Patent ID: 8545456

Claim:
An administering apparatus comprising: a) a casing; b) a driven device for performing a delivery stroke in an advancing direction along a translational axis; c) a drive device for driving the driven device; d) a dosage setting member coupled to the driven device such that a rotational dosing movement performed by one of the dosage setting member and the driven device relative to the other about the translational axis causes an axial translational dosing movement of the dosage setting member relative to the driven device and the casing; e) a translational stopper positioned opposite and axially facing the dosage setting member, the translational stopper limiting axial movement of the dosage setting member 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 secured against rotating by the dosage setting member and at least one second rotational stopper secured against rotating by the casing, the first rotational stopper and the second rotational stopper abutting against one another in the end position of the dosage setting member, and wherein in the end position, the translational stopper and the dosage setting member abut one another and the rotational block prevents the dosage setting member from axially pressing against the translational stopper in the second rotational direction.