Patents by Inventor Werner Nawroth

Werner Nawroth 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).

  • Control valve for viscous material pumps
    Patent number: 4392510
    Abstract: A control valve for viscous material pumps has a valve plate reciprocally movable in a flat housing divided in half to control the flow channels of the valve. The plate is movable in a wear shell inlaid in the housing and having covering rings along the flow channels.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 12, 1983
    Assignee: Friedrich W. Schwing, GmbH
    Inventors: Horst Heckmann, Werner Nawroth