Patents by Inventor Toshiro Katagiri

Toshiro Katagiri 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).

  • Non-sliding gate valve for high vacuum use
    Patent number: 5002255
    Abstract: A non-sliding vacuum gate valve comprising a valve housing hermetically sealed to the outside, an opening formed in one of its side walls, and a valve body disposed within the valve housing and adapted to sealingly open or close the valve seat formed around the opening in which the mechanism for opening and closing the valve body sealingly open or close the valve seat is provided outside the valve housing, the mechanism being made to be able to carry out two subsequent movements, one to move the valve body in a direction substantially perpendicular to the valve seat, the other to move the valve body substantially orthogonal to a direction substantially perpendicular to the valve seat with the valve body being spaced apart from the valve.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: March 26, 1991
    Assignee: Irie Koken Kabushiki Kaisha
    Inventors: Toshio Sawa, Norikimi Irie, Yuzo Hayashi, Toshiro Katagiri