Patent ID: 6019747
Filing Date: 2000-02-01
Classification: A61M

Abstract:
A spring-actuated syringe, comprising:a housing having an open distal end and a proximal end terminated by a proximal end wall;a piston disposed in the housing for axial translation therein;a tether connecting the piston to the proximal end of the housing;a spring disposed longitudinally in the housing between the piston and the proximal end wall of the housing so as to bias the piston toward the distal end of the housing;a barrel for the containment of a liquid medicament, the barrel having a distal end portion having a fluid flow passage therethrough and an open proximal end, the proximal end of the barrel being axially insertable in the housing through the open distal end of the housing, whereby the piston is received in the barrel through the proximal end of the barrel when the barrel is inserted into the housing;a plunger disposed in the barrel for axial translation therein, the plunger being engaged by the piston when the piston is received in the barrel; andretention means, operable between the barrel and the housing, for retaining the barrel at a selected axial position in the housing when the barrel is inserted axially into the housing.