Patents by Inventor Takafumi Fujii

Takafumi Fujii 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: 11224991
    Abstract: An extruder screw conveying raw materials while kneading them includes a screw main body, conveyance portions, barrier portions, and paths. The conveyance portions convey the raw materials in an axial direction. The paths each include an entrance and an exit. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in the same direction as a conveyance direction of the conveyance portions. The exit is opened in the outer circumferential surface of the screw main body at a position outside the conveyance portions in which the entrance is opened.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: January 18, 2022
    Assignees: Shibaura Machine Co., Ltd., HSP Technologies Inc.
    Inventors: Akiyoshi Kobayashi, Shigeyuki Fujii, Takafumi Sameshima, Hiroshi Shimizu
  • Patent number: 11220022
    Abstract: An extruder screw conveying raw materials while kneading them includes a screw main body, conveyance portions, barrier portions, and paths. The conveyance portions convey the raw materials in an axial direction. The paths each include an entrance and an exit. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in an opposite direction to a conveyance direction. The exit is opened in the outer circumferential surface of the screw main body at a position outside the conveyance portions in which the entrance is opened.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: January 11, 2022
    Assignees: Shibaura Machine Co., Ltd., HSP Technologies Inc.
    Inventors: Akiyoshi Kobayashi, Shigeyuki Fujii, Takafumi Sameshima, Hiroshi Shimizu
  • Publication number: 20210366665
    Abstract: An alkali metal ion capacitor that is capable of operating in a high-temperature environment at 85° C. The alkali metal ion capacitor is provided with: a positive electrode active material capable of adsorbing and desorbing alkali metal ions; a positive electrode binder for binding the positive electrode active material; a negative electrode active material capable of storing and releasing alkali metal ions; a negative electrode binder for binding the negative electrode active material; and an electrolytic solution that contains an organic solvent and an imide-based alkali metal salt. The negative electrode active material is predoped with alkali metal ions. The positive electrode binder has a Hansen solubility parameter-based RED value of more than 1 with respect to the electrolytic solution.
    Type: Application
    Filed: April 26, 2019
    Publication date: November 25, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yukihiro KOMATSUBARA, Takumi MIO, Kentaro IIZUKA, Takafumi FUJII, Koji NISHI, Naoki OHMI, Yusuke KIMOTO
  • Patent number: 11173570
    Abstract: A metal-joining structure (100) includes: an iron alloy part (1); an aluminum alloy part (2); and a joining interface layer (3) provided between the iron alloy part (1) and the aluminum alloy part (2). The joining interface layer (3) includes: an iron-silicon solid-solution-phase sublayer (4) in contact with the iron alloy part (1); an aluminum-silicon eutectic-phase sublayer (5) in contact with the aluminum alloy part (2); and a silicon sublayer (6) provided between the iron-silicon solid-solution-phase sublayer (4) and the aluminum-silicon eutectic-phase sublayer (5).
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: November 16, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takafumi Fujii, Yoshikazu Nakano
  • Publication number: 20210324798
    Abstract: An oil supply device of an aircraft gas turbine includes: a lubrication extraction pipe including a first end and a second end, the first end communicating with a compressor of the gas turbine, an ejection port being provided at the second end and directed to a lubricated member; an oil tank configured to store oil; an oil pipe including a first end and a second end, the first end communicating with the oil tank, the second end communicating with the lubrication extraction pipe; and an electric pump interposed on a portion of the oil pipe and configured to suck the oil from the oil tank and supply the oil to an inside of the lubrication extraction pipe.
    Type: Application
    Filed: September 3, 2019
    Publication date: October 21, 2021
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Takafumi FUJII, Tatsuya OKUWA
  • Patent number: 11133858
    Abstract: Provide a system capable of improving a frequency utilization efficiency of a feeder link of an aerial-floating type communication relay apparatus. A system, which has an aerial-staying type communication relay apparatus that wirelessly communicates with a terminal apparatus, is provided with plural gateway stations that perform space-division multiplexing communication for transmitting and receiving different relay signals from each other on a same frequency in a feeder link with the aerial-stay type communication relay apparatus. Each of the plural gateway stations may be provided with an antenna control section that controls an antenna for feeder link so as to track the aerial-stay type communication relay apparatus.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: September 28, 2021
    Assignee: HAPSMobile Inc.
