Patents by Inventor Kenichiro Nakajima

Kenichiro Nakajima 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: 20230334252
    Abstract: An information processing device includes an analyzing unit configured to analyze text data representing claims included in patent document data to identify constituent components of an invention for each claim included in the claims, and a display control unit configured to cause a display device to display texts indicating each claim in the claims, in a form in which the texts indicating each claim are partitioned into the constituent components.
    Type: Application
    Filed: December 17, 2020
    Publication date: October 19, 2023
    Inventors: Chinatsu TANABE, Hiroko TAKASHI, Nao TAKEUCHI, Eriko TAKEDA, Kenichiro NAKAJIMA, Tomoko MIYASHITA
  • Patent number: 11024448
    Abstract: An alloy for R-T-B-based rare earth sintered magnets which contains R which is a rare earth element; T which is a transition metal essentially containing Fe; a metallic element M containing one or more metals selected from Al, Ga and Cu; B and inevitable impurities, in which R accounts for 13 at % to 15 at %, B accounts for 4.5 at % to 6.2 at %, M accounts for 0.1 at % to 2.4 at %, T accounts for balance, a proportion of Dy in all rare earth elements is in a range of 0 at % to 65 at %, and the following Formula 1 is satisfied, 0.0049Dy+0.34?B/TRE?0.0049Dy+0.36??Formula 1 wherein Dy represents a concentration (at %) of a Dy element, B represents a concentration (at %) of a boron element, and TRE represents a concentration (at %) of all the rare earth elements.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: June 1, 2021
    Assignee: TDK CORPORATION
    Inventors: Kenichiro Nakajima, Takashi Yamazaki
  • Patent number: 10490324
    Abstract: In an alloy for an R-T-B-based rare earth sintered magnet of the present invention formed of a rare earth element R, a transition metal T containing Fe as a main component, a metal element M containing one or more types of metals selected from Al, Ga, and Cu, and B and inevitable impurities, 13 at % to 16 at % of R is contained, 4.5 at % to 6.2 at % of B is contained, 0.1 at % to 2.4 at % of M is contained, the balance is T and the inevitable impurities, a proportion of Dy in the entire rare earth element is 0 at % to 65 at %, Formula 1 described below is satisfied, a main phase containing R2Fe14B and an alloy grain boundary phase containing more R than the main phase are included, and a distance between the alloy grain boundary phases is greater than or equal to 3 ?m and less than or equal to 11 ?m. 0.30?B/TRE?0.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: November 26, 2019
    Assignee: TDK CORPORATION
    Inventors: Takashi Yamazaki, Kenichiro Nakajima, Akifumi Muraoka
  • Patent number: 10428408
    Abstract: An R-T-B-based rare earth sintered magnet, comprising a rare earth element R, B, a metallic element M which includes one or more metals selected from Al, Ga and Cu, a transition metal T which includes Fe as a main component, and inevitable impurities, wherein the sintered magnet includes 13 atom % to 15.5 atom % of R, 5.0 atom % to 6.0 atom % of B, 0.1 atom % to 2.4 atom % of M, and T and the inevitable impurities as a balance, and wherein the sintered magnet includes 0.015 atom % to 0.10 atom % of Zr as the transition metal T.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: October 1, 2019
    Assignee: TDK Corporation
    Inventors: Takashi Yamazaki, Akifumi Muraoka, Kenichiro Nakajima
  • Patent number: 10020097
    Abstract: A method of manufacturing an R-T-B rare earth sintered magnet includes a process of disposing and sintering a compact of a first alloy powder and an alloy material of a second alloy in a chamber of a sintering furnace. The first alloy consists of R which represents a rare earth element, T which represents a transition metal essentially containing Fe, a metal element M which represents Al and/or Ga, B, Cu, and inevitable impurities. The first alloy contains 11 at % to 17 at % of R, 4.5 at % to 6 at % of B, 0 at % to 1.6 at % of M, and T as the balance, and Dy content in all of the rare earth elements is 0 at % to 29 at %. The second alloy consists of R which represents a rare earth element, T which represents a transition metal essentially containing Fe, a metal element M which represents Al and/or Ga, B, Cu, and inevitable impurities. The second alloy contains 11 at % to 20 at % of R, 4.5 at % to 6 at % of B, and 0 at % to 1.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: July 10, 2018
    Assignee: SHOWA DENKO K.K.
