Patents by Inventor Akihiko Tatsumi

Akihiko Tatsumi 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: 20200377046
    Abstract: A vehicle structure includes a first member that extends in a vehicle width direction, second members that extend in a front-back direction that are inserted in the front-back direction with respect to the first member, and third members that are arranged at end portions of the first member in the vehicle width direction and joined to the end portions.
    Type: Application
    Filed: December 14, 2018
    Publication date: December 3, 2020
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Toru HASHIMURA, Taiki YAMAKAWA, Yasuhiro MAEDA, Kenichi WATANABE, Junya NAITO, Akihiko TATSUMI
  • Patent number: 10787137
    Abstract: A structural member includes an inner member and an outer member formed of a material different from that of the inner member, the outer member being positioned outside the inner member so as to surround the inner member and including a first adjacent surface adjacent to an outer surface of the inner member, wherein an insulator is disposed between the first adjacent surface and a second adjacent surface of the inner member, the second adjacent surface being adjacent to the first adjacent surface.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: September 29, 2020
    Assignee: Kobe Steel, Ltd.
    Inventors: Yasuhiro Maeda, Toru Hashimura, Ryohei Yukishige, Akihiko Tatsumi
  • Publication number: 20200139910
    Abstract: A structural member includes an inner member and an outer member formed of a material different from that of the inner member, the outer member being positioned outside the inner member so as to surround the inner member and including a first adjacent surface adjacent to an outer surface of the inner member, wherein an insulator is disposed between the first adjacent surface and a second adjacent surface of the inner member, the second adjacent surface being adjacent to the first adjacent surface.
    Type: Application
    Filed: April 20, 2017
    Publication date: May 7, 2020
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Yasuhiro MAEDA, Toru HASHIMURA, Ryohei YUKISHIGE, Akihiko TATSUMI
  • Patent number: 10357944
    Abstract: An aluminum alloy substrate bears a first layer on at least one side thereof, and a second layer on at least part of the first layer. The first layer includes an oxide film containing Mg in a content of from 0.1 atomic percent to less than 30 atomic percent. The second layer contains siloxane bonds. The second layer is disposed in a mass of coating of from 0.1 mg/m2 to less than 30 mg/m2. Assume that parallel polarized light is applied to the side bearing the first layer and the second layer at an incident angle of 75°, and resulting data are analyzed by Fourier-transform infrared spectroscopy to give a spectrum. In the spectrum, a peak occurring adjacent to 1057 cm?1 has an area of 0.01 or more with respect to a base line drawn from 1026 cm?1 to 1084 cm?1.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: July 23, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Satoru Takada, Akihiko Tatsumi
  • Publication number: 20170349979
    Abstract: The present invention pertains to an Al—Mg—Si-based aluminum alloy plate comprising, by mass, 0.20-1.50% of Mg, 0.30-2.00% of Si, and 0.005-0.500% of Sn, the balance being Al and unavoidable impurities, wherein the aluminum alloy plate is characterized in having a structure in which, from among all crystallized substances having a circle-equivalent diameter within the range of 0.3-20 ?m as measured using a 500×-magnification SEM, crystallized substances containing Sn identified by an X-ray spectrometer have an average number density in the range of 10 per mm2 to 2,000 per mm2, the proportion of the aforementioned average number density of the crystallized substances containing Sn in relation to the average number density of all crystallized substances having the circle-equivalent diameter being within the range of 0.3-20 ?m is 70% or above. With this aluminum alloy plate, it is possible to improve filiform corrosion resistance without inhibiting moldability or BH properties after room-temperature aging.
