Patents by Inventor Akihito Kinoshita

Akihito Kinoshita 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: 20210327620
    Abstract: A rare earth magnet includes a main phase and a particle boundary phase and in which an overall composition is represented by a formula, (R2(1-x)R1x)yFe(100-y-w-z-v)CowBzM1v.(R3(1-p)M2p)q.(R4(1-s)M3s)t, where R1 is a light rare earth element, R2 and R3 are a medium rare earth element, R4 is a heavy rare earth element, M1, M2, M3 are a predetermined metal element. The main phase includes a core portion, a first shell portion, and a second shell portion. The content proportion of medium rare earth element is higher in the first shell portion than in the core portion, the content proportion of medium rare earth element is lower in the second shell portion than in the first shell portion. The second shell portion contains heavy rare earth elements.
    Type: Application
    Filed: February 23, 2021
    Publication date: October 21, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu SAKUMA, Tetsuya SHOJI, Akihito KINOSHITA
  • Publication number: 20210272751
    Abstract: The production method of a rare earth magnet of the present disclosure includes a coated magnetic powder preparation step, a mixed powder preparation step, and a pressure sintering step. In the coated magnetic preparation step, a zinc-containing coating 12 is formed on the particle surface of a samarium-iron-nitrogen-based magnetic powder to obtain a coated magnetic powder 14. In the mixed powder preparation step, a binder powder 20 having a melting point not higher than the melting point of the coating 12 and the coated magnetic powder 14 are mixed to obtain a mixed powder. In the pressure sintering step, denoting as T1° C. the temperature at which the peak disappears in an X-ray diffraction pattern of the binder powder 20 and as T2° C. the temperature at which the magnetic phase in the samarium-iron-nitrogen-based magnetic powder 10 decomposes, the mixed powder is pressure-sintered at T1° C. or more and (T2?50)° C. or less.
    Type: Application
    Filed: December 29, 2020
    Publication date: September 2, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke ICHIGOZAKI, Tatsuhiko HIRANO, Noritsugu SAKUMA, Akihito KINOSHITA, Masaaki ITO
  • Publication number: 20200303998
    Abstract: A method of producing a motor core includes preparing a soft magnetic plate containing a transition metal element, preparing a modifying member containing an alloy having a melting point lower than a melting point of the soft magnetic plate, bringing the modifying member into contact with a part of a plate surface of the soft magnetic plate, causing the modifying member to diffuse and penetrate into the soft magnetic plate from a contact surface between the soft magnetic plate and the modifying member and forming a hard magnetic phase-containing part in a part of the soft magnetic plate, and laminating a plurality of soft magnetic plates on each other after the modifying member is brought into contact with the part of the plate surface of the soft magnetic plate.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 24, 2020
    Inventors: Akihito KINOSHITA, Noritsugu SAKUMA, Tetsuya SHOJI, Kosuke YONEKAWA
  • Publication number: 20200098497
    Abstract: To provide a rare earth magnet in which particles of SmFeN powder are bound using a Zn powder, wherein generation of a knick at a magnetic field of around 0 is prevented and high residual magnetic flux density Br is thereby achieved, and a production method thereof. A rare earth magnet including a main phase containing Sm, Fe, and N, at least a part of the main phase having a Th2Zn17-type or Th2Ni17-type crystal structure, a sub-phase containing Zn and Fe and being present around the main phase, and an intermediate phase containing Sm, Fe and N as well as Zn and being present between the main phase and the sub-phase, wherein the average Fe content in the sub-phase is 33 at % or less relative to the whole sub-phase.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 26, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOHOKU UNIVERSITY
    Inventors: Noritsugu SAKUMA, Tetsuya SHOJI, Akihito KINOSHITA, Kazuaki HAGA, Daisuke ICHIGOZAKI, Yukio TAKADA, Satoshi SUGIMOTO, Masashi MATSUURA
  • Publication number: 20200098496
    Abstract: To provide a rare earth magnet in which particles of SmFeN powder are bound using a Zn alloy powder, wherein generation of a knick at a magnetic field of around 0 is prevented, and a production method thereof. A rare earth magnet including a main phase containing Sm, Fe, and N, at least a part of the main phase having a Th2Zn17-type or Th2Ni17-type crystal structure, a sub-phase containing at least either Si or Sm, and Zn and Fe and being present around the main phase, and an intermediate phase containing Sm, Fe and N as well as Zn and being present between the main phase and the sub-phase, wherein the average Fe content in the sub-phase is 33 at % or less relative to the whole sub-phase, and the average total content of Si and Sm in the sub-phase is from 1.4 to 4.5 at % relative to the whole subs-phase.
    Type: Application
    Filed: September 19, 2019
    Publication date: March 26, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOHOKU UNIVERSITY
    Inventors: Akihito KINOSHITA, Noritsugu SAKUMA, Tetsuya SHOJI, Daisuke ICHIGOZAKI, Tatsuhiko HIRANO, Kazuaki HAGA, Yukio TAKADA, Satoshi SUGIMOTO, Masashi MATSUURA
  • Patent number: 9396857
    Abstract: There is provided a magnetic circuit including a first magnetic body configured to include a magnet and a yoke plate, and a second magnetic body. The yoke plate forms an opening space at a position facing the second magnetic body. The magnet is disposed in the opening space or at a position sandwiched between the yoke plates.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: July 19, 2016
    Assignee: Sony Corporation
    Inventors: Akihito Kinoshita, Hitoshi Kubota, Yasushi Tsuji, Shuichi Chihara, Masahiro Kobori, Junichiro Misawa
  • Patent number: 9324514
    Abstract: There is provided a key input device including a supporting member including groove portions inclined with respect to a horizontal direction, a plurality of keytops each including a sliding portion which is fitted in a corresponding groove portion of the groove portions and slides along the groove portion, and a control member configured to cause two or more keytops of the plurality of keytops to slide obliquely downward along the groove portions.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: April 26, 2016
    Assignee: Sony Corporation
    Inventors: Junichiro Misawa, Masahiro Kobori, Shuichi Chihara, Hitoshi Kubota, Akihito Kinoshita, Yasushi Tsuji
  • Publication number: 20140183019
    Abstract: There is provided a key input device including a supporting member including groove portions inclined with respect to a horizontal direction, a plurality of keytops each including a sliding portion which is fitted in a corresponding groove portion of the groove portions and slides along the groove portion, and a control member configured to cause two or more keytops of the plurality of keytops to slide obliquely downward along the groove portions.
    Type: Application
    Filed: December 20, 2013
    Publication date: July 3, 2014
    Applicant: Sony Corporation
    Inventors: Junichiro Misawa, Masahiro Kobori, Shuichi Chihara, Hitoshi Kubota, Akihito Kinoshita, Yasushi Tsuji
  • Publication number: 20140125436
    Abstract: There is provided a magnetic circuit including a first magnetic body configured to include a magnet and a yoke plate, and a second magnetic body. The yoke plate forms an opening space at a position facing the second magnetic body. The magnet is disposed in the opening space or at a position sandwiched between the yoke plates.
    Type: Application
    Filed: October 24, 2013
    Publication date: May 8, 2014
    Applicant: Sony Corporation
    Inventors: Akihito Kinoshita, Hitoshi Kubota, Yasushi Tsuji, Shuichi Chihara, Masahiro Kobori, Junichiro Misawa