Patents by Inventor Miho Yamaguchi

Miho Yamaguchi 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: 20230361705
    Abstract: A control apparatus is applied to a system that includes a rotating electric machine and an inverter. The inverter has, for each of a plurality of phases, upper-arm and lower-arm switches each of which has a diode connected in antiparallel thereto. The control apparatus includes an all-phase short-circuiting unit and a single-phase short-circuiting unit. The all-phase short-circuiting unit performs all-phase short-circuit control of turning on, for example, all the upper-arm switches of the plurality of phases while turning off all the lower-arm switches of the plurality of phases. The single-phase short-circuiting unit performs, in a regenerative drive state of the rotating electric machine and prior to execution of the all-phase short-circuit control, single-phase short-circuit control of turning on one of the upper-arm and lower-arm switches of one of the plurality of phases, turning off the other switch of the phase and turning off all the switches of the remaining phases.
    Type: Application
    Filed: July 20, 2023
    Publication date: November 9, 2023
    Applicant: DENSO CORPORATION
    Inventor: Miho YAMAGUCHI
  • Patent number: 10867729
    Abstract: Provided is a method for producing a sintered body that forms a rare-earth permanent magnet, has a single sintered structure and an arbitrary shape, and has easy magnetization axis orientations of different directions applied to the magnet material particles in a plurality of arbitrary regions. This method forms a three-dimensional first molded article from a composite material formed by mixing a resin material and magnet material particles containing a rare-earth substance. The first molded article is then subjected to a deforming force and a second molded article is formed in which the orientation direction of the easy magnetization axis of the magnet material particles in at least the one section of the horizontal cross-section is changed to a direction which differs from the orientation direction of the first molded article. The second molded article is heated to a sintering temperature and kept at the temperature for a period of time.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 15, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kenichi Fujikawa, Katsuya Kume, Kazuo Ouchi, Toshinobu Hoshino, Masakazu Morimoto, Hirofumi Ono, Katsuyuki Nakabayashi, Miho Yamaguchi, Hiroshi Matsuo, Toshiaki Okuno, Makoto Fujihara, Eiichi Imoto, Hirofumi Ebe, Tomohiro Omure, Izumi Ozeki, Takashi Yamamoto, Yuki Kato, Tomoya Matsuda, Shoichiro Saito
  • Patent number: 10544341
    Abstract: The present invention provides a thermal conductive polymer composition with low probability for mixing of an air bubble in a thermal conductive molded article, which is a thermal conductive polymer composition including thermal conductive inorganic particles having a specific particle size distribution and an electrically insulating polymer.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: January 28, 2020
    Assignees: NITTO DENKO CORPORATION, NITTO SHINKO CORPORATION
    Inventors: Kenichi Fujikawa, Yoshiharu Hatakeyama, Miho Yamaguchi, Yuji Yamagishi, Akihiro Oohashi
  • Publication number: 20180221951
    Abstract: Provided is a heretofore non-existing, novel rare-earth sintered magnet having both of an extremely low carbon content and an extremely small average particle size of magnet material particles. The sintered body for forming a rare-earth magnet comprises a large number of magnet material particles sintered together, wherein each of the magnet material particles contains a rare-earth substance and has an easy magnetization axis. This sintered body for forming a rare-earth magnet has a carbon content of 500 ppm or less, and the magnet material particles have an average particle size of 2 ?m or less.
    Type: Application
    Filed: July 29, 2016
    Publication date: August 9, 2018
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kenichi FUJIKAWA, Izumi OZEKI, Tomohiro OMURE, Miho YAMAGUCHI, Toshiaki OKUNO, Hiroshi MATSUO
  • Publication number: 20180130581
    Abstract: Provided is a method for producing a sintered body that forms a rare-earth permanent magnet, has a single sintered structure and an arbitrary shape, and has easy magnetization axis orientations of different directions applied to the magnet material particles in a plurality of arbitrary regions. This method forms a three-dimensional first molded article from a composite material formed by mixing a resin material and magnet material particles containing a rare-earth substance. The first molded article is then subjected to a deforming force and a second molded article is formed in which the orientation direction of the easy magnetization axis of the magnet material particles in at least the one section of the horizontal cross-section is changed to a direction which differs from the orientation direction of the first molded article. The second molded article is heated to a sintering temperature and kept at the temperature for a period of time.
