Patents by Inventor Katsuhiko Yamada

Katsuhiko Yamada 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: 20240154335
    Abstract: A terminal unit is provided with a male terminal and a female terminal. The female terminal includes a first wall portion and a second wall portion. The first wall portion includes a first resilient contact portion and a first contact point portion provided on the first resilient contact portion and to be brought into contact with a surface on one side of the male terminal. The first resilient contact portion biases the male terminal toward the second wall portion. The second wall portion includes a plurality of second resilient contact portions and a plurality of second contact point portions provided on the plurality of second resilient contact portions and to be brought into contact with a surface on the other side of the male terminal. The respective second resilient contact portions bias the male terminal toward the first wall portion.
    Type: Application
    Filed: March 1, 2022
    Publication date: May 9, 2024
    Inventors: Yusuke YAMADA, Katsuhiko AIZAWA
  • Publication number: 20240154366
    Abstract: Disclosed is a connector capable of improving heat dissipating performance while suppressing an increase in size.
    Type: Application
    Filed: March 1, 2022
    Publication date: May 9, 2024
    Inventors: Yusuke YAMADA, Katsuhiko AIZAWA, Kyohei IDA
  • Publication number: 20240128672
    Abstract: In a terminal unit, a second contact portion of a female terminal includes a push-up protrusion projecting toward a first contact portion and a pair of first projecting contact point portions, to be respectively brought into contact with a pair of inclined portions, of a male terminal. The male terminal includes an accommodation recess capable of accommodating the push-up protrusion. In an incomplete connection state, the male terminal is in contact with the push-up protrusion and pushed up toward the first contact portion, whereby the inclined portions of the male terminal are separated from the first projecting contact point portions of the female terminal. In a complete connection state, the inclined portions of the male terminal are pressed by the first projecting contact point portions of the female terminal.
    Type: Application
    Filed: February 18, 2022
    Publication date: April 18, 2024
    Inventors: Yusuke YAMADA, Katsuhiko AIZAWA
  • Patent number: 11692117
    Abstract: A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the particle, a peak indicating a carbon component is detected in a surface region by an X-ray photoelectron spectroscopy analysis.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: July 4, 2023
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Patent number: 11655056
    Abstract: An attitude control apparatus (20) includes an ideal thrust direction calculator (22), an ideal attitude calculator (24), a target attitude calculator (26), and a torque calculator (28). The ideal thrust direction calculator (22) calculates an ideal thrust direction of a thruster. The target attitude calculator (26) calculates a target attitude that is the attitude of a satellite in which a deviation from an ideal attitude is minimized within a movement limitation of an attitude control actuator (14) while a panel surface faces the sun. The torque calculator (28) calculates a torque for turning the satellite from an actual attitude to the target attitude and transmits a torque instruction to the attitude control actuator (14).
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 23, 2023
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenji Kitamura, Takeya Shima, Katsuhiko Yamada
  • Patent number: 11649171
    Abstract: A refrigerator is provided, including rare earth cold accumulating material particles filled in a cold accumulating vessel. The rare earth cold accumulating material particles are a rare earth oxide or a rare earth oxysulfide. The rare earth cold accumulating material particles define a sintered body. An average crystal grain size of the sintered body is 0.5 to 5 ?m, a porosity of the sintered body is 10 to 50 vol. %, and an average pore size of the sintered body is 0.3 to 3 ?m. In an arbitrary cross-section of the rare earth cold accumulating material particles, a number of pores per a unit area of 10 ?m×10 ?m is 20 to 70.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: May 16, 2023
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Publication number: 20220402633
    Abstract: In an orbital attitude control device (1150), an ideal thrust axis direction calculator (1505) calculates an ideal thrust axis direction based on information of a predetermined orbit, an ideal attitude calculator (1506) calculates an ideal attitude of the satellite based on the ideal thrust axis direction and a solar direction, and a control torque calculator (1510) calculates an ideal control torque that makes the attitude of the satellite follow the ideal attitude and a torque restraint plane in which the solar direction is orthogonal to a rotational axis of the solar array panel, defines an evaluation function obtained by weighting a distance from the ideal control torque and a distance from the torque restraint plane and then summing the weighted distances, and calculates the control torque that allows the drive constraint to be satisfied and the evaluation function to be minimized.
