Patent ID: 8627970

Claim:
A closure for an opening of a generally cylindrical neck of a vessel, the closure comprising: a stopper configured to seat at least partially within the opening; a shield comprising a recess configured to receive at least a portion of the stopper, the recess being at least partially defined by the inner surface of a skirt configured to be positioned outside the generally cylindrical neck when the stopper is seated in the opening; and a pusher extending radially into the recess from the inner surface of the skirt, the pusher having a distal portion, with respect to the inner surface of the skirt, engaging the stopper and configured to push the stopper out of the opening when the shield is withdrawn axially from the generally cylindrical neck, the pusher being movable between a first position extending axially outward from the inner surface of the skirt and a second position extending axially inward from the inner surface of the skirt.