Patents Assigned to SAID Iwao Yamamoto, by said Moriro Koga
  • Off center electrode spark plug
    Patent number: 4101797
    Abstract: Disclosed is an improved spark plug in which a projection is provided at the end face of a central electrode and an earthing electrode is fixed by projection weld to the end surface of a main body to form a small gap between an outer angular portion of said projection and an underside angular portion of the nose of said earthing electrode, and which makes it possible to use a dilute air/fuel mixture and, hence, to decrease an amount of harmful exhaust gases.
    Type: Grant
    Filed: December 16, 1976
    Date of Patent: July 18, 1978
    Assignee: SAID Iwao Yamamoto, by said Moriro Koga
    Inventors: Iwao Yamamoto, Moriro Koga