    Type: Application
    Filed: August 27, 2015
    Publication date: December 7, 2017
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takahiro OZAWA, Akihiko TATSUMI, Satoru TAKADA
  • Publication number: 20170349978
    Abstract: The present invention relates to an Al—Mg—Si sheet which contains, in terms of mass %, 0.3-1.0% Mg, 0.5-1.5% Si, 0.005-0.2% Sn, 0.02-1.0% Fe, and 0.02-0.6% Mn, with the remainder comprising Al and unavoidable impurities, characterized by having a structure wherein compounds that are detected with an SEM having a magnification of 500 diameters and are identified with an X-ray spectrometer include Sn compounds which contain Mn and Fe and which have an Sn content of 1.0 mass % or higher and a diameter of 0.3-20 ?m in terms of equivalent circular diameter, the average number density of the Sn compounds being 500-3,000 /mm2, and wherein the length of the boundary between each Sn compound and the aluminum matrix is in the range of 3-20/mm on average in terms of value obtained by dividing the total peripheral length of the Sn compound grain by the area thereof determined with the SEM.
    Type: Application
    Filed: August 27, 2015
    Publication date: December 7, 2017
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Hisao SHISHIDO, Katsushi MATSUMOTO, Yasuhiro ARUGA, Satoru TAKADA, Takahiro OZAWA, Akihiko TATSUMI
  • Publication number: 20170334171
    Abstract: An aluminum alloy material is provided. The aluminum alloy material has excellent bonding durability and is not susceptible to decrease in the bonding strength even if exposed to a high-temperature humid environment. A bonded body, a member for automobiles, and a method for producing the aluminum alloy material are also provided. In the method for producing the aluminum alloy material, the etching amount is controlled to be less than 700 nm when a first film composed of an oxide film is formed on the surface of an aluminum alloy base; and after the formation of the first film by a treatment using an aqueous solution containing a silicate salt, which is the final stage of the substantial film formation, a second film having a siloxane bond is formed by performing a silane coupling treatment.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 23, 2017
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Satoru TAKADA, Yusuke TAKAHASHI, Akihiko TATSUMI
  • Publication number: 20170275738
    Abstract: An Al—Mg—Si aluminum alloy material includes Sn. An oxide film formed on a surface of the aluminum alloy material is analyzed by a semi-quantitative analysis by X-ray photoelectron spectroscopy. A ratio of the number of Sn atoms to the number of Mg atoms in the oxide film is 0.001 to 3 on average. A ratio of the total number of atoms of Sn and Mg to the number of oxygen atoms is 0.001 to 0.2 on average.
    Type: Application
    Filed: August 27, 2015
    Publication date: September 28, 2017
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Takahiro OZAWA, Satoru TAKADA, Akihiko TATSUMI
  • Publication number: 20170175238
    Abstract: An aluminum alloy material, containing Al, Mg, Si and Sn, where an oxide coating is formed on a surface of the aluminum alloy material, and when the oxide coating formed on the surface of the aluminum alloy material is subjected to glow discharge emission spectroscopic analysis, as the maximum value of each content of Sn and Mg for a region from the surface of the oxide coating to a depth where oxygen amount becomes 15 at %, a Sn content is within a range of 0.01-10 at %, and a Mg content is 0 at % or more and less than 10 at %.
    Type: Application
    Filed: March 20, 2015
    Publication date: June 22, 2017
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Akihiko TATSUMI, Satoru TAKADA, Takahiro OZAWA
  • Patent number: 9669604
    Abstract: An aluminum-alloy plate (10) equipped with an aluminum-alloy substrate (1) and an aluminum-oxide film (2) formed on the surface of the aluminum-alloy substrate (1), wherein: the aluminum-oxide film (2) contains at least one type of additional element having a P-B ratio of 1.00 or more, zirconium in the amount of 0.01-10 atomic percent, and magnesium in the amount of 0.1 or more and less than 10 atomic percent; and the total amount of additional elements contained in the aluminum-oxide film (2) is 0.010-5.0 atomic percent. As a result, it is possible to provide: an aluminum-alloy plate which exhibits excellent post-degreasing-water-wettability stability even when in a high-temperature, high-humidity environment; and a joined body and a vehicle member which use the same.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: June 6, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Akihiko Tatsumi, Satoru Takada
  • Publication number: 20170066220
    Abstract: An aluminum alloy plate includes an aluminum-alloy substrate and a first film. The first film is formed on at least one surface of the aluminum-alloy substrate and includes an oxide film that contains Mg in an amount of 0.1 atomic % or more and less than 30 atomic % and Si in an amount of 5 atomic % or more and 40 atomic % or less and that has a Cu amount regulated to be less than 0.6 atomic % and an S amount regulated to be less than 5 atomic %.
