Patent ID: 9283333
Filing Date: 2016-03-15
CPC Classification: A61M,B05B,Y10T

Claim Text:
1. A device for administering a liquid medical formulation which is held in a container ( 3 ) inserted in the device and is expelled from the device through at least one nozzle opening ( 12 e ), wherein, before flowing through the at least one nozzle opening ( 12 e ), the liquid medical formulation flows through a very fine filter ( 120 which is formed by a microstructured component ( 12 ), and wherein a pre-filter ( 27 ) is arranged in front of the microstructured component ( 12 ) inside the device, in the flow path of the liquid, characterised in that a fine filter ( 28 ) is additionally provided between the pre-filter ( 27 ) and the microstructured component ( 12 ) in the flow path of the liquid, the fine filter ( 28 ) being different from the pre-filter ( 27 ), so that the particles of different sizes or natures are deposited on the pre-filter ( 27 ) and fine filter ( 28 ) before the formulation enters the microstructured component and an adsorption filter ( 32 ) is arranged in the flow path between pre-filter ( 27 ) and very fine filter ( 120 , the adsorption filter ( 32 ) being different from the pre-filter ( 27 ), so that particles of different sizes or natures are deposited on the pre-filter ( 27 ) and adsorption filter ( 32 ) before the formulation enters the microstructured component ( 12 ), the mode of action of the adsorption filter being characterised in that particles from a liquid flowing through the filter are able to accumulate on the surface of the filter as a result of intermolecular interactions.