portion and the second portion at the joining portion. The superconducting layer is made of a high-temperature superconductor. A current flows through the joining portion in a superconducting state when a magnetic field equal to or greater than 1.0 tesla and equal to or less than 5.0 tesla is applied to the joining portion at 77 kelvin. The cryostat is configured such that a temperature inside the cryostat is equal to or greater than 2.0 kelvin and equal to or less than 77 kelvin.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: April 30, 2024
    Assignees: RIKEN, Sumitomo Electric Industries, Ltd.
    Inventors: Hideaki Maeda, Yoshinori Yanagisawa, Kotaro Ohki, Tatsuoki Nagaishi
  • Publication number: 20240038427
    Abstract: A superconducting coil device according to one embodiment of the present invention includes: A superconducting coil device including: a bobbin having a tubular body; superconducting wires, a part of which constitutes a wound portion where the superconducting wires are wound on the bobbin; a bobbin-side guide portion holding the superconducting wires extending from the bobbin, the bobbin-side guide portion being provided to extend in a bobbin axial direction, which is an axial direction of the body of the bobbin; a first guide portion holding the superconducting wires extending from the bobbin-side guide portion, the first guide portion being arranged on an outer side of the bobbin-side guide portion in a direction intersecting the bobbin axial direction and provided to extend in the direction intersecting the bobbin axial direction; and a second guide portion capable of holding the superconducting wires extending from the first guide portion, the second guide portion being provided to extend in a direction in
    Type: Application
    Filed: October 11, 2021
    Publication date: February 1, 2024
    Applicants: JAPAN SUPERCONDUCTOR TECHNOLOGY INC., RIKEN, SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Masatoshi YOSHIKAWA, Yasuyuki MIYOSHI, Mamoru HAMADA, Kazuyoshi SAITO, Yoshinori YANAGISAWA, Renzhong PIAO, Kotaro OHKI, Takashi YAMAGUCHI, Tatsuoki NAGAISHI
  • Patent number: 11763965
    Abstract: An oxide superconducting thin film material includes: a metal substrate having a surface with a biaxially oriented crystal orientation structure; an intermediate layer biaxially oriented and formed on the metal substrate; and an oxide superconducting thin film formed on the intermediate layer and composed of a RE123-based oxide superconductor represented by REBa2Cu3Oy. The oxide superconducting thin film includes Br (bromine).
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 19, 2023
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takanori Motoki, Jun-ichi Shimoyama, Genki Honda, Tatsuoki Nagaishi
  • Patent number: 11715586
    Abstract: In a superconducting wire, a superconducting material joining layer joins a first end portion of a first superconducting material layer of a first wire and a second end portion of a second superconducting material layer of a second wire. The first wire and the second wire are disposed such that a first end face and a second end face are positioned to face in the same direction. The first wire further includes a first conductor layer disposed on the first main surface so as to be located adjacent to the first end portion. The second wire further includes a second conductor layer disposed on the second main surface so as to be located adjacent to the second end portion. The first conductor layer and the second conductor layer are connected to each other.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: August 1, 2023
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kotaro Ohki, Tatsuoki Nagaishi
  • Patent number: 11705253
    Abstract: A superconducting wire according to one embodiment of the present disclosure includes: a substrate having a first surface and a second surface; a superconducting layer having a third surface and a fourth surface; and respective coating layers. The second surface is opposite to the first surface. The fourth surface is opposite to the third surface. The superconducting layer is disposed on the substrate such that the third surface faces the second surface. The respective coating layers are disposed on the first surface and the fourth surface. Adhesion strength between the substrate and the coating layer disposed on the first surface is lower than adhesion strength between the superconducting layer and the coating layer disposed on the fourth surface.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 18, 2023
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yamaguchi, Tatsuoki Nagaishi, Masaya Konishi
  • Patent number: 11665982
    Abstract: A superconducting wire includes a substrate and a superconducting material layer. The substrate includes a first main surface and a second main surface opposite to the first main surface. The superconducting material layer is disposed on the first main surface. Along at least a part of the superconducting wire in a direction in which the superconducting wire extends, the superconducting material layer is disposed to cover a side surface of the substrate in a width direction of the substrate and cover at least a part of the second main surface. A thickness of the superconducting material layer located on the first main surface varies along the width direction. A maximum thickness of the superconducting material layer located on the second main surface is smaller than a maximum thickness of the superconducting material layer located on the first main surface.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: May 30, 2023
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yamaguchi, Tatsuoki Nagaishi, Masaya Konishi, Takeshi Yamana, Kenji Motoi
  • Publication number: 20220393680
    Abstract: A persistent current switch includes a superconducting wire, a heater, and an insulating member. The superconducting wire includes a substrate and a superconducting layer provided on the substrate. The superconducting layer includes a first principal surface facing the substrate and a second principal surface on an opposite side of the first principal surface. The heater is disposed only on the second principal surface side with respect to the superconducting layer. The insulating member is provided between the second principal surface of the superconducting layer and the heater.
