Patents by Inventor Takahiko Iriyama

Takahiko Iriyama 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).

  • Isotropic powdery magnet material, process for preparing and resin-bonded magnet
    Patent number: 7481895
    Abstract: Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets. The magnet powder is prepared by melt-spinning of a molten alloy and nitriding the alloy powder thus obtained to form a magnet alloy having an alloy composition of one of the formulae, by atomic %: SmxFe100-x-vNv, SmxFe100-x-y-vM1yNv and SmxFe100-x-z-vM2zNv wherein M1 is at least one member selected from the group consisting of Hf and Zr; and M2 is at least one member selected from the group consisting of Si, Nb, Ti, Ga, Al, Ta and C; 7?x?12, 0.1?y?1.5, 0.1?z?1.0 and 0.5?v?20; the crystal structure is TbCu7 type; and the thickness of the flakes is 10-40 ?m.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: January 27, 2009
    Assignee: Daido Steel Co., Ltd.
    Inventors: Takahiko Iriyama, Ryo Omatsuzawa, Takayuki Nishio
  • Isotropic powdery magnet material, process for preparing and resin-bonded magnet
    Publication number: 20040144450
    Abstract: Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets.
    Type: Application
    Filed: January 20, 2004
    Publication date: July 29, 2004
    Inventors: Takahiko Iriyama, Ryo Omatsuzawa, Takayuki Nishio
  • Isotropic powdery magnet material, process for preparing and resin-boned magnet
    Patent number: 6758918
    Abstract: Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets. The magnet powder is prepared by melt-spinning of a molten alloy and nitriding the alloy powder thus obtained to form a magnet alloy having an alloy composition of one of the formulae, by atomic %: SmxFe100-x-vNv, SmxFe100-x-y-vM1yNv and SmxFe100-x-z-vM2zNv wherein M1 is at least one member selected from the group consisting of Hf and Zr; and M2 is at least one member selected from the group consisting of Si, Nb, Ti, Ga, Al, Ta and C; 7≦x≦12, 0.1≦y≦1.5, 0.1≦z≦1.0 and 0.5≦v≦20; the crystal structure is TbCu7 type; and the thickness of the flakes is 10-40 &mgr;m.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: July 6, 2004
    Assignee: Diado Steel Co., Ltd.
    Inventors: Takahiko Iriyama, Ryo Omatsuzawa, Takayuki Nishio
  • Anisotropic magnet and process of producing the same
    Patent number: 6605162
    Abstract: This invention relates to an anisotropic magnet having excellent magnetic characteristics such as a high magnetic flux density, a process for producing the same, and a motor having the same.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: August 12, 2003
    Assignees: Nissan Motor Co., Ltd., Daido Tokushuko Kabushiki Kaisha
    Inventors: Hideaki Ono, Munekatsu Shimada, Norihisa Waki, Akira Fujiki, Takahiko Iriyama
  • Anisotropic magnet and process of producing the same
    Publication number: 20020043302
    Abstract: This invention relates to an anisotropic magnet having excellent magnetic characteristics such as a high magnetic flux density, a process for producing the same, and a motor having the same.
    Type: Application
    Filed: August 10, 2001
    Publication date: April 18, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hideaki Ono, Munekatsu Shimada, Norihisa Waki, Akira Fujiki, Takahiko Iriyama
  • Isotropic powdery magnet material, process for preparing and resin-boned magnet
    Publication number: 20020014283
    Abstract: Disclosed is an isotropic SmFeN powdery magnet material for producing resin-bonded magnets.
    Type: Application
    Filed: May 29, 2001
    Publication date: February 7, 2002
    Inventors: Takahiko Iriyama, Ryo Omatsuzawa, Takayuki Nishio
  • Magnetic materials containing rare earth element iron nitrogen and hydrogen
    Patent number: 5186766
    Abstract: Magentic materials represented by the formulaR.sub.60 Fe.sub.(100-.alpha.-.beta.-.gamma.) N.sub..beta. H.sub..gamma.(I)orR.sub..alpha. Fe.sub.(100-.alpha.-.beta.-.gamma.-.delta.) N.sub..beta. H.sub..gamma. M.sub..delta. (II)whereinR is at least one rare earth element inclusive of Y,M is at least one additive selected from the group consisting of Sn, Ga, In, Bi, Pb, Zn, Al, Zr, Cu, Mo, Ti, Si, MgO, Al.sub.2 O.sub.3, Sm.sub.2 O.sub.3, AlF.sub.3, ZnF.sub.2, SiC, TiC, AlN and Si.sub.3 N.sub.2,.alpha. is 5 to 20 atomic percent,.beta. is 5 to 30 atomic percent,.gamma. is 0.01 to 10 atomic percent and.delta.is 0.1 to 40 atomic percent,sintered magnets and bonded magnets obtained from the magnetic materials.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: February 16, 1993
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Takahiko Iriyama, Kurima Kobayashi, Hideaki Imai
  • Magnetic material containing rare earth element, iron, nitrogen, hydrogen and oxygen and bonded magnet containing the same
    Patent number: 5164104
    Abstract: A magnetic material represented by the formulaR.sub..alpha. Fe.sub.(100-.alpha.-.beta.-.gamma.-.delta.) N.sub..beta. H.sub..gamma. O.sub..delta.whereinR is at least one rare earth element inclusive of Y;.alpha. is from 5 to 20 atomic percent,.beta. is from 5 to 25 atomic percent,.gamma. is from 0.01 to 5 atomic percent and.delta. is from 3 to 15 atomic percent.From this magnetic material, a bonded magnet can advantageously be obtained, while maintaining excellent magnetic properties of the magnetic material used for the production thereof.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: November 17, 1992
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kurima Kobayashi, Takahiko Iriyama, Nobuyoshi Imaoka, Akinobu Sudo, Naoko Kashiwaya