Sampling valve

Claim 1

APPARATUS FOR INTRODUCING A SAMPLE FLUID INTO A FLOWING STREAM OF A CARRIER GAS COMPRISING IN COMBINATION; A FIRST VALVE, SAID VALVE COMPRISING A VALVE BODY WITH INTERIOR WALLS DEFINING A CAVITY THEREIN, A FLEXIBLE DIAPHRAGM LOCATED IN SAID CAVITY AND FIXEDLY ATTACHED TO THE WALLS THEREOF, A FIRST INLET PORT TO SAID CAVITY ON SAID SIDE OF SAID DIAPHRAGM, SECOND AND THIRD INLET PORTS TO SAID CAVITY ON THE OTHER SIDE OF SAID DIAPHRAGM, A FIRST VENTING PORT FROM SAID CAVITY ON SAID FIRST SIDE OF SAID DIAPHRAGM, A SECOND VENTING PORT FROM SAID CAVITY ON SAID OTHER SIDE OF SAID DIAPHRAGM, A PASSAGEWAY EXTENDING THROUGH SAID BODY, NORMALLY BLOCKED FLUID CONDUCTING MEANS HAVING ONE END OPENING INTO SAID PASSAGEWAY AND THE OTHER END OPENING INTO SAID CAVITY ON SAID ONE SIDE OF SAID DIAPHRAGM, SAID DIAPHRAGM WHEN IN A FIRST POSITION BLOCKING SAID SECOND AND THIRD INLET PORTS AND SAID SECOND VENTING PORT AND WHEN IN A SECOND POSITION BLOCKING SAID FIRST INLET PORT AND SAID FIRST VENTING PORT; A FIRST CONDUIT FOR SUPPLYING SAMPLE FLUID TO SAID FIRST INLET PORT WHEN SAID DIAPHRAGM IS IN SAID FIRST POSITION; A SECOND CONDUIT FOR SUPPLYING SAMPLE FLUID TO SAID SECOND INLET PORT WHEN SAID DIAPHRAGM IS IN SAID SECOND POSITION; A SOURCE OF HIGH PRESSURE GAS; A THIRD CONDUIT FOR SUPPLYING SAID HIGH PRESSURE GAS TO SAID THIRD INLET PORT; A SECOND VALVE LOCATED IN SAID THIRD CONDUIT FOR CONTROLLING THE SUPPLY OF SAID HIGH PRESSURE GAS TO SAID THIRD INLET PORT; A FOURTH CONDUIT FOR SUPPLYING A STREAM OF CARRIER GAS TO SAID PASSAGEWAY; SAID DIAPHRAGM BEING IN SAID FIRST POSITION WHEN SAID SECOND VALVE PREVENTS HIGH PRESSURE GAS FROM BEING SUPPLIED TO SAID THIRD INLET PORT; SAID DIAPHRAGM BEING MOVED TO SAID SECOND POSITION WHEN SAID SECOND VALVE PREVENTS HIGH PRESSURE GAS TO BE SUPPLIED TO SAID THIRD INLET PORT; MOVEMENT OF SAID DIAPHRAGM FROM SAID FIRST POSITION TO SAID SECOND POSITION CAUSING THE UNBLOCKING OF SAID FLUID CONDUCTING MEANS WHEREBY THE SAMPLE FLUID PRESENT IN SAID CAVITY ON SAID ONE SIDE OF SAID DIAPHRAGM IS EXHAUSTED INTO SAID PASSAGEWAY; AND A THIRD VALVE IN SAID SECOND CONDUIT FOR CONTROLLING THE SUPPLY OF SAMPLE FLUID THROUGH SAID SECOND CONDUIT WHEN SAID DIAPHRAGM IS IN SAID SECOND POSITION AND FOR SELECTIVELY INTERRUPTING FLOW OF SAMPLE FLUID THROUGH SAID SECOND CONDUIT THEREBY TO PERMIT MOVEMENT OF SAID DIAPHRAGM FROM SAID SECOND POSITION BACK TO SAID FIRST POSITION WHEN SAID FLOW OF HIGH PRESSURE GAS IS INTERRUPTED THROUGH SAID THIRD CONDUIT.