Patents by Inventor Nobutuki Hotta

Nobutuki Hotta 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).

  • Glow plug and method of manufacturing the same
    Patent number: 6881930
    Abstract: A glow plug includes a ceramic heater having a resistance-heating element embedded at its end portion. In order to supply electricity to the resistance-heating element, first and second heater terminals are exposed on the surface of the ceramic heater. First and second terminal rings, which serve as metallic fitting members, are shrink-fitted to the surface of the ceramic heater in such a manner as to cover and be electrically connected to the exposed first and second heater terminals. A metal layer not higher than Ni in ionization tendency is formed on the inner circumferential surface of each of the first and second terminal rings.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: April 19, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takaya Yoshikawa, Nobutuki Hotta, Shinya Murakoshi, Hiroyuki Suzuki
  • Glow plug and method of manufacturing the same
    Publication number: 20040178185
    Abstract: A glow plug includes a ceramic heater having a resistance-heating element embedded at its end portion. In order to supply electricity to the resistance-heating element, first and second heater terminals are exposed on the surface of the ceramic heater. First and second terminal rings, which serve as metallic fitting members, are shrink-fitted to the surface of the ceramic heater in such a manner as to cover and be electrically connected to the exposed first and second heater terminals. A metal layer not higher than Ni in ionization tendency is formed on the inner circumferential surface of each of the first and second terminal rings.
    Type: Application
    Filed: January 23, 2004
    Publication date: September 16, 2004
    Applicant: NGK Spark Plug Co., Ltd.
    Inventors: Takaya Yoshikawa, Nobutuki Hotta, Shinya Murakoshi, Hiroyuki Suzuki