Insertable, self-locking and non-refillable closure for bottles

Claim 1

A CLOSURE FOR A CONTAINERS HAVING A NECK, COMPRISING A CASING ADAPTED TO BE INSERTED IN SAID NECK, AND A COVER MEMBER COOPERATING WITH THE OUTER END OF SAID CASING TO FORM A VALVE HOUSING HAVING INLET AND OUTLET OPENINGS PROVIDED RESPECTIVELY AT OPPOSITE ENDS THEREOF, VALVE MEANS AND SPHERICAL WEIGHTED MEANS FREELY MOVABLE IN SAID HOUSING, AND MEANS FOR SECURING THE HOUSING TO THE CONTAINER NECK, SAID COVER MEMBER BEING FORMED TO INCLUDE A GUARD PLATE GREATER IN DIAMETER THAN SAID OUTLET OPENING, AND BEING ATTACHED TO BUT SPACED FROM THE UNDER SURFACE OF THE COVER MEMBER AND FROM THE SURROUNDING INNER WALLS OF THE CASING, TO PROVIDE FOR THE PASSAGE OF THE LIQUID CONTENTS OF THE CONTAINER AROUND THE EDGE OF SAID PLATE AND BETWEEN THE PLATE AND THE COVER MEMBER, AND ON THROUGH SAID OUTLET OPENING, A PLURALITY OF LUGS DEPENDING FROM SAID GUARD PLATE HAVING THEIR OPPOSED INSIDE SURFACES INCLINED OUTWARDLY IN A DIRECTION AWAY FROM SAID PLATE AND TOWARD THE BOTTOM OF SAID CASING, THE COVER MEMBER, THE PLATE AND THE LUGS BEING INTEGRALLY FORMED AS A ONE-PIECE STRUCTURE, AND THE LUGS BEING RELATIVELY POSITIONED IN SPACED RELATION TO DEFINE A POCKET FOR RECEIVING THE SPHERICAL WEIGHTED MEANS WHEN THE CONTAINER IS INVERTED.