Patents by Inventor Kozuka Kazuhiko

Kozuka Kazuhiko 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).

  • Rapid heat-dissipating type spark plug for internal combustion engines
    Patent number: 5017826
    Abstract: A rapid heat-dissipating type spark plug has a metallic shell which is made of material having a tensile stress of more than 40 Kg/mm.sup.2 with a thermal conductivity of more than 60 W/m.multidot.k.In another embodiment, there is provided a ground electrode which is made of nickel or nickel alloy.The ground electrode is connected to the metallic shell through a metallic ring which is made of different metal from the metallic shell such as steel, stainless steel or nickel alloy.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: May 21, 1991
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Takafumi Oshima, Kozuka Kazuhiko