Pilot operated 3-way in-line valve

Claim 1

A PILOT OPERATED THREE-WAY, AIR VALVE COMPRISING: (A) A BODY HAVING AN EXHAUST CHAMBER, A CLYINDER CHAMBER, A PRESSURIZED AIR SUPPLY CHAMBER, AND, A SEPARATE INLET PORT CONNECTED TO EACH OF SAID CHAMBERS, (B) SAID CHAMBERS BEING VERTICALLY ALIGNED WITH THE EXHAUST CHAMBER BEING DISPOSED ABOVE SAID CYLINDER CHAMBER AND THE SUPPLY CHAMBER BEING DISPOSED BELOW SAID CYLINDER CHAMBER, (C) A PILOT HOUSING ON SAID BODY HAVING A PILOT CHAMBER COMMUNICATING WITH SAID EXHAUST CHAMBER, (D) A FIRST WALL BETWEEN SAID EXHAUST CHAMBER AND SAID CYLINDER CHAMBER, (E) A SECOND WALL BETWEEN SAID CYLINDER CHAMBER AND SAID SUPPLY CHAMBER, (F) SAID FIRST WALL HAVING A FIRST CIRCULAR OPENING THERETHROUGH TO CONNECT SAID EXHAUST CHAMBER TO SAID CYLINDER CHAMBER, AND, A HORIZONTAL POPPET VALVE SEAT AROUND THE UPPER SIDE OF SAID FIRST OPENING, (G) SAID SECOND WALL HAVING A SECOND CIRCULAR OPENING THERETHROUGH, EQUAL IN DIAMETER TO THE DIAMETER OF SAID FIRST CIRCULAR OPENING, TO CONNECT SAID CYLINDER CHAMBER TO SAID SUPPLY CHAMBER, AND, A RADIAL VERTICAL VALVE SEAT AROUND THE PERIPHERY OF SAID SECOND OPENING, (H) A MASTER SPOOL VALVE MOVABY MOUNTED IN SAID BODY AN EXTENDED THROUGH SAID EXHAUST, CYLINDER AND SUPPLY CHAMBERS, AND HAVING A PILOT PORTION EXTENDED INTO SAID PILOT CHAMBER, (I) SAID MASTER SPOOL VALVE HAVING A PAIR OF LONGITUDINALLY SPACED APART ALTERNATELY OPERABLE FLEXIBLE RADIAL SEAL VALVE MEMBERS, A FIRST ONE OF SAID VALVE MEMBERS BEING RADIALLY FORMED TO SEAT ON SAID RADIAL VERTICAL VALVE SEAT TO BLOCK COMMUNICATION BETWEEN THE CYLINDER CHAMBER AND THE SUPPLY CHAMBER, AND A SECOND ONE OF SAID VALVE MEMBERS BEING FORMED TO SEAT ON SAID HORIZONTAL VALVE SEAT TO FUNCTION AS A POPPET VALVE HAVING A SEALING DIAMETER EQUAL TO THE SEALING DIAMETER OF SAID RADIALLY FORMED VALVE MEMBER TO BLOCK COMMUNICATION BETWEEN THE CYLINDER CHAMBER AND THE EXHAUST CHAMBEER, (J) MEANS FOR NORMALLY BIASING SAID MASTER SPOOL VALVE TO A FIRST POSITION WITH SAID FIRST VALVE MEMBER BEING OPERATIVE TO BLOCK COMMUNICATION BETWEEN THE CLYINDER CHAMBER AND THE SUPPLY CHAMBER AND TO COMMUNICATE THE CYLINDER CHAMBER WITH THE EXHAUST CHAMBER, AND (K) PILOT MEANS FOR CONVEYING PRESSURIZED AIR INTO SAID PILOT CHAMBER FOR MOVING SAID MASTER SPOOL VALVE TO A SECOND POSITION WITH SAID SECOND VALVE MEMBER BEING OPERATIVE TO BLOCK COMMUNICATION BETWEEN THE CYLINDER CHAMBER AND THE EXHAUST CHAMBER AND TO COMMUNICATE THE CYLINDER CHAMBER WITH THE SUPPLY CHAMBER.