    Type: Application
    Filed: March 24, 2016
    Publication date: May 10, 2018
    Inventors: Kenichi FUJIKAWA, Katsuya KUME, Kazuo OUCHI, Toshinobu HOSHINO, Masakazu MORIMOTO, Hirofumi ONO, Katsuyuki NAKABAYASHI, Miho YAMAGUCHI, Hiroshi MATSUO, Toshiaki OKUNO, Makoto FUJIHARA, Eiichi IMOTO, Hirofumi EBE, Tomohiro OMURE, Izumi OZEKI, Takashi YAMAMOTO, Yuki KATO, Tomoya MATSUDA, Shoichiro SAITO
  • Publication number: 20170187258
    Abstract: Raw material magnet is milled to magnet powder, and the magnet powder thus milled is mixed with a binder to form a compound 12. Then, the compound 12 thus formed is molded to a green sheet 14 having a sheet shape. Thereafter, a magnetic field orientation is carried out by applying a magnetic field to the green sheet 14 thus molded, and then, the green sheet 14 having been subjected to the magnetic field orientation is shaped to a product shape by deforming thereof. Thereafter, the permanent magnet 1 is produced by sintering thereof. The permanent magnet 1 has a ring shape, and is constituted such that an axis of easy magnetization may be orientated at a slant so as to converge in a direction along a converging axis P which is set to a radius direction as well as to a center direction of the ring shape.
    Type: Application
    Filed: May 25, 2015
    Publication date: June 29, 2017
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kenichi FUJIKAWA, Katsuya KUME, Toshinobu HOSHINO, Miho YAMAGUCHI, Masakazu MORIMOTO, Makoto FUJIHARA, Toshiaki OKUNO, Eiichi IMOTO, Hirofumi EBE, Tomohiro OMURE, Izumi OZEKI, Yuki KATO, Takashi YAMAMOTO, Shoichiro SAITO
  • Patent number: 9663635
    Abstract: The present invention provides, as an aluminum nitride powder excellent in the water resistance, an aluminum nitride powder subjected to a surface treatment with a predetermined organic compound. The present invention also provides a resin composition including the aluminum nitride powder and a resin, and a thermal conductive molded article obtained by molding the resin composition.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: May 30, 2017
    Assignees: NITTO DENKO CORPORATION, NITTO SHINKO CORPORATION
    Inventors: Yoshiharu Hatakeyama, Kenichi Fujikawa, Miho Yamaguchi, Yuji Yamagishi, Akihiro Oohashi
  • Publication number: 20170081579
    Abstract: The present invention provides a thermal conductive polymer composition with low probability for mixing of an air bubble in a thermal conductive molded article, which is a thermal conductive polymer composition including thermal conductive inorganic particles having a specific particle size distribution and an electrically insulating polymer.
    Type: Application
    Filed: December 16, 2014
    Publication date: March 23, 2017
    Applicants: NITTO DENKO CORPORATION, NITTO SHINKO CORPORATION
    Inventors: Kenichi FUJIKAWA, Yoshiharu HATAKEYAMA, Miho YAMAGUCHI, Yuji YAMAGISHI, Akihiro OOHASHI
  • Publication number: 20170066908
    Abstract: The present invention provides, as an aluminum nitride powder excellent in the water resistance, an aluminum nitride powder subjected to a surface treatment with a predetermined organic compound. The present invention also provides a resin composition including the aluminum nitride powder and a resin, and a thermal conductive molded article obtained by molding the resin composition.
    Type: Application
    Filed: December 16, 2014
    Publication date: March 9, 2017
    Applicants: NITTO DENKO CORPORATION, NITTO SHINKO CORPORATION
    Inventors: Yoshiharu HATAKEYAMA, Kenichi FUJIKAWA, Miho YAMAGUCHI, Yuji YAMAGISHI, Akihiro OOHASHI
  • Publication number: 20170022407
    Abstract: The present invention provides a thermal conductive polymer composition including aluminum nitride particles having a specific particle size distribution, and a polymer, as a polymer composition with low probability for mixing of an air bubble in a thermal conductive molded article, despite a high volume filling of aluminum nitride particle.
    Type: Application
    Filed: December 16, 2014
    Publication date: January 26, 2017
    Applicants: NITTO DENKO CORPORATION, NITTO SHINKO CORPORATION
    Inventors: Yoshiharu HATAKEYAMA, Kenichi FUJIKAWA, Miho YAMAGUCHI, Akihiro OOHASHI, Yuji YAMAGISHI
  • Publication number: 20150090922
    Abstract: A thermally conductive sheet is a thermally conductive sheet 1 formed from a thermally conductive composition containing boron nitride particles 2 in a plate shape and a rubber component. The content ratio of the boron nitride particles 2 is 35 vol % or more and the thermal conductivity in a direction perpendicular to a plane direction PD of the thermally conductive sheet 1 is 4 W/m·K or more.
