Patents by Inventor Koyu Yamasaki

Koyu Yamasaki 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).

  • Method of making metal gaskets
    Patent number: 4282643
    Abstract: This is a method of making metal gaskets by coating a hollow cylindrical metal blank on each of the entire inner and outer peripheral surfaces with a soft metal to be of a fixed thickness and then cutting it off along an imaginary conical surface having an apex on its center axis.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: August 11, 1981
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Koyu Yamasaki, Yousuke Iino
  • Sealing means
    Patent number: 4202556
    Abstract: This is a sealing means to form a tight seal between two members opposed to each other, one of which has a flat contact surface formed for contacting one end of a frustoconical metal gasket. The other member is provided with a groove opening toward the contact surface, hold the metal gasket on the other end portion within the groove and is also provided with a wall surface for contacting the surface of the first sealing end. The wall surface is arranged as required so as to be movable in the direction in which the sealing force acts.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: May 13, 1980
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Mamoru Makishima, Koyu Yamasaki