Patent ID: 6270473
Filing Date: 2001-08-07
Classification: A61M

Abstract:
A self-contained, patient-fillable ampule for a jet injector, comprising:an elongate ampule body having an injection orifice at a first end, an electrically actuated propellant powder at a second end, and a hollow portion therebetween, said second end having an end wall;a piston slidably and sealingly mounted in said hollow portion of said ampule body; anda filling control rod coaxial with said hollow portion of said elongate ampule body, said filling control rod connected to said piston and extending through said rear end wall,whereby said ampule may be filled with medicine by a patient by pulling said control rod rearwardly and thereby retracting said piston and drawing medicine in through said injection orifice, and whereby the medicine may be administered by a patient by actuating said electrically actuated propellant powder to propel said piston forward and thereby force the medicine out through said injection orifice.