Patents by Inventor Kazuhiro Kuroda

Kazuhiro Kuroda 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: 10218170
    Abstract: A current-limiting device is a current-limiting device that uses a superconductor to perform a current-limiting operation, the current-limiting device including: a superconducting current-limiting element including the superconductor; a capacitor; a reactor; and a bypass switch. The series capacitor is connected in series to the superconducting current-limiting element. The current-limiting reactor is further connected in series to a series circuit including the superconducting current-limiting element and the series capacitor. The thyristor switch is connected in parallel to the series circuit.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: February 26, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Shigeki Isojima, Shuichi Nogawa, Kouji Noguchi, Kazuhiro Kuroda
  • Patent number: 10014637
    Abstract: A device is equipped with an electrical connector in the form of a receptacle that is subject to liquid intrusion. The device detects the insertion of a mating connector and optionally detects the presence of liquid in the receptacle by applying a low power, pulsed sense signal to a terminal pin of the receptacle while the terminal pin is decoupled from a circuit part to which the terminal pin is normally coupled and concurrently sensing a voltage coupled from the terminal pin and comparing the voltage to at least a predetermined lower voltage bound and optionally a predetermined upper voltage bound and based on the results of those comparison deduces the presence of a mating connector or optionally the presence of liquid in the receptacle.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: July 3, 2018
    Assignee: Sony Mobile Communications Inc.
    Inventors: Hiroyuki Hasegawa, Mikio Daigo, Kazuhiro Kuroda, Hiroki Nitta
  • Patent number: 9762051
    Abstract: A current-limiting and power-flow control device according to the present invention includes a superconducting current-limiting element including a superconductor, a series capacitor, and a parallel circuit. The series capacitor is connected in series with the superconducting current-limiting element. The parallel circuit includes a reactor connected in parallel with a series circuit including the superconducting current-limiting element and the series capacitor. Accordingly, overcurrent at the time of occurrence of a fault causes transition of the superconductor of the superconducting current-limiting element to the normal conducting state, and thus causes autonomous current-limiting operation of the superconducting current-limiting element. Thus, application of an excessive load across the terminals of the series capacitor due to the aforementioned fault can surely be prevented.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: September 12, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Shigeki Isojima, Shuichi Nogawa, Kouji Noguchi, Kazuhiro Kuroda
  • Publication number: 20170110835
    Abstract: A device is equipped with an electrical connector in the form of a receptacle that is subject to liquid intrusion. The device detects the insertion of a mating connector and optionally detects the presence of liquid in the receptacle by applying a low power, pulsed sense signal to a terminal pin of the receptacle while the terminal pin is decoupled from a circuit part to which the terminal pin is normally coupled and concurrently sensing a voltage coupled from the terminal pin and comparing the voltage to at least a predetermined lower voltage bound and optionally a predetermined upper voltage bound and based on the results of those comparison deduces the presence of a mating connector or optionally the presence of liquid in the receptacle.
    Type: Application
    Filed: October 20, 2015
    Publication date: April 20, 2017
    Applicant: Sony Mobile Communications Inc.
    Inventors: Hiroyuki HASEGAWA, Mikio DAIGO, Kazuhiro KURODA, Hiroki NITTA
  • Publication number: 20160020604
    Abstract: A current-limiting and power-flow control device according to the present invention includes a superconducting current-limiting element including a superconductor, a series capacitor, and a parallel circuit. The series capacitor is connected in series with the superconducting current-limiting element. The parallel circuit includes a reactor connected in parallel with a series circuit including the superconducting current-limiting element and the series capacitor. Accordingly, overcurrent at the time of occurrence of a fault causes transition of the superconductor of the superconducting current-limiting element to the normal conducting state, and thus causes autonomous current-limiting operation of the superconducting current-limiting element. Thus, application of an excessive load across the terminals of the series capacitor due to the aforementioned fault can surely be prevented.
    Type: Application
    Filed: March 26, 2014
    Publication date: January 21, 2016
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Shigeki ISOJIMA, Shuichi NOGAWA, Kouji NOGUCHI, Kazuhiro KURODA
  • Publication number: 20160013635
    Abstract: A current-limiting device is a current-limiting device that uses a superconductor to perform a current-limiting operation, the current-limiting device including: a superconducting current-limiting element including the superconductor; a capacitor; a reactor; and a bypass switch. The series capacitor is connected in series to the superconducting current-limiting element. The current-limiting reactor is further connected in series to a series circuit including the superconducting current-limiting element and the series capacitor. The thyristor switch is connected in parallel to the series circuit.
    Type: Application
    Filed: March 26, 2014
    Publication date: January 14, 2016
    Inventors: Shigeki ISOJIMA, Shuichi NOGAWA, Kouji NOGUCHI, Kazuhiro KURODA
  • Patent number: 9166436
    Abstract: A portable electronic device including a battery, a direct current (DC) power source, a first device that consumes a first amount of power during operation, a second device that consumes a second amount of power during operation, the second amount of power being more than the first amount of power, a first switch provided in a charging path between the DC power source and the battery, a second switch provided in a path for supplying power from the battery to the second device, and a charging control circuit that controls charging the battery by connecting the first switch when external power is supplied via the DC power source, and control the second switch to be connected and the first switch to be disconnected when the second device is operated during the charging.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: October 20, 2015
    Assignees: SONY CORPORATION, SONY MOBILE COMMUNICATIONS INC.
