Patents by Inventor Francois P. Durieux

Francois P. Durieux 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).

  • Automatic purger for a hydraulically controlled double diaphragm pump
    Patent number: 4560324
    Abstract: The automatic purger has an intermediate chamber (11) one of the walls of which is formed by an elastic diaphragm (10), termed front diaphragm, whereas the other wall is formed by a second elastic diaphragm (12), termed rear diaphragm. This chamber is connected to a purger (20) formed by a body (21) defining a small internal enclosure (22) in which an element (25), which is highly permeable to the gas, is disposed. The invention is applicable to a hydraulically controlled or actuated pump of the reciprocating or displacement type.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: December 24, 1985
    Assignee: Clextral
    Inventor: Francois P. Durieux