Patents by Inventor Koji Nakajima

Koji 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).

  • Patent number: 11512991
    Abstract: Provided is a thermal flow meter including a conductive measurement tube including an inlet through which liquid enters and an outlet through which the liquid exits and including an internal flow passage extending along an axis, and a sensor substrate including a heating resistance wire and a temperature detecting resistance wire formed on a detection surface along the axis, and in the detection surface, an insulation area is formed where the heating resistance wire and the temperature detecting resistance wire are coated with a thin-film insulating material, and the insulation area is joined to the measurement tube along the axis.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: November 29, 2022
    Assignee: SURPASS INDUSTRY CO., LTD.
    Inventors: Kazuo Abo, Koji Nakajima
  • Patent number: 11486828
    Abstract: A fluorescence photometer includes a photometer unit and an optical fiber unit. The photometer unit includes a light source, an excitation-side spectroscope for separating light emitted from the light source to generate excitation light, and a fluorescence-side spectroscope for separating fluorescent light emitted from a sample irradiated with the excitation light to generate monochromatic light. The optical fiber unit guides the excitation light to the sample placed outside the photometer unit and guides the fluorescent light emitted from the sample to the photometer unit and includes an image fiber for capturing an image of the sample, an excitation-side fiber arranged around the image fiber and for guiding the excitation light to the sample, and a fluorescence-side fiber arranged around the image fiber and to guide the fluorescent light emitted from the sample to the photometer unit. The excitation-side fiber and the fluorescence-side fiber are arranged to surround the image fiber.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: November 1, 2022
    Assignee: HITACHI HIGH-TECH SCIENCE CORPORATION
    Inventors: Jun Horigome, Kai Maruyama, Koji Kurita, Hideyuki Sakamoto, Rino Nakajima, Naoki Suzuki
  • Patent number: 11483419
    Abstract: A protocol converter is configured to be connectable between a field device and a device control apparatus and includes a converter controller and a converter storage. The converter controller acquires field data from the field device, writes the field data to the converter storage as a data set formed by a plurality of pieces of data and changes the value of a first counter controlled by the converter controller when the value of the first counter and the value of a second counter controlled by the device control apparatus are equal, and stops an operation to write the field data to the converter storage when the value of the first counter and the value of the second counter are different.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: October 25, 2022
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Shohei Toriumi, Koji Nagatomi, Hiroaki Nakajima, Hiroyuki Saito
  • Publication number: 20220315437
    Abstract: A system for processing a waste lithium-ion battery includes: a first aqueous solution generator that includes a first elution tank storing water, and that immerses an active material taken out from the waste lithium-ion battery in the water in the first elution tank and subjects the active material to carbon dioxide bubbling in the first elution tank to generate an aqueous solution of pH 5.5 to 8.5, in which lithium contained in the active material is eluted; a first solid-liquid separator that removes a solid component from the aqueous solution generated by the first aqueous solution generator; a first crystallizer that causes lithium carbonate to be deposited from the aqueous solution, from which the solid component has been removed by the first solid-liquid separator; and a second solid-liquid separator that performs solid-liquid separation on slurry containing the lithium carbonate deposited in the first crystallizer to take out the lithium carbonate.
    Type: Application
    Filed: February 26, 2020
    Publication date: October 6, 2022
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Fuminori ANDO, Hiroaki OSAWA, Shoji TAKADA, Chie NAKAJIMA, Mariko YAMASHITA, Masahiro SUGATA, Koji FUKUMOTO, Masaki TSUZAWA, Ryosuke NAGAI
  • Publication number: 20220264769
    Abstract: A power converter includes a cooler, a housing, a cooling plate, an insulating heat dissipation member, and a circuit board. The housing includes a bottom, a sidewall, and an internal space. The bottom is connected to the cooler. The cooling plate is connected to the bottom so as to stand upright with respect to the bottom. The insulating heat dissipation member is disposed on the cooling plate. The circuit board is connected to the cooling plate with the insulating heat dissipation member interposed therebetween. The cooling plate, the insulating heat dissipation member, and the circuit board are accommodated in the internal space of the housing. The cooling plate is disposed with a gap from the sidewall.
    Type: Application
    Filed: August 26, 2020
    Publication date: August 18, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yu KISHIWADA, Koji NAKAJIMA, Taro KIMURA, Kenichi TAMURA, Yoshikazu NOZUKI, Masaya NONOMURA, Kenta FUJII
  • Patent number: 11350517
    Abstract: A circuit device capable of significantly improving heat dissipation performance of a printed circuit board without increasing the size includes a printed circuit board, a mounted component, a non-solid metal spacer, a cooler, and a resin layer. The mounted component is at least partially disposed on at least one main surface of printed circuit board. The non-solid metal spacer is disposed at least on one main surface of the printed circuit board. The cooler is disposed at the non-solid metal spacer on the opposite side to the printed circuit board. The resin layer is disposed between the non-solid metal spacer and the cooler. The non-solid metal spacer has a shape that allows at least one hollow portion to be formed between the printed circuit board and the cooler.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: May 31, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Yahara, Kenta Fujii, Yuji Shirakata, Tomohito Fukuda, Takashi Kumagai, Koji Nakajima
  • Publication number: 20220103075
    Abstract: A power converter includes a circuit board, a first magnetic core, and a housing. The circuit board includes an insulating substrate and a first coil conductor. The insulating substrate includes a first side surface. The first magnetic core includes a first magnetic core member and a second magnetic core member. A first side surface of the insulating substrate is opposed to a first portion of the housing and is spaced away from the first portion of the housing. The first magnetic core member and the second magnetic core member are both thermally connected to the first portion.
