Gas charging apparatus with check valve

Claim 1

A COMBINATION COMPRISING: A CHARGING GAS CONTAINER TO BE PLACED IN A CHARGED LIQUID CONTAINER; SUPPORT MEANS FOR GAS CONTAINER ATTACHABLE TO SAID LIQUID CONTAINER; AN AUTOMATIC PRESSURE REDUCING VALVE IN SAID SUPPORT MEANS WITH A VALVE INLET RECEIVING CHARGING GAS FROM SAID GAS CONTAINER AND HAVING A VALVE OUTLET TO DISCHARGE REDUCED PRESSURE GAS INTO THE SURROUNDING SPACE WITHIN SAID LIQUID CONTAINER WHICH IS OUTSIDE SAID GAS CONTAINER; A CHARGING GAS RESTRICTOR MEANS RESTRICTING THE FLOW OF CHARGING GAS TO SAID VALVE INLET; A REDUCED PRESSURE GAS PASSAGEWAY IN SAID SUPPORT EXTENDING FROM SAID VALVE OUTLET AND HAVING A CYLINDRACEOUS EXTENSION INTO SAID SURROUNDING SPACE; AND A CHECK VALVE IN THE FORM OF A FLEXIBLE, RUBBER-LIKE CYLINDRACEOUS TUBE HAVING A CYLINDRACEOUS SIDE WALL, A CLOSED END AND AN OPEN END OVER SAID EXTENSION, AN UPPER PORTION OF SAID SIDE WALL SURROUNDING SAID EXTENSION AND A LOWER PORTION OF SAID SIDE WALL EXTENDING BELOW SAID EXTENSION, SAID LOWER PORTION OF SAID SIDE WALL HAVING SLIT MEANS BELOW SAID CYLINDRACEOUS EXTENSION WHICH OPENS WHEN PRESSURE IN SAID TUBE IS GREATER THAN THE PRESSURE OUTSIDE SAID TUBE, AND CLOSES WHEN THE PRESSURE OUTSIDE SAID TUBE IS GREATER THAN THE PRESSURE INSIDE SAID TUBE.