Patents by Inventor Masahiro Nakata

Masahiro Nakata 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: 10493512
    Abstract: A method of manufacturing a press-molded article includes: projecting an inner pad, provided at an apex portion of a punch, from the punch toward a side of a die, and disposing a metal sheet blank on the inner pad; and projecting a die pad, provided at the die, from the die toward a side of the punch to dispose the die pad at a position separated from the inner pad by a predetermined distance that is greater than a plate thickness of the metal sheet blank; forming a side walls by moving the die toward the punch side relative to the die pad, the inner pad, and the punch, and integrating the die pad with the die; and forming a top plate by moving the die and the die pad, which have been integrated, and the inner pad, toward the punch side relative to the punch.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: December 3, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Toshiya Suzuki, Yoshiaki Nakazawa, Masahiro Nakata
  • Patent number: 10471493
    Abstract: Disclosed is a method to manufacture a pressed component from an intermediate stock, which includes two bent portions with a spacing thereof narrower than a width of a top plate of the pressed component, by employing a press including a die having a die pad and a punch having an inner pad, the method including: gripping a portion between the bent portions with the inner pad and the die pad in a state in which the inner pad projects from the punch and the die pad projects from the die; moving the die toward the punch side to form vertical walls of the pressed component with the die and the punch; and integrating the die and the die pad and then moving the die, the die pad and the inner pad toward the punch side to form the top plate.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: November 12, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Toshiya Suzuki, Yoshiaki Nakazawa, Masahiro Nakata
  • Publication number: 20190336438
    Abstract: An object of the present invention is to provide a composition for external use having excellent percutaneous absorption properties. A composition for external use comprising a water-soluble fraction dispersed in an oily phase, wherein the water-soluble fraction contains a surfactant and a solution in which a water-soluble substance is dissolved in water, and the content of the water in the water-soluble fraction is 0.1 to 2.5% by weight based on the composition for external use.
    Type: Application
    Filed: December 26, 2017
    Publication date: November 7, 2019
    Inventors: Takahiro Nakata, Junji Akaki, Masahiro Goto
  • Patent number: 10456865
    Abstract: A welding method for joining together a plurality of welding objects by overlapping the plurality of welding objects and performing laser welding includes forming a weld by forming a plurality of nuggets along a virtual closed curve on the welding objects, by laser welding. A ratio of a diameter of the nuggets to a pitch dimension between the nuggets that are adjacent to each other is larger than ½ and no more than 1.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: October 29, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei Hisada, Shuhei Ogura, Junichiro Makino, Kazuyuki Ogusu, Masahiro Nakata
  • Publication number: 20190315047
    Abstract: A biaxially oriented polypropylene film containing a polypropylene resin, the film having a thickness of 1.0 to 3.0 ?m, and a molecular orientation coefficient ?Nx of 0.013 to 0.016, as calculated according to ?Nx=(?Nxy+?Nxz)/2 on the basis of a birefringence value ?Nxy in the slow axis direction with respect to the fast axis direction and a birefringence value ?Nxz in the slow axis direction with respect to the thickness direction, as measured via optical birefringence measurement.
    Type: Application
    Filed: December 28, 2017
    Publication date: October 17, 2019
    Inventors: Takeshi TOMINAGA, Michiko SUEYOSHI, Yoshimune OKUYAMA, Yoshikazu FUJISHIRO, Masahiro NAKATA, Tadakazu ISHIWATA
  • Publication number: 20190309398
    Abstract: A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 60%, and bainite: 40 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 ?m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. A precipitate density of Ti(C,N) and Nb(C,N) each having a circle-equivalent diameter of 10 nm or less is 1010 precipitates/mm3 or more. A ratio (Hvs/Hvc) of a hardness at 20 ?m in depth from a surface (Hvs) to a hardness of the center of a sheet thickness (Hvc) is 0.85 or more.
