Valve for pressure gas container

Claim 1

VALVE MEANS FOR A PRESSURE GAS CONTAINER COMPRISING A VALVE MEMBER, A VALVE SEAT OPPOSITE SAID VALVE MEMBER AND A VALVE MEMBER SUPPORT, SAID VALVE MEMBER SUPPORT BEING SUBJECTED TO THE ACTION OF A SPRING WHICH TENDS TO CLOSE SAID VALVE MEMBER AGAINST SAID SEAT TO PREVENT THE ESCAPE OF GAS DURING NORMAL SERVICE WHEN THE PRESSURE OF THE GAS IS BELOW A CERTAIN VALUE, SAID VALVE MEMBER SUPPORT BEING MOVED THROUGH A LOST MOTION CONNECTION BY A SLIDE, SAID SPRING BEARING AT ONE END ON SAID VALVE MEMBER SUPPORT AND AT THE OTHER END ON SAID SLIDE, AND SAID SLIDE BEING CAPABLE OF BEING POSITIONED TO BEAR ON SAID VALVE MEMBER SUPPORT IN THE SENSE OF CLOSING SAID VALVE MEMBER, THE POSITION OF SAID SLIDE DURING NORMAL SERVICE BEING ADJUSTED BY A SCREW WHICH IS ROTATED BY A CONTROL DEVICE AND BEING LIMITED IN THE SENSE OF THE OPENING OF SAID VALVE MEMBER BY ABUTMENT AGAINST A FIRST INTERNALLY AND EXTERNALLY SCREWTHREADED MEANS INTO WHICH THE SAID SCREW IS ENGAGED, SAID FIRST MEANS BEING SCREWED INTO A SECOND INTERNALLY AND EXTERNALLY SCREWTHREADED MEANS WHICH IS SCREWED INTO THE VALVE BODY, SAID SECOND MEANS FORMING AN ABUTMENT FOR THE TRAVEL OF SAID SLIDE WHEN, IN ORDER TO PERMIT OF COMPLETELY EMPTYING THE CONTAINER, SAID FIRST MEANS HAS BEEN SUFFICIENTLY UNSCREWED.