Patents by Inventor Hans J. Grobler

Hans J. Grobler 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).

  • Staggered spiral splitters
    Patent number: 4836926
    Abstract: A spiral separator 1 is provided with a first pivotally mounted splitter (6) having an upstream working edge for dividing a slurry descending the sluice into two streams (A,B). A second pivotably mounted splitter (8) is positioned downstream and radially outwardly of the first and divides stream B into two streams (C, D) the second splitter being moveable to a position adjacent the downstream end of the first.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: June 6, 1989
    Assignee: Mineral Deposits Limited
    Inventor: Hans J. Grobler