Rotary filter and method

Claim 1

A METHOD OF SEPARATING SUSPENDED PARTICLES FROM A SUSPENSION THEREOF IN LIQUID, WHICH COMPRISES CAUSING SAID PARTICLE LADEN LIQUID TO FLOW ACROSS A WALL HAVING A SUBMERGED PERVIOUS PORTION FORMED OF SPACED PARTS WHICH DEFINE A MULTIPLICITY OF OPENINGS THEREBETWEEN, ROTATING SAID WALL ACROSS SAID FLOW WITH A FREQUENCY AND SPEED RELATIVE TO THE PARTICLES FLOWED THERETO SUCH THAT THE SPACED PARTS OF SAID WALL ENCOUNTER SUBSTANTIALLY ALL OF SAID PARTICLES AND DYNAMICALLY ACT UPON SUCH PARTICLES AND THE LIQUID IMMEDIATELY ADJACENT THERETO TO DRIVE SUCH PARTICLES BACK AWAY FROM SAID WALL, MAINTAINING SUBSTANTIALLY THE BODY OF LIQUID AS A WHOLE SUBSTANTIALLY QUIESCENT BY FLOWING THE SUSPENSION TO THE WALL OF THE DRUM AT SUCH A RATE TO SUBSTANTIALLY COUNTERACT THE TENDENCY OF THE ROTATING DRUM TO ROTATE SAID BODY, MINIMIZING THE ROTATION OF LIQUID IN THE VICINITY OF SAID WALL TO ENSURE THAT THE SPEED OF THE SPACED PARTS IS SUFFICIENTLY GREATER RELATIVE TO THE SPEED OF THE PARTICLES FLOWED THERETO TO REPEL THE LATTER.