Vented spout for a liquid storage container

A vented pouring spout for a liquid-storage container, the spout including:

• a first member including:
• an elongated and generally tubular first main body having a front section and a rear section, the first main body having two segregated and parallel internal passageways, one being an air duct through which an air circuit passes when air enters the container and one being a liquid duct through which a liquid circuit passes when the liquid flows out of the container, the air duct being generally positioned along a top side of the first main body and being smaller in cross section than that of the liquid duct, the liquid duct being substantially straight and substantially unobstructed along the entire first main body, the air duct being substantially straight and substantially unobstructed along the entire first main body up to at least one constricted opening, generally positioned at a rear end of the first main body, from which the air circuit exits the air duct;
• a valve that is juxtaposed to the rear end of the first main body, the valve having a rear section and a front tapered section extending from the rear section, the rear section of the valve supporting a valve gasket and the front tapered section being made integral with the rear section of the first main body, the front tapered section being adjacent to an inlet of the liquid duct and to the at least one constricted opening;
• and
• a first bottom protrusion projecting underneath the front section of the first main body;
• a second member that is shorter in length than the first member, the second member including an elongated second main body, the second main body having a straight tubular inner conduit inside which the rear section of the first main body is slidingly axially movable, the inner conduit having a rear end defining a valve seat that is engaged by the valve gasket when the valve is in a closed position to block the air circuit and the liquid circuit, the valve gasket being out of engagement with the valve seat and being positioned rearward of the valve seat when the valve is in a fully-opened position;
• an inner gasket provided between the first member and the second member to seal in an air-tight manner an intervening peripheral space between the rear section of the first main body and the inner conduit of the second main body;
• and
• a biasing element positioned between the first member and the second member to urge the valve in the closed position.