    Inventors: Kenichiro Nakajima, Akifumi Muraoka, Takashi Yamazaki
  • Patent number: 9960335
    Abstract: Cracking in a thermoelectric element made of a filled-skutterudite-type alloy is suppressed. A p-type thermoelectric element includes: a p-type thermoelectric conversion layer made of an alloy having a filled-skutterudite structure containing antimony; a p-side first metal layer that contains titanium simple substances and iron simple substances, and is laminated on the p-type thermoelectric conversion layer; and a p-side second metal layer that contains titanium simple substances, and is laminated on the p-side first metal layer.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: May 1, 2018
    Assignee: SHOWA DENKO K.K.
    Inventors: Yasutaka Yoshida, Kenichiro Nakajima
  • Patent number: 9831799
    Abstract: A power converter device includes first through third semiconductor modules provided for phases of a three-phase inverter circuit, and incorporating upper and lower arms series circuit, and a flow path forming cabinet in a rectangular prism shape having an electric equipment containing space and a coolant flow path formed to surround the electric equipment containing space, the coolant flow path includes a first flow path provided along a first side face of the flow path forming cabinet, a second flow path provided along a second side face contiguous to one side of the first side face and connected to one end of the first flow path, and a third flow path provided along a third side face contiguous to other side of the first side face and connected to other end of the first flow path.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: November 28, 2017
    Assignee: Hitachi Automotive-Systems, Ltd.
    Inventors: Shuichi Shinohara, Kenichiro Nakajima, Kaname Sasaki
  • Publication number: 20170162305
    Abstract: In an alloy for an R-T-B-based rare earth sintered magnet of the present invention formed of a rare earth element R, a transition metal T containing Fe as a main component, a metal element M containing one or more types of metals selected from Al, Ga, and Cu, and B and inevitable impurities, 13 at % to 16 at % of R is contained, 4.5 at % to 6.2 at % of B is contained, 0.1 at % to 2.4 at % of M is contained, the balance is T and the inevitable impurities, a proportion of Dy in the entire rare earth element is 0 at % to 65 at %, Formula 1 described below is satisfied, a main phase containing R2Fe14B and an alloy grain boundary phase containing more R than the main phase are included, and a distance between the alloy grain boundary phases is greater than or equal to 3 ?m and less than or equal to 11 ?m. 0.30?B/TRE?0.
    Type: Application
    Filed: December 1, 2016
    Publication date: June 8, 2017
    Applicant: SHOWA DENKO K.K.
    Inventors: Takashi YAMAZAKI, Kenichiro NAKAJIMA, Akifumi MURAOKA
  • Patent number: 9654046
    Abstract: A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringes fixed to the inner wall surfaces of the housing, and the smoothing capacitor and rotating electric machine control circuit board are fixed.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: May 16, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Kenichiro Nakajima, Haruki Hamada, Hideyo Suzuki
  • Patent number: 9601979
    Abstract: An alloy material for an R-T-B system rare earth permanent magnet having a high orientation rate and high coercivity (Hcj), and a method for producing an R-T-B system rare earth permanent magnet using the alloy material. The alloy material includes a plurality of R-T-B system alloys having different compositions and a metal powder. The respective R-T-B system alloys are formed of R which is composed of two or more kinds selected from rare earth elements, T which is composed of a transition metal essentially containing Fe, B, and unavoidable impurities. A first alloy having the greatest Dy content contains 17 mass % or greater of Dy, and a Dy concentration difference between the first alloy and a second alloy having the smallest Dy concentration difference with respect to the first alloy among the plurality of R-T-B system alloys is 5 mass % or greater.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: March 21, 2017
    Assignee: SHOWA DENKO K.K.
