Liquid gas filling valve

Claim 1

IN A VALVE FOR FILLING A CONTAINER WITH LIQUEFIED GAS INCLUDING AN OUTER CASING ADAPTED TO BE SECURED IN AN APERTURE IN THE WALL OF A CONTAINER, AMOVABLE VALVE ELEMENT RECIPROCABLY MOUNTED IN SAID CASING IN RADIAL SPACED RELATIONSHIP THEREWITH FOR MOVEMENT BETWEEN A FIRST AND SECOND POSITION ALONG THE LONGITUDINAL AXIS OF SAID CASING, A FIRST PASSAGE EXTENDING AT LEAST PARTIALLY THROUGH SAID MOVABLE VALVE ELEMENT FOR CONNECTING THE INTERIOR OF SAID CONTAINER TO THE EXTERIOR THEREOF WHEN SAID VALVE ELEMENT IS IN SAID SECOND POSITION, A FIRST ANNULAR GASKET POSITIONED IN SAID CASING IN SEALING ENGAGEMENT AGAINST SAID MOVABLE VALVE ELEMENT WHEN THE LATTER IS IN SAID FIRST POSITION TO SEAL SAID FIRST PASSAGEWAY, THE IMPROVEMENT COMPRISING: (A) A SECOND ANNULAR GASKET POSITIONED WITHIN SAID CASING AT A LOCATION SPACED FROM SAID FIRST GASKET ALONG THE LONGITUDINAL AXIS OF SAID CASING; (B) A SECOND PASSAGE EXTENDING THROUGH SAID CASING AT A LOCATION DISPOSED BETWEEN SAID GASKETS AND EXTENDING TO THE EXTERIOR OF SAID CONTAINER FOR CONNECTING THE INTERIOR THEREOF TO THE EXTERIOR WHEN SAID VALVE ELEMENT IS IN SAID SECOND POSITION; AND (C) A RING MEMBER POSITIONED WITHIN SAID CASING BETWEEN SAID GASKETS AND IN ENGAGEMENT THEREWITH WHEN SAID VALVE ELEMENT IS IN SAID FIRST POSITION TO NORMALLY HOLD SAID SECOND GASKET IN A POSITION SEALING SAID SECOND PASSAGE, SAID RING MEMBER BEING MOVABLE RELATIVELY AWAY FROM AT LEAST ONE OF SAID GASKETS UPON MOVEMENT OF SAID VALVE ELEMENT TO SAID SECOND POSITION TO OPEN SAID SECOND PASSAGE.