US 12,233,247 B2
Injection device
Michael Helmer, Frankfurt am Main (DE); Michael Schabbach, Frankfurt am Main (DE); and Julian Kersting, Rüsselsheim (DE)
Assigned to Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed by Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed on Aug. 15, 2023, as Appl. No. 18/449,981.
Application 18/449,981 is a continuation of application No. 16/761,212, granted, now 11,759,575, previously published as PCT/EP2018/080078, filed on Nov. 5, 2018.
Claims priority of application No. 17200314 (EP), filed on Nov. 7, 2017.
Prior Publication US 2023/0381421 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/315 (2006.01)
CPC A61M 5/31553 (2013.01) [A61M 5/3156 (2013.01); A61M 5/31563 (2013.01); A61M 5/31585 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An injection device for setting and injecting a dose of a medicament, the injection device comprising:
an elongated housing extending along a longitudinal axis;
a piston rod to operably engage with a piston of a cartridge filled with the medicament;
a dose tracker selectively operably engageable with the piston rod, wherein the dose tracker is longitudinally displaceable relative to the housing from an initial position in a proximal direction towards a first activation position during setting of the dose and wherein the dose tracker is longitudinally displaceable relative to the housing in a distal direction from the first activation position towards the initial position during dispensing of the dose;
a spring to urge the dose tracker in the proximal direction relative to the housing;
an interlock to lock the dose tracker in the initial position relative to the housing;
a release member to release the interlock;
at least one first tracking stop feature provided on one of the dose tracker and the housing, wherein the at least one first tracking stop feature is configured to block a longitudinal displacement of the dose tracker relative to the housing when the dose tracker reaches the first activation position; and
a preselector separate from the release member and comprising at least one first preselector stop feature to engage with the at least one first tracking stop feature, wherein the preselector is at least one of translationally and rotationally displaceable relative to the housing between at least two preselection positional states.