Patents Assigned to NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
  • Publication number: 20210206998
    Abstract: An object of the present invention is to provide a novel liquid repellent. A liquid repellent including a poly(hydrocarbylamine) derivative, which is poly(hydrocarbylamine) substituted by one or more substituents, wherein at least one of the substituents is a substituent on an amine nitrogen in the poly(hydrocarbylamine), and is represented by the formula: —Ray in which Ray is a hydroxyethyl group optionally having one or more substituents (at least one of the substituents is an alkyl group optionally having one or more substituents).
    Type: Application
    Filed: April 12, 2019
    Publication date: July 8, 2021
    Applicants: DAIKIN INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Tsutomu KOBAYASHI, Atsushi SHIRAI, Yosuke KISHIKAWA, Seiji UJIIE, Shiori TOMITAKA
  • Publication number: 20200224365
    Abstract: The present invention provides: a cellulose nanofiber enabling the provision of a high-performance sheet-like material; a method for producing the cellulose nanofiber; and a sheet-like material obtained from the cellulose nanofiber. A bamboo-derived cellulose nanofiber having a cellulose purity of at least 90%, a fiber diameter of 10-20 nm, and a crystallinity of at least 70% can be obtained by a method comprising: (1) a step for subjecting a bamboo material to an alkali treatment and a mechanical treatment to prepare bamboo fibers; (2) a step for delignificating the obtained bamboo fibers; (3) a step for mechanically spreading the delignificated bamboo fibers; (4) a step for removing hemicellulose from the spread bamboo fibers; and (5) a step for removing metal components from the bamboo fibers from which hemicellulose has been removed.
    Type: Application
    Filed: March 12, 2018
    Publication date: July 16, 2020
    Applicant: NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventor: Taro KINUMOTO
  • Patent number: 10508709
    Abstract: In a vibration damping device 20, the moment of inertia J1 of a driven member 15, the moment of inertia J2 of an inertial mass body 23, the mass m of crank members 22, the distance L3 between the center of gravity G of the crank member 22 and the fulcrum of swinging of the crank member 22 with respect to the inertial mass body 23, and the distance L4 between this fulcrum and the center of rotation RC are determined so that torque fluctuation of an object for which vibration is to be damped, which is derived based on angular displacement and angles obtained by solving an equation of motion for the driven member 15 and an equation of motion for the entire vibration damping device 20 is equal to a target value.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 17, 2019
    Assignees: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, Kagoshima University
    Inventors: Yoichi Oi, Masaki Wajima, Hiroki Nagai, Takao Sakamoto, Takahiro Ryu, Takashi Nakae, Kenichiro Matsuzaki
  • Publication number: 20190226552
    Abstract: In a vibration damping device 20, the moment of inertia J1 of a driven member 15, the moment of inertia J2 of an inertial mass body 23, the mass m of crank members 22, the distance L3 between the center of gravity G of the crank member 22 and the fulcrum of swinging of the crank member 22 with respect to the inertial mass body 23, and the distance L4 between this fulcrum and the center of rotation RC are determined so that torque fluctuation of an object for which vibration is to be damped, which is derived based on angular displacement and angles obtained by solving an equation of motion for the driven member 15 and an equation of motion for the entire vibration damping device 20 is equal to a target value.
    Type: Application
    Filed: September 29, 2017
    Publication date: July 25, 2019
    Applicants: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, Kagoshima University
    Inventors: Yoichi OI, Masaki WAJIMA, Hiroki NAGAI, Takao SAKAMOTO, Takahiro RYU, Takashi NAKAE, Kenichiro MATSUZAKI
  • Patent number: 10284075
    Abstract: An overvoltage protection circuit is provided which is connected between a rectifier circuit and a load including an input capacitor element connected to both ends of the load. The overvoltage protection circuit includes a semiconductor switch connected between the rectifier circuit and the load, and a control circuit controls the semiconductor switch. When the rectified voltage exceeds a predetermined value, the control circuit turns off the semiconductor switch, and detects a voltage potential difference between both ends of the semiconductor switch, and then, for an interval when the voltage potential difference is zero or a predetermined minute value, the control circuit generates a control voltage for turning on the semiconductor switch, and outputs the control voltage to a control terminal of the semiconductor switch. The overvoltage protection circuit includes a current change circuit that gradually changes a current flowing through the semiconductor switch.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: May 7, 2019
    Assignees: RICOH ELECTRONIC DEVICES CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Shohtaroh Sohma, Yuji Takeyama, Kimihiro Nishijima
  • Publication number: 20190058323
    Abstract: An overvoltage protection circuit is provided which is connected between a rectifier circuit and a load including an input capacitor element connected to both ends of the load. The overvoltage protection circuit includes a semiconductor switch connected between the rectifier circuit and the load, and a control circuit controls the semiconductor switch. When the rectified voltage exceeds a predetermined value, the control circuit turns off the semiconductor switch, and detects a voltage potential difference between both ends of the semiconductor switch, and then, for an interval when the voltage potential difference is zero or a predetermined minute value, the control circuit generates a control voltage for turning on the semiconductor switch, and outputs the control voltage to a control terminal of the semiconductor switch. The overvoltage protection circuit includes a current change circuit that gradually changes a current flowing through the semiconductor switch.
