Patents by Inventor Koji Fujimura

Koji Fujimura 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: 10934170
    Abstract: A carbon nanotube composite includes a carbon nanotube bundle including a plurality of carbon nanotubes that are bundled, each of the plurality of carbon nanotubes having a single-walled or multi-walled structure, and a group of elements of other type introduced in an aligned manner into a gap portion between the plurality of carbon nanotubes. In the carbon nanotube bundle, a ratio of the number of carbon nanotubes having a double-walled or triple-walled structure to the number of the plurality of carbon nanotubes is greater than or equal to 50%, and other-type element bonded bodies constituting the group of elements of other type are arranged in line along a longitudinal direction of the carbon nanotubes.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: March 2, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yoshinori Kazama, Satoshi Yamashita, Masashige Watanabe, Hirokazu Sasaki, Koji Fujimura, Yuudai Tanimura
  • Publication number: 20200343006
    Abstract: The fuel element of the present invention includes a cladding tube and a metal fuel contained in the cladding tube, in which a gas plenum region is formed above the metal fuel and inside the cladding tube and has a small-diameter portion in the gas plenum region. Further, the fuel assembly of the present invention includes the fuel element of the present invention and a wrapper tube surrounding the fuel element, in which a coolant material passage is formed between the fuel element and the fuel element. Further, the core of the present invention includes an inner core fuel region loaded with the fuel assembly according to the present invention, and an outer core fuel region loaded with the fuel assembly of the present invention.
    Type: Application
    Filed: April 16, 2020
    Publication date: October 29, 2020
    Inventors: Koji FUJIMURA, Junichi MIWA
  • Publication number: 20190392957
    Abstract: There is provided a core of a fast reactor including: a core fuel region in which core fuel assemblies loading a metal fuel are arranged on a central region in a radial direction of the core; an inner blanket fuel region in which blanket fuel assemblies loading another metal fuel are circumferentially arranged on an inner portion of the core fuel region; and an outer peripheral blanket fuel region in which the blanket fuel assemblies are circumferentially arranged on an outer periphery of the core fuel region, wherein the metal fuel is formed of a U—Pu—Zr alloy or an alloy of U, Pu, TRU other than Pu, and Zr, the other metal fuel is formed of an alloy of U and Zr, and the Zr content of the other metal fuel is lower than the Zr content of the metal fuel.
    Type: Application
    Filed: June 20, 2019
    Publication date: December 26, 2019
    Inventors: Koji FUJIMURA, Junichi MIWA
  • Publication number: 20190355490
    Abstract: There is provided a CNTs wire capable of materializing a low resistivity and improving the electroconductivity. The CNT wire is formed from a single CNT aggregate constituted of a plurality of CNTs . . . having a single- or multi-walled structure, or formed by bundling a plurality of the CNT aggregates. The proportion of the total number of the CNTs having a double-walled or triple-walled structure based on the number of the plurality of CNTs constituting the CNT wire is 75% or higher; the proportion of the total number of the CNTs having an average diameter of the innermost wall of 1.7 nm or smaller based on the number of the CNTs constituting the CNT wire is 75% or higher; and the full-width at half maximum ?? in azimuth angle in azimuth intensity distribution by SAXS indicating orientation of the plurality of CNT aggregates is 60° or smaller.
    Type: Application
    Filed: July 31, 2019
    Publication date: November 21, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Satoshi YAMAZAKI, Yoshinori KAZAMA, Satoshi YAMASHITA, Koji FUJIMURA, Yuudai TANIMURA, Yukako NAKAI, Kazutomi MIYOSHI, Hideki AIZAWA, Kenji HATAMOTO
  • Patent number: 10392253
    Abstract: A low-resistivity carbon nanotube aggregate includes a plurality of carbon nanotubes each having one or more walls, wherein a ratio of a total number of carbon nanotubes that have two or three walls relative to a total number of said plurality of carbon nanotubes is 75% or greater, and wherein, in a G band of a Raman spectrum in the Raman spectroscopy of the plurality of carbon nanotubes, a G+/Gtotal ratio that is indicative of an amount of semiconductor carbon nanotubes relative to metallic carbon nanotubes is 0.70 or greater.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: August 27, 2019
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Masashige Watanabe, Hideki Aizawa, Kazutomi Miyoshi, Satoshi Yamashita, Yoshinori Kazama, Yuudai Tanimura, Koji Fujimura, Morinobu Endo, Kenji Takeuchi, Masatsugu Fujishige
  • Publication number: 20190031512
    Abstract: A carbon nanotube composite includes a carbon nanotube bundle including a plurality of carbon nanotubes that are bundled, each of the plurality of carbon nanotubes having a single-walled or multi-walled structure, and a group of elements of other type introduced in an aligned manner into a gap portion between the plurality of carbon nanotubes. In the carbon nanotube bundle, a ratio of the number of carbon nanotubes having a double-walled or triple-walled structure to the number of the plurality of carbon nanotubes is greater than or equal to 50%, and other-type element bonded bodies constituting the group of elements of other type are arranged in line along a longitudinal direction of the carbon nanotubes.