    Type: Application
    Filed: August 4, 2017
    Publication date: October 10, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kohichi SANO, Makoto UNO, Ryoichi NISHIYAMA, Yuji YAMAGUCHI, Natsuko SUGIURA, Masahiro NAKATA
  • Patent number: 10431380
    Abstract: Provided is a biaxially stretched polypropylene film for capacitors having a thin thickness and having excellent initial voltage resistance and excellent long-term heat resistance and voltage resistance, and also provided is a metallized polypropylene film for capacitors. The polypropylene film for capacitors is obtained by biaxially stretching a polypropylene resin, the polypropylene film having a crystallite size of 122 ? or less as determined by the Scherrer's equation from the half width of the reflection peak from (040) plane of ?-crystal measured by a wide angle X-ray diffraction method, and the polypropylene film having a value of birefringence ?Nyz with respect to a thickness direction of 7.0×10?3 or more and 10.0×10?3 or less as measured by an optical birefringence measurement.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: October 1, 2019
    Assignee: OJI HOLDINGS CORPORATION
    Inventors: Masahiro Nakata, Kazuo Ikeda, Tadakazu Ishiwata, Akihiro Kakehi, Yoshinori Matsuo, Yuichi Shishido, Shigeo Murase
  • Publication number: 20190284354
    Abstract: A biaxially stretched polypropylene film including a polypropylene resin and satisfying the following: (a) the crystallite size Sa, which is determined using the Scherrer equation from the full width at half maximum of the ?-crystal (040) plane reflection peak as measured by wide-angle x-ray diffraction after treatment for 200 hours at 105° C., is not more than 12.9 nm; and (b) the planar orientation coefficient ?Pa, which is calculated from the birefringence values ?Nyz and ?Nxz with respect to the thickness direction as determined by optical birefringence measurement after treatment for 200 hours at 105° C., is at least 0.013 (?Pa=(?Nyz+?Nxz)/2).
    Type: Application
    Filed: September 20, 2017
    Publication date: September 19, 2019
    Inventors: Takeshi TOMINAGA, Michiko SUEYOSHI, Yoshimune OKUYAMA, Masahiro NAKATA, Tadakazu ISHIWATA
  • Publication number: 20190241996
    Abstract: A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 0 to 30%, and bainite: 70 to 100%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 ?m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. A grain boundary number density of solid-solution C or a grain boundary number density of the total of solid-solution C and solid-solution B is 1 piece/nm2 or more and 4.5 pieces/nm2 or less. An average grain size of cementite precipitated at grain boundaries is 2 ?m or less.
    Type: Application
    Filed: August 4, 2017
    Publication date: August 8, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kohichi SANO, Makoto UNO, Ryoichi NISHIYAMA, Yuji YAMAGUCHI, Natsuko SUGIURA, Masahiro NAKATA
  • Publication number: 20190233926
    Abstract: A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 ?m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. Hard crystal grains A in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×1016 to 1×1019 pieces/cm3 and soft crystal grains B in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×1015 pieces/cm3 or less are contained, and the volume % of the hard crystal grains A/(the volume % of the hard crystal grains A +the volume % of the soft crystal grains B) is 0.1 to 0.9.
    Type: Application
    Filed: August 4, 2017
    Publication date: August 1, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kohichi SANO, Makoto UNO, Ryoichi NISHIYAMA, Yuji YAMAGUCHI, Natsuko SUGIURA, Masahiro NAKATA
  • Publication number: 20190226061
    Abstract: A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 30 to 95%, and bainite: 5 to 70%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 ?m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. An average aspect ratio of ellipses equivalent to the crystal grains is 5 or less. An average distribution density of the total of Ti-based carbides and Nb-based carbides each having a grain size of 20 nm or more on ferrite grain boundaries is 10 carbides/?m or less.