    Inventors: Hiroshi Izumi, Kazuhiro Kuroda, Takaki Kanno
  • Publication number: 20110254501
    Abstract: A portable electronic device including a battery, a direct current (DC) power source, a first device that consumes a first amount of power during operation, a second device that consumes a second amount of power during operation, the second amount of power being more than the first amount of power, a first switch provided in a charging path between the DC power source and the battery, a second switch provided in a path for supplying power from the battery to the second device, and a charging control circuit that controls charging the battery by connecting the first switch when external power is supplied via the DC power source, and control the second switch to be connected and the first switch to be disconnected when the second device is operated during the charging.
    Type: Application
    Filed: December 20, 2010
    Publication date: October 20, 2011
    Applicant: SONY ERICSSON MOBILE COMMUNICATIONS JAPAN, INC.
    Inventors: Hiroshi IZUMI, Kazuhiro Kuroda, Takaki Kanno
  • Patent number: 7387766
    Abstract: An exhaust-gas purifying apparatus includes a mantle, a support, and a catalytic layer. The support is disposed in the mantle, and is formed as at least one shape selected from the group consisting of cylinder shapes and corrugated shapes. The catalytic layer is loaded on at least one of the surfaces of the support. Moreover, the support includes at least two support elements disposed in the axial direction of the mantle, and the two support elements neighboring in the axial direction of the mantle are disposed out of phase with each other in the peripheral direction of the mantle. The exhaust-gas purifying apparatus shows not only an enhanced exhaust-gas purifying ability but also high misfire resistance.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: June 17, 2008
    Assignee: Cataler Corporation
    Inventors: Kazuhiro Kuroda, Masayasu Sato, Yasuo Kato
  • Patent number: 7374727
    Abstract: An exhaust-gas purifying apparatus includes an outer cylinder, a plurality of cylinder-shaped supports, and a catalytic layer. The cylinder-shaped supports are disposed in the outer cylinder, and have an outer peripheral surface and an inner peripheral surface. At least two of the neighboring cylinder-shaped supports contact with each other with the outer peripheral surfaces. The catalytic layer is loaded on at least one of the outer peripheral surface and inner peripheral surface of the cylinder-shaped supports. At least one of the cylinder-shaped supports has a ring-shaped cross-section with a cut-off, and is disposed in the outer cylinder in such an elastically deformed state that it expands in the centrifugal direction. Thus, the exhaust-gas purifying apparatus not only shows a high exhaust-gas purifying ability, but also is good in terms of the assemblage easiness. Moreover, the exhaust-gas purifying apparatus exhibits improved misfire resistance.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: May 20, 2008
    Assignee: Cataler Corporation
    Inventors: Masayasu Sato, Yasuo Kato, Kazuhiro Kuroda
  • Publication number: 20040096374
    Abstract: An exhaust-gas purifying apparatus includes a mantle, a support, and a catalytic layer. The support is disposed in the mantle, and is formed as at least one shape selected from the group consisting of cylinder shapes and corrugated shapes. The catalytic layer is loaded on at least one of the surfaces of the support. Moreover, the support includes at least two support elements disposed in the axial direction of the mantle, and the two support elements neighboring in the axial direction of the mantle are disposed out of phase with each other in the peripheral direction of the mantle. The exhaust-gas purifying apparatus shows not only an enhanced exhaust-gas purifying ability but also high misfire resistance.
    Type: Application
    Filed: September 8, 2003
    Publication date: May 20, 2004
    Applicant: CATALER CORPORATION
    Inventors: Kazuhiro Kuroda, Masayasu Sato
  • Publication number: 20040096373
    Abstract: An exhaust-gas purifying apparatus includes an outer cylinder, a plurality of cylinder-shaped supports, and a catalytic layer. The cylinder-shaped supports are disposed in the outer cylinder, and have an outer peripheral surface and an inner peripheral surface. At least two of the neighboring cylinder-shaped supports contact with each other with the outer peripheral surfaces. The catalytic layer is loaded on at least one of the outer peripheral surface and inner peripheral surface of the cylinder-shaped supports. At least one of the cylinder-shaped supports has a ring-shaped cross-section with a cut-off, and is disposed in the outer cylinder in such an elastically deformed state that it expands in the centrifugal direction. Thus, the exhaust-gas purifying apparatus not only shows a high exhaust-gas purifying ability, but also is good in terms of the assemblage easiness. Moreover, the exhaust-gas purifying apparatus exhibits improved misfire resistance.
