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US 5,178,338 AGranted
Process and apparatus for magnetic media milling
OwnerHoward Zakheim, James D. Goldschneider +2inventors
InventorsHoward Zakheim, James D. Goldschneider, Markus Zahn, Charles L. Hoffmeyer
Life of this patent
Estimating the term…
Abstract
Media mill (1) having a magnetic circuit of magnetic impellers (11) on a shaft (12), magnetized media, and a magnetizable outer shell (10) which provides improved efficiency. The impellers (43) are magnetized by being sandwiched between at least two permanent magnets (45) in or on the shaft (42), which magnets have the same polar charge facing each other.
Claims16
A media mill comprising a magnetizable container;
- a rotatable multi-polar magnetic agitator within the magnetizable container, the multi-polar magnetic agitator having a central shaft and a plurality of magnetic impellers on the shaft;
- and magnetizable media within the container, wherein the media particles are present in such quantity as to provide a media volume of at least about 25% and are sufficiently magnetized by the magnetic agitator so that the grinding efficiency is improved, the improvement being characterized by each of said impellers being sandwiched between at least two permanent magnets along the central shaft, wherein said two magnets have the same polar charge facing each other, such that a magnetic charge is induced in said each impeller, which results in the same polar charge on most of the surface area of the top, bottom, and side exposed faces of the impeller not in contact with the magnets.
A media mill comprising a magnetizable container;
- a rotatable multi-polar magnetic agitator within the magnetizable container, the multi-polar magnetic agitator having a central shaft and a plurality of magnetic impellers on the shaft;
- and magnetizable media within the container, wherein the media particles are present in such quantity as to provide a media volume of at least about 25% and are sufficiently magnetized by the magnetic agitator so that the grinding efficiency is improved, the improvement being characterized by each of said impellers being sandwiched between at least two permanent magnets, wherein said two magnets have the same polar charge facing each other, such that a magnetic charge is induced in said each impeller, which results in the same polar charge on substantially all of the top, bottom, and side exposed faces of the impeller not in contact with the magnets and wherein said plurality of impellers along the central shaft are configured such that the polar charge on the exposed faces of at least one of said impellers is opposite to the polar charge on the exposed faces of each of the two adjacent impellers, and wherein said plurality of impellers along the central shaft are configured such that the polar charge of the exposed faces of each of the impellers alternate along the shaft.
Dependencies are inferred from the claim text.