Patent ID: 7229432

Claim:
An injection device for a syringe, the device comprising a housing for the syringe with a forwardly biased needle shroud at the leading end of the housing, the needle shroud being capable of movement between forward and rearward positions, the shroud being non-rotatably mounted relative to the housing, the syringe during injection being moved forwards relative to the housing to project a needle of the syringe beyond the shroud, when said shroud is in said rearward position, wherein the shroud has at least one rearwardly extending finger that extends past an inwardly projecting abutment within the housing, that finger being flexed in a circumferential direction as the shroud moves from the rearward position to the forward position under said forward bias, for a tip of the finger to move past the abutment, the finger being located to spring back to a natural configuration with said finger tip in front of the abutment, thereby to prevent the shroud moving backwards, after the shroud has returned to the forward position.