Patents by Inventor Kurima Kobayashi

Kurima Kobayashi 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: 10937577
    Abstract: A magnetic compound represented by the formula (R1(1-x)R2x)a(Fe(1-y)Coy)bTcMd wherein R1 is one or more elements selected from the group consisting of Sm, Pm, Er, Tm and Yb, R2 is one or more elements selected from the group consisting of Zr, La, Ce, Pr, Nd, Eu, Gd, Tb, Dy, Ho and Lu, T is one or more elements selected from the group consisting of Ti, V, Mo, Si and W, M is one or more elements selected from the group consisting of unavoidable impurity elements, Al, Cr, Cu, Ga, Ag and Au, 0?x?0.7, 0?y?0.7, 4?a?20, b=100-a-c-d, 0<c<7.7, and 0?d?3, the magnetic compound having a ThMn12-type crystal structure, wherein the volume fraction of ?-(Fe, Co) phase is less than 12.3%.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: March 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Masao Yano, Akira Kato, Akira Manabe, Shunji Suzuki, Kurima Kobayashi
  • Patent number: 10351935
    Abstract: Provided is a magnetic compound represented by the formula (R(1-x)Zrx)a(Fe(1-y)Coy)bTcMdAe (wherein R represents one or more rare earth elements, T represents one or more elements selected from the group consisting of Ti, V, Mo, and W, M represents one or more elements selected from the group consisting of unavoidable impurity elements, Al, Cr, Cu, Ga, Ag, and Au, A represents one or more elements selected from the group consisting of N, C, H, and P, 0?x?0.5, 0?y?0.6, 4?a?20, b=100?a?c?d, 0<c<7, 0?d?1, and 1?e?18), in which a main phase of the magnetic compound includes a ThMn12 type crystal structure, and a volume percentage of an ?-(Fe,Co) phase is 20% or lower.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: July 16, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Akira Kato, Kota Washio, Hidefumi Kishimoto, Masao Yano, Akira Manabe, Masaaki Ito, Shunji Suzuki, Kurima Kobayashi
  • Patent number: 10325704
    Abstract: A rare earth magnet having a main phase and a sub-phase, wherein the main phase has a ThMn12-type crystal structure; the sub-phase contains at least any one of an Sm5Fe17-based phase, an SmCo5-based phase, an Sm2O3-based phase, and an Sm7Cu3-based phase; assuming that the volume of the rare earth magnet is 100%, the volume fraction of the sub-phase is from 2.3 to 9.5% and the volume fraction of an ?-Fe phase is 9.0% or less; and the density of the rare earth magnet is 7.0 g/cm3 or more.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: June 18, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Akira Kato, Masao Yano, Shunji Suzuki, Kurima Kobayashi
  • Publication number: 20170178772
    Abstract: A rare earth magnet having a main phase and a sub-phase, wherein the main phase has a ThMn12-type crystal structure; the sub-phase contains at least any one of an Sm5Fe17-based phase, an SmCo5-based phase, an Sm2O3-based phase, and an Sm7Cu3-based phase; assuming that the volume of the rare earth magnet is 100%, the volume fraction of the sub-phase is from 2.3 to 9.5% and the volume fraction of an ?-Fe phase is 9.0% or less; and the density of the rare earth magnet is 7.0 g/cm3 or more.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 22, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu SAKUMA, Akira KATO, Masao YANO, Shunji SUZUKI, Kurima KOBAYASHI
  • Publication number: 20170084370
    Abstract: A magnetic compound represented by the formula (R1(1-x)R2x)a(Fe(1-y)Coy)bTcMd wherein R1 is one or more elements selected from the group consisting of Sm, Pm, Er, Tm and Yb, R2 is one or more elements selected from the group consisting of Zr, La, Ce, Pr, Nd, Eu, Gd, Tb, Dy, Ho and Lu, T is one or more elements selected from the group consisting of Ti, V, Mo, Si and W, M is one or more elements selected from the group consisting of unavoidable impurity elements, Al, Cr, Cu, Ga, Ag and Au, 0?x?0.7, 0?y?0.7, 4?a?20, b=100-a-c-d, 0<c<7.7, and 0?d?3, the magnetic compound having a ThMn12-type crystal structure, wherein the volume fraction of ?-(Fe, Co) phase is less than 12.3%.
    Type: Application
    Filed: August 10, 2016
    Publication date: March 23, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu SAKUMA, Masao YANO, Akira KATO, Akira MANABE, Shunji SUZUKI, Kurima KOBAYASHI
  • Publication number: 20160071635
    Abstract: Provided is a magnetic compound represented by the formula (R(1-x)Zrx)a(Fe(1-y)Coy)bTcMdAe (wherein R represents one or more rare earth elements, T represents one or more elements selected from the group consisting of Ti, V, Mo, and W, M represents one or more elements selected from the group consisting of unavoidable impurity elements, Al, Cr, Cu, Ga, Ag, and Au, A represents one or more elements selected from the group consisting of N, C, H, and P, 0?x?0.5, 0?y?0.6, 4?a?20, b=100?a?c?d, 0<c<7, 0?d?1, and 1?e?18), in which a main phase of the magnetic compound includes a ThMn12 type crystal structure, and a volume percentage of an ?-(Fe,Co) phase is 20% or lower.
    Type: Application
    Filed: September 3, 2015
    Publication date: March 10, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu SAKUMA, Akira KATO, Kota WASHIO, Hidefumi KISHIMOTO, Masao YANO, Akira MANABE, Masaaki ITO, Shunji SUZUKI, Kurima KOBAYASHI
  • 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
  • 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