Patents by Inventor Finn Lass

Finn Lass 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 and method of use thereof
    Patent number: 4485974
    Abstract: The present invention relates to a vertical roller mill including a grinding roller which is urged against a grinding path on a grinding table by a hydraulic cylinder. The loading on the roller is measured by a transducer and the acceleration of the roller by an accelerometer. Resulting signals are combined at a controller which controls a valve through which hydraulic fluid is supplied to the hydraulic cylinder, so that the loading is compensated for the influence of the instantaneous velocity and acceleration of the roller.
    Type: Grant
    Filed: December 15, 1981
    Date of Patent: December 4, 1984
    Assignee: F. L. Smidth & Co.
    Inventor: Finn Lass