Device in a screen filter fitted with a sloping screen

Claim 1

IN SCREEN FILTER CONSTRUCTION IN COMBINATION, AN ANNULAR SCREEN MEMBER FORMED TO SLOPE DOWNWARDLY FROM THE OUTER PERIPHERY TO THE INNER PERIPHERY THEREOF, AN ANNULAR INTAKE CHANNEL MEMBER FOR UNFILTERED LIQUID FORMED WITH CONCENTRIC INNER AND OUTER WALLS WITH THE TOP OF SAID INNER WALL BEING DISPOSED AT A LOWER LEVEL THAN THE TOP OF SAID OUTER WALL, SAID CHANNEL MEMBER SURROUNDING SAID OUTER PERIPHERY OF SAID SCREEN MEMBER AND BEING POSITIONED BELOW THE SAME, SAID TOP OF SAID INNER WALL SUPPORTING SAID SCREEN MEMBER, LYING AT THE SAME LEVEL AS AND ENGAGING SAID OUTER PERIPHERY WHEREBY LIQUID TO BE FILTERED ONTO SAID SCREEN CAN FLOW UPWARDLY IN SAID CHANNEL AND AROUND AND OVER SAID OUTER PERIPHERY TO BE FILTERED IN FLOWING FROM SAID OUTER PERIPHERY TOWARDS SAID INNER PERIPHERY, OUTLET MEANS FOR SOLID IMPURITIES POSITIONED AT SAID INNER PERIPHERY, ROTATABLE MEANS FOR DIRECTING A SHOWER OF RINSING LIQUID UPWARDLY FROM BENEATH AND AGAINST SAID SCREEN ANN SAID ANNULAR INTAKE CHANNEL MEMBER BEING FORMED WITH A HORIZONTAL PARTITION DIVIDING SAID CHANNEL MEMBER INTO AN UPPER PORTION AND AN ANNULAR UNINTERRUPTED LOWER PORTION, SAID UPPER PORTION BEING FORMED WITH RADIAL PARTITIONS DIVIDNG SAID UPPER PORTION INTO RADIAL COMPARTMENTS, AND MEANS FORMED IN SAID HORIZONTAL PARTITION IN REGISTRY WITH EACH OF SAID RADIAL COMPARTMENTS FOR INDIVIDUALLY CONNECTING AND DISCONNECTING EACH OF SAID RADIAL COMPARTMENTS SEPARATELY WITH RESPECT TO SAID UNINTERRUPTED LOWER CHANNEL PORTION.