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Centrifugal grinding mills

  • US 7,070,134 B1
  • Filed: 10/16/2000
  • Issued: 07/04/2006
  • Est. Priority Date: 10/21/1999
  • Status: Expired due to Term
First Claim
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1. A centrifugal grinding mill comprising:

  • a grinding chamber having a longitudinal axis of symmetry, the grinding chamber being constrained and adapted to permit nutating motion of the axis of symmetry about a relatively stationary axis of the grinding mill, said axes intersecting at a point of nutation symmetry;

    a support member on which the grinding chamber is supported;

    a feed passage in communication with and directed towards the grinding chamber;

    driving means operatively coupled to the grinding chamber, and designed to drive the grinding chamber to effect the nutating motion; and

    a screening element located internally of the grinding chamber and being configured to permit particles of ground product to discharge from the chamber,wherein the screening element includes a screening surface oriented substantially normal to the longitudinal axis of the grinding chamber wherein ground product is discharged from the chamber in a generally axial direction.

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