    Type: Application
    Filed: September 21, 2018
    Publication date: January 31, 2019
    Applicant: Furukawa Electric Co., Ltd.
    Inventors: Yoshinori KAZAMA, Satoshi YAMASHITA, Masashige WATANABE, Hirokazu SASAKI, Koji FUJIMURA, Yuudai TANIMURA
  • Publication number: 20180170757
    Abstract: A low-resistivity carbon nanotube aggregate includes a plurality of carbon nanotubes each having one or more walls, wherein a ratio of a total number of carbon nanotubes that have two or three walls relative to a total number of said plurality of carbon nanotubes is 75% or greater, and wherein, in a G band of a Raman spectrum in the Raman spectroscopy of the plurality of carbon nanotubes, a G+/Gtotal ratio that is indicative of an amount of semiconductor carbon nanotubes relative to metallic carbon nanotubes is 0.70 or greater.
    Type: Application
    Filed: February 13, 2018
    Publication date: June 21, 2018
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masashige WATANABE, Hideki AIZAWA, Kazutomi MIYOSHI, Satoshi YAMASHITA, Yoshinori KAZAMA, Yuudai TANIMURA, Koji FUJIMURA, Morinobu ENDO, Kenji TAKEUCHI, Masatsugu FUJISHIGE
  • Patent number: 9091739
    Abstract: A method for detecting SOC and SOH of a storage battery includes: calculating an SOC value of the storage battery with use of an SOC calculation unit based on a measured voltage value or a measured current value of the storage battery and calculating an SOH value of the storage battery with use of an SOH calculation unit based on the SOC value; further calculating a new SOC value with use of the SOC calculation unit based on the SOH value and calculating a new SOH value with use of the SOH calculation unit based on the new SOC value, these further calculations of SOC value and SOH value being repeated a prescribed n times of at least one so as to obtain an nth calculated SOC value and an nth calculated SOH value; outputting the nth calculated SOH value as an SOH output value and outputting the nth calculated SOH value as an SOC output value; and storing the SOH output value into a memory.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 28, 2015
    Assignee: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Noriyasu Iwane, Koji Fujimura
  • Publication number: 20120294407
    Abstract: A nuclear power plant and a fuel pool water cooling facility and method are provided that can suppress the decrease of a water level in a fuel pool with no power supply at the time of malfunction of a circulating water system. The nuclear power plant includes a reactor pressure vessel 2 that encompasses a reactor 1 containing nuclear fuel; a containment vessel 3 for housing the reactor pressure vessel 2; a fuel pool 11 for storing spent fuel 12; a reactor building 10 that houses the reactor pressure vessel 2, the containment vessel 3 and the fuel pool 11; a circulating water system 21 adapted to forced-circulating-cool the fuel pool water 14 in the fuel pool 11; and at least one heat pipe 13 for transferring heat of the fuel pool water 14 in the fuel pool 11 and discharging the heat to the atmosphere.
    Type: Application
    Filed: April 25, 2012
    Publication date: November 22, 2012
    Applicant: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Koji Namba, Masaya Ohtsuka, Koji Fujimura
  • Publication number: 20120265462
    Abstract: A method for detecting SOC and SOH of a storage battery includes: calculating an SOC value of the storage battery with use of an SOC calculation unit based on a measured voltage value or a measured current value of the storage battery and calculating an SOH value of the storage battery with use of an SOH calculation unit based on the SOC value; further calculating a new SOC value with use of the SOC calculation unit based on the SOH value and calculating a new SOH value with use of the SOH calculation unit based on the new SOC value, these further calculations of SOC value and SOH value being repeated a prescribed n times of at least one so as to obtain an nth calculated SOC value and an nth calculated SOH value; outputting the nth calculated SOH value as an SOH output value and outputting the nth calculated SOH value as an SOC output value; and storing the SOH output value into a memory.
