Patents by Inventor Yu SAKURAI

Yu SAKURAI 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: 11053897
    Abstract: An air intake apparatus includes a plurality of funnel-shaped portions provided in a plurality of intake ports. The plurality of funnel-shaped portions respectively include open ends located at positions at which lengths of the plurality of intake ports are aligned with each other, the open ends being provided along a direction perpendicular to a direction in which respective centerlines of the plurality of intake ports extend.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: July 6, 2021
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Yu Sakurai
  • Publication number: 20210123398
    Abstract: An air intake apparatus includes a plurality of funnel-shaped portions provided in a plurality of intake ports. The plurality of funnel-shaped portions respectively include open ends located at positions at which lengths of the plurality of intake ports are aligned with each other, the open ends being provided along a direction perpendicular to a direction in which respective centerlines of the plurality of intake ports extend.
    Type: Application
    Filed: February 23, 2018
    Publication date: April 29, 2021
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Yu SAKURAI
  • Patent number: 10731607
    Abstract: In this air intake apparatus for an internal combustion engine, an external gas passage includes external gas introduction nozzles that introduce external gas into air intake pipes, and a length of each of the external gas introduction nozzles in a direction in which the external gas introduction nozzles extend is larger than an equivalent diameter of an exit of each of the external gas introduction nozzles.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: August 4, 2020
    Assignees: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yu Sakurai, Masaki Makihara
  • Patent number: 10612499
    Abstract: This air intake apparatus includes an air intake apparatus main body including a plurality of pieces bonded to each other along a split plane and an external gas passage formed inside the air intake apparatus main body by bonding the plurality of pieces to each other and including an external gas receiving port that directly receives external gas from a cylinder head and an external gas introduction port that introduces the external gas into a surge tank.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: April 7, 2020
    Assignees: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yu Sakurai, Naoki Tajima, Tomohisa Senda, Hideaki Teramoto, Masaki Makihara
  • Patent number: 10607757
    Abstract: The present invention is a method of producing a soft magnetic metal powder comprising, a material powder preparation step of preparing a material powder comprising a particle including a boron and a soft magnetic metal including an iron, a first nitriding step of nitriding the boron included in said particle by carrying out a heat treatment to said material powder under a non-oxidizing atmosphere including nitrogen, and a spheroidizing step of spheroidizing said particle by carrying out a heat treatment to said material powder of after said first nitriding step under a non-oxidizing atmosphere having lower nitrogen partial pressure than a nitrogen partial pressure of the non-oxidizing atmosphere during said first nitriding step. According to the present invention, the soft magnetic metal powder comprising the particle having a shape of a complete sphere or close to complete sphere, and comprising the small standard deviation of the particle size distribution of the powder can be obtained.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: March 31, 2020
    Assignee: TDK CORPORATION
    Inventors: Yu Sakurai, Tomofumi Kuroda, Hideyuki Itoh
  • Publication number: 20190148044
    Abstract: A method for producing soft magnetic metal powder includes: a raw material powder preparing step of preparing metal raw material powder having metal raw material particles including iron, silicon, and boron; a mixture step of mixing the metal raw material powder and a carbon source substance and obtaining mixed powder; and a heat treatment step of performing heat treatment on the mixed powder in a non-oxidizing atmosphere containing nitrogen at a heat treatment temperature of 1,250° C. or higher and making the metal raw material particles spherical.
    Type: Application
    Filed: November 13, 2018
    Publication date: May 16, 2019
    Applicant: TDK CORPORATION
    Inventors: Tomofumi KURODA, Yu SAKURAI, Tomohisa MITOSE
  • Publication number: 20180372039
    Abstract: This air intake apparatus includes an air intake apparatus main body including a plurality of pieces bonded to each other along a split plane and an external gas passage formed inside the air intake apparatus main body by bonding the plurality of pieces to each other and including an external gas receiving port that directly receives external gas from a cylinder head and an external gas introduction port that introduces the external gas into a surge tank.
    Type: Application
    Filed: November 1, 2016
    Publication date: December 27, 2018
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yu SAKURAI, Naoki TAJIMA, Tomohisa SENDA, Hideaki TERAMOTO, Masaki MAKIHARA
  • Publication number: 20180347520
    Abstract: In this air intake apparatus for an internal combustion engine, an external gas passage includes external gas introduction nozzles that introduce external gas into air intake pipes, and a length of each of the external gas introduction nozzles in a direction in which the external gas introduction nozzles extend is larger than an equivalent diameter of an exit of each of the external gas introduction nozzles.