    Inventors: Takafumi Fujii, Teruya Fujii
  • Publication number: 20210250083
    Abstract: Provide a system capable of improving a frequency utilization efficiency of a feeder link of an aerial-floating type communication relay apparatus. A system, which has an aerial-staying type communication relay apparatus that wirelessly communicates with a terminal apparatus, is provided with plural gateway stations that perform space-division multiplexing communication for transmitting and receiving different relay signals from each other on a same frequency in a feeder link with the aerial-stay type communication relay apparatus. Each of the plural gateway stations may be provided with an antenna control section that controls an antenna for feeder link so as to track the aerial-stay type communication relay apparatus.
    Type: Application
    Filed: August 7, 2019
    Publication date: August 12, 2021
    Applicant: HAPSMobile Inc.
    Inventors: Takafumi Fujii, Teruya Fujii
  • Publication number: 20210245301
    Abstract: A metal-joining structure (100) includes: an iron alloy part (1); an aluminum alloy part (2); and a joining interface layer (3) provided between the iron alloy part (1) and the aluminum alloy part (2). The joining interface layer (3) includes: an iron-silicon solid-solution-phase sublayer (4) in contact with the iron alloy part (1); an aluminum-silicon eutectic-phase sublayer (5) in contact with the aluminum alloy part (2); and a silicon sublayer (6) provided between the iron-silicon solid-solution-phase sublayer (4) and the aluminum-silicon eutectic-phase sublayer (5).
    Type: Application
    Filed: July 24, 2018
    Publication date: August 12, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takafumi FUJII, Yoshikazu NAKANO
  • Publication number: 20210234190
    Abstract: A lithium ion secondary battery that can operate in a high-temperature environment of 85° C. The lithium ion secondary battery includes a positive electrode active material that can store and release lithium ions Li|, a positive electrode binder that binds the positive electrode active material, a negative electrode active material that can store and release lithium ions Li+, a negative electrode binder that binds the negative electrode active material, and an electrolytic solution containing an organic solvent and an imide-based lithium salt. The negative electrode active material is previously doped with lithium ions. The positive electrode binder has a Hansen solubility parameter-based relative energy difference (RED) value of more than 1 with respect to the electrolytic solution.
    Type: Application
    Filed: April 26, 2019
    Publication date: July 29, 2021
    Applicant: JTEKT CORPORATION
    Inventors: Yukihiro KOMATSUBARA, Takumi MIO, Kentaro IIZUKA, Takafumi FUJII, Koji NISHI, Naoki OHMI, Yusuke KIMOTO
  • Publication number: 20200380874
    Abstract: A system and a method for suppressing a deterioration of communication quality due to frequent occurrence of handovers at cell boundaries of a plurality of cells formed by a plurality of radio relay apparatuses that can move in an upper airspace, are provided. In the system, each of the plurality of radio relay apparatuses for performing a radio communication with a terminal apparatus comprises a radio relay station which is movably provided by flying in an upper airspace, forms a cell toward the ground or the sea, and performs a radio communication with a terminal apparatus located in the cell. Each of the plurality of radio relay apparatuses flies in cooperation with each other so as to maintain a positional relationship between the radio relay apparatuses by an autonomous control or external control.
    Type: Application
    Filed: January 22, 2019
    Publication date: December 3, 2020
    Applicant: SoftBank Corp.
