Patent ID: 8365964

Claim:
A pouring spout for pouring liquid from a container while simultaneously aerating the liquid discharged from the spout outlet opening and including a tubular body having a liquid flow path extending longitudinally therethrough and a Venturi constriction located in the flow path and a Venturi air intake opening into the Venturi constriction to aerate the liquid as it flows therethrough, the improvement comprising: a closure member for sealing said outlet opening when said spout is upwardly oriented, said closure member being rotatable to unblock said outlet opening when said spout is tipped to a pouring position, wherein said closure member includes a distal end having a configuration adapted to seal said outlet opening and a proximal end that comprises a counterweight to said distal end in rotation about said pivot shaft, said proximal end includes a loop portion that circumscribes a distal portion of said spout in complementary curved fashion to said distal portion of said spout and is spaced apart therefrom, the closure member further includes a pair of support arms extending from opposed ends of said loop portion to said distal portion of said closure member, said support arms being spaced apart and said distal portion of said spout being disposed between said support arms; a pivot shaft secured to said tubular body exteriorly of said liquid flow path, said pivot shaft extending from said tubular body to pivotally support said closure member; stop means for limiting rotation of said closure member about said pivot shaft when said spout is tipped to the pouring position and preventing said closure member from striking said tubular body, said stop means disposed exteriorly of said liquid flow path wherein said stop means includes at least one stop lug extending outwardly from the exterior surface of said distal portion of said spout and disposed in the rotational path of a portion of at least one of said support arms.