Liquid measuring and dispensing device

Claim 1

A LIQUID MEASURING AND DISPENSING DEVICE COMPRISING A TUBULAR HOUSING ADAPTED TO BE CONNECTED TO A SOURCE OF LIQUID UNDER PRESSURE, A DISCHARGE NOZZLE IN FLUID COMMUNICATION WITH SAID HOUSING, A PISTON RECIPROCABLY POSITIONED IN SAID HOUSING, MEANS POSITIONED IN SAID HOUSING FOR NORMALLY URGING SAID PISTON DOWNWARDLY, BY-PASS MEANS IN SAID HOUSING FOR DIVIDING SAID LIQUID INTO TWO STREAMS SO THAT ONE STREAM ENTERS SAID HOUSING BELOW SAID PISTON AND THE OTHER STREAM ENTERS SAID HOUSING ABOVE SAID PISTON, FIRST VALVE MEANS IN SAID HOUSING FOR NORMALLY ADMITTING SAID OTHER STREAM OF LIQUID INTO SAID HOUSING, SAID FIRST VALVE MEANS INCLUDING A RECIPROCABLE PLUNGER FOR CLOSING THE SAME WHEN MOVED DOWNWARDLY, SECOND VALVE MEANS IN SAID HOUSING FOR NORMALLY CLOSING THE FLUID COMMUNICATION BETWEEN SAID BODY AND SAID DISCHARGE NOZZLE, SAID SECOND VALVE MEANS INCLUDING A RECIPROCABLE PLUNGER FOR OPENING THE SAME WHEN MOVED DOWNWARDLY, ACTIVATING MEANS ON SAID HOUSING FOR REVERSING THE NORMAL CONDITION OF SAID FIRST AND SECOND VALVE MEANS WHEREBY THE PRESSURE OF SAID ONE STREAM OF LIQUID FORCES SAID PISTON UPWARDLY TO DISPENSE THE LIQUID THEREABOVE OUT OF SAID DISCHARGE NOZZLE, SAID ACTIVATING MEANS COMPRISING A LEVER PIVOTALLY MOUNTED AT ONE END THEREOF ON SAID HOUS-