Dispensing device.

摘要

A dispensing device for a bag (4) containing a liquid, made of flexible material and forming upper and lower walls (4a and 4b) through which holes are formed for receiving the device has a tubular lower part (5) with a top flange (6) which is sealed to the inside of the lower wall (4a) and depends through the hole in the lower wall. A tubular upper part (12) has a top flange (14) sealed to the inside of the upper wall (4b) and depends through the hole in that wall and is telescoped inside the lower part (5) so as to move up and down in the lower part (5). The top of the upper part (12) forms a piston such as a collapsible dome extending upwardly through the hole in the upper wall and exposed on the outside of the upper wall and therefore exposed on the outside of the bag (4). The lower part (5) has a lower end having a self-closing valve (8) and has at least one side port (15) normally open to a space between the flanges (6 and 14) and therefore between the bag walls (4a and 4b). The lower part (5) has one or more ports normally open to that space and through which liquid contained by the bag (4) can flow into the interior of the device. The upper and lower parts (12 and 5) are elastically or spring biased apart and when the piston is pressed the upper part (12) moves down in to the lower part (5) until stopped by interengaging of the two flanges (6 and 14), forcing open a self-closing valve (8) in the bottom end of the lower part (5), so that the liquid in the bag is dispensed.