    Inventors: Kenichiro Nakajima, Takashi Yamazaki
  • Patent number: 9558872
    Abstract: An R-T-B rare earth sintered magnet contains R which represents a rare earth element; T which represents a transition metal essentially containing Fe; a metal element M which represents Al and/or Ga; B; Cu; and inevitable impurities the R-T-B rare earth sintered magnet including 13.4 to 17 at % of R, 4.5 to 5.5 at % of B, and 0.1 to 2.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: January 31, 2017
    Assignee: SHOWA DENKO K.K.
    Inventors: Takashi Yamazaki, Kenichiro Nakajima
  • Publication number: 20170025207
    Abstract: An alloy for R-T-B-based rare earth sintered magnets which contains R which is a rare earth element; T which is a transition metal essentially containing Fe; a metallic element M containing one or more metals selected from Al, Ga and Cu; B and inevitable impurities, in which R accounts for 13 at % to 15 at %, B accounts for 4.5 at % to 6.2 at %, M accounts for 0.1 at % to 2.4 at %, T accounts for balance, a proportion of Dy in all rare earth elements is in a range of 0 at % to 65 at %, and the following Formula 1 is satisfied, 0.0049Dy+0.34?B/TRE?0.0049Dy+0.36 ??Formula 1 wherein Dy represents a concentration (at %) of a Dy element, B represents a concentration (at %) of a boron element, and TRE represents a concentration (at %) of all the rare earth elements.
    Type: Application
    Filed: July 25, 2016
    Publication date: January 26, 2017
    Applicant: SHOWA DENKO K.K.
    Inventors: Kenichiro NAKAJIMA, Takashi YAMAZAKI
  • Patent number: 9526194
    Abstract: A power conversion device includes a power semiconductor module that converts DC current into AC current, a capacitor for smoothing DC power, a first flow conduit defining member for defining a first flow conduit and for defining a first storage space in which the power semiconductor module is housed, and a second flow conduit defining member for defining a second flow conduit and for defining a second storage space in which the capacitor is housed. A first space, in which a vehicle component that is different from the power conversion device is disposed, is defined in a space to the side of the first flow conduit defining member and below the second flow conduit defining member.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: December 20, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yuki Fujita, Kenichiro Nakajima, Kaname Sasaki
  • Publication number: 20160284452
    Abstract: An R-T-B-based rare earth sintered magnet comprising: a rare earth element R, B, a metallic element M which includes one or more metals selected from Al, Ga and Cu, a transition metal T which includes Fe as a main component and inevitable impurities, wherein the sintered magnet includes: 13 to 15.5 atom % of R, 5.0 to 6.0 atom % of B, 0.1 to 2.4 atom % of M, and T and the inevitable impurities as a balance, and wherein the sintered magnet includes more than 0 atom % and 0.01 atom % or less of Tb as the rare earth element R.
    Type: Application
    Filed: March 21, 2016
    Publication date: September 29, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Masaki HORIKITA, Kenichiro NAKAJIMA, Akifumi MURAOKA
  • Publication number: 20160268024
    Abstract: An R-T-B-based rare earth sintered magnet, comprising a rare earth element R, B, a metallic element M which includes one or more metals selected from Al, Ga and Cu, a transition metal T which includes Fe as a main component, and inevitable impurities, wherein the sintered magnet includes 13 atom % to 15.5 atom % of R, 5.0 atom % to 6.0 atom % of B, 0.1 atom % to 2.4 atom % of M, and T and the inevitable impurities as a balance, and wherein the sintered magnet includes 0.015 atom % to 0.10 atom % of Zr as the transition metal T.