    Type: Application
    Filed: September 13, 2019
    Publication date: March 31, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenichi TAMURA, Koji NAKAJIMA, Yoshikazu NOZUKI, Masaya NONOMURA, Taro KIMURA, Yu KISHIWADA
  • Patent number: 11239021
    Abstract: An isolated converter reduced in size compared with a conventional isolated converter and having a high heat dissipation characteristic is provided. The isolated converter includes a multilayer substrate having a first through hole and a magnetic core partially passing through the first through hole. The multilayer substrate includes a first conductor pattern formed at a position overlapping the magnetic core on a second surface when viewed from a direction orthogonal to a first surface, a second conductor pattern formed between the first surface and the second surface at a position overlapping the magnetic core and the first conductor pattern when viewed from the direction orthogonal to the first surface, at least one thermal conductive member formed on the first conductor pattern and having a portion disposed between the multilayer substrate and the magnetic core, and an electric insulating layer electrically insulating the first conductor pattern from the second conductor pattern.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: February 1, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Nakajima, Shota Sato, Yuji Shirakata, Kenta Fujii, Jun Tahara
  • Patent number: 11206729
    Abstract: Provided is a highly reliable power circuit device. The power circuit device includes a printed substrate, a power circuit, and a housing. The power circuit is formed on the printed substrate. The housing is connected with the printed substrate. The power circuit includes secondary-side switching elements, at least one smoothing choke coil, and smoothing capacitors. Portions of a smoothing choke coil core serving as a core of the smoothing choke coil are inserted in opening portions formed in the printed substrate. A winding of the smoothing choke coil is formed on the printed substrate. The smoothing choke coil is located between a region C in which the smoothing capacitors are arranged and regions A and B serving as a second region in which primary-side switching elements and the secondary-side switching elements serving as electric elements are arranged.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: December 21, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shota Sato, Koji Nakajima, Takashi Kumagai, Yuji Shirakata
  • Patent number: 11143536
    Abstract: A thermal flowmeter including a measurement tube that has an inflow port into which a liquid flows and an outflow port that allows the liquid which flows in from the inflow port to flow out, and has an internal flow passage where the liquid flows formed to extend along an axis, and a plurality of detection sections each of which has a heating resistor and a temperature detecting resistor along the axis and is provided at the measurement tube, and a control section that calculates a flow rate of the liquid flowing through the internal flow passage based on signals from the plurality of detection sections, wherein the plurality of detection sections are respectively provided with predetermined intervals left in a circumferential direction with the axis as a center.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: October 12, 2021
    Assignee: Surpass Industry, Co., Ltd.
    Inventors: Hiroshi Imai, Koji Nakajima, Kazuo Abo
  • Publication number: 20210274678
    Abstract: Provided is an electric power converter, including: a casing; a heat radiating plate having a first main surface and a second main surface; and a substrate which is fixed to the main surface and to which a heat generating component is mounted, wherein the casing has an inner wall surface in which a first tapered portion is formed, wherein the heat radiating plate includes a second tapered portion which is connected to the first tapered portion in a heat exchangeable manner and slid with respect to the first tapered portion, wherein the heat radiating plate is configured to be displaced in a first direction with respect to the casing by the second tapered portion being slid with respect to the first tapered portion, and wherein the heat generating component is connected to the casing in a heat exchangeable manner by the heat radiating plate being displaced in the first direction.
    Type: Application
    Filed: August 26, 2019
    Publication date: September 2, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshikazu NOZUKI, Koji NAKAJIMA, Kenichi TAMURA, Taro KIMURA, Yu KISHIWADA, Masaya NONOMURA
  • Publication number: 20210262843
    Abstract: Provided is a thermal flow meter including a conductive measurement tube including an inlet through which liquid enters and an outlet through which the liquid exits and including an internal flow passage extending along an axis, and a sensor substrate including a heating resistance wire and a temperature detecting resistance wire formed on a detection surface along the axis, and in the detection surface, an insulation area is formed where the heating resistance wire and the temperature detecting resistance wire are coated with a thin-film insulating material, and the insulation area is joined to the measurement tube along the axis.
