Patent ID: 9199039
Filing Date: 2015-12-01
Classification: A61M

Abstract:
1. An injection device comprising a forward driving rod, a dose setting element and a holder, the driving rod being displaceable relative to the injection device or relative to the holder in a distal injection direction of the injection device only, wherein the driving rod comprises a) at least one retaining or catch region arranged at one end of the driving rod configured as a toothing for releasably retaining the driving rod on or in the injection device or holder and b) a first coupling element for positioning the driving rod relative to the dose setting element and establishing an engagement between the driving rod and the dose setting element, wherein the dose setting element comprises a plurality of second coupling elements engagable with the first coupling element, each of the plurality of second coupling elements configured with a dose-differentiating complementary stop, catch point, recess or orifice adapted to engage with the first coupling element for selecting one of a plurality of different doses, wherein the dose setting element is movable relative to the driving rod between a first position, in which the first coupling element and the plurality of second coupling elements are disengaged with each other and the dose setting element is rotatable to set a dose, and a second position, where the first coupling element is engaged with one of the plurality of second coupling elements such that displacement of the dose setting element relative to the driving rod in the injection direction is prevented and the dose setting element is prevented from rotating to set the dose, wherein the engagement of the first coupling element with the one of the plurality of second coupling elements in the second position blocks a second dispensing from the injection device such that the injection device can be used for only a single dispensing operation, and wherein the engagement of the first coupling element and the one of the plurality of second coupling elements cannot be released or can be released only with great difficulty.