    Type: Application
    Filed: August 1, 2018
    Publication date: February 21, 2019
    Applicants: RICOH ELECTRONIC DEVICES CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Shohtaroh SOHMA, Yuji TAKEYAMA, Kimihiro NISHIJIMA
  • Patent number: 10192669
    Abstract: A vector-magnetic-property-controlling material according to the present embodiment is subjected to a scratching process in two directions that intersect on the surface of a steel material. An iron core according to the present embodiment is configured from an oriented magnetic steel material which has been subjected to a scratching process in two directions that intersect on the surface thereof.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 29, 2019
    Assignees: TOSHIBA INDUSTRIAL PRODUCTS & SYSTEMS CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Masato Enokizono, Hiromu Shiota, Eiji Shimomura, Tsuyoshi Masuda
  • Publication number: 20180187744
    Abstract: A vibration damping device 20 includes: a crank member 22 that is coupled to a driven member 15 via a first coupling shaft A1 and that is swingable about the first coupling shaft A1 along with rotation of the driven member 15; and an inertial mass body 24 that is coupled to the driven member 15 via the crank member 22 and a connecting rod 23 and that is swung about a center of rotation RC in conjunction with the crank member 22 along with rotation of the driven member 15. A component force of a centrifugal force that acts on the crank member 22 along with rotation of the driven member 15 in a direction that is orthogonal to the direction from the center of the first coupling shaft A1 toward the center of gravity G always acts on the crank member 22 as a restoring force that acts to return the inertial mass body 24 to the center of the swing range. The component force is maximum when the inertial mass body 24 is positioned at the center of the swing range.
    Type: Application
    Filed: July 15, 2016
    Publication date: July 5, 2018
    Applicants: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, KAGOSHIMA UNIVERSITY
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Takahiro RYU, Takashi NAKAE, Kenichiro MATSUZAKI
  • Patent number: 9960678
    Abstract: In a power converter, a first electrical path connects between the series resonant circuit and a selected terminal from the high- and low-side input and output terminals of the power converter. An auxiliary diode is provided on one of the series resonant circuit and the first electrical path. An auxiliary switch, when turned on, causes an inductor current to flow through the auxiliary diode to the resonance inductor, thus storing electromagnetic energy into the resonance inductor, and causes the resonance inductor and the capacitance component of the series resonant circuit to resonate with each other. A second electrical path bypasses the auxiliary switch for flow of the inductor current. A discharge unit is provided on the second electrical path. The discharge unit is activated to discharge the electromagnetic energy stored in the resonance inductor via the second electrical path.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: May 1, 2018
    Assignees: DENSO CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Eisuke Takahashi, Masaya Takahashi, Kimihiro Nishijima
  • Publication number: 20170373592
    Abstract: In a power converter, a first electrical path connects between the series resonant circuit and a selected terminal from the high- and low-side input and output terminals of the power converter. An auxiliary diode is provided on one of the series resonant circuit and the first electrical path. An auxiliary switch, when turned on, causes an inductor current to flow through the auxiliary diode to the resonance inductor, thus storing electromagnetic energy into the resonance inductor, and causes the resonance inductor and the capacitance component of the series resonant circuit to resonate with each other. A second electrical path bypasses the auxiliary switch for flow of the inductor current. A discharge unit is provided on the second electrical path. The discharge unit is activated to discharge the electromagnetic energy stored in the resonance inductor via the second electrical path.
