Patents by Inventor Takaaki Iguchi

Takaaki Iguchi 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: 10738366
    Abstract: The present invention provides electric-resistance welded steel pipe optimal for applications such as production of shale gas which is comprised of steel having a chemical composition which contains, by mass %, respectively, C: 0.08 to 0.18%, Si: 0.01% to 0.50%, Mn: 1.30 to 2.1%, Al: 0.001 to 0.10%, Nb: 0.005 to 0.08%, and Ti: 0.005 to 0.03%, is limited to N 0.008% or less, P: 0.020% or less, and S: 0.010% or less, and has a balance of Fe and unavoidable impurities, wherein a structure at a center part of thickness is 40% to 70% by area of ferrite phase having a circle-equivalent diameter of 1.0 ?m to 10.0 ?m and a balance of a low temperature transformation phase comprising a bainite phase, and Ceq satisfies 0.32?Ceq?0.60.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: August 11, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hideki Hamatani, Keinosuke Iguchi, Masakazu Ozaki, Takaaki Fukushi, Takuya Asano
  • Publication number: 20200168958
    Abstract: A charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, is configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode. The deposition potential is variable in accordance with a state of charge of the energy storage device, and/or charge time of the energy storage device, and/or current inputted to the energy storage device, and/or temperature of the energy storage device.
    Type: Application
    Filed: January 31, 2020
    Publication date: May 28, 2020
    Inventors: Hiroki MATSUI, Yuta KASHIWA, Seijiro OCHIAI, Takaaki IGUCHI
  • Patent number: 10594002
    Abstract: An embodiment provides a charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, the charge voltage controller configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 17, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Hiroki Matsui, Yuta Kashiwa, Seijiro Ochiai, Takaaki Iguchi
  • Patent number: 10527681
    Abstract: It is an object of an embodiment to provide a degradation estimator for an energy storage device, configured to estimate degradation of the energy storage device, an energy storage apparatus, an input-output control device for the energy storage device, and a method for controlling input and output of the energy storage device. The embodiment includes estimating a temporary power decrease rate of the energy storage device in accordance with at least one of an average load, a maximum load, and a ?SOC obtained from detected current of the energy storage device and detected temperature of the energy storage device.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: January 7, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazuki Furukawa, Hiroki Matsui, Seijiro Ochiai, Takaaki Iguchi
  • Publication number: 20190372296
    Abstract: A laser device includes a first laser medium and a second laser medium that have a first surface and a second surface opposite to the first surface, and receive input of excitation light and seed light from the first surface side to amplify the seed light, a holder that holds the first laser medium and the second laser medium; and a pair of cooling units that cool the first laser medium and the second laser medium according to change in volume of a refrigerant.
    Type: Application
    Filed: May 29, 2019
    Publication date: December 5, 2019
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Koichi IYAMA, Yasuki TAKEUCHI, Yuma HATANO, Takaaki MORITA, Takuto IGUCHI, Yoshinori KATO, Takashi SEKINE
  • Patent number: 10441982
    Abstract: A plug for rolling of a seamless steel pipe, the plug having an oxide layer composed of a cobalt-base oxide on a surface of a coating layer formed by coating a surface of a base metal with cobalt or a cobalt-base alloy, a method for manufacturing the plug and a method for manufacturing a seamless steel pipe using the plug.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: October 15, 2019
    Assignee: JFE STEEL CORPORATION
    Inventors: Takaaki Iguchi, Tatsuro Katsumura, Hideto Kimura
  • Patent number: 10344860
    Abstract: There is provided a highly heat conductive piston ring for an internal combustion engine capable of exhibiting a gas seal function and a heat transfer function for a long period of time in a stable manner when used in an automobile gasoline engine having a high compression ratio. The highly heat conductive piston ring for an internal combustion engine is a piston ring for an internal combustion engine having an Mn—Cr steel as a base material, the Mn—Cr steel including C in the range of from 0.52 to 0.65 mass %, Si in the range of from 0.15 to 0.35 mass %, Mn in the range of from 0.60 to 1.00 mass %, Cr in the range of from 0.60 to 1.00 mass %, P in the range of 0.04 mass % or less, S in the range of 0.04 mass % or less, a slight amount of components (total content of Al, Ni, and Cu) in the range of from 0.05 to 3.0 mass %, and a remnant being Fe and unavoidable impurities.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: July 9, 2019
    Assignees: NIPPON PISTON RING CO., LTD., NISSAN MOTOR CO., LTD.
