Patent ID: 6589209
Filing Date: 2003-07-08
Classification: A61M

Abstract:
A retractable safety syringe module, comprising:(a) a syringe housing having a syringe barrel and a retraction trunk formed together at a distal end of the syringe housing to form an annular chamber, wherein the distal end of the retraction trunk forms a sealing collar having a port in fluid communication with the annular chamber; (b) an annular plunger extending through a proximal end of the annular chamber, the annular plunger having a sliding gasket formed along the distal end of the annular plunger for sealing against the interior of the annular chamber; (c) a biased needle cannula carriage releasably secured against the sealing collar, the biased needle cannula carriage having a connector for selectively receiving a needle cannula, a passage providing fluid communication between the sealing collar port and the connector; and (d) a bar stop secured within the retraction trunk, the bar stop having a distal end releasably securing the biased needle cannula carriage against the sealing collar and a proximal end secured to a stop cross bar, wherein the stop cross bar slideably extends through a side of the syringe barrel and through diagonal sides of the retraction trunk.