Solid material comminution or disintegration – Apparatus – Loose grinding body comminutor
Reexamination Certificate
2007-02-13
2007-02-13
Larson, Lowell A. (Department: 3725)
Solid material comminution or disintegration
Apparatus
Loose grinding body comminutor
C241S046110, C241S046170, C241S101800
Reexamination Certificate
active
10865448
ABSTRACT:
Apparatus and method for dispersing solid constituents into a liquid vehicle employ an immersion mill operating in combination with a low shear mixer blade assembly which sweeps the walls of a tank containing a batch of solid constituents in a liquid vehicle to circulate the batch through the immersion mill to carry out a milling operation to establish a relatively high viscosity mixture having a high degree of uniformity. The immersion mill includes an improvement wherein a helical screw impeller is placed within a tubular inlet passage for moving the batch longitudinally through the tubular inlet passage into the immersion mill, the helical screw impeller including a helical flight extending along the length of the tubular inlet passage and having a diameter complementary to the diameter of the tubular inlet passage and a pitch less than the length of the tubular inlet passage such that the helical flight spans the diameter of the tubular inlet passage along plural turns of the helical flight.
REFERENCES:
patent: 4906577 (1990-03-01), Armstrong et al.
patent: 5184783 (1993-02-01), Hockmeyer et al.
patent: 5346147 (1994-09-01), Ishikawa et al.
patent: 5497948 (1996-03-01), Hockmeyer
patent: 5549384 (1996-08-01), Reynolds
patent: 6029915 (2000-02-01), Inoue
Hockmeyer Equipment Corp.
Jacob Arthur
Pahng Jason Y.
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