    Type: Application
    Filed: February 7, 2013
    Publication date: April 2, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yoshiharu Hatakeyama, Kenichi Fujikawa, Miho Yamaguchi, Saori Yamamoto, Seiji Izutani
  • Publication number: 20140367883
    Abstract: A method for producing a thermally conductive sheet includes the steps of preparing a material component containing boron nitride particles in a plate shape and a polymer matrix, forming a long-length sheet from the material component with a calender, and pressing the long-length sheet.
    Type: Application
    Filed: February 7, 2013
    Publication date: December 18, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yoshiharu Hatakeyama, Saori Yamamoto, Miho Yamaguchi, Seiji Izutani, Kenichi Fujikawa
  • Patent number: 8828227
    Abstract: The present invention provides a resin porous membrane with an adhesive layer that exhibits excellent bonding precision and can be bonded to an adherend while maintaining the gas permeability of the porous membrane even when the porous membrane is small, and a method for producing the resin porous membrane with the adhesive layer. The present invention also provides the filter member including the resin porous membrane with the adhesive layer.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: September 9, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Yozo Nagai, Kouji Furuuchi, Miho Yamaguchi
  • Publication number: 20140213751
    Abstract: The present invention provides an epoxy resin molded article excellent in thermal conductivity and an epoxy composition suitable for forming such an epoxy resin molded article. Namely, the present invention relates to an epoxy composition containing an epoxy monomer having a mesogenic skeleton and a phenolic curing agent having a triphenyl methane structure.
    Type: Application
    Filed: January 31, 2014
    Publication date: July 31, 2014
    Applicant: Nitto Denko Corporation
    Inventors: Saori FUKUZAKI, Seiji IZUTANI, Miho YAMAGUCHI
  • Publication number: 20140008566
    Abstract: A method for producing a thermally conductive sheet, having a thermal conductivity in a direction perpendicular to a thickness direction of 10 W/m·K or more, includes a preparing step of preparing a resin composition containing a resin and a thermally conductive inorganic particle and a sheet forming step of forming a sheet by further increasing the viscosity after hot-pressing the resin composition to be brought from a melted state into a semi-solid state.
    Type: Application
    Filed: March 15, 2012
    Publication date: January 9, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hisae Kitagawa, Seiji Izutani, Takahiro Fukuoka, Miho Yamaguchi
  • Publication number: 20120193285
    Abstract: The present invention provides a resin porous membrane with an adhesive layer that exhibits excellent bonding precision and can be bonded to an adherend while maintaining the gas permeability of the porous membrane even when the porous membrane is small, and a method for producing the resin porous membrane with the adhesive layer. The present invention also provides the filter member including the resin porous membrane with the adhesive layer.
    Type: Application
    Filed: April 9, 2012
    Publication date: August 2, 2012
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yozo NAGAI, Kouji FURUUCHI, Miho YAMAGUCHI
  • Patent number: 8187511
    Abstract: The present invention provides a resin porous membrane with an adhesive layer that exhibits excellent bonding precision and can be bonded to an adherend while maintaining the gas permeability of the porous membrane even when the porous membrane is small, and a method for producing the resin porous membrane with the adhesive layer. The present invention also provides the filter member including the resin porous membrane with the adhesive layer.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: May 29, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Yozo Nagai, Kouji Furuuchi, Miho Yamaguchi
  • Patent number: 8055112
    Abstract: An optical waveguide film includes a clad layer having an adhesive function; and a core layer covered by the clad layer.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: November 8, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Masayuki Hodono, Kunio Nagasaki, Miho Yamaguchi, Shinji Inokuchi
  • Patent number: 8055113
    Abstract: An optical waveguide film includes a clad layer having an adhesive function; and a core layer covered by the clad layer.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: November 8, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Masayuki Hodono, Kunio Nagasaki, Miho Yamaguchi, Shinji Inokuchi
  • Publication number: 20110005677
    Abstract: An optical waveguide film includes a clad layer having an adhesive function; and a core layer covered by the clad layer.
    Type: Application
    Filed: September 7, 2010
    Publication date: January 13, 2011
    Applicant: Nitto Denko Corporation
    Inventors: Masayuki Hodono, Kunio Nagasaki, Miho Yamaguchi, Shinji Inokuchi