    Type: Application
    Filed: June 21, 2017
    Publication date: December 28, 2017
    Applicants: DENSO CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Eisuke TAKAHASHI, Masaya TAKAHASHI, Kimihiro NISHIJIMA
  • Patent number: 9304108
    Abstract: A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: April 5, 2016
    Assignees: NETUREN CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Yuji Gotoh, Noriyoshi Takaoka, Kazuhiro Kawasaki, Yoshitaka Misaka
  • Patent number: 9139489
    Abstract: Provided are a method of manufacturing an olefin having 2 to 4 carbon atoms including: reacting a catalyst with synthesis gas through a Fischer-Tropsch reaction, thereby obtaining the olefin having 2 to 4 carbon atoms, in which the catalyst is a catalyst obtained by reducing the iron ion and the cobalt ion in a dispersion liquid or a solution containing the iron ion, the cobalt ion and a dispersant that interacts with the iron ion and the cobalt ion, and a method of manufacturing propylene, which uses the above manufacturing method.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: September 22, 2015
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, Kyushu University, NATIONAL UNIVERSITY CORPORATION, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, NATIONAL UNIVERSITY CORPORATION UNIVERSITY OF TOYAMA
    Inventors: Miho Yamauchi, Katsutoshi Nagaoka, Katsutoshi Sato, Noritatsu Tsubaki, Akihiro Yuasa, Hideyuki Higashimura, Takeshi Ishiyama
  • Publication number: 20150246342
    Abstract: There is provided a catalyst for hydrocarbon reforming having a high deposition suppressing effect with respect to a carbonaceous material on the catalyst surface even in a case where a reforming material including carbon dioxide, in particular, formed of only carbon dioxide is used in a reforming reaction, a method of manufacturing the same, and a method of manufacturing a synthesis gas using the catalyst.
    Type: Application
    Filed: February 26, 2015
    Publication date: September 3, 2015
    Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, SHOEI CHEMICAL INC.
    Inventors: Kazuro NAGASHIMA, Katsutoshi NAGAOKA, Katsutoshi SATO, Hideyuki HIGASHIMURA
  • Patent number: 9073043
    Abstract: The drive of direct-heat-supply type reforming of hydrocarbon at ordinary temperature is necessary in order to realize a self-sustaining, on-site reforming type fuel cell system which does not necessitate the supply of energy from the outside. According to the invention, an oxide, CeO2 or Pr6O11, or a Ce/Zr or Ce/Zr/Y double oxide is used as the oxide containing a rare earth element capable of changing the oxidation number with an active metal and oxygen defects are introduced into the oxide or double oxide by activating the oxide or double oxide with a reducing gas at high temperature. When a reaction gas containing hydrocarbon and oxygen is passed though the catalyst at low temperature, the oxygen defects react with oxygen and thereby return to the original oxide.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: July 7, 2015
    Assignee: National University Corporation Oita University
    Inventors: Katutoshi Nagaoka, Yuusaku Takita, Katutoshi Satou, Hiroyasu Nishiguti
  • Publication number: 20140045955
    Abstract: Provided are a method of manufacturing an olefin having 2 to 4 carbon atoms including: reacting a catalyst with synthesis gas through a Fischer-Tropsch reaction, thereby obtaining the olefin having 2 to 4 carbon atoms, in which the catalyst is a catalyst obtained by reducing the iron ion and the cobalt ion in a dispersion liquid or a solution containing the iron ion, the cobalt ion and a dispersant that interacts with the iron ion and the cobalt ion, and a method of manufacturing propylene, which uses the above manufacturing method.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicants: SUMITOMO CHEMICAL COMPANY , LIMITED, National University Corporation University of Toya ma, NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Miho YAMAUCHI, Katsutoshi NAGAOKA, Katsutoshi SATO, Noritatsu TSUBAKI, Akihiro YUASA, Hideyuki HIGASHIMURA, Takeshi ISHIYAMA
  • Publication number: 20100303712
    Abstract: The drive of direct-heat-supply type reforming of hydrocarbon at ordinary temperature is necessary in order to realize a self-sustaining, on-site reforming type fuel cell system which does not necessitate the supply of energy from the outside. According to the invention, an oxide, CeO2 or Pr6O11, or a Ce/Zr or Ce/Zr/Y double oxide is used as the oxide containing a rare earth element capable of changing the oxidation number with an active metal and oxygen defects are introduced into the oxide or double oxide by activating the oxide or double oxide with a reducing gas at high temperature. When a reaction gas containing hydrocarbon and oxygen is passed though the catalyst at low temperature, the oxygen defects react with oxygen and thereby return to the original oxide.
    Type: Application
    Filed: November 19, 2007
    Publication date: December 2, 2010
    Applicant: NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Katutoshi Nagaoka, Yuusaku Takita, Katutoshi Satou, Hiroyasu Nishiguti