Patent ID: 6830560
Filing Date: 2004-12-14
Classification: A61M

Abstract:
A syringe comprising:a barrel having a liquid drug reservoir therein, the barrel having a first end and a second end, the drug reservoir having a piston slidingly engaged therein; a needle assembly mounted at the first end of the barrel, the needle assembly holding a needle; an energization source, located at the second end of the barrel; a nozzle sleeve moveably mounted at the first end of the barrel from a first position where the tip of the needle is concealed by the nozzle sleeve to a second position where the tip of the needle is exposed, to an activation position, wherein when the nozzle sleeve is initially pressed against an injection site, the nozzle sleeve moves within the barrel from the first position to the second position, and the tip of the needle penetrates the injection site, and when the sleeve moves from the second position to the activation position, said energization source is activated to move said piston which drives a liquid from the reservoir.