    Type: Application
    Filed: January 27, 2012
    Publication date: October 18, 2012
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Noriyasu IWANE, Koji FUJIMURA
  • Publication number: 20120140866
    Abstract: A fast breeder reactor type nuclear power plant system including a reactor vessel provided with a core and a pipe of primary loop coolant for supplying primary loop coolant to the reactor vessel. One or more bending parts are formed on at least the pipe of primary loop coolant of the pipes, and a part of the bending part on a downstream side is provided with a flow path having a non-circular sectional configuration wherein the negative side of the bending part is formed in either a planar or flat shape.
    Type: Application
    Filed: February 13, 2012
    Publication date: June 7, 2012
    Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.
    Inventors: Koji Namba, Koji Fujimura, Satoshi Itooka, Kazuhiro Fujimata
  • Publication number: 20110286569
    Abstract: A fast breeder reactor type nuclear power plant system including a reactor vessel provided with a core and a pipe of primary loop coolant for supplying primary loop coolant to the reactor vessel. One or more bending parts are formed on at least the pipe of primary loop coolant of the pipes, and a part of the bending part on a downstream side is provided with a flow path having a non-circular sectional configuration wherein the negative side of the bending part is formed in either a planar or flat shape.
    Type: Application
    Filed: July 5, 2011
    Publication date: November 24, 2011
    Applicant: HITACHI-GE NUCLEAR ENERGY, LTD.
    Inventors: Koji Namba, Koji Fujimura, Satoshi Itooka, Kazuhiro Fujimata
  • Patent number: 7764049
    Abstract: A method for determining battery discharge capability includes estimating the optimum state vector X by an extended Kalman filter operation. Using the estimated state vector X, element parameters of an equivalent circuit are renewed. Furthermore, based on the equivalent circuit using the renewed element parameters, at the time of discharging with a predetermined current pattern from a battery, a voltage drop ?V is estimated. Therefore, the discharge capacity of the battery is determined.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: July 27, 2010
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Noriyasu Iwane, Koji Fujimura, Takezo Sugimura
  • Patent number: 7567378
    Abstract: A Raman amplifying device includes a plurality of Raman amplifiers having a gain wavelength characteristic with a gain peak at which an amplification gain becomes the largest, including a first Raman amplifier having a gain wavelength characteristic with a plurality of gain peaks including a first gain peak and a second gain peak adjacent to the first gain peak; a second Raman amplifier having a gain wavelength characteristic with at least one gain peak including a third gain peak between the first gain peak and the second gain peak; and a third Raman amplifier having a gain wavelength characteristic with a fourth gain peak between the first gain peak and the third gain peak, the fourth gain peak forming an arithmetic sequence between the first gain peak and the third gain peak.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: July 28, 2009
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Koji Fujimura, Masami Ikeda, Misao Sakano
  • Patent number: 7535629
    Abstract: An apparatus, method and computer program product for controlling pumping light powers for a multiple-wavelength-pumped Raman amplifier that is pumped by pumping lights from a plurality of pumping light sources, by measuring gain wavelength characteristic or signal-power wavelength characteristic of the multiple-wavelength-pumped Raman amplifier using a plurality of photodetectors having different wavelength-sensitivity characteristics. The apparatus includes a determining unit that estimates a power of each of signal channels in a wavelength band for use based on values monitored by the photodetectors, and determines the pumping light powers using the power of each of the signal channels estimated. The determining unit estimates the power of each of the signal channels by performing an interpolation of the values monitored by the photodetectors.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: May 19, 2009
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Koji Fujimura, Misao Sakano, Takeshi Nakajima, Shu Namiki
  • Publication number: 20090122944
    Abstract: A fast breeder reactor type nuclear power plant system including a reactor vessel provided with a core and a pipe of primary loop coolant for supplying primary loop coolant to the reactor vessel. One or more bending parts are formed on at least the pipe of primary loop coolant of the pipes, and a part of the bending part on a downstream side is provided with a flow path having a non-circular sectional configuration wherein the negative side of the bending part is formed in either a planar or flat shape.
