Patents by Inventor David Ian Hoyer

David Ian Hoyer 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).

  • Centrifugal grinding mills
    Patent number: 7070134
    Abstract: The present invention relates to a centrifugal grinding mill comprising a vertical axis of revolution (1), a nutating axis (2) intersecting axis (1) at a point of nutation symmetry (3), a grinding chamber (4) symmetrical about axis (2) connecting with feed passage (5) at its upper end and having discharge openings (6) of a screening element (26) located within a plane area aligned normal to, symmetrical with, and intersected by the axis (2), and adjacent the plane containing the maximum diameter of the grinding chamber (4).
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: July 4, 2006
    Assignee: Hicom International PTY Limited
    Inventor: David Ian Hoyer