Patents by Inventor Werner Liedtke

Werner Liedtke 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).

  • Shaft furnace and a method for the operation of the shaft furnace for the melting down of non-ferrous metals in a recycling process, particularly for the melting down of lead
    Patent number: 4382584
    Abstract: A shaft furnace for recycling non-ferrous metals is provided with a crane runway extending horizontally above the furnace opening, on which a movable carrier transports sorting containers to the furnace. The carrier is provided with a lifting and gripping mechanism for moving and transporting the sorting containers.The shaft furnace is provided with a plurality of individually sealable lock chambers which are locked and sealed from the furnace and the outside atmosphere by selectively opening or closing flaps. In addition, a good seal is provided between the sorting container and the shaft furnace by a sealing surface formed by a metal strip which is located opposite the sealing edge of the sorting container.
    Type: Grant
    Filed: June 10, 1981
    Date of Patent: May 10, 1983
    Assignee: Mannesmann Aktiengesellschaft
    Inventor: Werner Liedtke