Patents by Inventor Hideki Fujii

Hideki 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: 11957074
    Abstract: A work vehicle including a vehicle body, a pair of left and right driving wheels that movably support the vehicle body, a pair of motors capable of rotatably driving the left and right driving wheels respectively, a pair of maneuvering levers pivotally supported to the vehicle body to be pivotable about a horizontal axis extending in a vehicle body transverse direction and capable of adjusting rotational speeds of the left and right driving wheels respectively, and a pair of solid dynamic vibration absorbing portions supported to respective free end portions of the maneuvering levers and capable of suppressing vibrations of the maneuvering levers, wherein each solid dynamic vibration absorbing portion of the pair of solid dynamic vibration absorbing portions includes a weight within an elastic body, wherein the weight and the elastic body have equal longitudinal lengths.
    Type: Grant
    Filed: December 28, 2021
    Date of Patent: April 16, 2024
    Assignee: KUBOTA CORPORATION
    Inventors: Yuto Fujii, Justin McCallister, Hideki Aoki
  • Publication number: 20240084469
    Abstract: A method for producing a titanium foil according to the present invention includes an electrodeposition step of performing electrolysis with electrodes including an anode and a cathode using a molten salt bath comprising titanium ions and having at least one molten chloride to deposit metal titanium onto an electrolytic surface of the cathode, wherein the electrodeposition step includes maintaining a ratio of a molar concentration of titanium ions to the total molar concentration of metal ions in the molten salt bath at 7% or more, and maintaining a temperature of the molten salt bath at 510° C. or less, and conducting a current to the electrodes under conditions where a continuous stop time of current conduction is less than 1.0 second, a current density is 0.10 A/cm2 or more and 1.0 A/cm2 or less, and a time for electrodepositing the metal titanium onto the electrolytic surface of the cathode is 120 minutes or less.
    Type: Application
    Filed: February 22, 2022
    Publication date: March 14, 2024
    Inventors: Takumi Kaneko, Yuta Nakajo, Daisuke Suzuki, Matsuhide Horikawa, Hideki Fujii
  • Patent number: 11814703
    Abstract: Provided is a titanium composite material 1 including: a first surface layer portion 2; an inner layer portion 4; and a second surface layer portion 3; wherein: the first surface layer portion 2 and the second surface layer portion 3 are composed of a titanium alloy; the inner layer portion 4 is composed of a commercially pure titanium including pores; a thickness of at least one of the first surface layer portion 2 and the second surface layer portion 3 is 2 ?m or more, and a proportion of the thickness with respect to an overall thickness of the titanium composite material 1 is 40% or less; and a porosity in a cross section perpendicular to a sheet thickness direction is more than 0% and 30% or less.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: November 14, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tomoyuki Kitaura, Yoshihisa Shirai, Hideki Fujii
  • Patent number: 11649554
    Abstract: A method for producing metal titanium by carrying out electrolysis using an anode and a cathode in a molten salt bath, the method using an anode containing metal titanium as the anode, the method comprising a titanium deposition step of depositing metal titanium on the cathode, wherein, in the titanium deposition step, a temperature of the molten salt bath is from 250° C. or more and 600° C. or less, and an average current density of the cathode in a period from the start to 30 minutes later of the titanium deposition step is maintained in a range of 0.01 A/cm2 to 0.09 A/cm2.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: May 16, 2023
    Assignee: Toho Titanium Co., Ltd.
    Inventors: Matsuhide Horikawa, Daisuke Suzuki, Haruka Yamamoto, Hideki Fujii
  • Patent number: 11542581
    Abstract: A titanium product includes an inner layer portion and a surface layer portion joined to the inner layer portion. The surface layer portion has a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: 0.020% or less, the balance: Ti and impurities. The inner layer portion 3 has pores and a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: more than 0.020% and 0.60%, the balance: Ti and impurities. The area fraction of the pores in the inner layer portion in a cross-section perpendicular to the longitudinal direction of the titanium product is more than 0% and not more than 30%. The Cl content (ClI) of the inner layer portion, a thickness (tS) of the surface layer portion, and a thickness (tI) of the inner layer portion satisfy the expression [ClI?0.03+0.02×tS/tI].
