Patents by Inventor Mitsuyosi Saito

Mitsuyosi Saito 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 gasket, vacuum flange for the metal gasket, and vacuum seal structure using the metal gasket
    Patent number: 5630592
    Abstract: A ring-shaped metal gasket with the cross-section thereof being substantially rectangular shaped, with the ratio (t/w) of the thickness t of the ring portion to the width w thereof being in the range of 0.5 to 4, having a Vickers hardness in the range of 50 to 120; a vacuum flange for a metal gasket, including a sealing groove for receiving a metal gasket at the surface of the flange, the width of a cross section of the groove gradually decreasing in the direction of the depth thereof, an outer side wall section of the sealing groove being substantially perpendicular to the flange surface, and an inner side wall section of the sealing groove being inclined with respect to the flange surface, with a difference in level being provided so that the flange surface positioned to the inside of the sealing groove is lower than the flange surface positioned to the outside of the sealing groove, and a vacuum seal structure including the above gasket and flange are disclosed.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: May 20, 1997
    Assignees: Japan Atomic Energy Research Institute, Japan Vac's Metal Co., Ltd.
    Inventors: Kenjiro Obara, Yoshio Murakami, Mitsuyosi Saito