    Type: Application
    Filed: August 4, 2017
    Publication date: July 25, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kohichi SANO, Makoto UNO, Ryoichi NISHIYAMA, Yuji YAMAGUCHI, Natsuko SUGIURA, Masahiro NAKATA
  • Publication number: 20190185063
    Abstract: A work vehicle includes a cab, a body frame and a restrictor. The body flame includes a base component, and a support frame provided on an upper side of the base component. The support frame supports the cab. The restrictor is provided to a floor frame of the cab. The restrictor is disposed between the base component and the floor frame. The restrictor includes a retaining member disposed on a lower side of the support frame, and an impact absorber disposed on a cab side of the retaining member.
    Type: Application
    Filed: August 10, 2017
    Publication date: June 20, 2019
    Inventors: Makoto SASAKI, Masashi KATOH, Takahiro NOGUCHI, Kazuaki ADACHI, Yoshiaki NAKAZAWA, Nobutaka SHIMIZU, Masahiro NAKATA
  • Publication number: 20190184924
    Abstract: This supporting structure for an underrun protector includes a stay body that connects a beam and a frame to each other; a stay reinforcing body that reinforces the stay body from an outside in a vehicle width direction; and a gusset provided between the stay reinforcing body and the beam. A stay body web face of the stay body is provided with an opening part. A pair of wall face parts provided to extend outward in the vehicle width direction from both ends of the opening part in a vehicle forward-rearward direction is provided so as to face each other. Each of the wall face parts is provided at a height corresponding to an installation position of the gusset and abuts against an inner surface of the stay reinforcing body in the vehicle width direction.
    Type: Application
    Filed: August 24, 2017
    Publication date: June 20, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yutaka MIKAZUKI, Eiji ISOGAI, Masahiro NAKATA, Kenji YAMAMOTO
  • Publication number: 20190176204
    Abstract: Disclosed is a method to manufacture a pressed component from an intermediate stock, which includes two bent portions with a spacing thereof narrower than a width of a top plate of the pressed component, by employing a press including a die having a die pad and a punch having an inner pad, the method including: gripping a portion between the bent portions with the inner pad and the die pad in a state in which the inner pad projects from the punch and the die pad projects from the die; moving the die toward the punch side to form vertical walls of the pressed component with the die and the punch; and integrating the die and the die pad and then moving the die, the die pad and the inner pad toward the punch side to form the top plate.
    Type: Application
    Filed: December 7, 2016
    Publication date: June 13, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toshiya SUZUKI, Yoshiaki NAKAZAWA, Masahiro NAKATA
  • Patent number: 10294356
    Abstract: The present invention addresses the problem of providing a biaxially stretched polypropylene film for capacitors, which has high voltage resistance and excellent breakdown properties. The present invention also addresses the problem of providing a biaxially stretched polypropylene film for capacitors, which can be used suitably in a high-capacity capacitor to which a high voltage is to be applied under a higher temperature, and which preferably has a small thickness. The present invention relates to a biaxially stretched polypropylene film for capacitors, wherein a polypropylene resin which constitutes the polypropylene film has a number average molecular weight of 40,000 to 100,000 inclusive and a Z average molecular weight of 950,000 to 1,500,000 includes wherein, in a molecular weight distribution curve, the value of the difference obtained by subtracting a differential distribution value at a logarithmic molecular weight Log (M) of 6.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: May 21, 2019
    Assignee: OJI HOLDINGS CORPORATION
    Inventors: Tatsuji Ishida, Masahiro Nakata, Tadakazu Ishiwata, Akihiro Kakehi, Yoshinori Matsuo, Masahiro Yoda
  • Publication number: 20190070695
    Abstract: A laser welding method includes: forming a melted section in which plural metallic workpieces within a weld region are melted by projecting a first laser beam onto said weld region with parts of the workpieces being set as the weld region when the workpieces are welded; and projecting a second laser beam while the melted section is being solidified or after a solidified section in which the melted section is solidified is formed such that the second laser beam circles around center of the melted section or the solidified section from an irradiation start position deviated from said center toward said center or such that the second laser beam is focused to the center of the melted section or the solidified section from an irradiation start region that includes the center and a periphery thereof.