    Inventors: Takafumi Fujii, Yoshichika Ota, Kenji Hoshino
  • Patent number: 10603887
    Abstract: An apparatus includes a control device for a first suction portion, a second suction portion, and a folding portion so that each time a separator is folded, a positive electrode and a negative electrode are alternately sandwiched between folded surfaces of the separator. The control device controls the at least one of the first suction portion and the second suction portion so that doping foil is bonded to one of a current collector, the positive electrode, and the negative electrode sucked and held by the at least one of the first suction portion and the second suction portion. The control device controls the at least one of the first suction portion and the second suction portion so that the one of the current collector, the positive electrode, and the negative electrode having the lithium metal foil bonded thereto is transported and sandwiched between a predetermined pair of the folded surfaces of the separator.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 31, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Masaru Fuse, Kazuya Suzuki, Takafumi Fujii
  • Patent number: 10090115
    Abstract: An energy storage device before pre-doping includes positive electrodes, negative electrodes, separators, a cover, an electrolyte solution, a positive terminal, a negative terminal, and pre-doping metal foil. Each of the positive electrodes and the negative electrodes respectively include: positive collector foil and negative collector foil each having holes; and a positive active-material layer and a negative active-material layer arranged on at least one side of the collector foil. Either one or both of the positive electrodes and the negative electrodes include a pre-doping-targeted electrode, in which the pre-doping metal foil is arranged in direct contact with the surface of the active-material layer, and a non-arrangement part, in which the pre-doping metal foil is not arranged, is formed in at least part of the outer periphery of the active-material layer.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 2, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Takumi Mio, Takashi Matsuura, Naoki Ohmi, Takafumi Fujii
  • Patent number: 10076855
    Abstract: An apparatus and a method for manufacturing an electricity storage material are provided which can avoid defective coating of the electricity storage material. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves a thickener in a solvent; a viscosity adjusting device that adjusts viscosity of a solution produced by the dissolving device; a first filtering device that filters the solution having the viscosity adjusted by the viscosity adjusting device; and a kneading device that kneads the solution filtered by the first filtering device and an active material. Since the apparatus can remove almost all microgels of the thickener by the first filtering device, defective coating can be prevented in the coating of the electricity storage material, and satisfactory electrodes can be manufactured.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: September 18, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Takumi Mio, Takafumi Fujii, Yoshifumi Fukaya
  • Publication number: 20180043672
    Abstract: An apparatus includes a control device for a first suction portion, a second suction portion, and a folding portion so that each time a separator is folded, a positive electrode and a negative electrode are alternately sandwiched between folded surfaces of the separator. The control device controls the at least one of the first suction portion and the second suction portion so that doping foil is bonded to one of a current collector, the positive electrode, and the negative electrode sucked and held by the at least one of the first suction portion and the second suction portion. The control device controls the at least one of the first suction portion and the second suction portion so that the one of the current collector, the positive electrode, and the negative electrode having the lithium metal foil bonded thereto is transported and sandwiched between a predetermined pair of the folded surfaces of the separator.
    Type: Application
    Filed: August 7, 2017
    Publication date: February 15, 2018
    Applicant: JTEKT CORPORATION
    Inventors: Masaru FUSE, Kazuya SUZUKI, Takafumi FUJII
  • Patent number: 9825298
    Abstract: An apparatus and method for manufacturing an electricity storage material are provided which allow easily measuring the dissolution rate to solubility of a solution of a powder thickener dissolved in a liquid solvent. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves in a liquid solvent a thickener as powder that is ionized when dissolved; and a dissolution-rate-to-solubility determining device that measures conductivity of the solution produced by the dissolving device and determines a dissolution rate to solubility of the solution based on the measured conductivity. The dissolution rate to solubility can thus be determined without the need to stop the dissolving device during dissolution of the thickener in the liquid solvent. This can significantly improve production efficiency. Since excessive operation of the dissolving device can be prevented, energy saving can be achieved.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: November 21, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Takumi Mio, Yoshifumi Fukaya, Takafumi Fujii
  • Publication number: 20170154736
    Abstract: An energy storage device before pre-doping includes positive electrodes, negative electrodes, separators, a cover, an electrolyte solution, a positive terminal, a negative terminal, and pre-doping metal foil. Each of the positive electrodes and the negative electrodes respectively include: positive collector foil and negative collector foil each having holes; and a positive active-material layer and a negative active-material layer arranged on at least one side of the collector foil. Either one or both of the positive electrodes and the negative electrodes include a pre-doping-targeted electrode, in which the pre-doping metal foil is arranged in direct contact with the surface of the active-material layer, and a non-arrangement part, in which the pre-doping metal foil is not arranged, is formed in at least part of the outer periphery of the active-material layer.
