A discharging device for liquids.
The invention relates to a discharging device for liquids, more particularly for pharmaceutical liquids, comprising a delivery device (10), a liquid storage receptical (20) communicating with an input (10a) of the delivery device for storage of the liquid (30), and a discharge orifice (12) which communicates with an outlet (10b) of said delivery device,
and the liquid storage receptical (20) is at least in part in the form of a dimensionally flexible liquid-containing bag (20) and the liquid storage receptical (20) is disposed in a buffer chamber of constant volume (42).
To prevent air from escaping from the buffer chamber (
42), provision is made
- for the buffer chamber to be sealed by a protective housing from the environment (1) in a gas-tight manner,
- for the buffer chamber to communicate with the environment through at least one capillary passageway for the purpose of pressure compensation, or
- for the buffer chamber (42) to communicate with the environment (1) via a balancing passageway for the purpose of pressure compensation, while a valve (70) which opens in dependence on the pressure differential is disposed in this balancing passageway.