Pressure stopcock

Claim 1

IN COMBINATION WITH A STOPCOCK COMPRISING A SHELL HAVING A BORE AND A PLUG ROTATABLY RECEIVED IN SAID BORE WITH AN END OF SAID PLUG EXTENDING OUT BEYOND SAID SHELL AND HAVING A CIRCUMFERENTIAL GROOVE THEREIN, A MEMBER HAVING A BODY AND ARMS EXTENDING AXIALLY THEREFROM, MEANS ACTIVE ON SAID ARMS AND RESILIENTLY RESISTING SPREADING THEREOF, SAID PLUG END BEING RECEIVED BETWEEN SAID ARMS AND SAID ARMS HAVING PARTS SNAP ENGAGING IN SAID PLUG GROOVE, SAID MEMBER BEING EXTERNALLY THREADED AT LEAST ALONG SAID ARMS AND HAVING A LATERALLY ENLARGED PORTION AT ITS END OPPOSITE TO SAID ARMS, A NUT THREADEDLY ROTATABLY RECEIVED ON SAID MEMBER AND MOVABLE BETWEEN A FIRST POSITION OVER SAID ARMS ADJACENT SAID GROOVE-ENGAGING PARTS AND A SECOND POSITION REMOTE FROM SAID FIRST POSITION, THEREBY RESPECTIVELY PREVENTING OR PERMITTING SAID ARMS TO SPREAD AND BECOME DISENGAGED FROM SAID PLUG GROOVE, SAID NUT BEING PASSABLE OVER THE ARMS-END OF SAID MEMBER BUT BEING BLOCKED FROM PASSAGE OVER THE BODY-END OF SAID MEMBER BY SAID LATERALLY ENLARGED PORTION, AND MEANS OPERATIVELY BETWEEN SAID SHELL AND SAID NUT FOR URGING SAID PLUG AXIALLY INTO SAID BORE.