Patents by Inventor Leo Ryan

Leo Ryan 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).

  • Backwash method and apparatus
    Patent number: 5017241
    Abstract: A method and apparatus for cleaning filter elements that are vertically positioned within a filter vessel that has a tube sheet dividing the filter vessel into a lower filter compartment and an upper plenum compartment. A fixed volume of backwash liquid is rapidly directed from the plenum compartment above the tube sheet through the filter elements into the filter compartment that has been drained of liquid. The rapid movement of the backwash liquid is a result of a pressure differential between the plenum compartment and the filter compartment.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: May 21, 1991
    Assignee: The Graver Company
    Inventor: Leo Ryan