Filter nozzle

Claim 1

IN A LIQUID FILTER PROVIDED WITH FILTER MATERIAL AND WITH A BOTTOM SUPPORTING SAID FILTER MATERIAL, SAID BOTTOM HAVING A PLURALITY OF SUBSTANTIALLY CYLINDRICAL BORES EXTENDING THERETHROUGH, AND A PLURALITY OF NOZZLES SECURED IN SAID BORES, EACH OF SAID NOZZLES HAVING A SUBSTANTIALLY CYLINDRICAL HOLLOW SHANK EXTENDING INTO ONE OF SAID BORES, EACH OF SAID NOZZLES HAVING A FLANGE AT ONE END OF SAID SHANK, THE WIDTH OF SAID FLANGE BEING GREATER THAN THAT OF SAID BORE, SAID FLANGE EXTENDING OVER SAID BORE AND ABUTTING SAID BOTTOM, AND A NOZZLE HEAD MOUNTED ON SAID FLANGE, THE IMPROVEMENT WHEREIN EACH SAID SHANK IS PROVIDED WITH A PLURALITY OF SUBSTANTIALLY ANNULAR RIBS MOUNTED ON THE PERIPHERY OF SAID SHANK, SAID RIBS BEING SERIALLY ARRANGED IN AXIALLY SPACED RELATION TO EACH OTHER, SAID RIBS BEING MADE OF SOFT ELASTIC MATERIAL AND BEING EASILY DEFORMABLE, SAID RIBS BEING RELATIVELY THICK ADJACENT SAID SHANK, AND THEREFROM TAPERING OUTWARD TO RELATIVELY THIN LIPS, SAID RIBS BEING IN BENT FRICTIONAL ENGAGEMENT WITH THE WALL OF THE RESPECTIVE BORE OF SAID FILTER BOTTOM, THE DIAMETER OF SAID RIBS WHEN IN UNBENT CONDITION BEING GREATER THAN THE DIAMETER OF THE RESPECTIVE BORE RECEIVING SAME, SAID SHANKS BEING LONGER THAN THE THICKNESS OF SAID BOTTOM WHEREBY AT LEAST ONE RIB OF EACH SHANK IS DISPOSED ON THE OUTSIDE OF THE RESPECTIVE BORE IN THE BOTTOM ON THE OPPOSITE SIDE OF THE BOTTOM FROM SAID NOZZLE.