Patents by Inventor Hirokazu FURUI

Hirokazu FURUI 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).

  • Insulation spacer and gas insulation shutoff apparatus using the insulation spacer
    Patent number: 11070039
    Abstract: An insulating spacer and a gas insulation shutoff apparatus each having a high dielectric strength against adhesion of a metal foreign substance are provided without increasing size or complicating a shape of the insulating spacer. In an insulating spacer of a gas insulation shutoff apparatus including a grounded tank filled with an insulating gas, a high-voltage conductor provided within the grounded tank, and the insulating spacer supporting and fixing the high-voltage conductor within the grounded tank, the insulating spacer includes a conductor to be connected to the high-voltage conductor, an insulating structure supporting and fixing the conductor within the grounded tank, and a nonlinear resistance layer provided on a creepage surface of the insulating structure, and the nonlinear resistance layer is provided in a portion to be a high-field portion of the creepage surface of the insulating structure.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 20, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Hirokazu Furui, Jun Nukaga, Makoto Hirose
  • Insulation Spacer and Gas Insulation Shutoff Apparatus Using the Insulation Spacer
    Publication number: 20200083678
    Abstract: An insulating spacer and a gas insulation shutoff apparatus each having a high dielectric strength against adhesion of a metal foreign substance are provided without increasing size or complicating a shape of the insulating spacer. In an insulating spacer of a gas insulation shutoff apparatus including a grounded tank filled with an insulating gas, a high-voltage conductor provided within the grounded tank, and the insulating spacer supporting and fixing the high-voltage conductor within the grounded tank, the insulating spacer includes a conductor to be connected to the high-voltage conductor, an insulating structure supporting and fixing the conductor within the grounded tank, and a nonlinear resistance layer provided on a creepage surface of the insulating structure, and the nonlinear resistance layer is provided in a portion to be a high-field portion of the creepage surface of the insulating structure.
    Type: Application
    Filed: May 14, 2018
    Publication date: March 12, 2020
    Inventors: Hirokazu FURUI, Jun NUKAGA, Makoto HIROSE