Classifying – separating – and assorting solids – Sifting – Elements
Reexamination Certificate
2006-01-24
2006-01-24
Walsh, Donald P. (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Elements
C209S325000, C209S409000, C209S421000, C209S315000
Reexamination Certificate
active
06988624
ABSTRACT:
The vibrating screen has a frame, a screen box, two pairs of springs supporting the screen box over the frame and a driven eccentric shaft mounted under the screen box. The vibrating screen is characterized by a loading pan affixed to the upper end of the screen box. The loading pan has a central region over the upper springs such that a flexion of the structural members under the loading pan is minimum. The loading pan is wider than the screen box and has sloped sides forming a funnel on the upper end of the screen box to retain the side portions of a load until most of the central portion has been moved to the screen box. In another aspect, each spring has torsion bushings therein, with a pair of arms joining the torsion bushings and forming an angle pointing toward the lower end of the screen box.
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Miller Jonathan R
Theriault Mario
Walsh Donald P.
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