Patent ID: 8403185

Claim:
A pouring spout for a liquid-storage container, the pouring spout comprising: an inlet tube detachably connectable to the liquid-storage container; an outlet tube slideably connected to the inlet tube for guiding a liquid from the inlet tube to a receiving container or tank; a liquid duct that is part of both the inlet tube and the outlet tube and through which the liquid can flow out of the liquid-storage container; an air duct that is part of both the inlet tube and the outlet tube and through which air can enter the liquid-storage container; a valve system for opening the liquid duct and the air duct when the outlet tube is slideably moved relative to the inlet tube, the valve system separately opening the liquid duct and the air duct into the liquid-storage container; and an internal spring keeping the valve system into a closed position unless the outlet tube is slideably moved relative to the inlet tube; wherein the outlet tube is slideably mounted externally onto the inlet tube and the valve system consists of a single piece of elongated form that is slideably mounted internally within the inlet tube, said piece having one end that is rigidly connected to the outlet tube so as to be moved with the outlet tube relative to the inlet tube and that is divided into several longitudinal sections by means of radial walls so as to complete the liquid duct and the air duct of the outlet tube, said piece also having an opposite end shaped so as to act as a closing wall, said other end having a portion that is in line with the air duct and being of an angled hollow shape and provided with a narrow rectangular opening that permits a clear gradual opening of the air duct separately from the opening of the liquid duct when the piece is pushed by the outlet tube within the liquid-storage container in order to open the liquid-storage container.