Patents by Inventor Shou NAKAMA

Shou NAKAMA 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).

  • Method for inspecting insulator for spark plug
    Patent number: 10120015
    Abstract: A method for inspecting an insulator for a spark plug to determine whether or not the insulator has a defect, the spark plug extending in an axial direction, includes a voltage applying step of applying a voltage between a first electrode disposed in an axial hole in the insulator and a second electrode disposed near an outer peripheral surface of the insulator. The voltage applying step is performed while a gap between a front end of the first electrode and an inner peripheral surface of the insulator that faces the front end of the first electrode in a radial direction is filled with a first insulating material without leaving a hollow space.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: November 6, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kazumichi Hirose, Yoshiaki Hashiguchi, Shou Nakama
  • METHOD FOR INSPECTING INSULATOR FOR SPARK PLUG
    Publication number: 20160223604
    Abstract: A method for inspecting an insulator for a spark plug to determine whether or not the insulator has a defect, the spark plug extending in an axial direction, includes a voltage applying step of applying a voltage between a first electrode disposed in an axial hole in the insulator and a second electrode disposed near an outer peripheral surface of the insulator. The voltage applying step is performed while a gap between a front end of the first electrode and an inner peripheral surface of the insulator that faces the front end of the first electrode in a radial direction is filled with a first insulating material without leaving a hollow space.
    Type: Application
    Filed: January 28, 2016
    Publication date: August 4, 2016
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kazumichi HIROSE, Yoshiaki HASHIGUCHI, Shou NAKAMA