Classifying – separating – and assorting solids – Sifting – Combined type
Patent
1978-04-17
1979-05-01
Halper, Robert
Classifying, separating, and assorting solids
Sifting
Combined type
209235, 209257, 209364, 209437, 74 61, 366128, 198753, B07B 136, B65G 2504
Patent
active
041522559
ABSTRACT:
The invention relates to vibratory material handling apparatus and more particularly to a dual exciter system derive for vibrating the apparatus wherein the exciters are positioned on either side of the center of gravity of the apparatus and direct vibrations at obtuse and acute angles, respectively, through the center of gravity of the apparauts, the arrangement being much whereby the vibratory force exerted by each exciter may selectively be varied so as to cause the apparatus to vibrate vertically, or displaced from the vertical, so as to convey in one direction or the opposite direction. The arrangement is such that the spring system connecting the exciters to the material-handling apparatus acts as isolation springs when the vibration generator associated therewith is inoperative, and as tuned natural frequency systems when the vibrator is actuating. The invention also provides a shakeout screen and sand lump breaking apparatus combined into a single unit, thereby providing an apparatus particularly useful in removing foundry sand from castings and breaking down lumps in the sand to permit the reuse thereof.
REFERENCES:
patent: 3035699 (1962-05-01), Bruderlein et al.
patent: 3068996 (1962-12-01), Musschoot
patent: 3348664 (1967-10-01), Renner
patent: 3358815 (1967-12-01), Musschoot et al.
General Kinematics Corporation
Halper Robert
Hokanson Jon E.
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