Patents by Inventor Kouta YAMAUCHI

Kouta YAMAUCHI 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).

  • Spark plug
    Patent number: 9871352
    Abstract: The spark plug includes: an insulator having a through hole that penetrates therethrough along an axial direction; a center electrode disposed on one end side of the through hole; a metal terminal disposed on the other end side of the through hole; and a conductive seal layer connected to at least one of the center electrode and the metal terminal. The conductive seal layer contains glass and a Cu—Zn alloy. A volumetric percentage of the Cu—Zn alloy in the conductive seal layer is greater than or equal to 44% and not greater than 55%.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: January 16, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Seiji Nakano, Kouta Yamauchi, Hironori Uegaki
  • SPARK PLUG
    Publication number: 20170222405
    Abstract: The spark plug includes: an insulator having a through hole that penetrates therethrough along an axial direction; a center electrode disposed on one end side of the through hole; a metal terminal disposed on the other end side of the through hole; and a conductive seal layer connected to at least one of the center electrode and the metal terminal. The conductive seal layer contains glass and a Cu—Zn alloy. A volumetric percentage of the Cu—Zn alloy in the conductive seal layer is greater than or equal to 44% and not greater than 55%.
    Type: Application
    Filed: January 25, 2017
    Publication date: August 3, 2017
    Applicant: NGK Spark Plug Co., LTD.
    Inventors: Seiji NAKANO, Kouta YAMAUCHI, Hironori UEGAKI