    Type: Application
    Filed: November 21, 2016
    Publication date: June 1, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Takumi MIO, Takashi Matsuura, Naoki Ohmi, Takafumi Fujii
  • Patent number: 9662806
    Abstract: A kneading device includes: a preliminary kneading device that produces a preslurry by agitating a powder and a liquid introduced and transferring them while wetting the powder with the liquid; and a main kneading device that causes the powder to be uniformly dispersed in the preslurry supplied from the preliminary kneading device to produce a slurry. The main kneading device includes a gap defined by two conical surfaces that face each other with a predetermined distance therebetween and rotate relative to each other about their central axes. The slurry is produced by passing the preslurry through the gap. With the preliminary kneading device, the powder is dispersed in the liquid after conforming to the liquid, which suppress damage to the powder. The conditions of main kneading can be changed only by adjusting the gap, which facilitates the operation of changing the conditions of the main kneading.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: May 30, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Takafumi Fujii, Masaru Fuse, Takumi Mio
  • Patent number: 9531007
    Abstract: A production apparatus for an electric storage material includes a dissolution device that dissolves a thickener in a solvent by applying vibration to the solvent, and a kneading device that kneads a solution of the thickener having an adjusted viscosity and an active substance. The thickener is dissolved in the solvent, and a powder of the active substance and the like are dispersed and kneaded in the solution of the thickener having the adjusted viscosity. Thus, kneading can be performed in a short time, and damage to the active substance can be suppressed.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: December 27, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Takumi Mio, Koji Nishi, Junya Fujita, Yoshifumi Fukaya, Takafumi Fujii, Kazuya Suzuki
  • Publication number: 20160108505
    Abstract: A method for producing a starting material for cutting capable of sufficiently eliminating residual stress is provided. The present invention is for producing a starting material for cutting which is a starting material for cutting to be cut/machined into a cut/machined product. The present invention includes a step for obtaining a primary molded article (1) by subjecting a molding material to primary forming, a step for subjecting the primary molded article (1) to a solution treatment and then quenching processing, and a step for subjecting the primary molded article (1) to secondary forming by cold forging after performing the quenching treatment, and obtaining a secondary molded article (2) as a starting material for cutting. The shape of the primary molded article (1) is determined in a manner as to eliminate the residual stress accumulating in the primary molded article (1) by the secondary forming.
    Type: Application
    Filed: July 1, 2014
    Publication date: April 21, 2016
    Applicant: SHOWA DENKO K.K.
    Inventors: Takafumi FUJII, Yasuo OKAMOTO
  • Publication number: 20150360392
    Abstract: An apparatus and a method for manufacturing an electricity storage material are provided which can avoid defective coating of the electricity storage material. An apparatus for manufacturing an electricity storage material includes: a dissolving device that dissolves a thickener in a solvent; a viscosity adjusting device that adjusts viscosity of a solution produced by the dissolving device; a first filtering device that filters the solution having the viscosity adjusted by the viscosity adjusting device; and a kneading device that kneads the solution filtered by the first filtering device and an active material. Since the apparatus can remove almost all microgels of the thickener by the first filtering device, defective coating can be prevented in the coating of the electricity storage material, and satisfactory electrodes can be manufactured.
    Type: Application
    Filed: June 5, 2015
    Publication date: December 17, 2015
    Applicant: JTEKT Corporation
    Inventors: Takumi MIO, Takafumi FUJII, Yoshifumi Fukaya