Patents by Inventor Kazuki KOIKE

Kazuki KOIKE 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: 10290999
    Abstract: A base end portion of a ground electrode of a spark plug includes a skin portion, an intermediate portion, and a core portion 52. A center cross section CP containing the center axis PX of the spark plug and the center axis EX of the base end portion includes a first multilayer portion in which the intermediate portion is disposed inward of the skin portion and the core portion is disposed inward of the intermediate portion, and a second multilayer portion in which the skin portion and the core portion are in direct contact with each other. The center cross section CP includes an intersection point PI at which a first boundary line BLa between the metallic shell and the skin portion and a second boundary line between the metallic shell and the core portion meet with a third boundary line BLc.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: May 14, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kazuki Koike, Takehito Kuno
  • SPARK PLUG
    Publication number: 20170025822
    Abstract: A base end portion of a ground electrode of a spark plug includes a skin portion, an intermediate portion, and a core portion 52. A center cross section CP containing the center axis PX of the spark plug and the center axis EX of the base end portion includes a first multilayer portion in which the intermediate portion is disposed inward of the skin portion and the core portion is disposed inward of the intermediate portion, and a second multilayer portion in which the skin portion and the core portion are in direct contact with each other. The center cross section CP includes an intersection point PI at which a first boundary line BLa between the metallic shell and the skin portion and a second boundary line between the metallic shell and the core portion meet with a third boundary line BLc.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 26, 2017
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kazuki KOIKE, Takehito KUNO