Patents by Inventor Karl-Heinz Dammertz

Karl-Heinz Dammertz 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).

  • Grinding process and apparatus
    Patent number: 4927086
    Abstract: The invention relates to a grinding process and apparatus for the simultaneous production of at least two finished products of differing fineness using a ring mill. Pre-classification is carried out in the nozzle ring by adjusting the air to entrain and carry upwards relatively fine constituents. The coarser constituents are discharged downwardly by gravity and subsequently may be conveyed upwards by an elevator and subjected to a second classification in which at least a proportion is extracted as finished product.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: May 22, 1990
    Assignee: Krupp Polysius AG
    Inventors: Heinrich Henne, Karl-Heinz Dammertz, Lutz T. Schneider, Gotthard Blasczyk