Patent ID: 8579867

Claim:
A medication delivery device comprising: a housing having a proximal and a distal end, a medication receptacle designed to be engaged with the housing a piston rod which is moveable in a distal direction for medication delivery and a drive device for rotating the piston rod in a first rotational direction and thereby moving the piston rod in the distal direction for medication delivery; wherein the piston rod comprises two threaded sections, wherein a first threaded section is provided for threaded engagement with a reset element and a second threaded section is provided for threaded engagement with the drive device and wherein the threads in the first and second threaded sections are oppositely disposed, wherein in an operational state the reset element is prevented from rotation with respect to the housing, the piston rod thereby being prevented from moving in a proximal direction, and in a resetting state the reset element is allowed to rotate with respect to the housing, the medication delivery device being resettable by rotating the piston rod and the reset element in a second rotational direction and moving the piston rod in the proximal direction.