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Pub. No.:    WO/2018/197730    International Application No.:    PCT/EP2018/061056
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Tue May 01 01:59:59 CEST 2018
IPC: A61M 11/00
A61M 11/02
A61M 15/00
B05B 11/00
Applicants: SOFTHALE NV
Inventors: BARTELS, Frank
RAWERT, Jürgen
The invention relates to the field of inhalation devices for liquids. In particular, the invention relates to an inhalation device having improved flow characteristics. A inhalation device for medically active liquids (F) for generation of an aerosol com- prises a housing (1), inside this housing (1) a reservoir (2) for storing a liquid (F), a pumping device with a hollow cylinder (9) providing a pumping chamber (3) for the generation of a pressure inside said pumping chamber (3), wherein the pumping chamber is fluidically connected with the reservoir (2) via an inlet check valve (4) which blocks in direction of the reservoir (2), a riser pipe (5) which can be received with at least one reservoir-facing, interior end (5A) in said hollow cylinder (9), and a nozzle (6) which is connected liquid-tight to an exterior end (5B) of the riser pipe (5), wherein the volume of the pumping chamber (3) is changeable by means of relative motion of the cylinder (9) to the riser pipe (5), and is characterised in that the riser pipe (5) is immobile and firmly attached to the housing (1) and to the nozzle (6), whereas the hollow cylinder (9) is moveable relative to the housing (1) and to the nozzle (6). The invention also discloses a method for the generation of an aerosol of a medically active liquid (F) by means of an inhalation device.