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Safety syringe with retraction trunk

  • US 6,589,209 B1
  • Filed: 09/05/2000
  • Issued: 07/08/2003
  • Est. Priority Date: 09/05/2000
  • Status: Expired due to Fees
First Claim
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1. 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.

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