Filtering structure

Claim 1

A FILTERING STRUCTURE COMPRISING, IN COMBINATION: A FILTER TANK UNIT INTO WHICH LIQUID TO BE FILTERED IS ADMITTED, A ROTATABLE FILTER MOUNTED WITHIN SAID TANK UNIT, SAID ROTATABLE FILTER HAVING A FILTER SCREEN AFFIXED TO THE PERIPHERY OF THE ROTATABLE FRAME OF SAID FILTER, FIRST DRIVE MEANS CONNECTED TO SAID FILTER TO ROTATE SAID FILTER, SAID TANK UNIT HAVING AN INCLINED SURFACE SLOPING BETWEEN THE BOTTOM OF SAID TANK UNIT AND AN ELEVATED DISCHARGE OPENING PROVIDED IN SAID TANK UNIT, A CONVEYOR SCRAPER MECHANISM DISPOSED WITHIN SAID TANK UNIT AND INCLUDING AT LEAST ONE ENDLESS CONVEYOR ARRANGED ADJACENT THE BOTTOM OF SAID TANK UNIT AND SAID INCLINED SURFACE, A PLURALITY OF SCRAPER ELEMENTS AFFIXED TO AND CARRIED BY SAID ENDLESS CONVEYOR, SECOND DRIVE MEANS OPERATIVELY CONNECTED TO SAID ENDLESS CONVEYOR TO MOVE SAID ENDLESS CONVEYOR AND ITS ASSOCIATED SCRAPER ELEMENTS, SAID ROTATABLE FILTER HAVING A SUCTION CONDUIT COMMUNICATING WITH THE INTERIOR THEREOF AND A FILTRATE SUPPLY CONDUIT INCLUDING A SERIES OF NOZZLES FOR DIRECTING HIGH VELOCITY JETS OF FILTRATE UPON THE INNER SURFACES TOWARDS THE OUTER SURFACES OF SAID FILTER SCREEN, PUMP MEANS OPERATIVELY CONNECTED TO SAID SUCTION CONDUIT AND SAID FILTRATE SUPPLY CONDUIT, TURBULENCE-REDUCING MEANS MOUNTED IN SAID TANK UNIT ADJACENT SAID FILTER SCREEN AND ALIGNED WITH SAID SERIES OF NOZZLES, AND A TILTABLE SURFACE SKIMMING DEVICE WHICH OPERATES IN RESPONSE TO ROTATION OF SAID ROTATABLE FILTER TO REMOVE FLOTAGE FROM THE SURFACE OF SAID LIQUID TO BE FILTERED, WHEREBY SAID LIQUID IS DRAWN THROUGH SAID FILTER SCREEN OF THE ROTATING FILTER BY SUCTION CREATED IN THE INTERIOR OF SAID FILTER BY MEANS OF SAID SUCTION CONDUIT AND ASSOCIATED PUMP MEANS, AND PARTICLES ADHERING TO THE OUTER SURFACES OF SAID FILTER SCREEN ARE REMOVED THEREFROM BY SAID HIGH VELOCITY JETS WHICH DIRECT SAID PARTICLES THROUGH SAID TURBULENCE-REDUCING MEANS INTO THE PATH OF SAID SCRAPER ELEMENTS WHICH REMOVE PARTICLES ACCUMULATING ON THE BOTTOM AND SLOPING SURFACE OF SAID TANK UNIT AND DISCHARGING SAID PARTICLES THROUGH SAID PARTICLE DISCHARGE OPENING PROVIDED IN SAID TANK UNIT.