Patents by Inventor Takayuki TUJI

Takayuki TUJI 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).

  • Copper alloy wire, cable, and method of manufacturing copper alloy wire
    Patent number: 11545277
    Abstract: Bendability of a copper alloy wire is improved without decrease in an electrical conductivity of the copper alloy wire made of copper alloy containing zirconium. A cable includes: a two-core stranded wire formed by intertwining two electrical wires made of a conductor and an insulating layer covering the conductor; a filler formed around the two-core stranded wire; and a sheath formed around the filler and the electrical wire. The conductor is a copper alloy wire in which a precipitate containing the zirconium disperses, and has a crystal gain diameter that is equal to or smaller than 1 ?m, an electrical conductivity that is equal to or higher than 87% IACS, and a tensile stress that is equal to or larger than 545 MPa.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: January 3, 2023
    Assignee: Hitachi Metals, Ltd.
    Inventors: Kazuhisa Takahashi, Shohei Hata, Hiromitsu Kuroda, Toru Sumi, Kazuya Nishi, Keisuke Fujito, Takayuki Tuji
  • Insulated electric wire, coil and producing method for same coil
    Patent number: 11476024
    Abstract: An insulated electric wire is composed of a conductor composed of a copper material, and an electrical insulating layer provided on an outer periphery of the conductor. For the constituent conductor of the insulated electric wire, in an orientation intensity ratio obtained by X-ray diffraction of a transverse cross section of the conductor, an intensity in a [200] crystal orientation is higher than an intensity in a [111] crystal orientation.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: October 18, 2022
    Assignee: Hitachi Metals, Ltd.
    Inventors: Keisuke Fujito, Shohei Hata, Hiromitsu Kuroda, Takayuki Tuji
  • INSULATED ELECTRIC WIRE, COIL AND PRODUCING METHOD FOR SAME COIL
    Publication number: 20200373049
    Abstract: An insulated electric wire is composed of a conductor composed of a copper material, and an electrical insulating layer provided on an outer periphery of the conductor. For the constituent conductor of the insulated electric wire, in an orientation intensity ratio obtained by X-ray diffraction of a transverse cross section of the conductor, an intensity in a [200] crystal orientation is higher than an intensity in a [111] crystal orientation.
    Type: Application
    Filed: May 14, 2020
    Publication date: November 26, 2020
    Applicant: Hitachi Metals, Ltd.
    Inventors: Keisuke FUJITO, Shohei HATA, Hiromitsu KURODA, Takayuki TUJI
  • Copper Alloy Wire, Cable, and Method of Manufacturing Copper Alloy Wire
    Publication number: 20200075193
    Abstract: Bendability of a copper alloy wire is improved without decrease in an electrical conductivity of the copper alloy wire made of copper alloy containing zirconium. A cable includes: a two-core stranded wire formed by intertwining two electrical wires made of a conductor and an insulating layer covering the conductor; a filler formed around the two-core stranded wire; and a sheath formed around the filler and the electrical wire. The conductor is a copper alloy wire in which a precipitate containing the zirconium disperses, and has a crystal gain diameter that is equal to or smaller than 1 ?m, an electrical conductivity that is equal to or higher than 87% IACS, and a tensile stress that is equal to or larger than 545 MPa.
    Type: Application
    Filed: August 12, 2019
    Publication date: March 5, 2020
    Inventors: Kazuhisa TAKAHASHI, Shohei HATA, Hiromitsu KURODA, Toru SUMI, Kazuya NISHI, Keisuke FUJITO, Takayuki TUJI