Means for exiting a fluid from a compartment

Claim 1

A FLUID RELEASING MEANS, COMPRISING IN COMBINATION: A HOUSING HAVING A WELL FORMED IN ITS UPPER AREA AND A CAVITY FORMED IN ITS LOWER AREA, SAID HOUSING HAVING A BORE FORMED THEREIN EXTENDING BETWEEN SAID WELL AND SAID CAVITY, A VALVE SEAT AT THE UPPER END OF SAID WELL, A SUPPLY CONDUIT OPERABLE TO TRANSMIT FLUID FROM A SOURCE EXTERNAL SAID HOUSING, THROUGH SAID VALVE SEAT INTO SAID WELL AT TIMES, A VALVE NORMALLY CLOSING SAID VALVE SEAT TO BLOCK THE PATH OF FLUID INTO SAID WELL AT TIMES, SAID HOUSING HAVING A SINGLE DISCHARGE PORT FORMED THEREIN FOR COMMUNICATING SAID WELL TO THE ATMOSPHERE, INTERMEDIATE THE LENGTH THEREOF, A ROD SLIDABLY EXTENDED THROUGH SAID BORE FROM SAID CAVITY TO SAID WELL; AND BEING MOVABLE TO RAISED AND LOWERED POSITIONS WITH RESPECT TO SAID CAVITY, SAID ROD ENGAGEABLE WITH SAID VALVE TO DISLODGE IT FROM SEATING ENGAGEMENT WITH SAID VAVLE SEAT WHEN IN A RAISED POSITION, A PISTON VALVE ON SAID ROD, SLIDABLE IN SAID WELL BELOW SAID DISCHARGE PORT WHEN SAID ROD IS IN A LOWERED POSITION, AND MEANS OPERABLE WITHIN SAID CAVITY TO SLIDABLY RECIPROCATE SAID ROD BETWEEN ITS RAISED AND LOWERED POSITIONS, SAID PISTON VALVE OPERABLE TO SIMULTANEOUSLY CLOSE SAID DISCHARGE PORT WHEN SAID ROD DISLODGES SAID VALVE FROM ITS SEATING ENGAGEMENT WITH SAID VALVE SEAT THEREBY CAUSING SAID WELL TO BE IN COMMUNICATION ONLY WITH SAID SUPPLY CONDUIT AND BEING OPERABLE TO SIMULTANEOUSLY OPEN SAID DISCHARGE PORT WHEN SAID ROD MOVES TO ITS LOWERED POSITION TO PERMIT SAID VALVE TO ENGAGE SAID VALVE SEAT THEREBY CAUSING SAID WELL TO BE IN COMMUNICATION ONLY WITH THE ATMOSPHERE THROUGH SAID DISCHARGE PORT.