Classifying – separating – and assorting solids – Sifting – Plane sifters
Reexamination Certificate
2005-10-11
2005-10-11
Walsh, Donald P. (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Plane sifters
C209S311000, C209S405000, C209S346000
Reexamination Certificate
active
06953121
ABSTRACT:
A vibrating screen assembly supported by springs is provided which is used to size separate rock and other material. The present invention includes increasing the natural frequency of the screen assembly by stiffening the individual screen decks of the screen assembly, to enable the screen assembly to operate at higher operating speeds without prematurely failing.
REFERENCES:
patent: 4381235 (1983-04-01), Mallaghan
patent: 5851393 (1998-12-01), Carr et al.
Boyce Benjamin James
Olsen Lawrence Calvin
Johnson Crushers International
Miller Jonathan R.
Schwabe Williamson & Wyatt
Walsh Donald P.
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