Patent ID: 9283327
Filing Date: 2016-03-15
CPC Classification: A61M

Claim Text:
1. Auto-injector for administering a dose of a liquid medicament (M), comprising: a substantially cylindrical housing arranged to contain a pre-filled syringe, a syringe retainer slidably arranged with respect to the housing that mounts a pre-filled syringe with an injection needle, a plunger and a stopper for sealing a syringe barrel, a coupling shroud slidably arranged within the housing and releasably coupled to the plunger and a single drive means capable of, upon release: driving the coupling shroud from a first position (I) in the proximal direction (P), wherein the proximal translatory movement of the coupling shroud with respect to the housing, translates the syringe retainer in the proximal direction (P) to expose the injection needle of the pre-filled syringe, depresses the plunger connected to the stopper into the syringe barrel to expel the dose of medicament (M) and advances a needle shroud to a safe position (PS) to surround the injection needle after the medicament (M) has been at least partially delivered, wherein the coupling shroud is decoupled from the plunger at a pre-determined second position (II) defined by an aperture formed into the housing, wherein a coupling catch is arranged to abut against a shoulder formed to the plunger to releasably couple the plunger to the coupling shroud.