Patents by Inventor Keishi Matsumoto

Keishi Matsumoto 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).

  • Publication number: 20210348247
    Abstract: A steel material for sliding members with improved seizure resistance is provided. A steel material for sliding members has a chemical composition including, in mass %, 0.05 to 5.0% In, and a microstructure with metal In particles or particles of oxides mainly composed of In dispersed therein, those ones of the metal In particles which have diameters of 50 nm to 5 ?m being in a number density not lower than 5000 particles/mm2 or those ones of the particles of oxides mainly composed of In which have diameters not smaller than 1 ?m being in a number density not lower than 30 particles/mm2.
    Type: Application
    Filed: August 22, 2019
    Publication date: November 11, 2021
    Inventors: Kazuyuki KITAMURA, Makoto MIYAJIMA, Keishi MATSUMOTO
  • Publication number: 20200283907
    Abstract: A method for producing a chemically treated alloy material is provided that suppresses a decrease in chemical treatability even in a case where chemical treatment is repeatedly performed. The method for producing a chemically treated alloy material of the present disclosure includes a chemical treatment step and a treatment solution regeneration step. In the chemical treatment step, an alloy material (6) is immersed in an oxalate treatment solution (4) containing oxalate ions and fluorine ions to perform a chemical treatment. In the treatment solution regeneration step, light is radiated to the oxalate treatment solution (4) during the chemical treatment and/or the oxalate treatment solution (4) after the chemical treatment.
    Type: Application
    Filed: November 21, 2018
    Publication date: September 10, 2020
    Inventors: Takamitsu TAKAGI, Makoto MIYAJIMA, Keishi MATSUMOTO, Sayuri IWATA, Akira TSUTO
  • Patent number: 10626345
    Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: April 21, 2020
    Assignees: NIPPON STEEL CORPORATION, VALLOUREC MANNESMANN OIL & GAS FRANCE
    Inventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stephanie Rai
  • Patent number: 9725671
    Abstract: A lubricant film-forming composition includes as a composition: 40 to 80 mass % of a base oil consisting of one or more selected from pentaerythritol fatty acid ester and trimethylolpropane fatty acid ester; 5 to 20 mass % of a solidifying agent consisting of paraffin wax; and 10 to 40 mass % of a solid lubricant consisting of one or more selected from alkali metal salt of hydroxystearic acid and alkali earth metal salt of hydroxystearic acid. A total content of the base oil, the solidifying agent, and the solid lubricant is 85 mass % or more and 100 mass % or less, and the lubricant film-forming composition does not contain heavy metals.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: August 8, 2017
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC OIL AND GAS FRANCE
    Inventors: Keishi Matsumoto, Kunio Goto, Masayoshi Sasaki
  • Publication number: 20160230119
    Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.
    Type: Application
    Filed: November 2, 2015
    Publication date: August 11, 2016
    Inventors: Kunio GOTO, Takayuki KAMIMURA, Masaru TAKAHASHI, Keishi MATSUMOTO, Michihiko IWAMOTO, Ryuichi IMAI, Stephanie RAI
  • Publication number: 20160208194
    Abstract: A lubricant film-forming composition includes as a composition: 40 to 80 mass % of a base oil consisting of one or more selected from pentaerythritol fatty acid ester and trimethylolpropane fatty acid ester; 5 to 20 mass % of a solidifying agent consisting of paraffin wax; and 10 to 40 mass % of a solid lubricant consisting of one or more selected from alkali metal salt of hydroxystearic acid and alkali earth metal salt of hydroxystearic acid. A total content of the base oil, the solidifying agent, and the solid lubricant is 85 mass % or more and 100 mass % or less, and the lubricant film-forming composition does not contain heavy metals.
    Type: Application
    Filed: September 2, 2014
    Publication date: July 21, 2016
    Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC OIL AND GAS FRANCE
    Inventors: Keishi MATSUMOTO, Kunio GOTO, Masayoshi SASAKI
  • Patent number: 9321982
    Abstract: In a threaded joint for pipes constituted by a pin and a box, each having a contact surface comprising a threaded portion and an unthreaded metal contact portion, the contact surface of the pin has a solid corrosion protective, preferably transparent coating based on a UV-curable resin and the contact surface of the box has a solid lubricating coating having plastic or viscoplastic rheological behavior which is preferably formed by the hot melt technique from a composition comprising a thermoplastic polymer, a wax, a metal soap, a corrosion inhibitor, a water-insoluble liquid resin, and a solid lubricant.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: April 26, 2016
    Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, VALLOUREC MANNESMANN OIL & GAS FRANCE
    Inventors: Kunio Goto, Takayuki Kamimura, Masaru Takahashi, Keishi Matsumoto, Michihiko Iwamoto, Ryuichi Imai, Stéphanie Raï
  • Patent number: 9277600
    Abstract: A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided. A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: March 1, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi Matsumoto, Hideaki Miyake, Hideaki Kimura, Satoshi Koide
  • Publication number: 20150271615
    Abstract: An acoustic device includes a housing, a loudspeaker, a terminal provided for the housing, an identifying section that specifies an external unit mounted on the terminal, and a control section that determines a control content corresponding to the external unit identified by the identifying section and controls the loudspeaker according to the determined control content.
