Patent ID: 7753884

Claim:
An apparatus for dosed dispensing of an infusion fluid comprising: (a) a housing comprising detachably-interconnected first and second housing parts, said first housing part comprising a pressurized medium chamber and a first valve selected from the group consisting of a control valve and a pressure reduction valve; (b) a fluid-tight infusion bag forming an interchangeable fluid chamber having a flexible wall received within the second housing part; (c) a membrane having a first end and a second end, said first and second ends being attached to the housing in a region of a separation plane of the first and second housing parts sealing off the first housing part froth the second housing part; (d) a pressurized gas source replaceably connected to the first valve for supplying pressurized gas to the pressurized medium chamber for pressurizing said flexible wall via the membrane, said pressurized gas source comprising a carbonate formulation pressed into a tablet and an organic acid; and (e) a plug-in coupling for replaceably connecting the pressurized gas source with the first valve; wherein the first valve is directly connected to the pressurized medium chamber; and wherein the first and second housing parts are joined to each other at one side in an articulated manner and comprise a latching device on the opposite side.