Patents by Inventor Franz J. Adrian

Franz J. Adrian 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 and apparatus for the two-stage crushing of brittle material for grinding
    Patent number: 4783012
    Abstract: A method and apparatus for the two-stage crushing of brittle material comprising a roll mill and a second mill downstream thereof, the output of the second mill being delivered to a sifter. The quantity of grit obtained in the sifting operation is divided between the roll mill and the second mill in such a way that the sum of the quantity of fresh material and the quantity of grit delivered to the roll mill remains constant.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: November 8, 1988
    Assignee: Krupp Polysius AG
    Inventors: Gotthardt Blasczyk, Norbert Patzelt, Heinz-Georg Mersmann, Franz J. Adrian, Hardy Kropf
  • Method and apparatus for the two-stage crushing of brittle material for grinding
    Patent number: 4783011
    Abstract: A method and apparatus for the two-stage crushing of brittle material comprising a roll mill and a mill connected downstream thereof, the output of the second mill being delivered to a sifter in which a second branch stream of the grit obtained in the sifting operation is returned to the roll mill and a further branch stream is returned to the second mill. A first control circuit keeps the sum of the quantity of fresh material and the quantity of grit constant, while a second control circuit divides the quantity of grit into two branch streams in such a way that the drive power of the roll mill remains constant.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: November 8, 1988
    Assignee: Krupp Polysius AG
    Inventors: Gotthardt Blasczyk, Norbert Patzelt, Heinz-Georg Mersmann, Franz J. Adrian, Hardy Kropf