Patent ID: 9011390
Filing Date: 2015-04-21
Classification: A61M,B65D

Abstract:
1. A micro-dosing device for micro-dosing a liquid from a liquid reservoir, the micro-dosing device comprising: a structure configured to receive a liquid reservoir; a drive unit comprising a first end, a second end, and a drive motor; a displacement piston configured to move axially and dispense the liquid from the liquid reservoir when the drive motor activates and axially displaces the drive unit relative to the structure and relative to a sleeve wherein the sleeve comprises an inner thread that engages the outer thread of a rotatable member and the rotatable member is coupled to the first end of the drive unit and comprises an outer thread coaxially arranged around an axis of rotation; and an anti-rotation element disposed between the drive unit and the sleeve wherein the anti-rotation element prevents a rotation of the drive unit relative to the sleeve and permits an axial displacement of the drive unit relative to the sleeve and wherein the anti-rotation element extends radially outward from the periphery of the drive unit through a longitudinal slot formed through the structure and through the sleeve.