Patent ID: 6802828
Filing Date: 2004-10-12
Classification: A61J,A61L,A61M,B65B,Y10T

Abstract:
An assembly for forming a barrel of a pre-filled syringe, comprising:(a) a syringe body having a generally cylindrical side wall with an inner surface and an outer surface, the side wall extending between a lower rimmed end and an upper neck end; (b) a generally cylindrical elastomeric piston having an upper surface, a lower surface and a side surface; (c) a generally cylindrical sleeve having a base end and a top end, wherein said syringe body is received inside the top end of the sleeve intermediate the top end and the base end of the sleeve; said sleeve being in a close fit with the rimmed end of the syringe body; (d) piston support means integrally formed with the sleeve, said piston support means having a support surface on which the piston is supported, said lower surface of said piston proximate to and engaging said piston support means and said upper surface of said piston distally located with respect to said piston support means, said upper surface of said piston being spaced longitudinally apart from the rimmed end of the syringe body, said piston residing outside said syringe body while the syringe body is receive inside the top end of the sleeve thereby creating a gap between the upper surface of the piston and the rimmed end of the syringe body, permitting sterilization of the syringe body and the piston by a sterilizing gas; and (e) said side surface of said piston adapted to form a hermetic seal with the inner surface of the cylindrical side wall of said syringe body when said piston is inserted into the rimmed end of the syringe body after sterilization.