Patents by Inventor Robert Woikowski

Robert Woikowski 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).

  • Sealing device for a coke oven door
    Patent number: 4032409
    Abstract: A sealing device for a coke oven door comprises first and second spaced apart metal sealing blades having respective substantially aligned sealing edges adapted to extend outwardly from the edge of the coke oven door. A metal spacer is mounted between the first and second sealing blades at a location spaced inwardly from the sealing edges and an elastic sealing strip is located between the two blades and has an outer elastic sealing edge which is substantially in alignment with or projects outwardly slightly beyond the blade sealing edges, and bears against the door frame.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: June 28, 1977
    Assignees: Firma Carl Still, Ruhrkohle AG
    Inventors: Johannes Knappstein, Heinrich Tewes, Robert Woikowski