Anti-siphon valve for swimming pool lint pot

Claim 1

A LINT POT FOR AN ABOVE-GROUND SWIMMING POOL OR THE LIKE, COMPRISING A HOUSING OPEN AT THE TOP, A REMOVABLE LID ENGAGING THE TOP OF THE HHOUSING, A POROUS STRAINER BASKET POSITIONED INSIDE THE HOUSING, RELEASABLE MEANS FOR LOCKING THE LID TO THE HOUSING TO CLOSE SEAL THE TOP, THE HOUSING HHAVING AN INLET PORTION EXTENDING FROM THE SIDE OF THE HOUSING ADJACENT TO THE TOP, THE INLET PORTION HAVING AN INLET HOLE OPENING INTO THE INTERIOR OF THE HOUSING FOR ADMITTING WATER, THE HOUSING HAVING AN OUTLET PORTION ADJACENT TO THE BOTTOM OF THE BASKET, WATER PASSING FROM THE INLET TO THE OUTLET THROUGH THE STRAINER BASKET, A FLAP VALVE MEMBER POSITIONED ON THE OUTSIDE OF THE OPENING, MEANS HINGEDLY SUPPORTING THE FLAP VALVE MEMBER IN POSITION TO CLOSE SAID INLET HOLE, WATER FLOWING INTO THE HOUSING URGING THE HINGED FLAP VALVE MEMBER TOWARD THE CLOSED POSITION, AND VALVE OPENING MEANS CONNECTED TO THE FLAP VALVE MEMBER AND MOVABLE THEREWITH, SAID VALV OPENING MEANS COMING INTO ENGAGEMENT WITH THE LID WHEN THE LID IS MOVED TO THE LOCKED POSITION, SAID VALVE OPENING MEANS HOLDING THE FLAP VALVE MEMBER AWAY FROM THE INLET HOLE WHEN THE LID IS IN THE LOCKED POSITION.