    Type: Application
    Filed: November 8, 2013
    Publication date: September 24, 2015
    Inventors: Masaya Kano, Kenji Kawano, Susumu Kumazawa, Satoshi Yoshiizumi, Norimasa Hattori, Daigo Sugiura, Keishi Matsumoto
  • Patent number: 9120136
    Abstract: In a drawing method of a metallic tube which includes: filling a high-pressure container with a lubricating oil, the container having a mother tube inserted thereinto; pressurizing the oil with a pressure booster; and drawing the forcedly lubricated mother tube, the oil having a kinetic viscosity of 100 to 2000 mm2/s at 40° C. and at normal pressure and a viscosity pressure coefficient of 15 to 24 GPa?1 at 40° C. is used for preventing seizing and vibrations in drawing and for suppressing the deterioration of surface roughness due to oil pits in tube. Herein, the oil preferably contains one or more of extreme-pressure (EP) additives in a total amount of 10 mass % or more, being selected from a sulfur-based additive, a chlorine-based additive, an organic calcium metallic salt, a phosphorus-based additive, an organic zinc-based additive, and an organic molybdenum-based additive, each having a prescribed amount of relevant element.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: September 1, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masatoshi Toyoda, Keishi Matsumoto
  • Patent number: 8846152
    Abstract: There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600° C. The inorganic compound mainly softens in the low-temperature range of about 600° C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300° C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: September 30, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Junichi Nishimori, Yasuyoshi Hidaka, Keishi Matsumoto, Takahisa Kato, Shuichi Akiyama
  • Patent number: 8815347
    Abstract: There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: August 26, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kazuhiro Shimoda, Keishi Matsumoto, Yasuyoshi Hidaka, Tomio Yamakawa, Shuichi Akiyama, Takahisa Kato
  • Publication number: 20140091084
    Abstract: A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided. A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.
    Type: Application
    Filed: June 20, 2013
    Publication date: April 3, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi Matsumoto, Hideaki Miyake, Hideaki Kimura, Satoshi Koide
  • Patent number: 8671727
    Abstract: A blank tube for cold drawing is used for the production of a longer-length, small-diameter tube such as a heat-transfer tube for steam generation in nuclear power facilities, wherein the blank tube will not cause scoring and chattering vibration in a drawing process. The blank tube is used to produce a cold drawn tube through cold drawing of the blank tube. The average surface roughness Ra (ANSI B46.1) of the inner surface of blank tube before drawing satisfies the condition: 0.10 ?m?Ra?1.00 ?m in the case of a blank tube for cold drawing for use in an oil-lubricated drawing. In particular, the surface roughness Ra satisfies the condition: 0.10 ?m?Ra?0.50 ?m in the case of a blank tube for use in a high-pressure lubrication drawing and made of an austenitic alloy for use in a heat-transfer tube for a steam generator.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: March 18, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Masatoshi Toyoda, Keishi Matsumoto
  • Patent number: 8586644
    Abstract: A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: November 19, 2013
    Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas France, Chugoku Marine Paints, Ltd.
    Inventors: Tomomitsu Nagareo, Yoshinori Kameda, Keishi Matsumoto, Takayuki Kamimura, Masaru Takahashi, Kunio Goto, Ryuichi Imai
  • Patent number: 8557750
    Abstract: A solid lubricating coating formed on a contact surface of a threaded joint for pipes has a matrix of a lubricating oil-containing polymer. The lubricating oil-containing polymer has either a uniform composition or a gradient composition in which the concentration of lubricating oil decreases towards the contact surface and in which there is substantially no lubricating oil in the vicinity of the contact surface.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: October 15, 2013
    Assignees: Nippon Steel & Sumitomo Metal Corporation, Vallourec Mannesmann Oil & Gas France
    Inventors: Takao Kuranishi, Kunio Goto, Keishi Matsumoto
  • Publication number: 20130202803
    Abstract: There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.
    Type: Application
    Filed: July 13, 2011
    Publication date: August 8, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuhiro Shimoda, Keishi Matsumoto, Yasuyoshi Hidaka, Tomio Yamakawa, Shuichi Akiyama, Takahisa Kato
  • Publication number: 20130115376
    Abstract: There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600° C. The inorganic compound mainly softens in the low-temperature range of about 600° C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300° C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.
    Type: Application
    Filed: July 13, 2011
    Publication date: May 9, 2013
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Junichi Nishimori, Yasuyoshi Hidaka, Keishi Matsumoto, Takahisa Kato, Shuichi Akiyama
  • Publication number: 20130086959
    Abstract: In a drawing method of a metallic tube which includes: filling a high-pressure container with a lubricating oil, the container having a mother tube inserted thereinto; pressurizing the oil with a pressure booster; and drawing the forcedly lubricated mother tube, the oil having a kinetic viscosity of 100 to 2000 mm2/s at 40° C. and at normal pressure and a viscosity pressure coefficient of 15 to 24 GPa?1 at 40° C. is used for preventing seizing and vibrations in drawing and for suppressing the deterioration of surface roughness due to oil pits in tube. Herein, the oil preferably contains one or more of extreme-pressure (EP) additives in a total amount of 10 mass % or more, being selected from a sulfur-based additive, a chlorine-based additive, an organic calcium metallic salt, a phosphorus-based additive, an organic zinc-based additive, and an organic molybdenum-based additive, each having a prescribed amount of relevant element.
    Type: Application
    Filed: June 7, 2011
    Publication date: April 11, 2013
    Inventors: Masatoshi Toyoda, Keishi Matsumoto
  • Patent number: 8411883
    Abstract: A loudspeaker apparatus includes a speaker array that has a plurality of speaker units which are arranged on a sound emitting surface of the speaker array, and emits sound beams on a plurality of channels, an angle sensing section that senses an angle change displaced from a previously set reference angle of the sound emitting surface, and an adjusting section that adjusts output angles of the sound beams in response to the angle change.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: April 2, 2013
    Assignee: Yamaha Corporation
    Inventor: Keishi Matsumoto