Multiway control valves

Claim 1

A CONTROL VALVE COMPRISING, IN COMBINATION: (A) A VALVE CASING FORMED WITH A CAVITY HAVING A PLURALITY OF PORTIONS AND WITH INLET MEANS, TWO CONTROLLED OUTLETS, AND TWO RETURN OUTLET MEANS, SAID INLET MEANS, OUTLETS, AND OUTLETS MEANS COMMUNICATING WITH RESPECTIVE PORTIONS OF SAID CAVITY; (B) TWO PLUNGER MEMBERS IN SAID CAVITY, EACH PLUNGER MEMBER BEING MOVABLE TOWARD AND AWAY FROM A BLOCKING POSITION IN WHICH SAID PLUNGER MEMBER SEALINGLY ENGAGES SAID CASING IN SAID CAVITY FOR SEPARATING A PORTION OF SAID CAVITY COMMUNICATING WITH AN ASSOCIATED CONTROLLED OUTLET FROM ANOTHER PORTION OF SAID CAVITY COMMUNICATING WITH AN ASSOCIATED RETURN OUTLET MEANS; (C) MOTION TRANSMITTING MEANS CONNECTING SAID PLUNGER MEMBERS FOR MOVEMENT OF EACH PLUNGER MEMBER AWAY FROM THE BLOCKING POSITION THEREOF WHEN THE OTHER PLUNGER MEMEBER MOVES TOWARD THE BLOCKING POSITION OF THE SAME, AND FOR MOVEMENT OF EACH PLUNGER MEMBER TOWARD THE BLOCKING POSITION THEREOF WHEN THE OTHER PLUNGER MEMBER MOVES AWAY FROM THE BLOCKING POSITION OF THE SAME; (D) TWO VALVE SEATS INTERPOSED IN SAID CAVITY BETWEEN RESPECTIVE PORTIONS OF SAID CAVITY COMMUNICATING WITH SAID TWO CONTROLLED OUTLETS AND THE PORTION OF SAID CAVITY COMMUNICATING WITH SAID INLET MEANS, EACH VALVE SEAT BEING FORMED WITH A VALVE OPENING; (E) TWO VALVE ELEMENTS MOVABLE IN SAID CAVITY TOWARD AND AWAY FROM RESPECTIVE VALVE CLOSING POSITIONS IN WHICH SAID VALVE ELEMENTS ENGAGE RESPECTIVE VALVE SEATS AND CLOSE THE OPENINGS THEREOF; (F) YIELDABLY RESILIENT MEANS BIASING SAID VALVE ELEMENTS TOWARD THE RESPECTIVE VALVE CLOSING POSITIONS; AND (G) ABUTMENT MEANS ASSOCIATED WITH EACH OF SAID PLUNGER MEMBERS FOR JOINT MOVEMENT, EACH ABUTMENT MEANS ENGAGING ONE OF SAID VALVE ELEMENTS FOR MOVING THE SAME AWAY FROM THE CLOSING POSITION THEREOF, AND FOR THEREBY OPENING COMMUNICATION BETWEEN THE ASSOCIATED CONTROLLED OUTLET AND SAID INLET MEANS WHEN THE ASSOCIATED PLUNGER MOVES IN A DIRECTION TOWARD SAID BLOCKING POSITION THEREOF; AND (H) ACTUATING MEANS FOR ACTUATING SAID MOVEMENT OF SAID PLUNGER MEMBERS.