Multi-purpose valve device

Claim 1

A MULTI-PURPOSE VALVE DEVICE COMPRISING, IN COMBINATION: (A) A FIRST BODY PORTION HAVING AN UPPER CONTROL CHAMBER AND A LOWER CONTROL CHAMBER INTO AND OUT OF WHICH CHAMBERS PRESSURIZED FLUID MAY BE INTRODUCED AND WITHDRAWN, RESPECTIVELY, (B) PISTON MEANS DISPOSED IN SAID FIRST BODY PORTION AND OPEABLE RESPONSIVELY TO FLUID PRESSURE DIFFERENTIAL BETWEEN THE RESPECTIVE PREVAILING PRESSURE IN SAID UPPER AND LOWER CONTROL CHAMBRS, (C) A SECOND BODY PORTION COAXIALLY SUPPORTED ON SAID FIRST BODY PORTION AND BEING SELECTIVELY ANGULARLY DISPLACEABLE RELATIVE THERETO TO A PLURALITY OF POSITIONS, (D) SAID SECOND BODY PORTION HAVING FORMED THEREIN A PLURALITY OF CHAMBERS INTO AND OUT OF WHICH PRESSURIZED FLUID MAY BE INTRODUCED OR WITHDRAWN, RE SPECTIVELY, INDEPENDENTLY OF EACH OTHER, (1) EACH OF SAID CHAMBERS IN SAID SECOND BODY PORTION ALSO HAVING ASSOCIATED THEREWITH A RESPECTIVE PASSAGEWAY VIA WHICH EACH CHAMBER MAY BE PLACED, SELECTIVELY, AND ONE AT A TIME, IN COMMUNICATION WITH SAID LOWER CONTROL CHAMBER IN SAID FIRST BODY PORTION ACCORDING TO THE ANGULAR POSITION OF SAID SECOND BODY PORTION RELATIVE TO SAID BODY PORTION, (11) WHERENY TO INFLUENCE THE PRESSURE OF FLUID ING SAID LOWER CONTROL CHAMBER ACCORDING TO THAT IN THE CHAMBER CONNECTED THERE TO, AND (E) VALVE MEANS OPERABLY BY SAID PISTON MEANS, IN ONE POSITION, TO PLACE TWO OF SAID CHAMBERS IN SAID SECOND BODY PORTION IN COMMUNICATION WITH EACH OTHER AND, IN A DIFFERENT POSITION, TO CUT OFF SUCH COMMUNCIATION AND OPEN ONE OF SAID TWO CHAMBERS TO ATMOSPHERE.