초록 ▼

A non-refillable pour spout, for use in the neck of a bottle to prevent introduction of liquid into the bottle but permit liquid already within the bottle to be poured from the bottle in any direction, includes a pair of check valves in a liquid pouring duct and a third check valve in a separate air

A non-refillable pour spout, for use in the neck of a bottle to prevent introduction of liquid into the bottle but permit liquid already within the bottle to be poured from the bottle in any direction, includes a pair of check valves in a liquid pouring duct and a third check valve in a separate air entry conduit which extends through the pour spout alongside the liquid pouring duct. The pour spout fits within the neck of a bottle, where it is retained sealingly by a plurality of flexible collars extending about the circumference of the pourer spout. A horizontal flange extends radially about the upper end of the liquid discharge tube, a small distance above the upper end of the air entry vent conduit, to protect the air entry vent conduit against introduction of liquid and to permit liquid to be poured in any direction without spilling into the open end of the air entry conduit. A valve closure body in one of the check valves in the liquid pouring duct is less dense than the liquid for which the valve is intended to be used.

대표청구항 ▼

A non-refillable pour spout, for use in the neck of a bottle for permitting liquid to be poured through said spout from within said bottle but resisting replenishment of the liquid in said bottle, comprising: (a) a generally cylindrical spout body member having a top and bottom and adapted to fit se

A non-refillable pour spout, for use in the neck of a bottle for permitting liquid to be poured through said spout from within said bottle but resisting replenishment of the liquid in said bottle, comprising: (a) a generally cylindrical spout body member having a top and bottom and adapted to fit sealingly within the neck of a bottle; (b) a liquid pouring duct extending through said spout body member and including discharge tube means for defining a liquid discharge opening adjacent the top of said spout body member; (c) a first check valve located in said liquid pouring duct in said spout body member, including a first valve seat and a movable first valve closure body held within said spout body upwardly adjacent said first valve seat, said first check valve communicating with said discharge tube means; (d) a second check valve located in said liquid pouring duct in said spout body member, including a second valve seat and a movable second valve closure body held within said spout body upwardly adjacent said second valve seat, said second check valve being located beneath said first check valve and communicating with said first check valve; (e) an air inlet tube attached to said spout body member and having a lower end extending downwardly therebeneath; (f) an air inlet conduit having an open upper end located in said top of said spout body member, said air inlet conduit extending through said spout body member and said air inlet tube, from said top of said spout body member to said lower end of said air inlet tube; and (g) a third check valve located in said air inlet conduit, including a valve seat and a movable third valve closure body held within said air inlet conduit and located upwardly adjacent said third valve seat.