Patent ID: 8561858
Filing Date: 2013-10-22
Classification: B65D,B67D

Abstract:
1. An auto-vented automatic stop flow pouring spout connectable to a liquid-storage container in order to pour by gravity a liquid stored in the liquid-storage container, the pouring spout having a first end and a second end, the pouring spout including a first tube detachably connectable to the liquid-storage container at the first end of the pouring spout, a second tube slideably connected to the first tube, and a liquid outlet duct and an air inlet duct, both uninterruptedly extending inside the first and second tubes between the first and second ends of the pouring spout, the liquid outlet duct and the air inlet duct being both selectively opened and closed with reference to the liquid-storage container only at the first end of the pouring spout to allow the liquid in the liquid-storage container to flow freely by gravity through the liquid outlet duct and out the second end of the pouring spout while air separately enters into the liquid-storage container via the air inlet duct, the liquid outlet duct and the air inlet duct being both selectively opened and closed with reference to the liquid-storage container by a spring-biased valve system having an open position and a closed position, the air inlet duct, when the valve system is moved from the closed position to the opened position, being initially made in fluid communication with the liquid-storage container only either simultaneously with the liquid outlet duct or immediately after the liquid outlet duct is initially made in fluid communication with the liquid-storage container, thereby preventing the liquid in the liquid-storage container from filling the air inlet duct when the liquid is poured using the pouring spout and minimizing evaporation and permeability of the liquid on internal surfaces inside the pouring spout.