Valve opening structure

Claim 1

IN A SMALL ARMS WEAPON: MEANS FORMING A CHAMBER FOR CONTAINING FLUID UNDER PRESSURE; A VALVE HAVING A VALVE OPERATING MEMBER ACCESSIBLE EXTERIORLY OF THE CHAMBER; THE PRESSURE OF FLUID IN THE CHAMBER NORMALLY MAINTAINING THE VALVE OPERATING MEMBER IN VALVE CLOSING POSITION; A MOVABLE IMPACT MEMBER ENGAGEABLE WITH THE VALVE OPERATING MEMBER FOR OPENING THE VALVE ONLY UPON SUFFICIENT IMPACT BETWEEN THE VALVE OPERATING MEMBER AND THE IMPACT MEMBER; RESILIENT MEANS URGING THE IMPACT MEMBER TO VALVE OPERATING MEMBER ENGAGING POSITION AND CAPABLE OF STORING ENERGY WHEN SAID IMPACT MEMBER IS RETRACTED FROM ENGAGING POSITION; SAID IMPACT MEMBER HAVING AN ABUTMENT; A MOVABLE LINK; A MOVABLE TRIGGER PIVOTALLY MOUNTING ONE END OF THE LINK; AND A SPRING CONNECTED TO THE LINK AT A PLACE SPACED FROM THE AXIS OF PIVOTAL MOUNTING OF THE LINK TO THE TRIGGER AND URGING THE LINK TOWARD ONE LIMITED ANGULAR POSITION FOR MOVEMENT IN A PATH IN WHICH THE SURFACE OF THE OTHER END OF SAID LINK IS ENGAGEABLE WITH SAID ABUTMENT FOR RETRACTING SAID IMPACT MEMBER UPON RETRACTION OF SAID TRIGGER; SAID SPRING ALSO URGING THE LINK IN ONE DIRECTION ALONG SAID PATH AND URGING SAID TRIGGER TOWARD RELEASED POSITION; THE ABUTMENT MOVING BEYOND THE SAID END SURFACE UPON SUFFICIENT RETRACTION OF SAID TRIGGER FOR TRIPPING SAID IMPACT MEMBER; THE LINK HAVING A SURFACE ADJOINING ITS END SURFACE ENGAGED BY THE ABUTMENT UPON TRIPPING MOVEMENT OF THE IMPACT MEMBER, INTERACTION BETWEEN SAID ADJOINING SURFACE AND SAID ABUTMENT ROTATING THE LINK AWAY FROM SAID ONE LIMITED ANGULAR POSITION; RELEASE OF THE TRIGGER CAUSING SAID ADJOINING SURFACE TO CLEAR SAID ABUTMENT FOR RESETTING THE LINK.