    Type: Application
    Filed: March 10, 2016
    Publication date: September 15, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Takashi YAMAZAKI, Akifumi MURAOKA, Kenichiro NAKAJIMA
  • Patent number: 9345150
    Abstract: Radiated noise caused by switching noise of power semiconductor elements in an electrical converter is reduced. The electrical converter is characterized in comprising: a case; a power module mounted on the case and comprising a plurality of power semiconductor elements; a metal plate mounted to the power module and fixed to the case; a control circuit board arranged on the metal plate, for controlling the power semiconductor elements; and a direct-current input terminal electrically connected to a battery. The electrical converter is also characterized in being provided at the bottom with a transmission or motor, and at the top with a connector for connecting the battery and the direct-current input terminal. The electrical converter is further characterized in that the metal plate is curved, and a portion of the curved metal plate is arranged in the space between the control circuit board and the direct-current input terminal.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: May 17, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Keisuke Fukumasu, Makoto Torigoe, Kenichiro Nakajima, Masayoshi Takahashi, Hiroki Funato
  • Publication number: 20160012946
    Abstract: Provided is a method of manufacturing an alloy for an R-T-B-based rare earth sintered magnet, with which an R-T-B-based magnet having high coercive force can be obtained even when the B concentration is low and the Dy concentration is zero or extremely low. This method includes: a casting step of manufacturing a cast alloy by casting a molten alloy, a hydrogenating step of absorbing hydrogen in the cast alloy; and a dehydrogenating step of removing hydrogen from the cast alloy absorbing hydrogen in an inert gas atmosphere at a temperature lower than 550° C., wherein the molten alloy consists of B, a rare earth element R, a transition metal T essentially containing Fe, a metal element M, and unavoidable impurities, in which the R content is 13 at % to 15.5 at %, the B content is 5.0 at % to 6.0 at %, the M content is 0.1 at % to 2.4 at %, the T content is a balance, a ratio of a Dy content to the total content of the rare earth element is 0 at % to 65 at %, and the molten alloy satisfies the below formula (1).
    Type: Application
    Filed: July 1, 2015
    Publication date: January 14, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Masaki HORIKITA, Takashi YAMAZAKI, Kenichiro NAKAJIMA
  • Publication number: 20150245535
    Abstract: A power conversion device that can be made smaller without degradation of its cooling performance is provided. This power conversion device includes a power semiconductor module that converts DC current into AC current, a capacitor for smoothing DC power, a first flow conduit defining member for defining a first flow conduit and for defining a first storage space in which the power semiconductor module is housed, and a second flow conduit defining member for defining a second flow conduit and for defining a second storage space in which the capacitor is housed.
    Type: Application
    Filed: October 2, 2013
    Publication date: August 27, 2015
    Inventors: Yuki Fujita, Kenichiro Nakajima, Kaname Sasaki
  • Publication number: 20150228880
    Abstract: Cracking in a thermoelectric element made of a filled-skutterudite-type alloy is suppressed. A p-type thermoelectric element includes: a p-type thermoelectric conversion layer made of an alloy having a filled-skutterudite structure containing antimony; a p-side first metal layer that contains titanium simple substances and iron simple substances, and is laminated on the p-type thermoelectric conversion layer; and a p-side second metal layer that contains titanium simple substances, and is laminated on the p-side first metal layer.
    Type: Application
    Filed: January 29, 2015
    Publication date: August 13, 2015
    Applicant: SHOWA DENKO K.K.
    Inventors: Yasutaka YOSHIDA, Kenichiro NAKAJIMA
  • Patent number: 9078376
    Abstract: A power conversion device includes: a cooling base 5 in which a flow passage 51 through which a cooling medium flows is formed and an opening portion 50 which is communicated with the flow passage 51 is formed; a power module 1; and a flow passage control portion 16b. The power module 1 has a bottomed cylindrical portion 13a in which a power semiconductor element is housed and which is inserted into the flow passage 51 through the opening portion 50, a flange portion 13b which is formed on an opening of the cylindrical portion 13a and is fixed to the cooling base 5 so as to close the opening portion 50, and a group of radiator fins 144 which are mounted on an outer peripheral surface of the cylindrical portion 13a with a gap of a predetermined distance formed between the flange portion 13b and the group of radiator fins 144.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: July 7, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Atsuo Nishihara, Kenichiro Nakajima, Keisuke Horiuchi