Patent ID: 8568366

Claim:
An administering apparatus including a reservoir module, the apparatus comprising: a) a front casing section comprising a reservoir for a product; b) a piston in the reservoir; c) a piston rod for acting on the piston; d) a dosage setting member coupled to the piston rod such that the piston rod and the dosage setting member slave one another in the advancing direction, wherein a rotational dosing movement is performed by one of the dosage setting member and the piston rod relative to the other about a translational axis, the rotational dosing movement causing an axial, translational dosing movement of the dosage setting member relative to the piston rod and the front casing section; e) a translational stopper for limiting movement of the piston rod and the dosage setting member in the advancing direction, the dosage setting member abutting against the translational stopper in an axial end position of the dosage setting member; and f) a rotational block which, in the end position of the dosage setting member, permits the rotational dosing movement in a first rotational direction and blocks the rotational dosing movement in a second rotational direction, wherein the rotational block comprises at least one first rotational stopper and at least one second rotational stopper, the first rotational stopper and the second rotational stopper abut against one another in the end position of the dosage setting member, wherein the dosage setting member is moved away from the translational stopper by the permitted rotational dosing movement and is prevented from axially pressing against the translational stopper in the blocked rotational dosing movement.