Patents by Inventor Kazutoshi Funaba

Kazutoshi Funaba 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).

  • Vacuum gate valve
    Patent number: 5271602
    Abstract: A vacuum gate valve device having a vacuum path includes: a valve casing; a valve body provided in the valve casing, the valve body being allowed to reciprocate between two positions to close and open the vacuum path; a bonnet flange for closing the casing; driving member provided on the bonnet flange for reciprocably driving the valve body, the driving member having a stem shaft which is loosely inserted into a through hole of the bonnet flange and is coupled with the valve body; and a member for isolating a sliding portion of the stem shaft from the vacuum path.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: December 21, 1993
    Assignee: The Japan Steel Works Ltd.
    Inventor: Kazutoshi Funaba