    Type: Application
    Filed: June 25, 2020
    Publication date: December 8, 2022
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi YAMAGUCHI, Kotaro OHKI, Tatsuoki NAGAISHI
  • Publication number: 20220351880
    Abstract: A superconducting wire holding structure includes a holding member made of a first material, a superconducting wire disposed inside the holding member, and a filler made of a second material different from the first material. The superconducting wire includes a substrate, an intermediate layer formed on the substrate, a superconducting layer formed on the intermediate layer, and a first protective layer and a second protective layer that are formed on the superconducting layer. The superconducting layer includes a first portion, a second portion, and a third portion between the first portion and the second portion along a longitudinal direction of the superconducting wire. The first protective layer is formed on the first portion, and the second protective layer is formed on the second portion. The filler is filled between the third portion and the holding member.
    Type: Application
    Filed: August 31, 2020
    Publication date: November 3, 2022
    Applicants: Sumitomo Electric Industries, Ltd., RIKEN, Japan Superconductor Technology, Inc.
    Inventors: Takashi YAMAGUCHI, Kotaro OHKI, Tatsuoki NAGAISHI, Yoshinori YANAGISAWA, Mamoru HAMADA
  • Publication number: 20220344564
    Abstract: A persistent current switch includes a superconducting wire including a substrate and a superconducting layer disposed on the substrate, and a heater. The superconducting wire includes a surface including a first portion and a second portion that are disposed apart from each other along a longitudinal direction of the superconducting wire. The first portion and the second portion face each other. The heater is sandwiched between the first portion and the second portion.
    Type: Application
    Filed: August 31, 2020
    Publication date: October 27, 2022
    Applicants: Sumitomo Electric Industries, Ltd., RIKEN, Japan Superconductor Technology, Inc.
    Inventors: Takashi YAMAGUCHI, Kotaro OHKI, Tatsuoki NAGAISHI, Yoshinori YANAGISAWA, Mamoru HAMADA
  • Patent number: 11380463
    Abstract: A superconducting coil according to the present disclosure includes: a substrate having a first surface and a second surface; a superconducting layer having a third surface and a fourth surface; respective stabilization layers; and respective protective layers. The second surface is opposite to the first surface. The fourth surface is opposite to the third surface. The superconducting layer is disposed on the substrate such that the third surface faces the second surface. The respective stabilization layers are disposed on the first surface and the fourth surface. The respective protective layers are disposed on the stabilization layers. Adhesion strength between each of the stabilization layers and each of the protective layers is lower than strength of the superconducting layer.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 5, 2022
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yamaguchi, Tatsuoki Nagaishi, Masaya Konishi
  • Publication number: 20220115167
    Abstract: According to an embodiment, a superconducting wire includes a substrate, an intermediate layer formed on the substrate, a superconducting layer formed on the intermediate layer, and a protective layer formed on the superconducting layer. The superconducting layer has a first portion, a second portion, and a third portion between the first portion and the second portion in the longitudinal direction of the superconducting wire. The protective layer on the third portion is at least partially removed.
