Patents by Inventor Tadahiro Hatayama

Tadahiro Hatayama 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 diaphragm valve
    Patent number: 4953826
    Abstract: A metal diaphragm valve comprises a valve cage, a metallic valve seat integral with the valve cage, a metal diaphragm having a peripheral edge portion supported in a liquid-tight manner by the valve cage and a central portion facing the valve to touch and leave the seat, a drive member for opening and closing the metal diaphragm, and a diaphragm pressing member interposed between the drive member and the metal diaphragm and adapted to press the diaphragm against the valve seat at a uniform sealing pressure.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: September 4, 1990
    Assignee: Motoyama Eng. Works, Ltd.
    Inventors: Tadahiro Ohmi, Yohichi Kanno, Kazuhiko Satoh, Tadahiro Hatayama
  • Metal diaphragm valve
    Patent number: RE34303
    Abstract: A metal diaphragm valve comprises a valve cage, a metallic valve seat integral with the valve cage, a metal diaphragm having a peripheral edge portion supported in a .[.liquid-tight.]. .Iadd.fluid-tight .Iaddend.manner by the valve cage and a central portion facing the valve to touch and leave the seat, a drive member for opening and closing the metal diaphragm, and a diaphragm pressing member interposed between the drive member and the metal diaphragm and adapted to press the diaphragm against the valve seat at a uniform sealing pressure.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: July 6, 1993
    Assignee: Motoyama Eng. Works, Ltd.
    Inventors: Tadahiro Ohmi, Yohichi Kanno, Kazuhiko Satoh, Tadahiro Hatayama