Patent ID: 6099504
Filing Date: 2000-08-08
Classification: A61M

Abstract:
A syringe comprising:a) a barrel having a liquid drug reservoir therein, the barrel having a first end and a second end;b) a delivery needle mounted on the first end of the barrel;c) a gas generator located at the second end of the barrel, the gas generator in communication with the reservoir when the gas generator is activated;d) gas generation activation means; ande) a sleeve moveably mounted on the first end of the barrel from a first position where the tip of the needle is concealed by the sleeve to a second position where the tip of the needle is exposed to a third gas generation activation position,f) whereby when the sleeve is initially pressed against an injection site, the sleeve moves 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 third position, it causes activation of the gas generator which drives a liquid from the reservoir into the injection site through the needle.