    Type: Application
    Filed: February 19, 2015
    Publication date: March 9, 2017
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Akihiko TATSUMI, Satoru TAKADA
  • Publication number: 20160082702
    Abstract: An aluminum alloy substrate bears a first layer on at least one side thereof, and a second layer on at least part of the first layer. The first layer includes an oxide film containing Mg in a content of from 0.1 atomic percent to less than 30 atomic percent. The second layer contains siloxane bonds. The second layer is disposed in a mass of coating of from 0.1 mg/m2 to less than 30 mg/m2. Assume that parallel polarized light is applied to the side bearing the first layer and the second layer at an incident angle of 75°, and resulting data are analyzed by Fourier-transform infrared spectroscopy to give a spectrum. In the spectrum, a peak occurring adjacent to 1057 cm?1 has an area of 0.01 or more with respect to a base line drawn from 1026 cm?1 to 1084 cm?1.
    Type: Application
    Filed: May 21, 2014
    Publication date: March 24, 2016
    Applicant: KABUSHIKI KAISHA KOBE SHO (KOBE STEEL, LTD.)
    Inventors: Satoru TAKADA, Akihiko TATSUMI
  • Publication number: 20150231859
    Abstract: An aluminum-alloy plate (10) equipped with an aluminum-alloy substrate (1) and an aluminum-oxide film (2) formed on the surface of the aluminum-alloy substrate (1), wherein: the aluminum-oxide film (2) contains at least one type of additional element having a P-B ratio of 1.00 or more, zirconium in the amount of 0.01-10 atomic percent, and magnesium in the amount of 0.1 or more and less than 10 atomic percent; and the total amount of additional elements contained in the aluminum-oxide film (2) is 0.010-5.0 atomic percent. As a result, it is possible to provide: an aluminum-alloy plate which exhibits excellent post-degreasing-water-wettability stability even when in a high-temperature, high-humidity environment; and a joined body and a vehicle member which use the same.
    Type: Application
    Filed: September 5, 2013
    Publication date: August 20, 2015
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Akihiko Tatsumi, Satoru Takada
  • Patent number: 8668993
    Abstract: Disclosed is an aluminum alloy clad material which includes a core material; a sacrificial anode material on one surface of the core material; and a filler material on the other surface of the core material and composed of an Al—Si alloy, in which the core material contains 0.3 to 2.0 percent by mass of Mn, 0.15 to 1.6 percent by mass of Si, 0.1 to 1.0 percent by mass of Cu, and 0.1 to 1.0 percent by mass of Mg, with the remainder including Al and inevitable impurities, the sacrificial anode material contains 7.0 to 12.0 percent by mass of Zn, 0.3 to 1.8 percent by mass of Mn, and 0.3 to 1.2 percent by mass of Si, with the remainder including Al and inevitable impurities, and has a thickness of 10 to 30 ?m. The sacrificial anode material shows resistance to both local corrosion and general corrosion.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: March 11, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Akihiko Tatsumi, Shinji Sakashita, Satoshi Yoshida, Shimpei Kimura
  • Publication number: 20130319637
    Abstract: The titanium alloy material of the invention is excellent in a deposition inhibiting property of scales mainly comprising calcium carbonate contained in water and exhibits an excellent formability during manufacture of a heat exchanger or the like. The titanium alloy material of the invention contains P in an amount of 0.005 to 0.30% (mass % here and hereinafter) and Sn in an amount of 0.01 to 3.0%, with the balance of Ti and unavoidable impurities. Further, in a case where the titanium alloy material contains one or more elements selected from the group consisting of Cu, Fe, and Ni, they may satisfy the following formula (1): Cu+4.9Fe+1.3Ni+0.5Sn?1.6??(1) in which Cu, Fe, Ni and Sn each represent the content (mass %) of the respective elements in the titanium alloy in the formula (1).
