Liquid product dispenser

Claim 1

A hand dispenser for a liquid, in combination, comprising: a base, a closed container mounted on said base for storing said liquid, said container having a discharge port, said container being vertically movable between a first lowered position and a second raised position, said discharge port being closed in said first position and open in said second position, passage means for discharging said liquid contained in said container to the atmosphere, said passage means being connected to said discharge port at one end and having a dispensing orifice at the other end, said dispensing orifice being positioned outside of said dispenser, means for manually ejecting a portion of said liquid from said container into said passage means and to the atmosphere, means for lowering the liquid level in said container and creating a lower pressure in said container above the liquid level than exists in the atmosphere after the ejection of said portion of said liquid, whereby when the portion of the liquid is ejected from teh dispenser, atmospheric pressure prevents the remaining liquid in the container and in the passage means from passing to the atmosphere, said hand dispenser further including a cylinder mounted to said base, said cylinder forming a closed chamber having an open side disposed beneath and forming a liquid passage with said discharge port, said cylinder being capable of receiving the bottom portion of the container, thread means formed by the chamber and the container for allowing rotation and raising and lowering of the container in said chamber between said first and second positions, the thread means forming a substantially sealed interconnection between said cylinder and said container, a neck member connected to the bottom of said container, said neck member forming a connecting passage between said container and said chamber, said neck member being smaller in cross-sectional area than the bottom of said container, said thread means forming by said container being mounted on said neck member, said discharge port including a peripheral edge disposed at the bottom portion of said neck member, said cylinder including a bottom wall, said peripheral edge being in substantially sealed alignment with said bottom wall when said container is in said first position, and being removed from said bottom wall when said container is in said second position, a raised ring portion connected to said bottom wall of said cylinder, said raised ring portion being capable of being in sealing alignment with the inner surface of said neck when said container is in said first position, whereby said discharge port is sealed around the periphery of the port in the first position, a duct extension member disposed at the bottom of said neck member, said discharge port being positioned at the bottom of said duct member, said duct member having a smaller cross-sectional area than said container, said discharge port being disposed at the bottom of said duct member, said discharge port being formed by edge portions of the bottom of said duct member, and a discharge spout connected to said cylinder chamber and extending through said base, said spout including said dispensing orifice and an opposed inner orifice positioned in the side wall of said chamber and spaced above the bottom wall of said chamber.