Classifying – separating – and assorting solids – Sifting – Plane sifters
Patent
1978-10-02
1980-04-08
Lutter, Frank W.
Classifying, separating, and assorting solids
Sifting
Plane sifters
209409, 209421, B07B 128
Patent
active
041971949
ABSTRACT:
A portable loam screening apparatus includes a nearly-square sloping shaker screen supported by a box-like frame. The frame has a tall end and a short end joined by two sides. Funneling surfaces directed toward the screen are provided along the upper edges of the tall end and the sides. The short end is closed to provide a wall between separated loam and coarse material. A mixture of loam and coarse material is dumped onto the shaker screen from the shovel of an excavating vehicle. The coarse material falls from the lower end of the shaker screen outside of the frame, and the loam passes through the shaker screen to within the box-like frame. The separated loam falls down a sloping table within the frame and can then be retrieved by an excavating vehicle through the open tall end of the frame. A set of wheels mounted to one side of the frame is moveable relative to the frame from an operative position for transporting the apparatus to an inoperative position for resting the frame flush on the ground. A trailer hitch is mounted to the other side of the frame and the shaker power source is mounted above the hitch.
REFERENCES:
patent: 1806934 (1931-05-01), Deister
patent: 2284692 (1942-06-01), Strube
patent: 2319725 (1943-05-01), Drinkwater
patent: 2983381 (1961-05-01), Ball
patent: 3035724 (1962-05-01), Clark et al.
patent: 3307698 (1967-03-01), Haffner
Brook David E.
Hokanson Jon E.
Lutter Frank W.
Smith James M.
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