Patents by Inventor Ryuji NAGAE

Ryuji NAGAE 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 insulator containing mullite and spark plug including same
    Patent number: 9912126
    Abstract: An insulator is rendered less breakable. A spark plug insulator is a tube-shaped spark plug insulator having a through hole extending in a direction of an axial line. The spark plug insulator contains alumina as a main component and mullite at at least part of the insulator. Mullite is contained in only an inner circumferential surface of the tube-shaped spark plug insulator and in at least part of the inner circumferential surface of the spark plug insulator in an area extending toward a distal end from a portion having a largest outer diameter.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: March 6, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kengo Fujimura, Toshitaka Honda, Hirokazu Kurono, Ryuji Nagae
  • INSULATOR AND SPARK PLUG
    Publication number: 20170256917
    Abstract: An insulator is rendered less breakable. A spark plug insulator is a tube-shaped spark plug insulator having a through hole extending in a direction of an axial line. The spark plug insulator contains alumina as a main component and mullite at at least part of the insulator. Mullite is contained in only an inner circumferential surface of the tube-shaped spark plug insulator and in at least part of the inner circumferential surface of the spark plug insulator in an area extending toward a distal end from a portion having a largest outer diameter.
    Type: Application
    Filed: July 23, 2015
    Publication date: September 7, 2017
    Inventors: Kengo FUJIMURA, Toshitaka HONDA, Hirokazu KURONO, Ryuji NAGAE