    Type: Application
    Filed: February 26, 2020
    Publication date: December 22, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenji KITAMURA, Takeya SHIMA, Katsuhiko YAMADA
  • Patent number: 11530846
    Abstract: A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: December 20, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Patent number: 11417449
    Abstract: A magnetic sheet 1 of an embodiment includes a stack of a plurality of magnetic thin strips and resin film parts. The stack includes from 5 to 25 pieces of the magnetic thin strips. The magnetic thin strips are provided with cutout portions each having a width of 1 mm or less (including 0 (zero)). A ratio (B/A) of a total length B of the cutout portions provided to the magnetic thin strip to a total outer peripheral length A of an outer peripheral area of the magnetic thin strip arranged on one of the resin film parts is in a range of from 2 to 25.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: August 16, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Takao Sawa, Katsuhiko Yamada, Tadao Saito
  • Patent number: 11167867
    Abstract: When calculating a gimbal angle trajectory that satisfies boundary conditions set by an attitude boundary condition setter 2131 of the ground station 21, a gimbal angle trajectory calculator 2132 calculates the gimbal angle trajectory that minimizes a period of an acceleration interval within a range that satisfies driving restrictions of a gimbal, based on a gimbal angle ?0i of a start time and a gimbal angle ?ci of a fixed interval of an attitude change. Also, the gimbal angle trajectory is calculated that minimizes a period of a deceleration interval within a range that satisfies the driving restrictions of the gimbal, based on the gimbal angle ?ci of the fixed interval and a gimbal angle ?fi of a completion time of the attitude change. The obtained ?0i, ?ci, ?fi and an attitude change period ? are transmitted to the artificial satellite as gimbal angle trajectory parameters, and the control moment gyros are controlled based on the gimbal angle trajectory parameters.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: November 9, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenji Kitamura, Takeya Shima, Katsuhiko Yamada
  • Patent number: 11136244
    Abstract: The present invention provides a rare earth cold accumulating material particle comprising a rare earth oxide or a rare earth oxysulfide, wherein the rare earth cold accumulating material particle is composed of a sintered body; an average crystal grain size of the sintered body is 0.5 to 5 ?m; a porosity of the sintered body is 10 to 50 vol. %; and an average pore size of the sintered body is 0.3 to 3 ?m. Further, it is preferable that the porosity of the rare earth cold accumulating material particle is 20 to 45 vol. %, and a maximum pore size of the rare earth cold accumulating material particle is 4 ?m or less. Due to this structure, there can be provided a rare earth cold accumulating material having a high refrigerating capacity and a high strength.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: October 5, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Publication number: 20210284548
    Abstract: The present invention provides a rare earth cold accumulating material particle comprising a rare earth oxide or a rare earth oxysulfide, wherein the rare earth cold accumulating material particle is composed of a sintered body; an average crystal grain size of the sintered body is 0.5 to 5 ?m; a porosity of the sintered body is 10 to 50 vol. %; and an average pore size of the sintered body is 0.3 to 3 ?m. Further, it is preferable that the porosity of the rare earth cold accumulating material particle is 20 to 45 vol. %, and a maximum pore size of the rare earth cold accumulating material particle is 4 ?m or less. Due to this structure, there can be provided a rare earth cold accumulating material having a high refrigerating capacity and a high strength.
    Type: Application
    Filed: May 26, 2021
    Publication date: September 16, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko YAMADA, Keiichi FUSE
  • Publication number: 20210245901
    Abstract: An attitude control apparatus (20) includes an ideal thrust direction calculator (22), an ideal attitude calculator (24), a target attitude calculator (26), and a torque calculator (28). The ideal thrust direction calculator (22) calculates an ideal thrust direction of a thruster. The target attitude calculator (26) calculates a target attitude that is the attitude of a satellite in which a deviation from an ideal attitude is minimized within a movement limitation of an attitude control actuator (14) while a panel surface faces the sun. The torque calculator (28) calculates a torque for turning the satellite from an actual attitude to the target attitude and transmits a torque instruction to the attitude control actuator (14).
    Type: Application
    Filed: September 13, 2019
    Publication date: August 12, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenji KITAMURA, Takeya SHIMA, Katsuhiko YAMADA
  • Publication number: 20210246351
    Abstract: A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the particle, a peak indicating a carbon component is detected in a surface region by an X-ray photoelectron spectroscopy analysis.
    Type: Application
    Filed: April 26, 2021
    Publication date: August 12, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko YAMADA, Keiichi FUSE
  • Patent number: 11059725
    Abstract: The present invention provides a rare earth cold accumulating material particle comprising a rare earth oxide or a rare earth oxysulfide, wherein the rare earth cold accumulating material particle is composed of a sintered body; an average crystal grain size of the sintered body is 0.5 to 5 ?m; a porosity of the sintered body is 10 to 50 vol. %; and an average pore size of the sintered body is 0.3 to 3 ?m. Further, it is preferable that the porosity of the rare earth cold accumulating material particle is 20 to 45 vol. %, and a maximum pore size of the rare earth cold accumulating material particle is 4 m or less. Due to this structure, there can be provided a rare earth cold accumulating material having a high refrigerating capacity and a high strength.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: July 13, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Patent number: 11015101
    Abstract: A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the particle, a peak indicating a carbon component is detected in a surface region by an X-ray photoelectron spectroscopy analysis.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: May 25, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Patent number: 10907081
    Abstract: Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: February 2, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Publication number: 20200348052
    Abstract: A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.
    Type: Application
    Filed: July 14, 2020
    Publication date: November 5, 2020
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS. CO., LTD.
    Inventors: Katsuhiko YAMADA, Keiichi FUSE
  • Patent number: 10753652
    Abstract: A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: August 25, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Katsuhiko Yamada, Keiichi Fuse
  • Patent number: 10752384
    Abstract: A satellite comprises thrusters disposed with the firing directions each facing away from the mass center of satellite and different from each other. A control amount calculator calculates control amounts of the mean orbital elements from the mean orbital elements and the temporal change rates of the mean orbital elements set by an orbit determiner, and the target values. A distributor calculates firing timings and firing amounts of the thrusters for realizing the control amounts of the mean orbital elements by expressing a motion of satellite with orbital elements, solving an equation taking into account coupling of an out-of-plane motion and an in-plane motion due to thruster disposition angles and thruster firing amounts at multiple times, and combining one or more thruster firings controlling mainly an out-of-the-orbit-plane direction and one or more thruster firings controlling mainly an in-the-orbit-plane direction.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: August 25, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Kitamura, Katsuhiko Yamada, Takeya Shima, Hiroshi Suenobu