Patent ID: 6109485
Filing Date: 2000-08-29
Classification: B67D,Y10T

Abstract:
A valve assembly for selectively permitting a liquid to be dispensed from a container under gas pressure within said container, said valve assembly comprising:(A) a valve seat;(B) a riser pipe configured for mounting in an opening of said container, said riser pipe having 1) an internal surface, 2) a first end located remote from said opening, and 3) a second end located adjacent to said opening;(C) a dispensing tower, said dispensing tower being positioned radially within said riser pipe and extending at least generally in parallel with said riser pipe, a chamber being formed between said internal surface of said riser pipe and said dispensing tower; and(D) a sealing ring which is positioned within said chamber and which has an internal surface and an external surface; whereinsaid sealing ring is slidable within said chamber 1) from a first position in which said external surface of said sealing ring seals against said valve seat to prevent gas flow through said valve assembly 2) to a second position in which said external surface of said sealing ring is withdrawn from sealing engagement with said valve seat to permit gas flow through said valve assembly, and whereinsaid dispensing tower is slidable independently of said sealing ring 1) from a first position in which said dispensing tower seals against said internal surface of said sealing ring to prevent liquid flow therebetween 2) to a second position in which said dispensing tower is withdrawn from sealing engagement from said internal surface of said sealing ring to permit liquid flow therebetween.