Patent ID: 8747357
Filing Date: 2014-06-10
Classification: A61M

Abstract:
1. An autoinjector comprising an outer housing in which can be mounted a syringe for holding a volume of medicament, the syringe for holding medicament having a needle at one end thereof, a syringe holder for supporting the syringe in an axial position relative to the outer housing, and an intermediate housing at least part of which is located within said outer housing, the syringe being moveable along an axial path relative to the outer housing upon actuation of the autoinjector to deliver an injection, said intermediate housing being provided with a blocking means capable of abutting the syringe or the syringe holder so as to be capable of preventing forward axial movement of the syringe when a forward axial force is applied to said needle before actuation of the autoinjector to deliver an injection, but incapable of preventing forward axial movement of the syringe during actuation of the autoinjector to deliver an injections; wherein said blocking means are moveable between a first blocking position in which said blocking means abut the syringe or syringe holder so as to block their axial path and a second, non-blocking position in which said blocking means do not block the axial path of the syringe or syringe holder; said blocking means comprising one or more fingers that are radially flexible substantially into and out of the axial path of said syringe or syringe holder; and wherein in the first blocking position the one or more radially flexible fingers are urged into the axial path of the syrinyringe holder, and, when no longerurged radially inwards, the one or more radially flexible fingers spring out of the axial path of the syringe or syringe holder to the second non-blocking position.