    Type: Application
    Filed: May 30, 2013
    Publication date: December 5, 2013
    Inventors: Takashi KONNO, Akihiko Tatsumi, Kasumi Yanagisawa, Yoshio Itsumi, Hideto Oyama
  • Publication number: 20120286909
    Abstract: A method produces a dust core by molding a mixture through compression molding to give a powder compact, the mixture containing an oxygen-source-releasable compound and an iron-based soft magnetic powder for powder compacts including an iron-based soft magnetic matrix powder and an insulating coating film present on the surface of the matrix powder; and heating the powder compact to oxidize at least the surface of the iron-based soft magnetic matrix powder by the action of the oxygen-source-releasable compound. The resulting dust core excels not only in mechanical strength but also in resistivity (insulation).
    Type: Application
    Filed: March 30, 2012
    Publication date: November 15, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Takeshi OHWAKI, Hiroyuki Mitani, Hirofumi Hojo, Tomotsuna Kamijo, Akihiko Tatsumi, Wataru Urushihara, Mikako Takeda, Mamoru Hosokawa
  • Publication number: 20120168200
    Abstract: A process for producing a joint structure of a steel sheet and an aluminum sheet, in which the steel sheet and the aluminum sheet are joined to each other so as to be electrically connected to each other. The process is characterized by comprising a step of forming at least one resin coating film in a thickness of 0.1 to 5.0 ?m on a contact surface on the steel sheet side, wherein the resin is selected from the group consisting of a polyolefin resin, a polyurethane resin and an epoxy resin.
    Type: Application
    Filed: December 3, 2010
    Publication date: July 5, 2012
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Masatoshi Iwai, Shoji Hisano, Takeshi Ohwaki, Shinji Sakashita, Kasumi Yanagisawa, Akihiko Tatsumi
  • Publication number: 20110027610
    Abstract: Disclosed is an aluminum alloy clad material which includes a core material; a sacrificial anode material on one surface of the core material; and a filler material on the other surface of the core material and composed of an Al—Si alloy, in which the core material contains 0.3 to 2.0 percent by mass of Mn, 0.15 to 1.6 percent by mass of Si, 0.1 to 1.0 percent by mass of Cu, and 0.1 to 1.0 percent by mass of Mg, with the remainder including Al and inevitable impurities, the sacrificial anode material contains 7.0 to 12.0 percent by mass of Zn, 0.3 to 1.8 percent by mass of Mn, and 0.3 to 1.2 percent by mass of Si, with the remainder including Al and inevitable impurities, and has a thickness of 10 to 30 ?m. The sacrificial anode material shows resistance to both local corrosion and general corrosion.
    Type: Application
    Filed: July 15, 2010
    Publication date: February 3, 2011
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)
    Inventors: Akihiko Tatsumi, Shinji Sakashita, Satoshi Yoshida, Shimpei Kimura
  • Publication number: 20100261024
    Abstract: Disclosed is a surface-treated metal material which includes a metallic base including a steel or aluminum material; and an anti-corrosive layer present covering at least one surface of the metallic base. The anti-corrosive layer contains 0.001 to 1 g/m2 of one or more substances selected from the group consisting of benzoic acid salts, glutamic acid salts, anisidines, glycine, and quinolinols. The benzoic acid salts and/or glutamic acid salts are preferably chosen from potassium salt, sodium salt and ammonium salt. Also disclosed is a joined article of dissimilar materials including the surface-treated metal material as at least one of the materials. The surface-treated metal material includes, as the base metal, a steel or aluminum material and is thereby effectively and inexpensively protected from galvanic corrosion without performing electrical insulation or complete atmospheric isolation.
    Type: Application
    Filed: March 23, 2010
    Publication date: October 14, 2010
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Shinji Sakashita, Akihiko Tatsumi, Masatoshi Iwai, Shoji Hisano