Classifying – separating – and assorting solids – Sifting – Elements
Patent
1979-01-05
1980-09-16
Hill, Ralph J.
Classifying, separating, and assorting solids
Sifting
Elements
209257, B07B 102
Patent
active
042228662
ABSTRACT:
A filter box for filtering trash from sand is disclosed. The box features a rectangular portion and a trapezoidal portion. The trapezoidal portion is enclosed by tapered sidewalls and an overlying trapezoidal top wall to form a funnel. The rectangular portion has upwardly projecting sidewalls which connect with the tapered sidewalls. A screen is fitted within the sidewalls of the rectangular portion and is utilized to filter, from sand, any trash that may be present. The filtered sand is then replaced into the receptacle from which it came by pouring it through the formed funnel of the filter box of this invention.
REFERENCES:
patent: 20000 (1858-04-01), McNiell
patent: 1593447 (1926-07-01), Friedman
Hill Ralph J.
Ray David L.
Spielman, Jr. Edgar E.
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