A single-service package coupling and valve includes a fitment having a spout and a sliding tubular valve member mounted therein for receiving a cooperating dispensing connector of a liquid distributing and dispensing system, and an external adapter ring designed to cooperate with the mounting mechanisms...http://www.google.fr/patents/US6347785?utm_source=gb-gplus-shareBrevet US6347785 - Universal quick-disconnect coupling and valve