    Type: Application
    Filed: December 4, 2019
    Publication date: April 14, 2022
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi YAMAGUCHI, Kotaro OHKI, Tatsuoki NAGAISHI
  • Patent number: 11264151
    Abstract: A superconducting wire includes a multilayer stack and a covering layer (stabilizing layer or protective layer). The multilayer stack includes a substrate having a main surface and a superconducting material layer formed on the main surface. The covering layer (stabilizing layer or protective layer) is disposed on at least the superconducting material layer. A front surface portion of the covering layer (stabilizing layer or protective layer) located on the superconducting material layer (front surface portion of the stabilizing layer or upper surface of the protective layer) has a concave shape.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: March 1, 2022
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Yamaguchi, Tatsuoki Nagaishi, Masaya Konishi, Kotaro Ohki, Genki Honda, Tatsuhiko Yoshihara
  • Publication number: 20210257128
    Abstract: A superconductive wire according to an embodiment of the present disclosure includes a first member and a second member. The first member includes a first substrate made of a conductive material, a first intermediate layer made of a conductive material and disposed on the first substrate, and a first superconductive layer made of a superconductive material and disposed on the first intermediate layer. The second member includes a second substrate made of a conductive material, a second intermediate layer made of a conductive material and disposed on the second substrate, and a second superconductive layer made of a superconductive material and disposed on the second intermediate layer. The first member and the second member are stacked along a thickness direction of the superconductive wire so that the first superconductive layer and the second superconductive layer face each other. The first superconductive layer is electrically connected to the second superconductive layer.
    Type: Application
    Filed: June 15, 2018
    Publication date: August 19, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Tatsuoki NAGAISHI, Takashi YAMAGUCHI
  • Publication number: 20210134488
    Abstract: A superconducting coil according to the present disclosure includes: a substrate having a first surface and a second surface; a superconducting layer having a third surface and a fourth surface; respective stabilization layers; and respective protective layers. The second surface is opposite to the first surface. The fourth surface is opposite to the third surface. The superconducting layer is disposed on the substrate such that the third surface faces the second surface. The respective stabilization layers are disposed on the first surface and the fourth surface. The respective protective layers are disposed on the stabilization layers. Adhesion strength between each of the stabilization layers and each of the protective layers is lower than strength of the superconducting layer.
    Type: Application
    Filed: February 14, 2017
    Publication date: May 6, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi YAMAGUCHI, Tatsuoki NAGAISHI, Masaya KONISHI
  • Publication number: 20210090769
    Abstract: In a superconducting wire, a superconducting material joining layer joins a first end portion of a first superconducting material layer of a first wire and a second end portion of a second superconducting material layer of a second wire. The first wire and the second wire are disposed such that a first end face and a second end face are positioned to face in the same direction. The first wire further includes a first conductor layer disposed on the first main surface so as to be located adjacent to the first end portion. The second wire further includes a second conductor layer disposed on the second main surface so as to be located adjacent to the second end portion. The first conductor layer and the second conductor layer are connected to each other.
    Type: Application
    Filed: May 19, 2017
    Publication date: March 25, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Kotaro OHKI, Tatsuoki NAGAISHI
  • Patent number: 10886040
    Abstract: A superconducting wire includes a stack which includes: a first substrate having a first primary surface; a second substrate disposed opposite the first substrate; and a first superconducting material layer between the first primary surface and the second substrate. A ratio w/h of a width w of the superconducting wire to a height h of the superconducting wire in a cross section perpendicular to the longitudinal direction of the superconducting wire is 0.8 or greater and 10 or less. The width w is 2 mm or less.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: January 5, 2021
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Tatsuoki Nagaishi, Kotaro Ohki
  • Patent number: 10748678
    Abstract: This invention provides a substrate for a superconducting wire used for manufacturing a superconducting wire with excellent superconductivity and a method for manufacturing the same. Such substrate for a superconducting wire exhibits the crystal orientation of metals on the outermost layer, such as a c-axis orientation rate of 99% or higher, a ?? of 6 degrees or less, and a percentage of an area in which the crystal orientation is deviated by 6 degrees or more from the (001) [100] per unit area of 6% or less.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: August 18, 2020
    Assignees: Toyo Kohan Co., Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Teppei Kurokawa, Yusuke Hashimoto, Hironao Okayama, Tatsuoki Nagaishi, Kotaro Ohki, Genki Honda
  • Patent number: 10706991
    Abstract: There is provided a technique for producing a superconducting wire material in which the yield in a process of joining superconducting wire materials is improved over the related art. A method for producing a superconducting wire material lengthened by joining end portions of superconducting wire materials each having an oxide superconducting film, the end portions serving as joining surfaces, includes a step of disposing a micro-crystal of an oxide superconducting material on each of the joining surfaces of the oxide superconducting films, a pasting step of overlapping and pasting together the joining surfaces on which the micro-crystal is disposed, and a heat joining step of heating the overlapped joining surfaces to grow the micro-crystal, thereby forming, as a joining layer, a superconducting layer of the oxide superconducting material to join the joining surfaces to each other.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: July 7, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kotaro Ohki, Tatsuoki Nagaishi