Patent ID: 6112919
Filing Date: 2000-09-05
Classification: A61J

Abstract:
A leakage preventive device for use on a bottle having a teat for the purpose of preventing liquid in the bottle from leaking out, which comprises:a mounting device disposed between the bottle and the teat, the mounting device including a cylindrical body having a hollowed inside serving as a passage for the liquid contained in the bottle; and,an elastic valve member mounted on the mounting device, the elastic valve member having an outer wall, which is fitted tightly to an outer wall of the cylindrical body of the mounting device and a substantially U-shaped inner ring, which is linked to the outer wall of the valve member; a top face of the elastic valve member which is formed with at least one vent which allows the liquid passing through the hollowed inside of the cylindrical body of the mounting device to pass therethrough to a hole of the teat, the U-shaped inner ring being made from an elastic material, urging the U-shaped inner ring forcibly against an inner wall of the cylindrical body when the teat is not being sucked, the U-shaped inner ring having an open end to define a chamber communicating with the teat;wherein when the teat is being sucked, it causes a negative air pressure within the chamber to cause the U-shaped inner ring to be compressed inwards, thereby forming a gap between the U-shaped inner ring and the inner wall of the cylindrical body to allow the liquid in the bottle to flow therethrough to the teat.