Controlled liquid dispensing system

Claim 1

IN AN APPARATUS FOR TRANSFERRING VOLATILE LIQUIDS INTO A CONTAINER AND COLLECTING EVOLVED VAPOR THEREFROM WITHOUT LOSS TO THE ATMOSPHERE WHICH COMPRISES A SEGMENTED LOADING ARM CONDUIT INCLUDING A FIST, A SECOND, AND A THIRD CONDUIT SECTION SERIALLY CONNECTED BY MEANS OF CONDUIT SWIVELS, SAID SECOND AND THIRD CONDUIT SECTIONS BEING ADAPTED THEREBY TO BE RAISED AND LOWERED, A VAPOR COLLECTING HEAD SURROUNDING SAID THIRD CONDUIT SECTION AND ADAPTED TO BE SEALED AGAINST OPENING OF SAID CINTAINER, A FLEXIBLE CONDUIT FOR VAPOR OPENING FROM SAID HEAD AND EXTENDING BACK ALONG SAID SEGMENTED LOADING ARM, AND A MAIN FLOW CONTROL VALVE CONNECTED IN SAID SECOND CONDUIT SECTION, THE IMPROVEMENT IN COMBINATION THEREWITH WHICH COMPRISES A PNEUMATIC CYLINDER HAVING A PISTON AND PISTON ROD DISPOSED ADJACENT SAID CONTROL VALVE, SAID PISTON ROD BEING CONNECTED SO AS TO ACTUATE SAID CONTROL VALVE, A LOADING SPRING BIASING SAID PISTON INTO AN EXTREME POSITION IN SAID CYLINDER AT WHICH SAID CONTROL VALVE IS CLOSED, SAID CYLINDER HAVING A FLUID MANIFOLD DISPOSED, SAID INTERMEDIATE PORTION THEREOF WHICH OPENS THROUGH AT LEAST ONE PORT INTO SAID CYLINDER, A PRESET COUNTER CONNECTED TO A METER WHICH IS ACTUATED BY THE VOLUME OF LIQUID DE LIVERED THROUGH SAID LOADING ARM, A PILOT VALVE CONNECTED TO AND ACTUATED BY THE SAID PRESET COUNTER CONNECTED TO CONDUIT FOR A CONTROL FLUID UNDER PRESSURE OPENING INTO SAID PILOT VALVE, A VENT CONDUIT OPENING THEREFROM, A FIRST CONTROL CONDUIT CONNECTING SAID PILOT VALVE TO AN END PORT OF SAID CYLINDER, A SECOND CONTROL CONDUIT CONNECTING SAID PILOT VALVE TO SAID FLUID MANIFOLD, AND A VENT PORT CONDUIT OPENING FROM THE OTHER END PORT OF SAID CYLINDER, SAID PRESET COUNTER BEING ADAPTED TO ACTUATE SAID PILOT VALVE SO AS TO SUPPLY AIR TO SAID CYLINDER AND OPEN SAID CONTROL VALVE UNTIL ALL BUT A MINOR AMOUNT OF A PRESET LIQUID VOLUME HAS BEEN DELIVERED, THEN VENT SAID INTERMEDIATE PORT SO AS TO PERMIT SAID LOADING SPRING TO BRING SAID PISTON INTO AN INTERMEDIATE POSITION ADJACENT SAID PORT SO AS TO CLOSE PARTIALLY SAID MAIN CONTROL VALVE WHILE SAID MINOR AMOUNT OF LIQUID IS DELIVERED AT A REDUCED RATE, AND THEN VENT ALL CYLINDER PORTS TO SPRING CLOSE SAID CONTROL VALVE.