Liquid gas distribution apparatus

Claim 1

A CONDUIT COUPLING FOR ATTACHMENT TO ACCESS CHECK VALVES IN LOW TEMPERATURE LIQUEFIABLE GAS VESSELS, EACH OF SAID CHECK VALVES HAVING AN OUTER SEAT, AN INNER SEAT OPERABLY ASSOCIATED WITH A DISPLACEABLE VALVE CHECK MEMBER NORMALLY URGED INTO FLUID SEALING RELATIONSHIP WITH THE INNER SEAT BY INTERNAL VESSEL PRESSURE, SAID CONDUIT COUPLING COMPRISING A TUBULAR ATTACHING MEMBER TERMINATING IN AN ELONGATED NIPPLE, SAID ATTACHING MEMBER ENGAGING SAID CHECK VALVE AND URGING SAID ELONGATED NIPPLE INTO FLUID SEALING RELATION WITH THE OUTER SEAT OF THE CHECK VALVE, A VALVE STEM CO-AXIAL WITH AND SLIDEABLY RETAINED IN SAID NIPPLE TO MOVE FORWARD WHEN SO URGED TO DISPLACE THE CHECK MEMBER FROM THE INNER SEAT OF THE CHECK VALVE, RESILIENT MEANS URGING SAID STEM REARWARDLY IN SAID NIPPLE FOR NORMALLY SPACING THE FORWARD END OF SAID STEM AWAY FROM THE CHECK MEMBER, AT LEAST ONE GUIDE PIN LATERALLY PROJECTING FROM SAID VALVE STEM, SAID PIN SLIDEABLY RETAINED IN A CORRESPONDING SLOT IN SAID NIPPLE, SAID SLOT DISPOSED TO PERMIT SUFFICIENT FORWARD MOVEMENT OF SAID VALVE STEM WHEN URGED FORWARD AGAINST THE RESILIENT MEANS TO INWARDLY DISPLACE THE CHECK MEMBER FROM THE INNER SEAT, A FORWARD PORTION OF SAID SLOT BEING FORMED TO PERMIT A LIMITED ROTATION OF THE VALVE STEM AND LOCKING OF SAID GUIDE PIN IN SAID FORWARD POSITION, A FLUID PASSAGE EXTENDING AXIALLY OF SAID VALVE STEM TO FORM A COMMUNICATING PASSAGE FOR GAS FLOW FROM THE INTERIOR OF THE VESSEL THROUGH AND OUT OF THE VALVE STEM INTO A FLUID CONDUIT WHEN THE VALVE STEM IS RETAINED IN THE FORWARD POSITION.