Rotary flow control closure for a container

Claim 1

THE COMBINATION WITH A CONTAINER HAVING A NECK MEMBER, AND A CLOSURE HAVING A SLEEVE MEMBER SURROUNDING SAID NECK MEMBER, OF A MEANS FOR LIMITING RELATIVE MOVEMENT OF SAID MEMBERS, COMPRISING: (A) AN ANNULAR EXTERNAL RIB ON SAID NECK MEMBER FORMING A LATCHING SHOULDER DEFINING A PLANE ESSENTIALLY PERPENDICULAR TO THE AXIS OF SAID NECK MEMBER AND AN AXIALLY SLOPING CAM SURFACE; (B) AN ANNULAR INTERNAL RIB ON SAID SLEEVE MEMBER FORMING A LATCHING SHOULDER DEFINING A PLANE ESSENTIALLY PERPENDICULAR TO THE AXIS OF SAID SLEEVE MEMBER AND AN AXIALLY SLOPING CAM SURFACE; (C) AT LEAST ONE OF SAID MEMBERS BEING YIELDABLE WHEREBY SAID SLEEVE MEMBER MAY BE FORCED AXIALLY OVER SAID NECK MEMBER FOR MUTUAL ENGAGEMENT OF SAID CAM SURFACES UNTIL SAID SHOULDERS ARE MOVED AXIALLY APART FROM EACH OTHER THEREBY TO LOCK SAID SLEEVE MEMBER AGAINST REMOVAL FROM SAID NECK MEMBER; (D) A STOP LUG FORMED ON ONE OF SAID AXIALLY SLOPING CAM SURFACES AND EXTENDING AXIALLY THEREFROM, SAID STOP LUG HAVING ESSENTIALLY RADIALLY EXTENDING STOP SURFACES ON OPPOSITE SIDES THEREOF; (E) AND A CLEARANCE CHANNEL FOR SAID STOP LUG, FORMED IN THE OTHER OF SAID MEMBERS, SAID CLEARANCE CHANNEL BEING INTERRUPTED BY TWO STOP ABUTMENTS, SAID ABUTMENTS HAVING CIRCUMFERENTIALLY SPACED CONFRONTING STOP SHOULDERS DEFINING ESSENTIALLY RADIALLY EXTENDING SURFACES ENGAGEABLE WITH THE CORRESPONDING SURFACES OF SAID STOP LUG TO CONFINE SAID MEMBERS TO RELATIVE MOVEMENT CORRESPONDING TO THE MOVEMENT OF SAID STOP LUG BETWEEN SAID STOP SHOULDERS; (F) SAID STOP ABUTMENTS HAVING CIRCUMFERENTIALLY ELONGATED CAM SURFACES AT THEIR CIRCUMFERENTIALLY REMOTE SIDES; WHEREBY, ON ASSEMBLY OF SAID SLEEVE MEMBER AND SAID NECK MEMBER, SHOULD SAID STOP LUG BE LOCATED OTHER THAN IN THE SPACE BETWEEN THE STOP SHOULDERS OF SAID ABUTMENTS, SAID MEMBERS MAY BE FORCEABLY ROTATED TO PLACE SAID STOP LUG BETWEEN SAID STOP SHOULDERS FOR RETENTION THEREBETWEEN, AND; (G) A RUDIMENTARY BOSS DISPOSED ADJACENT AT LEAST ONE OF SAID STOP SHOULDERS FOR YIELDABLY RETAINING SAID STOP LUG AGAINST MOVEMENT TOWARD THE OTHER STOP SHOULDER.