Air replenishing device for air pressure operated water supply system

Claim 1

IN A WATER SUPPLY SYSTEM THE COMBINATION WITH A TANK PROVIDED WITH AN OUTLET PIPE THROUGH WHICH WATER MAY FLOW UNDER THE PRESSURE EXERTED BY AIR COMPRESSED IN THE TANK ABOVE THE WATER THEREIN DUE TO A RISE IN THE LEVEL OF WATER IN THE TANK, OF MEANS FOR REPLENISHING THE AIR IN THE TANK COMPRISING A CASING HAVING A FLOWWAY THERETHROUGH THROUGH WHICH WATER MAY FLOW FROM THE TANK AND A BORE INTERSECTING THE FLOWWAY, PLUNGER MEANS SLIDABLY DISPOSED IN THE BORE FOR LINGITUDINAL MOVEMENT THEREIN INTO AND OUT OF A POSITION TO OPEN THE FLOWWAY, SAID CASING HAVING A FIRST INTERNAL CHAMBER INTO WHICH THE BORE OPENS AT ONE END AND INTO WHICH THE PLUNGER MEANS IS EXTENDED AND A SECOND INTERNAL CHAMBER SPACED FROM SAID FIRST CHAMBER, A FIRST FLEXIBLE DIAPHRAGM EXTENDING ACROSS SAID FIRST CHAMBER, AND A SECOND FLEXIBLE DIAPHRAGM EXTENDING ACROSS SAID SECOND CHAMBER, SAID PLUNGER MEANS BEING CONNECTED TO THE DIAPHRAGM IN SAID FIRST CHAMBER, SAID CASING HAVING AN OPENING FROM SAID FIRST CHAMBER INTO SAID SECOND CHAMBER AND MEANS SLIDABLY EXTENDED THROUGH SAID OPENING AND CONNECTING SAID DIAPHRAGMS TO CAUSE THE DIAPHRAGMS TO FLEX TOGETHER, MEANS FOR ALLOWING AN INFLOW OF AIR INTO SAID SECOND CHAMBER ON ONE SIDE OF THE SECOND DIAPHRAGM UPON FLEXING OF SAID SECOND DIAPHRAGM IN RESPONSE TO MOVEMENT OF THE PLUNGER MEANS INTO FLOWWAY OPENING POSITION AND TO CAUSING AN OUTFLOW OF AIR FROM THE SECOND CHAMBER ON SAID ONE SIDE OF THE SECOND DIAPHRAGM INTO SAID TANK IN RESPONSE TO MOVEMENT OF SAID PLUNGER MEANS OUT OF FLOWWAY OPENING POSITION, SAID CASING HAVING A PASSAGEWAY OPENING INTO THE FLOWWAY UPSTREAM OF SAID BORE AND LEADING INTO SAID FIRST CHAMBER ON ONE SIDE OF SAID FIRST DIAPHRAGM TO APPLY THE PRESSURE OF WATER FROM THE TANK TO SAID FIRST DIAPHRAGM TO URGE THE FIRST DIAPHRAGM IN A DIRECTION TO MOVE THE PLUNGER MEANS INTO FLOWWAY OPENING POSITION AND PASSAGEWAYS IN COMMUNICATION WITH SAID FLOWWAY DOWNSTREAM OF SAID BORE AND LEADING INTO SAID CHAMBERS AT LOCATIONS TO CAUSE FLEXING OF THE DIAPHRAGMS IN A DIRECTION TO MOVE THE PLUNGER MEANS INTO FLOWWAY OPENING POSITION UPON THE OUTFLOW OF WATER THROUGH THE FLOWWAY, AND MEANS FOR MOVING THE PLUNGER MEANS OUT OF FLOWWAY OPENING POSITION UPON CESSATION OF SUCH OUTFLOW OF WATER THROUGH THE FLOWWAY.