    Type: Application
    Filed: February 11, 2021
    Publication date: August 26, 2021
    Inventors: Kazuo Abo, Koji Nakajima
  • Patent number: 11094452
    Abstract: A power converter includes a magnetic core, a plurality of windings, a plurality of metal sidewalls, a first insulating member, and a second insulating member. The plurality of windings are each wound around the magnetic core and bent to have a portion extending in a direction in which the magnetic core extends. The plurality of metal sidewalls are disposed outside the plurality of windings and extend in the direction in which the magnetic core extends. The first insulating member is disposed between the plurality of windings and between the windings and the magnetic core. The second insulating member is disposed on an outside of the plurality of windings and in contact with each of the plurality of sidewalls and each of the plurality of windings. The second insulating member has a thermal conductivity higher than a thermal conductivity of the first insulating member.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: August 17, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koji Nakajima, Takashi Kumagai, Jun Tahara
  • Publication number: 20210233695
    Abstract: Provided is a power conversion device, including: a casing having a recessed portion; a magnetic component accommodated in the recessed portion of the casing; a heat radiation plate, which covers an opening of the recessed portion of the casing, and is thermally coupled to the magnetic component; and a fixing band wound around the magnetic component and the heat radiation plate to fix the magnetic component to the heat radiation plate, wherein at least a part of the fixing band is accommodated in a band accommodating groove formed in the recessed portion of the casing. With this configuration, assembly dimensional tolerance caused between the magnetic component and the heat radiation plate can be eliminated and it is therefore possible to maintain high output and achieve downsizing.
    Type: Application
    Filed: June 3, 2019
    Publication date: July 29, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yu KISHIWADA, Koji NAKAJIMA, Kenichi TAMURA, Taro KIMURA, Yoshikazu NOZUKI, Masaya NONOMURA
  • Patent number: 11049640
    Abstract: A circuit device and a power converter include a core, a coil surrounding at least a part of the core, and a first heat transfer member being in surface contact with the core. A temperature rise of the core can thus be prevented or reduced.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: June 29, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenta Fujii, Koji Nakajima, Yuji Shirakata, Jun Tahara, Takashi Kumagai
  • Patent number: 11031177
    Abstract: A power converter includes a magnetic core and a plurality of windings. The plurality of windings are each wound around the magnetic core and bent to have a portion extending in the direction in which the magnetic core extends. Each of the plurality of windings is bent to include a region located farthest out from the magnetic core among all of the plurality of windings.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: June 8, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koji Nakajima, Takashi Kumagai, Jun Tahara
  • Patent number: 10916367
    Abstract: A printed circuit board includes at least one of a first coil pattern disposed on a first main surface and a second coil pattern disposed on a second main surface. The first coil pattern includes a first portion arranged between a first core portion and a second core portion. The second coil pattern includes a third portion arranged between the first core portion and the second core portion. A first heat transfer member is mounted on at least one of the first portion and the third portion. Therefore, temperature increase of at least one of the first portion and the third portion can be suppressed.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: February 9, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazuaki Fukui, Koji Nakajima, Shota Sato, Kenta Fujii
  • Patent number: 10912232
    Abstract: In an electronic circuit board of a power conversion device or the like, heat interference between parts mounted on a multi-layer printed circuit board is suppressed in order to place the mounted parts close to each other. The mounted parts include a semiconductor element and a magnetic part formed by a coil pattern, which is made from a copper foil of the printed circuit board, and by a magnetic core. A screw fixing portions is placed in the surroundings of the semiconductor element and the coil pattern. A heat radiation pattern connected to the screw fixing portion is provided between and around the semiconductor element and the coil pattern when viewed from a direction perpendicular to a principal surface of the multi-layer printed circuit board. The screw fixing portion is connected to a cooler in a manner that gives the screw fixing portion heat conductance and electrical conductance.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 2, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koji Nakajima, Yuji Shirakata, Kenta Fujii, Shota Sato
  • Publication number: 20200367353
    Abstract: A circuit device capable of significantly improving heat dissipation performance of a printed circuit board without increasing the size includes a printed circuit board, a mounted component, a non-solid metal spacer, a cooler, and a resin layer. The mounted component is at least partially disposed on at least one main surface of printed circuit board. The non-solid metal spacer is disposed at least on one main surface of the printed circuit board. The cooler is disposed at the non-solid metal spacer on the opposite side to the printed circuit board. The resin layer is disposed between the non-solid metal spacer and the cooler. The non-solid metal spacer has a shape that allows at least one hollow portion to be formed between the printed circuit board and the cooler.
    Type: Application
    Filed: January 18, 2019
    Publication date: November 19, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroyuki YAHARA, Kenta FUJII, Yuji SHIRAKATA, Tomohito FUKUDA, Takashi KUMAGAI, Koji NAKAJIMA
  • Publication number: 20200337930
    Abstract: A moving unit includes a housing, a rotary unit to which a rod part is attached, a spring that generates a torque when the rod part is tilted down or tilted up about a rotation axis on the side on which a base portion of the rod part is located, and a torque adjustment unit that is capable of adjusting a torque by deforming the spring. The torque adjustment unit includes a spring deforming portion that deforms the spring in a direction in which the spring is wound up and a spring fixing portion that keeps a torque constant by coming into contact with the spring deforming portion and fixing the spring deforming portion in place.
    Type: Application
    Filed: November 17, 2017
    Publication date: October 29, 2020
    Applicant: TAKARA BELMONT CORPORATION
    Inventors: Koji NAKAJIMA, Hiroyuki TERAYAMA