    Type: Application
    Filed: November 8, 2016
    Publication date: December 6, 2018
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yu SAKURAI, Masaki MAKIHARA
  • Patent number: 9959968
    Abstract: A reactor uses a composite magnetic core which combines a ferrite core and a soft magnetic metal core. The reactor is composed of a pair of yoke portion cores composed of ferrite cores, winding portion core(s) disposed between the opposite planes of the yoke portion cores, and coil(s) wound around the winding portion core(s). Flange-like members are disposed at the end part of the winding portion core(s) in a way of being external connected with the periphery of winding portion core(s) which is composed of a soft magnetic metal core. The flange-like member is composed of a metal material with iron as the main component which can be magnetically attracted to a magnet, and a junction portion of the flange-like member and the yoke portion core is formed at one flat plane of the member which is the same plane with an end plane of the winding portion core.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: May 1, 2018
    Assignee: TDK CORPORATION
    Inventors: Tomofumi Kuroda, Yu Sakurai
  • Patent number: 9881721
    Abstract: The present invention relates to a soft magnetic metal powder having iron as the main component and containing boron, wherein, the content of iron inside the soft magnetic metal powder is 98 mass % or more, the content of boron in the particle of the soft magnetic metal powder is 10 to 150 ppm, and the metal particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: January 30, 2018
    Assignee: TDK CORPORATION
    Inventors: Yu Sakurai, Tomofumi Kuroda, Hideyuki Itoh
  • Patent number: 9793035
    Abstract: The present invention relates to a soft magnetic metal powder which has Fe as the main component and contains Si and B, wherein, the content of Si in the soft magnetic metal powder is 1 to 15 mass %, the content of boron inside the metal particle of the soft magnetic metal powder is 10 to 150 ppm, and the particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: October 17, 2017
    Assignee: TDK CORPORATION
    Inventors: Yu Sakurai, Tomofumi Kuroda, Hideyuki Itoh
  • Patent number: 9779861
    Abstract: The present invention relates to a soft magnetic metal powder which contains B and has Fe and Ni as the main components, wherein the content of Ni in the soft magnetic metal powder is 30 to 80 mass %, the total content of Fe and Ni in the soft magnetic metal powder is 90 mass % or more, the content of B inside the metal particle of the soft magnetic metal powder is 10 to 150 ppm, and the particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: October 3, 2017
    Assignee: TDK CORPORATION
    Inventors: Yu Sakurai, Tomofumi Kuroda, Hideyuki Itoh
  • Patent number: 9601249
    Abstract: The objective is to provide a soft magnetic metal powder-compact magnetic core and a reactor with an excellent DC superposition characteristic. The soft magnetic metal powder-compact magnetic core contains a soft magnetic metal powder, boron nitride and a silicon compound, when its section is ground and then observed, the ratio of the area occupied by the soft magnetic metal powder to that of the section of the soft magnetic metal powder-compact magnetic core is 90% or more and 95% or less, and a roundness of the section of 80% or more of the particles constituting the soft magnetic metal powder is 0.75 or more and 1.0 or less, and boron nitride exists in 70% or more of the voids-among-multiple-particles among the voids-among-multiple-particles in the section of the soft magnetic metal powder-compact magnetic core. Thus, the soft magnetic metal powder-compact magnetic core with an excellent DC superposition characteristic can be obtained.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: March 21, 2017
    Assignee: TDK CORPORATION
    Inventors: Yusuke Taniguchi, Tomofumi Kuroda, Yu Sakurai
  • Patent number: 9534571
    Abstract: An intake device includes: a plurality of intake ports which are adjacent to each other with a partition wall interposed therebetween; a valve body provided for each of the plurality of intake ports; a rotating shaft which rotates along with the valve body; and a bearing member which is disposed between the intake ports adjacent to each other and rotatably supports the rotating shaft of the valve body, wherein the bearing member includes a bearing main body having a bearing hole which rotatably supports the rotating shaft, and an arm portion which extends in a length larger than an inner diameter of the bearing hole from the bearing main body along the partition wall between the intake ports adjacent to each other and configures a bearing-side welding portion.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: January 3, 2017
