Patents by Inventor Yoshikazu Takaku

Yoshikazu Takaku 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: 9617622
    Abstract: A hydrogen gas generating member includes a metal alloy having dispersed aluminum. The metal alloy includes an Al—X alloy, where X is Sn: 10.1 to 99.5% by mass, Bi: 30.1 to 99.5% by mass, In: 10.1 to 99.5% by mass, Sn +Bi: 20.1 to 99.5% by mass, Sn +In: to 10 to 99.5% by mass, Bi+In: 20.1 to 99.5% by mass, or Sn+Bi+In: 20 to 99.5% by mass. Hydrogen gas is generated by bringing the hydrogen gas generating member into contact with water.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: April 11, 2017
    Assignee: Japan Science and Technology Agency
    Inventors: Kiyohito Ishida, Ryosuke Kainuma, Ikuo Ohnuma, Toshihiro Omori, Yoshikazu Takaku, Takehito Hagisawa
  • Patent number: 9605334
    Abstract: The present invention is a heat-resistant material comprising a Rh-based alloy, wherein the Rh-based alloy is a high heat-resistant and high strength alloy comprising a Rh-based alloy where Al and W as essential additive elements are added to Rh (0.2 to 15.0 mass % of Al, 15.0 to 45.0 mass % of W and Rh as the remainder), and a ?? phase (Rh3 (Al, W)) having an L12 structure is dispersed as a strengthening phase in a matrix. The Rh-based alloy of the present invention can be further improved in workability and high temperature oxidation characteristics by optionally adding B, C, Mg, Ca, Y, La or misch metals, Ni, Co, Cr, Fe, Mo, Ti, Nb, Ta, V, Zr, Hf, Ir, Re, Pd, Pt or Ru as an additive element. The Rh-based alloy of the present invention is a heat-resistant material having excellent high-temperature-resistant characteristics and a good balance of factors such as weight.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: March 28, 2017
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Kiyohito Ishida, Yoshikazu Takaku, Toshihiro Omori
  • Publication number: 20140345758
    Abstract: The present invention is a heat-resistant material comprising a Rh-based alloy, wherein the Rh-based alloy is a high heat-resistant and high strength alloy comprising a Rh-based alloy where Al and W as essential additive elements are added to Rh (0.2 to 15.0 mass % of Al, 15.0 to 45.0 mass % of W and Rh as the remainder), and a ?? phase (Rh3 (Al, W)) having an L12 structure is dispersed as a strengthening phase in a matrix. The Rh-based alloy of the present invention can be further improved in workability and high temperature oxidation characteristics by optionally adding B, C, Mg, Ca, Y, La or misch metals, Ni, Co, Cr, Fe, Mo, Ti, Nb, Ta, V, Zr, Hf, Ir, Re, Pd, Pt or Ru as an additive element. The Rh-based alloy of the present invention is a heat-resistant material having excellent high-temperature-resistant characteristics and a good balance of factors such as weight.
    Type: Application
    Filed: April 16, 2012
    Publication date: November 27, 2014
    Inventors: Kiyohito Ishida, Yoshikazu Takaku, Toshihiro Omori
  • Patent number: 8283783
    Abstract: A zinc based solder material 55 of the present invention is prepared by providing on the surface of a zinc based material 50, from which an oxide film 501 has been removed or at which an oxide film 501 does not exist, with a coating layer 51 containing primarily a metal whose oxide is more easily reducible than the oxide film 501. In a joined body and a power semiconductor module of the present invention, the zinc based solder material 55 is used in the joining portion, and after joining, the coating layer 51 does not exist.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: October 9, 2012
    Assignees: Toyota Jidosha Kabushiki Kaisha, Tohoku University
    Inventors: Yasushi Yamada, Yuji Yagi, Yoshikazu Takaku, Ikuo Ohnuma, Kiyohito Ishida, Takashi Atsumi, Ikuo Nakagawa, Mikio Shirai
  • Publication number: 20120107228
    Abstract: There is provided a hydrogen gas generating member which safely facilitates the hydrogen gas generation reaction by bringing an Al alloy which is subjected to rolling treatment or powdering treatment into contact with water. A hydrogen gas generating member 20 includes a texture in which Al is finely dispersed in a metal matrix, where hydrogen gas is generated by bringing the hydrogen gas generating member into contact with water. A fixing member 14 for mounting the hydrogen gas generating member 20 is provided in a hydrogen generating apparatus 10 and is brought into contact with a water 15 that is stored inside. The hydrogen gas generated from the surface is supplied outside through a hydrogen gas collecting, pipe 12 and stored in a storage tank (not shown).
    Type: Application
    Filed: August 11, 2008
    Publication date: May 3, 2012
    Applicant: Japan Science and Technology Agency
    Inventors: Kiyohito Ishida, Ryosuke Kainuma, Ikuo Ohnuma, Toshihiro Omori, Yoshikazu Takaku, Takehito Hagisawa
  • Publication number: 20100193801
    Abstract: A zinc based solder material 55 of the present invention is prepared by providing on the surface of a zinc based material 50, from which an oxide film 501 has been removed or at which an oxide film 501 does not exist, with a coating layer 51 containing primarily a metal whose oxide is more easily reducible than the oxide film 501. In a joined body and a power semiconductor module of the present invention, the zinc based solder material 55 is used in the joining portion, and after joining, the coating layer 51 does not exist.
    Type: Application
    Filed: November 19, 2008
    Publication date: August 5, 2010
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOHOKU UNIVERSITY
    Inventors: Yasushi Yamada, Yuji Yagi, Yoshikazu Takaku, Ikuo Ohnuma, Kiyohito Ishida, Takashi Atsumi, Ikuo Nakagawa, Mikio Shirai
  • Publication number: 20100109016
    Abstract: Provided is a power semiconductor module in which two components are bonded by a Bi based solder material. A Cu layer is provided on the surfaces thereof to be bonded by the Bi based solder material on the two-component. Two components, i.e., the components to be bonded, are a combination of a semiconductor element and an insulating part, or a combination of an insulating part and a radiator plate. The insulating part is composed of a Cu/SiNx/Cu laminated body.
    Type: Application
    Filed: April 17, 2008
    Publication date: May 6, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yuji Yagi, Yasushi Yamada, Ikuo Nakagawa, Takashi Atsumi, Mikio Shirai, Ikuo Ohnuma, Kiyohito Ishida, Yoshikazu Takaku
  • Publication number: 20060210790
    Abstract: A thermoelectric module comprises a plurality of thermoelectric elements which are arranged between a pair of substrates having electrode patterns and which are bonded with the electrode patterns via solder in which at least one dispersion phase is dispersed into a matrix phase, wherein the melting temperature of the dispersion phase is higher than that of the matrix phase (i.e., 240° C. or over), and the dispersion phase comprises fine particles whose average diameter is 5 ?m or less. The solder is constituted by an alloy so as to realize a volume ratio of 40% or less, wherein it is composed of a Bi—Cu—X alloy or a Bi—Zn—X alloy (where ‘X’ represents at least one element selected in advance). Preferably, the solder is constituted by powder containing fine particles whose average diameter is 100 ?m or less or thin plates whose average thickness is 500 ?m or less.
    Type: Application
    Filed: November 24, 2004
    Publication date: September 21, 2006
    Inventors: Yuma Horio, Takahiro Hayashi, Kenzaburo Iijima, Junya Suzuki, Masayoshi Sekine, Kiyohito Ishida, Ryosuke Kainuma, Ikuo Ohnuma, Yoshikazu Takaku, Cui Wang