Patents by Inventor Rolf G. J. Nordengren

Rolf G. J. Nordengren 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).

  • Method for washing filter-cakes and a spray nozzle intended for use with the method
    Patent number: 4139465
    Abstract: The present invention is concerned with a method for washing filter-cakes and a spray nozzle intended for use with the method.The invention provides a method of washing filter-cakes transported by a rotary belt filter, the filter-cake being caused to pass along a washing station by means of a conveyor belt having longitudinally extending side ridges and being smoothed by means of a doctor, in which method washing liquid is dispersed over the filter-cake and caused to pass there through by means of a vacuum on the undersurface of the filter-cake, wherein washing liquid is supplied to the filter-cake in the form of a laminar flow across the major portion of the width of the filter-cake, said flow having a slight turbulence in a zone adjacent each side ridge.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: February 13, 1979
    Assignee: Nordengren Patenter AB
    Inventor: Rolf G. J. Nordengren