Liquid dosing device

A dosing device for dispensing liquid from a container, the device comprising:

• (a) a front part having an outlet opening;
• (b) means for providing a chamber in the device rearwardly adjacent the outlet opening, the chamber having a front opening facing the outlet opening of the device;
• (c) an outlet passage for liquid being dispensed to flow from the container to the outlet opening around the chamber;
• (d) an obturator fitting in the chamber and movable therein to a forward position blocking the outlet passage;
• (e) means located in said means for providing a chamber for permitting only a restricted flow of liquid from the container into the chamber behind the obturator to influence the movement of the obturator towards the forward position during dispensing of liquid;
• the means for providing the chamber comprising a fixed chamber wall portion and a rear, movable chamber wall portion which is movable, upon inversion of the container to a dispensing position, to a closed forward condition wherein only said restricted flow of liquid is permitted from the container into the chamber through said means for permitting a restricted flow of liquid and when the container is upright, under gravity to a restoring rearward condition wherein a large aperture is defined between the fixed and movable wall portions enabling rapid draining of liquid from around the obturator.