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: January 3, 2023
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tomoyuki Kitaura, Yoshihisa Shirai, Hideki Fujii
  • Patent number: 11504765
    Abstract: Provided is a titanium cast product for hot rolling made of commercially pure titanium, the titanium cast product including a melted and resolidified layer in a range of more than or equal to 1 mm in depth on a surface serving as a rolling surface, the melted and resolidified layer being obtained by adding one or more elements out of any one of or both of at least one ? stabilizer element and at least one neutral element to the surface, and melting and resolidifying the surface. An average value of a total concentration of the at least one ? stabilizer element and the at least one neutral element in the range of more than or equal to 1 mm in depth is higher than a total concentration of the at least one ? stabilizer element and the at least one neutral element in a base metal by, in mass %, more than or equal to 0.1% and less than 2.0%.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: November 22, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tomonori Kunieda, Yoshitsugu Tatsuzawa, Hideki Fujii
  • Patent number: 11479839
    Abstract: A method for producing a hot-rolled titanium plate includes, [1] melting at least one part of the side surface of the titanium slab by radiating a beam or plasma toward the side surface, not toward the surface to be rolled, and thereafter causing re-solidification to form, in the side surface, a layer having grain diameter of 1.5 mm or less and a depth of 3.0 mm or more from the side surface; [2] performing a finishing process on the surface to be rolled of the titanium slab in which the layer is formed, to thereby bring a slab flatness index X to 3.0 or less; and [3] subjecting the titanium slab after the finishing process to hot rolling under a condition in which a length of an arc of contact of a roll L in a first pass of rough rolling is 230 mm or more.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: October 25, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yoshitsugu Tatsuzawa, Tomonori Kunieda, Kenichi Mori, Kazuhiro Takahashi, Hideki Fujii
  • Patent number: 11459649
    Abstract: A titanium sheet including the following chemical components in mass %: Cu: 0.70 to 1.50%, Cr: 0 to 0.40%, Mn: 0 to 0.50%, Si: 0.10 to 0.30%, O: 0 to 0.10%, Fe: 0 to 0.06%, N: 0 to 0.03%, C: 0 to 0.08%, H: 0 to 0.013%, elements except the above and Ti: 0 to 0.1% each, with a total amount of the elements being 0.3% or less, and the balance: Ti, wherein A value defined by Formula (1) is 1.15 to 2.5 mass %, and the titanium sheet having a metal microstructure in which an area fraction of an ? phase is 95% or more, an area fraction of a ? phase is 5% or less, and an area fraction of an intermetallic compound is 1% or less, wherein an average crystal grain size D (?m) of the ? phase is 20 to 70 ?m and satisfies Formula (2).
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: October 4, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hidenori Takebe, Kazuhiro Takahashi, Hideki Fujii
  • Publication number: 20220274167
    Abstract: A method for producing a metallic green compact 61 relates to a method for producing the green compact 61 having at least one recess 62, including a step of subjecting a raw material powder filled in a resin mold 1 to cold isostatic pressing while placing a resin core material 11 having a shape corresponding to the recess 62 at a position corresponding to the recess 62 in the resin mold 1.
    Type: Application
    Filed: September 24, 2020
    Publication date: September 1, 2022
    Inventors: Masahiro Morita, Masashi Hayakawa, Yosuke Inoue, Hideki Fujii
  • Patent number: 11378086
    Abstract: A small-sized electric fan using a USB power source has such a structure that the small-sized electric fan is provided with: a body case 1; a blade part 2; a motor M that rotationally drives the blade part; a USB cable 3 provided with a connector 4 that is detachably connected to the USB power source; and a lid case 5 that is provided to the body case 1 so as to be openable/closable and turnable, in which the body case 1 is provided with a groove part 12 that can store therein the USB cable when the USB cable 3 is wound around the groove part 12, on a case side surface part 11 along a rotation direction of the blade part 2, a connector inserting part 14 to which the connector 4 of the USB cable 3 can be inserted is provided on the case side surface part 11 or a case back surface part 13 of the body case 1, and the USB cable 3 has a cable length that allows the connector 4 to be inserted to the connector inserting part 14, when the USB cable 3 is wound around the groove part 12 of the case side surface part 11
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: July 5, 2022
    Assignee: RHYTHM CO., LTD.
