Patent ID: 7900850

Claim:
A microdosing apparatus, comprising: a fluid conduit having a flexible tube with a first end for connecting to a liquid reservoir and a second end where an outlet opening in contact with a surrounding atmosphere is located; and an actuating device having a displacer with adjustable stroke, by which the volume of a portion of the flexible tube is changed in an active area by moving the displacer between a first end position and a second end position, wherein the tube is partly compressed at least in the first end position or the second end position, the fluid conduit having no erratic cross section changes between the active area and the outlet opening in a resting state, the displacer being disposed relative to the outlet opening in such a manner that and the actuating device being configured to move the displacer in such a manner that, liquid is dispensed as free flying droplets or as free flying jet at the outlet opening, and the fluid conduit having such a cross sectional area that a liquid to be dosed can be moved through the fluid conduit by capillary forces.