Automatic water treatment system

Claim 1

IN A WATER TREATMENT APPARATUS, A TREATMENT TANK, A BED OF EXCHANGE MATERIAL POSITIONED IN THE BOTTOM OF SAID TREATMENT TANK, A BRINE TANK, A CONDUIT FOR CONNECTING SAID BRIME TRANK AND TREATMENT TANK, DRAIN MEANS ASSOCIATED WITH SAID TREATMENT TANK, A VALVE STRUCTURE POSITIONED WITHIN THE UPPER PORTION OF SAID TREATMENT TANK AND HAVING SAID CONDUIT AND DRAIN MEANS CONNECTED THEREWITH AND ARRANGED TO CONTROL THE FLOW OF WATER AND BRINE THROUGH THE TANK, SAID VALVE STRUCTURE INCLUDING A FIRST CHAMBER AND A SECOND CHAMBER ADJOINING AND COMMUNICATING WITH ONE ANOTHER, A VALVE SEAT AT THE JUNCTION OF SAID CHAMBERS, A FIRST PASSAGE IN SAID VALVE STRUCTURE IN COMMUNICATION WITH SAID FIRST CHAMBER AND WITH THE INTERIOR OF SAID TANK ABOVE SAID BED, A SECOND VALVE SEAT FORMED AT THE JUNCTION OF SAID PASSAGE AND SAID FIRST CHAMBER, A FIRST VALVE MEMBER MOVABLE IN SAID FIRST CHAMBER BETWEEN SAID VALVE SEATS, A FLUID PRESSURE RESPONSIVE AREA ON SAID FIRST VALVE MEMBER FOR MOVING ITS SELECTIVELY BETWEEN SAID SEATS, SAID VALVE STRUCTURE FURTHER INCLUDING AN INLET PORT COMMUNICATING WITH SAID FIRST CHAMBER BETWEEN SAID SEATS AND ARRANGED TO BE CONNECTED TO A SOURCE OF UNTREATED WATER, AND AN OUTLET PORT COMMUNICATING WITH SAID SECOND CHAMBER AND ADAPTED TO BE CONNECTED TO A TREATED WATER SYSTEM, PASSAGE MEANS CONNECTING SAID OUTLET PORT WITH THE INTERIOR OF SAID TREATMENT TANK BELOW SAID BED, A SECOND CONDUIT CONNECTING THE DRAIN MEANS WITH SAID PASSAGE MEANS AND HAVING MEANS FOR SELECTIVELY CONTROLLING DRAINAGE FROM THE TANK, MEANS FOR CLOSING SAID PASSAGE MEANS TO STOP THE FLOW OF WATER THERETHROUGH WHEN SAID TREATMENT TANK IS BEING DRAINED AND INCLUDING A VALVE SEAT MEMBER SEPARATELY OPERABLE THEREIN AND A SECOND VALVE MEMBER SEPARATELY OPERABLE FROM SAID FIRST VALVE MEMBER AND HAVING A VALVE STEM EXTENDING THEREFROM THROUGH SAID INTERMEDIATE VALVE SEAT AND INTO SAID SECOND CONDUIT, SAID VALVE STEM HAVING DRAINAGE-FLOW RESPONSIVE MEANS THERETO MOVE THE VALVE STEM AND THEREBY SAID SECOND VALVE MEMBER ONTO SAID INTERMEDIATE VALVE SEAT, AND AN EJECTOR MOUNTED ON SAID VALVE STRUCTURE AND HAVING A DELIVERY PASSAGE IN COMMUNICATION WITH THE INTERIOR OF THE TREATMENT TANK ABOVE SAID BED AND WITH SAID BRINE TANK CONDUIT AND SAID INLET PORT AND BEING OPERABLE DURING DRAINING OF THE TREATMENT TANK AND CLOSING OF SAID PASSAGE MEANS BY SAID SECOND VALVE MEMBER TO DRAW BRINE INTO SAID TREATMENT TANK TO CIRCULATE THROUGH THE BED OF EXCHANGE MATERIAL.