    Type: Application
    Filed: September 8, 2003
    Publication date: May 20, 2004
    Applicant: CATALER CORPORATION
    Inventors: Masayasu Sato, Yasuo Kato, Kazuhiro Kuroda
  • Patent number: 5443913
    Abstract: In a magnetic recording medium comprising on a non-magnetic substrate a magnetic layer obtained by dispersing ferromagnetic powder in an electron beam-curable resin followed by electron beam curing or a backcoat layer obtained by curing an electron beam-curable resin with electron beams, a combination of an electron beam-curable vinyl chloride resin having a sulfur-containing polar group and an electron beam-curable urethane resin having a phosphorus-containing polar group is used as the electron beam-curable resin. This results in improvements in dispersibility, surface smoothness, and electromagnetic characteristics, as well as a lowering of error rate in high density digital recording. Storage property is good.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: August 22, 1995
    Assignee: TDK Corporation
    Inventors: Masahide Kohno, Kazuhiro Kuroda, Yasushi Ishikawa, Hideki Sasaki, Yasufumi Takasugi, Tsunehiko Ikarashi, Osamu Inoue
  • Patent number: 5294495
    Abstract: A magnetic layer of a magnetic recording medium comprising a magnetic powder dispersed in a binder resin contains a powder of Ti-containing Al.sub.2 O.sub.3. The magnetic recording medium may alterenatively incorporate the Ti-containing Al.sub.2 O.sub.3 powder in the back coating or in both the magnetic layer and the back coating. A superior running stability and a superior durability are attained.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: March 15, 1994
    Assignee: TDK Corporation
    Inventors: Kazuhiro Kuroda, Yasushi Ishikawa, Kazushi Tanaka
  • Patent number: 5089344
    Abstract: A magnetic recording medium whose magnetic layer formed on a base comprises a magnetic powder and a binder which contains a tertiary amine and uses 1,4-cyclohexanedimethanol as a chain extender. The magnetic powder is preferably of CrO.sub.2. The medium is made by mixing and dispersing the magnetic powder in a binder which consists of a reaction product of (A) a polyester which is a reaction product of a diol selected from among ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,5-pentadiol, and 1,6-hexanediol, and adipic acid, (B) a chain extender consisting of 1,4-cyclohexanedimethanol, (C) an aliphatic or aromatic diisocyanate in an amount substantially equal to the combined molar amount of the polyester and the chain extender, and (D) a tertiary amine, and applying the resulting magnetic coating material to a base.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: February 18, 1992
    Assignee: TDK Corporation
    Inventors: Kazunori Tamazaki, Hitoshi Azegami, Kazuhiro Kuroda
  • Patent number: 4837083
    Abstract: A magnetic recording medium comprising a plastic base and a magnetic layer formed thereon by applying a dispersion of a ferromagnetic powder in a resin binder, the magnetic layer containing the ferromagnetic powder which has a BET specific surface area of at least 35 m.sup.2 /g and .alpha.-Al2O3 particles having a particle size not exceeding one half the mean particle diameter of the ferromagnetic powder and less than 0.1 .mu.m in diameter, the .alpha.-Al2O3 particles being added in an amount greater than 5% but less than 15% by weight on the basis of the weight of the ferromagnetic powder. The magnetic powder is a metallic magnetic powder containing iron as the major constituent. The .alpha.-Al2O3 particles are cube-shaped.
    Type: Grant
    Filed: September 10, 1987
    Date of Patent: June 6, 1989
    Assignee: TDK Corporation
    Inventors: Kazuhiro Kuroda, Kazushi Tanaka, Hitoshi Azegami
  • Patent number: 4743501
    Abstract: In a magnetic recording medium wherein a magnetic coating composition comprising a binder and a magnetic powder is applied to the surface of a substrate, the dispersion of magnetic powder in binder is improved for enhanced physical and electromagnetic properties by using a vinyl chloride/hydroxyl group-containing vinyl monomer/polar group-containing monomer copolymer or a vinyl chloride/vinyl acetate/hydroxyl group-containing vinyl monomer/polar group-containing monomer copolymer having not been subjected to saponification, the polar group-containing monomer preferably containing an epoxy group as an additional polar group. Electromagnetic properties are further improved with a metal magnetic powder having a BET value of up to 60 m.sup.2 /g and a pH value of at least 7.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: May 10, 1988
    Assignee: TDK Corporation
    Inventors: Kenichiro Eguchi, Kazuhiro Kuroda, Ryoichi Awano
  • Patent number: 4689263
    Abstract: A magnetic recording medium comprising a substrate and magnetic recording double-layers formed on the substrate, wherein the magnetic material of the magnetic recording under-layer is composed essentially of an alloy or metal magnetic powder having a specific surface area of at most 30 m.sup.2 /g as measured by BET method, and the magnetic material of the magnetic recording top-layer is composed essentially of an iron oxide or Co-adsorbed iron oxide powder having a specific surface area of at least 25 m.sup.2 /g as measured by BET method.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: August 25, 1987
    Assignee: TDK Corporation
    Inventors: Hirokazu Kambe, Kazuhiro Kuroda, Masashi Hayama