Filter for contaminated liquids

Claim 1

IN A FILTER FOR CONTAMINATED LIQUIDS OF THE TYPE UTILIZING A MOVABLE AND EXPENDABLE SHEET OF FILTER MEDIUM, A ROTATABLY MOUNTED CONVEYOR HAVING AN INCLINED UPPER FLIGHT, INLET MEANS FOR INTRODUCING FILTER MEDIUM FROM A SUPPLY OF SUCH FILTER MEDIUM INTO SAID FILTER AND ONTO SAID UPPER FLIGHT OF SAID CONVEYOR AT THE LOWER END PORTION THEREOF, SAID INLET MEANS INCLUDING A LIQUID TIGHT SEAL ACROSS SAID LOWER END PORTION PERMITTING THE FILTER MEDIUM TO MOVE WITH SAID CONVEYOR WHILE PREVENTING LEAKAGE OF UNFILTERED LIQUID, AND MOTOR MEANS IN DRIVING CONNECTION WITH SAID CONVEYOR, MEANS FOR FILTERING THE LIQUID TO BE FILTERED THROUGH SAID FILTER MEDIUM, COMPRISING A PLURALITY OF SPRAY NOZZLES MOUNTED IN SAID FILTER TO DISCHARGE THE LIQUID TO BE FILTERED AGAINST THE TOP SURFACE OF SAID SHEET OF FILTER MEDIUM AT DIFFERENT ANGLES, AND MEANS FOR DISCHARGING LIQUID TO BE FILTERED FROM SAID NOZZLES AND IMPINGING IT AGAINST SAID TOP SURFACE AT A PREDETERMINED PRESSURE TO FORCE AT LEAST PART OF SAID LIQUID THROUGH SAID FILTER MEDIUM, A MATERIAL DISCHARGE OUTLET AT THE UPPER END PORTION OF SAID UPPER FLIGHT, MEANS ACTUATING SAID MOTOR MEANS TO DRIVE SAID CONVEYOR WHEN THE LEVEL OF THE UNFILTERED LIQUID AT SAID LOWER END PORTION OF SAID FILTER REACHES A PREDETERMINED UPPER ELEVATION AND STOPPING SAID MOTOR MEANS WHEN SAID LIQUID LEVEL REACHES A PREDETERMINED LOWER ELEVATION, MEANS FOR WITHDRAWING A PREDETERMINED QUANTITY OF UNFILTERED LIQUID FROM SAID LOWER END PORTION AND RETURNING IT TO SAID SPRAY NOZZLES, AND MEANS FOR COLLECTING FILTERED LIQUID AND WITHDRAWING IT TO A POINT OF USE, SAID UPPER FLIGHT PRESENTING A SUPPORTING SURFACE FOR SAID FILTER MEDIUM WHICH IS FLAT FROM ITS LOWER TO ITS UPPER END.