    Inventors: Tsugane Hirase, Hiromichi Yokokawa, Kazuhiro Fujimura, Junpei Ogawa, Takaaki Kondo, Tomonori Miyazawa, Toyoki Iguchi, Takuma Suzuki
  • Publication number: 20180113174
    Abstract: It is an object of an embodiment to provide a degradation estimator for an energy storage device, configured to estimate degradation of the energy storage device, an energy storage apparatus, an input-output control device for the energy storage device, and a method for controlling input and output of the energy storage device. The embodiment includes estimating a temporary power decrease rate of the energy storage device in accordance with at least one of an average load, a maximum load, and a ?SOC obtained from detected current of the energy storage device and detected temperature of the energy storage device.
    Type: Application
    Filed: March 30, 2016
    Publication date: April 26, 2018
    Inventors: Kazuki FURUKAWA, Hiroki MATSUI, Seijiro OCHIAI, Takaaki IGUCHI
  • Publication number: 20180053971
    Abstract: An embodiment provides a charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, the charge voltage controller configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode.
    Type: Application
    Filed: March 30, 2016
    Publication date: February 22, 2018
    Inventors: Hiroki MATSUI, Yuta KASHIWA, Seijiro OCHIAI, Takaaki IGUCHI
  • Patent number: 9865881
    Abstract: Provided is an electrode assembly including: a negative electrode including a negative electrode current collector (NC) and a negative electrode active material layer (NAL) disposed on at least one surface of the NC; a positive electrode including a positive electrode current collector (PC), a positive electrode active material layer (PAL) disposed on at least one surface of the PC, and an undercoat layer being disposed between the PC and the PAL and being higher in resistance value than the PC. The negative electrode and the positive electrode are stacked on each other. In at least one side of the thus stacked negative and positive electrodes, the NAL projects from an edge of the PAL in a direction in which the NC and PC extend, and the undercoat layer projects from an edge of the NAL in the direction.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: January 9, 2018
    Assignee: GS Yuasa International Ltd.
    Inventors: Takanobu Araki, Takaaki Iguchi
  • Patent number: 9601811
    Abstract: Provided is a nonaqueous electrolyte secondary cell including: a case; an element housed in the case, including at least a positive electrode member, a negative electrode member and a separator; and an electrolyte solution poured into the case, wherein when in the state of the case being installed, in the direction perpendicular to the liquid surface of the electrolyte solution, the length between the highest position and the lowest position of the element is represented by L1 and the length between the liquid surface and the lowest position of the element is represented by L2, the ratio calculated with the formula L2/L1×100 is 10% or more and 100% or less.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: March 21, 2017
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Suguru Kozono, Yasuyuki Abe, Kazushi Nitta, Takaaki Iguchi
  • Patent number: 9159501
    Abstract: An electric storage device includes an electrode assembly, in which a positive electrode and a negative electrode in the shape of a sheet are wound with a separator sandwiched therebetween. The electrode assembly has a flat shape and includes a first flat portion and a second flat portion, which are opposed to each other, and a first curved portion and a second curved portion which connect end portions of the first and second flat portions together. One of the positive electrode and the negative electrode covers an inner-circumferential end portion of the other electrode and is disposed on an innermost circumference of the electrode assembly. An inner-circumferential end portion of the one of the electrodes causes an elastic force to act outwardly on the other electrode.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: October 13, 2015
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazushi Nitta, Takaaki Iguchi
  • Publication number: 20150217349
    Abstract: A plug for rolling of a seamless steel pipe, the plug having an oxide layer composed of a cobalt-base oxide on a surface of a coating layer formed by coating a surface of a base metal with cobalt or a cobalt-base alloy, a method for manufacturing the plug and a method for manufacturing a seamless steel pipe using the plug.
    Type: Application
    Filed: September 9, 2013
    Publication date: August 6, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Takaaki Iguchi, Tatsuro Katsumura, Hideto Kimura
  • Publication number: 20150027191
    Abstract: A method of producing a steel product having an excellent internal quality including subjecting a steel raw material of a round section to rolling at 3 or more passes to form a steel product of round section, wherein the rolling is conducted with a pair of upper and lower flat rolls at first pass, a pair of upper and lower same or different caliber rolls at second or more passes until just before a last pass, and a pair of upper and lower round caliber rolls at the last pass, under a condition that an area reduction in the first pass is within a range of less than a total area reduction from the raw material to the product.
    Type: Application
    Filed: February 15, 2013
    Publication date: January 29, 2015
    Applicant: JFE Steel Corporation
    Inventors: Tatsuro Katsumura, Takaaki Iguchi, Rinya Kojo, Koji Hara
  • Publication number: 20140087269
    Abstract: Provided is a nonaqueous electrolyte secondary cell including: a case; an element housed in the case, including at least a positive electrode member, a negative electrode member and a separator; and an electrolyte solution poured into the case, wherein when in the state of the case being installed, in the direction perpendicular to the liquid surface of the electrolyte solution, the length between the highest position and the lowest position of the element is represented by L1 and the length between the liquid surface and the lowest position of the element is represented by L2, the ratio calculated with the formula L2/L1×100 is 10% or more and 100% or less.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 27, 2014
    Applicant: GS Yuasa International Ltd.
