US 5,029,760 AGranted

Centrifugal grinding and mixing apparatus

OwnerRodger L. Gamblininventor

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Abstract

A centrifugal mill adapted for the continuous grinding of granulated material into fine powder is disclosed. At least one pair of grinding chambers is provided. The grinding chambers are rotated about their own axes one revolution in the opposite direction to the orbiting direction for each orbit and the orbiting radius is about 1.2 to about 4.0 times the grinding chamber radius. Under these conditions the grinding chambers do not rotate relative to the machine base so that communication with the grinding chamber and any surrounding jacket may be made through flexible hoses or tubes thereby avoiding the need for rotating seals. If desired, the grinding chamber may be subjected to atmospheres of controlled temperature, pressure and composition. As the grinding chamber atmosphere is isolated from the ambient atmosphere, contamination is avoided.

Claims29

Dependent claims

A centrifugal grinding mill comprising

a base,
a rotatable drum assembly supported on said base for rotation about a central substantially horizontal axis,
said drum assembly including a pair of cylindrical grinding chambers having axes parallel to that of said rotatable drum assembly, said chambers being mounted in said drum assembly for rotation, relative to the drum assembly, about their respective said axes, said grinding chambers moving along orbital paths about said central axis as said drum assembly is rotated,
means for limiting rotation of said cylindrical grinding chambers about their respective said axes while allowing rotation of the drum assembly about the drum assembly axis, and
driving means supported by said base and drivingly interconnected with said rotatable drum assembly,
the positions at which said drum assembly is supported on said base and interconnected with said driving means being radially outward of said orbital paths of movement of said grinding chambers, whereby the grinding chambers can be continuously fed and operated without the use of relatively rotating connections.

3 more elements

Dependencies are inferred from the claim text.