Cleaning system installation for swimming pools

Claim 1

SWIMMING POOL INSTALLATION COMPRISING A POOL HAVING A POOL WALL TOPPED BY A POOL DECK AND CONNECTING AT ITS LOWER END WITH THE POOL BOTTOM, SAID POOL WALL HAVING A SKIMMER CAVITY JUST BELOW SAID POOL DECK HAVING A FLOOR AND INCLUDING A DOWNWARDLY DIRECTED DRAIN OPENING, A VALVE PASSAGEWAY IN SAID WALL AT AN ELEVATION BELOW SAID SKIMMER CAVITY, MEANS FLOW CONNECTING SAID SKIMMER DRAIN OPENING WITH SAID VALVE PASSAGEWAY, A DRAIN IN SAID POOL BOTTOM, MEANS FLOW CONNECTING SAID POOL BOTTOM DRAIN WITH SAID VALVE PASSAGEWAY, VALVE IN SAID VALVE PASSAGEWAY, SAID VALVE BEING PROVIDED WITH OPENING MEANS, WHICH, IN THE INSTALLED POSITION OF SAID VALVE, MAY BE SELECTIVELY ROTATED TO BRING SAID OPENING MEANS EITHER INTO FLOW COMMUNICATION WITH SAID SKIMMER DRAIN CONNECTING MEANS OR SAID POOL BOTTOM DRAIN CONNECTING MEANS, A POOL PUMP SUCTION LINE, MEANS FLOW CONNECTING SAID VALVE PASSAGEWAY WITH SAID PUMP SUCTION LINE, WHEREBY SAID PUMP SUCTION LINE MAY BE SELECTIVELY CONNECTED TO EITHER SAID SKIMMER DRAIN OR SAID POOL BOTTOM DRAIN, AND SKIMMER MEANS IN SAID SKIMMER CAVITY, SAID SKIMMER MEANS INCLUDING A PAIR OF SIDE WALLS WITHIN AND ADJACENT THE ENTRANCE TO SAID CAVITY, A SCREEN CAGE INCLUDING A SCREEN BOTTOM AND UNSTANDING SIDES, WITH SAID SIDES CONNECTED TO THE REAR ENDS OF SAID WALLS, SAID CAGE BEING OF A LENGTH TO EXTEND OVER SAID SKIMMER DRAIN OPENING, AND A WEIR ASSEMBLY EXTENDING BETWEEN SAID SIDE WALLS AND PIVOTALLY SECURED THERETO ADJACENT THE ENTRANCE TO SAID SKIMMER CAVITY, SAID WEIR ASSEMBLY INCLUDING A PAIR OF PIVOT ARMS, EACH ADAPTED AT ONE END FOR PIVOTAL SECUREMENT TO ONE OF SAID SIDE WALLS, A FLOAT GATE OF A LENGTH COMPARABLE TO THE WIDTH OF SAID SKIMMER CAVITY AND HINGEDLY MOUNTED TO THE FREE ENDS OF SAID PIVOT ARMS IN SLIGHT SPACED RELATIONSHIP TO THE FLOOR OF SAID CAVITY WHEN SAID ARMS ARE IN THEIR LOWERMOST POSITION, SAID FLOAT GATE HAVING AN APRON EXTENDING TO THE OTHER SIDE OF THE HINGE AXIS OF SAID GATE AND ALSO IN SLIGHT SPACED RELATIONSHIP TO THE FLOOR OF SAID CAVITY IN THE LOWERMOST POSITION OF SAID PIVOT ARMS.