US 4,444,656 A · Classifying apparatus and methods

Abstract

Classifying apparatus and methods for the separation of solids of differing sizes includes a screening deck having an inclined frame and a screen in the frame on which the solids are deposited and moved downwardly. A plurality of beams extend beneath the screen transversely of the frame and the ends of the beam are mounted to the frame by a resilient mounting to isolate vibrations of the beam from the frame. A tappet assembly is fixed to each of the beams and contacts the underside of the screen and a vibrator motor is mounted to each of the beams to directly vibrate the beam, the tappet assembly of each beam, and the screen. Controls may be provided for independently operating each of the vibrators to vary one or both of the frequency or the amplitude of the vibrations of the screen over its length. The screen preferably includes a plurality of screen portions which are crowned transversely of the frame by the tappet assemblies, and the tappet assemblies include a pair of spaced parallel bars of continuous length extending transversely of the frame and in contact with the screen.

Claims20

Dependent claims

Classifying apparatus comprising:

frame means including a pair of spaced elongate rigid members,
screen means supported in said frame means between said members,
beam means supported between said members and extending beneath said screen means,
tappet means fixed to said beam means and in continuous contact with said screen means at locations spaced from each other and from the ends of said screen means and vibratable independently of said frame means, and
vibrator means mounted on said beam means between said members and directly vibrating said beam means, tappet means and screen means.

2 more elements

Dependencies are inferred from the claim text.

Classifying apparatus and methods

Life of this patent

Classifying apparatus and methods

Life of this patent

Abstract

Claims20