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Toshiyuki Oiwa, Yu Sakurai
  • Patent number: 9455080
    Abstract: A reactor using a composite magnetic core in which a ferrite core and a soft magnetic metal core are combined. The reactor is composed of a pair of yoke portion magnetic portions composed of ferrite, winding portion core(s) disposed between the opposite planes of the yoke portion cores, and coil(s) winding around the winding portion core(s). The winding portion core(s) is/are formed using a soft magnetic metal core with a substantially constant cross sectional area. Junction portion cores composed of soft magnetic metal powder cores with a tabular shape are disposed at the spaces where the winding portion core(s) face(s) the yoke portion cores, and the area of the part where the junction portion core faces the yoke portion core is made to be 1.3 to 4.0 times that of the section of the winding portion core.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: September 27, 2016
    Assignee: TDK CORPORATION
    Inventors: Tomofumi Kuroda, Yu Sakurai, Hideyuki Itoh
  • Publication number: 20160225503
    Abstract: The objective is to provide a soft magnetic metal powder-compact magnetic core and a reactor with an excellent DC superposition characteristic. The soft magnetic metal powder-compact magnetic core contains a soft magnetic metal powder, boron nitride and a silicon compound, when its section is ground and then observed, the ratio of the area occupied by the soft magnetic metal powder to that of the section of the soft magnetic metal powder-compact magnetic core is 90% or more and 95% or less, and a roundness of the section of 80% or more of the particles constituting the soft magnetic metal powder is 0.75 or more and 1.0 or less, and boron nitride exists in 70% or more of the voids-among-multiple-particles among the voids-among-multiple-particles in the section of the soft magnetic metal powder-compact magnetic core. Thus, the soft magnetic metal powder-compact magnetic core with an excellent DC superposition characteristic can be obtained.
    Type: Application
    Filed: January 28, 2016
    Publication date: August 4, 2016
    Applicant: TDK CORPORATION
    Inventors: Yusuke TANIGUCHI, Tomofumi KURODA, Yu SAKURAI
  • Patent number: 9406430
    Abstract: A reactor using a composite magnetic core in which a ferrite core and a soft magnetic metal core are combined. The reactor is composed of a pair of yoke portion magnetic portions composed of a ferrite core, winding portion core(s) disposed between the opposite planes of the yoke portion cores, and coil(s) wound around the winding portion core(s). The winding portion core(s) is/are made of a soft magnetic metal core, and the cross sectional area of the part for winding the coil of the winding portion core is substantially constant. When the cross sectional area of the part for winding the coil of the winding portion core is set as S1, and the area of the parts opposite to the yoke portion cores in the winding portion core(s) is set as S2, the area ratio S2/S1 is set to be 1.3 to 4.0.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: August 2, 2016
    Assignee: TDK CORPORATION
    Inventors: Tomofumi Kuroda, Yu Sakurai, Hideyuki Itoh
  • Publication number: 20150332821
    Abstract: The present invention relates to a soft magnetic metal powder which contains B and has Fe and Ni as the main components, wherein the content of Ni in the soft magnetic metal powder is 30 to 80 mass %, the total content of Fe and Ni in the soft magnetic metal powder is 90 mass % or more, the content of B inside the metal particle of the soft magnetic metal powder is 10 to 150 ppm, and the particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Yu SAKURAI, Tomofumi KURODA, Hideyuki ITOH
  • Publication number: 20150332823
    Abstract: The present invention relates to a soft magnetic metal powder having iron as the main component and containing boron, wherein, the content of iron inside the soft magnetic metal powder is 98 mass % or more, the content of boron in the particle of the soft magnetic metal powder is 10 to 150 ppm, and the metal particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Yu SAKURAI, Tomofumi KURODA, Hideyuki ITOH
  • Publication number: 20150332824
    Abstract: The present invention relates to a soft magnetic metal powder which has Fe as the main component and contains Si and B, wherein, the content of Si in the soft magnetic metal powder is 1 to 15 mass %, the content of boron inside the metal particle of the soft magnetic metal powder is 10 to 150 ppm, and the particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Yu SAKURAI, Tomofumi KURODA, Hideyuki ITOH