Patents by Inventor Erik C. P. Christensen

Erik C. P. Christensen 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).

  • Vertical roller mill
    Patent number: 4382561
    Abstract: A vertical roller mill includes a grinding table positioned for rotation around a vertical axis and two upright grinding rollers resting on their peripheral grinding surfaces on the grinding table for grinding material thereon. Each of the grinding rollers is rotatably mounted on a respective fixed horizontal shaft connected at one end to a common, central frame and at the other end to a draw bar. Preferably, the draw bar is regulated by a hydraulic cylinder secured in a bracket which is anchored in the mill foundation.
    Type: Grant
    Filed: February 3, 1981
    Date of Patent: May 10, 1983
    Assignee: F. L. Smidth & Co.
    Inventors: Knud T. Andersen, Erik C. P. Christensen