    Inventors: Hajime Ikeuchi, Hideki Fujii
  • Patent number: 11359298
    Abstract: A titanium foil or a titanium sheet is produced by electrodeposition from molten salt using constant current pulse, the method comprising: forming an electrodeposited titanium film on a surface of a cathode electrode made of glassy carbon, graphite, Mo, and Ni, and separating thereafter the electrodeposited titanium film from the cathode electrode by performing one or both of applying an external force to the electrodeposited titanium film and removing the cathode electrode. This enables the electrodeposited titanium film electrodeposited on the cathode electrode to be peeled from the cathode electrode simply and at low cost.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: June 14, 2022
    Assignees: KYOTO UNIVERSITY, NIPPON STEEL CORPORATION
    Inventors: Tetsuya Uda, Kouhei Funatsu, Akihiro Kishimoto, Kenichi Mori, Hideki Fujii
  • Patent number: 11355981
    Abstract: A stator includes a stator core in which an annular back yoke is integrated with a plurality of teeth circumferentially arranged on the back yoke at intervals, and an insulator that sandwiches the stator core from axial sides of the stator core. The insulator is molded integrally with the stator core using resin molding such that the insulator covers an inner surface of a slot portion of the stator core. A motor includes a rotor and the stator radially facing the rotor. A compressor includes a hermetic container, a compression mechanism disposed in the hermetic container, the motor disposed in the hermetic container to drive the compression mechanism.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 7, 2022
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroki Shirasaka, Keiji Aota, Hideki Fujii, Shoujirou Naka, Yoshihiro Igarashi
  • Publication number: 20220162451
    Abstract: Particles containing a titanate compound according to the present invention comprise alkali metal titanate particles and binder layers, wherein the particles containing the titanate compound has a 50% particle diameter D50 of from 40 ?m to 100 ?m, and wherein a content ratio of the particles containing the titanate compound having a shorter diameter d of 3 ?m or less, a longer diameter L of 5 ?m or more, and an aspect ratio (L/d) of 3 or more is 0.05 mass % or less.
    Type: Application
    Filed: February 26, 2020
    Publication date: May 26, 2022
    Inventors: Matsuhide Horikawa, Seiichiro Tani, Hideki Fujii, Tomoaki Heya, Hideki Watanabe
  • Patent number: 11268177
    Abstract: An austenitic stainless steel according to the present invention has a chemical composition containing, by mass %: C: 0.01 to 0.15%; Si: 2.0% or less; Mn: 3.0% or less; Cr: 10.0 to 20.0%; Ni: 5.0 to 13.0%; N: 0.01 to 0.30%; Nb: 0 to 0.5%; Ti: 0 to 0.5%; and V: 0 to 0.5%, with the balance: Fe and impurities, wherein an average grain size is 10.0 ?m or less, a difference in value of an average lattice constant dAve. (={d?(111)×I?(111)+d?(200)×I?(200)+d?(220)×I?(220)+d?(311)×I?(311)}/{I?(111)+I?(200)+I?(220)+I?(311)}) of an austenite phase between a surface portion and a center portion is 0.010 ? or more, and a value of a diffraction peak integrated intensity ratio r (=100×?I?/?IALL) at a surface is 95% or more.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: March 8, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kazuhiko Adachi, Akihiro Nishimura, Shinichi Teraoka, Hideki Fujii
  • Publication number: 20210378614
    Abstract: After an operator presses a practice mode execution start switch displayed on a touch panel liquid crystal display unit in an operation unit (2) or a touch panel liquid crystal display unit in an operation unit (41) to shift an imaging mode to a practice mode, when the operation unit (2) or the operation unit (41) of the imaging unit is operated, the signal from the X-ray imaging control unit (72) is transmitted to the voice guidance output control unit (52) in a voice guidance unit (5) via a signal output unit for a voice guidance unit (73). The voice guidance output control unit (52) in the voice guidance unit (5) transmits a signal for outputting voice guidance to a speaker (51). As a result, the same voice as a voice when performing the serial imaging is output from the speaker (51). Thus, a subject can execute the practice of a breathing method or the like.