    Type: Application
    Filed: August 13, 2008
    Publication date: May 14, 2009
    Inventors: Koji Namba, Koji Fujimura, Satoshi Itooka, Kazuhiro Fujimata
  • Publication number: 20090027007
    Abstract: Regarding a method for determining battery discharge capability of the present invention, the optimum state vector X is estimated by extended Kalman filter operation. Using the estimated state vector X, element parameters of an equivalent circuit are renewed to the optimum (step S7). Furthermore, based on the equivalent circuit 21 using the renewed element parameters, at the time of discharging with a predetermined current pattern from a battery 12, a voltage drop ?V is estimated (step S8). Therefore the discharge capacity of the battery 12 is determined (step S9).
    Type: Application
    Filed: July 8, 2008
    Publication date: January 29, 2009
    Applicant: THE FURUKAWA ELECTRIC CO, LTD.
    Inventors: Noriyasu IWANE, Koji FUJIMURA, Takezo SUGIMURA
  • Patent number: 7438047
    Abstract: The present invention concerns a multi-cylinder engine comprising a throttle body (5) in which a throttle intake-air passage (6) is provided. A throttle valve (7) is arranged in this throttle intake-air passage (6). Attached to the throttle body (5) is an injector (8), a leading end portion (9) of which is arranged opposite to an interior area of the throttle intake-air passage (6) downstream of the throttle valve (7) and is opened to provided a liquid-fuel injection hole (10). An intake-air pressure sensor (15) is attached to the throttle body (5) together with the injector (8) and an intake-air pressure introduction passage (18) has an inlet (18a) provided by opening an inner peripheral surface of the throttle intake-air passage (6) upstream of the injector (8).
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: October 21, 2008
    Assignee: Kubota Corporation
    Inventors: Takeshi Kawasaki, Yutaka Teruumi, Koji Fujimura, Hiroshi Inoue, Tetsushi Karasawa, Seiji Izuhara
  • Publication number: 20080221775
    Abstract: The present invention concerns a multi-cylinder engine comprising a throttle body (5) in which a throttle intake-air passage (6) is provided. A throttle valve (7) is arranged in this throttle intake-air passage (6). Attached to the throttle body (5) is an injector (8), a leading end portion (9) of which is arranged opposite to an interior area of the throttle intake-air passage (6) downstream of the throttle valve (7) and is opened to provided a liquid-fuel injection hole (10). An intake-air pressure sensor (15) is attached to the throttle body (5) together with the injector (8) and an intake-air pressure introduction passage (18) has an inlet (18a) provided by opening an inner peripheral surface of the throttle intake-air passage (6) upstream of the injector (8).
    Type: Application
    Filed: September 13, 2007
    Publication date: September 11, 2008
    Applicant: KUBOTA CORPORATION
    Inventors: Takeshi KAWASAKI, Yutaka TERUUMI, Koji FUJIMURA, Hiroshi INOUE, Tetsushi KARASAWA, Seiji IZUHARA
  • Publication number: 20080204031
    Abstract: A method for detecting SOC and SOH of a storage battery includes: calculating an SOC value of the storage battery with use of an SOC calculation unit based on a measured voltage value or a measured current value of the storage battery and calculating an SOH value of the storage battery with use of an SOH calculation unit based on the SOC value; further calculating a new SOC value with use of the SOC calculation unit based on the SOH value and calculating a new SOH value with use of the SOH calculation unit based on the new SOC value, these further calculations of SOC value and SOH value being repeated a prescribed n times of at least one so as to obtain an nth calculated SOC value and an nth calculated SOH value; outputting the nth calculated SOH value as an SOH output value and outputting the nth calculated SOH value as an SOC output value; and storing the SOH output value into a memory.
    Type: Application
    Filed: March 17, 2008
    Publication date: August 28, 2008
    Applicant: The Furukawa Electric Co., Ltd.
    Inventors: Noriyasu IWANE, Atsushi KIMURA, Koji FUJIMURA, Yuichi Watanabe, Toshiyuki SATO, Fumikazu IWAHANA, Takashi IlJIMA