Patent ID: 7810648

Claim:
A screen assembly for separating material according to particle size, said screen assembly comprising: a base; a screen box having at least one screen medium secured thereto and a pair of mutually opposed bearings thereon; a shaft having a first pair of eccentric journals that are rotatably supported in the respective pair of mutually opposed bearings and a second pair of eccentric journals positioned outside of said screen box, said shaft rotatable about its axis to vibrate said screen box; at least one articulated suspension assembly comprising: a first leg having a first torsion joint and a second torsion joint; a second leg having a third torsion joint and a fourth torsion joint; and a third leg having a first end pivotably secured to said second torsion joint and a second end pivotably secured to said third torsion joint; wherein said at least one articulated suspension assembly pivotally interconnects said screen box and said base so that said first torsion joint is pivotally secured to said screen box and said fourth torsion joint is pivotally secured to said base to dampen vibrations acting upon said screen box so that substantially no vibrational forces are transmitted to said base.