    Type: Application
    Filed: October 18, 2018
    Publication date: March 7, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei HISADA, Atsushi KAWAKITA, Masahiro NAKATA
  • Publication number: 20190022729
    Abstract: A method of manufacturing a press-molded article includes: projecting an inner pad, provided at an apex portion of a punch, from the punch toward a side of a die, and disposing a metal sheet blank on the inner pad; and projecting a die pad, provided at the die, from the die toward a side of the punch to dispose the die pad at a position separated from the inner pad by a predetermined distance that is greater than a plate thickness of the metal sheet blank; forming a side walls by moving the die toward the punch side relative to the die pad, the inner pad, and the punch, and integrating the die pad with the die; and forming a top plate by moving the die and the die pad, which have been integrated, and the inner pad, toward the punch side relative to the punch.
    Type: Application
    Filed: January 19, 2017
    Publication date: January 24, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toshiya SUZUKI, Yoshiaki NAKAZAWA, Masahiro NAKATA
  • Publication number: 20180371223
    Abstract: The present invention addresses the problem of providing a biaxially stretched polypropylene film for capacitors, which has high voltage resistance and excellent breakdown properties. The present invention also addresses the problem of providing a biaxially stretched polypropylene film for capacitors, which can be used suitably in a high-capacity capacitor to which a high voltage is to be applied under a higher temperature, and which preferably has a small thickness. The present invention relates to a biaxially stretched polypropylene film for capacitors, wherein a polypropylene resin which constitutes the polypropylene film has a number average molecular weight of 40,000 to 100,000 inclusive and a Z average molecular weight of 950,000 to 1,500,000 includes wherein, in a molecular weight distribution curve, the value of the difference obtained by subtracting a differential distribution value at a logarithmic molecular weight Log (M) of 6.
    Type: Application
    Filed: August 31, 2018
    Publication date: December 27, 2018
    Applicant: OJI HOLDINGS CORPORATION
    Inventors: Tatsuji ISHIDA, Masahiro NAKATA, Tadakazu ISHIWATA, Akihiro KAKEHI, Yoshinori MATSUO, Masahiro YODA
  • Patent number: 10137530
    Abstract: A laser welding method includes: forming a melted section in which plural metallic workpieces within a weld region are melted by projecting a first laser beam onto said weld region with parts of the workpieces being set as the weld region when the workpieces are welded; and projecting a second laser beam while the melted section is being solidified or after a solidified section in which the melted section is solidified is formed such that the second laser beam circles around center of the melted section or the solidified section from an irradiation start position deviated from said center toward said center or such that the second laser beam is focused to the center of the melted section or the solidified section from an irradiation start region that includes the center and a periphery thereof.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: November 27, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei Hisada, Atsushi Kawakita, Masahiro Nakata
  • Patent number: 10093792
    Abstract: The present invention addresses the problem of providing a biaxially stretched polypropylene film for capacitors, which has high voltage resistance and excellent breakdown properties. The present invention also addresses the problem of providing a biaxially stretched polypropylene film for capacitors, which can be used suitably in a high-capacity capacitor to which a high voltage is to be applied under a higher temperature, and which preferably has a small thickness. The present invention relates to a bi-axially stretched polypropylene film for capacitors, wherein a polypropylene resin which constitutes the polypropylene film has a number average molecular weight of 40,000 to 100,000 inclusive and a Z average molecular weight of 950,000 to 1,500,000 inclusive, wherein, in a molecular weight distribution curve, the value of the difference obtained by subtracting a differential distribution value at a logarithmic molecular weight Log (M) of 6.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: October 9, 2018
    Assignee: OJI HOLDINGS CORPORATION
    Inventors: Tatsuji Ishida, Masahiro Nakata, Tadakazu Ishiwata, Akihiro Kakehi, Yoshinori Matsuo, Masahiro Yoda