    Inventors: Suguru KOZONO, Yasuyuki ABE, Kazushi NITTA, Takaaki IGUCHI
  • Publication number: 20140072877
    Abstract: Provided is an electrode assembly including: a negative electrode including a negative electrode current collector (NC) and a negative electrode active material layer (NAL) disposed on at least one surface of the NC; a positive electrode including a positive electrode current collector (PC), a positive electrode active material layer (PAL) disposed on at least one surface of the PC, and an undercoat layer being disposed between the PC and the PAL and being higher in resistance value than the PC. The negative electrode and the positive electrode are stacked on each other. In at least one side of the thus stacked negative and positive electrodes, the NAL projects from an edge of the PAL in a direction in which the NC and PC extend, and the undercoat layer projects from an edge of the NAL in the direction.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 13, 2014
    Applicant: GS Yuasa International Ltd.
    Inventors: Takanobu Araki, Takaaki Iguchi
  • Publication number: 20140072849
    Abstract: An electric storage device includes an electrode assembly, in which a positive electrode and a negative electrode in the shape of a sheet are wound with a separator sandwiched therebetween. The electrode assembly has a flat shape and includes a first flat portion and a second flat portion, which are opposed to each other, and a first curved portion and a second curved portion which connect end portions of the first and second flat portions together. One of the positive electrode and the negative electrode covers an inner-circumferential end portion of the other electrode and is disposed on an innermost circumference of the electrode assembly. An inner-circumferential end portion of the one of the electrodes causes an elastic force to act outwardly on the other electrode.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 13, 2014
    Applicant: GS Yuasa International Ltd.
    Inventors: Kazushi Nitta, Takaaki Iguchi
  • Patent number: 8211336
    Abstract: Disclosed is a nonaqueous electrolyte secondary battery which is suppressed in increase of internal resistance, while having high capacity retention rate and small battery swelling even after a long use. Specifically disclosed is a method for manufacturing a nonaqueous electrolyte secondary battery, which is characterized by using a positive electrode containing a positive electrode active material having an ?-NaFeO2 crystal structure and the following chemical composition: LixMnaNibCocOd (wherein 0<x<1.3, a+b+c=1, 1.7?d?2.3), while satisfying |a?b|<0.03 and 0.33?c<1, a negative electrode, and a nonaqueous electrolyte containing an unsaturated sultone and a sulfate ester compound.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: July 3, 2012
    Assignee: GS Yuasa International Ltd.
    Inventors: Hanako Miyasaka, Takaaki Iguchi, Junichi Kuratomi, Sumio Mori
  • Patent number: 7985372
    Abstract: A ferritic stainless steel sheet for use in raw material pipes for forming bellows pipes has excellent formability. More specifically, the ferritic stainless steel sheet contains 10 % to 25 % by mass of Cr and has a yield stress in the range of 300 to 450 MPa and the product of the yield stress and the uniform elongation properties of at least 5200 (MPa·%). Preferably, the ferritic stainless steel sheet for use in raw material pipes for forming bellows pipes has an average crystal grain size D of 35 ?m or less or a surface roughness of 0.40 ?m or less as determined by Ra.
    Type: Grant
    Filed: May 29, 2006
    Date of Patent: July 26, 2011
    Assignee: JFE Steel Corporation
    Inventors: Yoshihiro Ozaki, Yasushi Kato, Takaaki Iguchi
  • Publication number: 20100018034
    Abstract: Disclosed is a nonaqueous electrolyte secondary battery which is suppressed in increase of internal resistance, while having high capacity retention rate and small battery swelling even after a long use. Specifically disclosed is a method for manufacturing a nonaqueous electrolyte secondary battery, which is characterized by using a positive electrode containing a positive electrode active material having an ?-NaFeO2 crystal structure and the following chemical composition: LixMnaNibCocOd (wherein 0<x<1.3, a+b+c=1, 1.7?d?2.3), while satisfying |a?b|<0.03 and 0.33?c<1, a negative electrode, and a nonaqueous electrolyte containing an unsaturated sultone and a sulfate ester compound.
    Type: Application
    Filed: September 7, 2007
    Publication date: January 28, 2010
    Applicant: GS YUASA CORPORATION
    Inventors: Hanako Miyasaka, Takaaki Iguchi, Junichi Kuratomi, Sumio Mori