Patent ID: 8701942

Claim:
A disposable dispensing system, comprising: a collapsible container for liquid material; and a pump being sealingly connected to the collapsible container, the pump being configured for withdrawal of liquid material from the container during collapse thereof, the pump comprising a housing forming a chamber and a dispensing opening, wherein the pressure in the chamber may be varied for pumping liquid from the container to the chamber, and further from the chamber to the dispensing opening, and a regulator fixedly arranged in the chamber, the regulator comprising an inner valve for regulating a flow of liquid between the container and the chamber, an outer valve for regulating a flow of liquid between the chamber and the dispensing opening, and a stem extending in a straight, single longitudinal extension between the inner valve and the outer valve, wherein the pump is configured to assume a closed position, in which a volume of liquid is drawn from the container to the chamber by a negative pressure created in the chamber, and a dispensing position, in which a volume of liquid is drawn from the chamber to the dispensing opening, wherein the regulator and the housing are made of a resilient material and the regulator and the housing are configured to automatically reassume their original shapes, thereby returning the pump from said dispensing position to said closed position, and the container is a semi-rigid collapsible container, having one rigid longitudinal half and one compressible longitudinal half such that, during emptying, the compressible longitudinal half will conform to the rigid longitudinal half, and wherein when the regulator assumes an original shape, the outer valve is in a symmetrical position in the chamber, corresponding to the closed position of the pump; and when the regulator assumes a distorted shape, the outer valve is in a tilted position in the chamber, corresponding to the dispensing position of the pump, a center of the outer valve being closer to a wall of the chamber when the outer valve is in the tilted position relative to when the outer valve is in the symmetrical position.