Pressure operated valve, especially for water supply systems

Claim 1

A PRESSURE OPERATED VALVE FOR WATER SUPPLY SYSTEMS OR THE LIKE COMPRISING, A VALVE HOUSING, A PARTITION WALL DIVIDING SAID HOUSING TO DEFINE AN INLET CHAMBER AND AN OUTLET CHAMBER AND HAVING A FIXED VALVE SEAT, A SUPPLY LINE CONNECTED TO SAID INLET CHAMBER AND A MOTOR PUMP CONNECTED TO SAID SUPPLY LINE, A PRESSURE BELL IN COMMUNICATION WITH SAID OUTLET CHAMBER AND MOUNTED ON SAID HOUSING, SAID PRESSURE BELL HAVING A FLEXIBLE WALL PRESENTING A MOVABLE VALVE SEAT, A PRESSURE OPERATED SWITCH HAVING CURRENT SUPPLY CONTACTS MOUNTED ON SAID PRESSURE BELL AND OPERATIVE IN RESPONSE TO THE EXPANSION OF SAID PRESSURE BELL UPON DECREASE OF THE PRESSURE IN SAID OUTLET CHAMBER BELOW A PREDETERMINED VALUE TO CONNECT SAID MOTOR TO SAID CURRENT SUPPLY CONTACTS AND IN RESPONSE TO AN INCREASE OF PRESSURE IN SAID OUTLET CHAMBER ABOVE SAID VALVE TO DISCONNECT SAID CURRENT SUPPLY CONTACTS, A REGULATING VALVE MEMBER EXTENDING THROUGH SAID PARTITION WALL HAVING A PRIMARY VALVE PORTION COOPERATING WITH SAID FIXED VALVE SEAT AND DEFINING A PRIMARY VALVE THEREWITH AND A SECONDARY VALVE PORTION DISPOSED PROXIMATE AND MOVABLE WITH SAID MOVABLE VALVE SEAT, AND DEFINING A SECONDARY VALVE THEREWITH DISPOSED IN PARALLEL RELATIONSHIP TO SAID PRIMARY VALVE PORTION, AND A BY-PASS INTERMEDIATE SAID INLET AND OUTLET CHAMBERS.