A spigot for association with a spout connected to a container, the spigot including a cylindrical portion to fit over the end of the spout, a diaphragm for engaging the end of the spout to prevent flow of liquid, a toggle member for deflecting the diaphragm and an opening through the cylindrical portion...http://www.google.es/patents/US5000359?utm_source=gb-gplus-sharePatente US5000359 - Sealed spigot