    Type: Application
    Filed: September 26, 2018
    Publication date: December 9, 2021
    Inventors: Tomoharu OKUNO, Hideki FUJII
  • Publication number: 20210336504
    Abstract: A stator includes a stator core in which an annular back yoke is integrated with a plurality of teeth circumferentially arranged on the back yoke at intervals, and an insulator that sandwiches the stator core from axial sides of the stator core. The insulator is molded integrally with the stator core using resin molding such that the insulator covers an inner surface of a slot portion of the stator core. A motor includes a rotor and the stator radially facing the rotor. A compressor includes a hermetic container, a compression mechanism disposed in the hermetic container, the motor disposed in the hermetic container to drive the compression mechanism.
    Type: Application
    Filed: July 13, 2017
    Publication date: October 28, 2021
    Inventors: Hiroki SHIRASAKA, Keiji AOTA, Hideki FUJII, Shoujirou NAKA, Yoshihiro IGARASHI
  • Publication number: 20210310140
    Abstract: A method for producing metal titanium by carrying out electrolysis using an anode and a cathode in a molten salt bath, the method using an anode containing metal titanium as the anode, the method comprising a titanium deposition step of depositing metal titanium on the cathode, wherein, in the titanium deposition step, a temperature of the molten salt bath is from 250° C. or more and 600° C. or less, and an average current density of the cathode in a period from the start to 30 minutes later of the titanium deposition step is maintained in a range of 0.01 A/cm2 to 0.09 A/cm2.
    Type: Application
    Filed: July 18, 2019
    Publication date: October 7, 2021
    Inventors: Matsuhide Horikawa, Daisuke Suzuki, Haruka Yamamoto, Hideki Fujii
  • Publication number: 20210292871
    Abstract: Provided is a titanium composite material 1 including: a first surface layer portion 2; an inner layer portion 4; and a second surface layer portion 3; wherein: the first surface layer portion 2 and the second surface layer portion 3 are composed of a titanium alloy; the inner layer portion 4 is composed of a commercially pure titanium including pores; a thickness of at least one of the first surface layer portion 2 and the second surface layer portion 3 is 2 ?m or more, and a proportion of the thickness with respect to an overall thickness of the titanium composite material 1 is 40% or less; and a porosity in a cross section perpendicular to a sheet thickness direction is more than 0% and 30% or less.
    Type: Application
    Filed: June 4, 2021
    Publication date: September 23, 2021
    Inventors: Tomoyuki KITAURA, Yoshihisa SHIRAI, Hideki FUJII
  • Patent number: 11066727
    Abstract: Provided is a titanium composite material 1 including: a first surface layer portion 2; an inner layer portion 4; and a second surface layer portion 3; wherein: the first surface layer portion 2 and the second surface layer portion 3 are composed of a titanium alloy; the inner layer portion 4 is composed of a commercially pure titanium including pores; a thickness of at least one of the first surface layer portion 2 and the second surface layer portion 3 is 2 ?m or more, and a proportion of the thickness with respect to an overall thickness of the titanium composite material 1 is 40% or less; and a porosity in a cross section perpendicular to a sheet thickness direction is more than 0% and 30% or less.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: July 20, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tomoyuki Kitaura, Yoshihisa Shirai, Hideki Fujii
  • Patent number: 10988832
    Abstract: A titanium-containing structure made of a titanium material includes: a package made of a commercially pure titanium material; and a filler packed into the package, wherein an internal pressure of the package is 10 Pa or less, the pressure being an absolute pressure, and wherein the filler includes at least one selected from titanium sponge, titanium briquette, and titanium scrap, and the filler has the same type of a chemical composition of the commercially pure titanium material. This titanium-containing structure enables production of a titanium product by performing hot working and eliminating the conventional melting step and forging step.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: April 27, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yoshihisa Shirai, Hideki Fujii, Tomoyuki Kitaura