Patents by Inventor Katsushiro Ishikawa, deceased

Katsushiro Ishikawa, deceased 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).

  • Metal laminate gasket with surface pressure adjusting ring
    Patent number: 5277433
    Abstract: The metal laminate gasket of the invention is used for an internal combustion engine having a hole to be sealed. The gasket is formed of a plurality of metal plates for constituting the metal laminate gasket, and a device for defining the hole of the engine with a curved portion and a flange. Inside the curved portion around the hole, a wire ring, at least one bead and a hollow ring are situated. The hollow ring is arranged between the curved portion and the bead. The thickness of a metal plate for the hollow ring is adjusted so that the surface pressures on the wire ring and the bead are regulated by the hollow ring when the gasket is tightened.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: January 11, 1994
    Assignee: Ishikawa Gasket Co., Ltd.
    Inventors: Katsushiro Ishikawa, deceased, Itsuo Ishikawa