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Apparatus for shielding a syringe needle

  • US 5,595,566 A
  • Filed: 12/08/1995
  • Issued: 01/21/1997
  • Est. Priority Date: 01/31/1995
  • Status: Expired due to Fees
First Claim
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1. A syringe assembly comprising:

  • a syringe housing having a main body and a restricted end;

    a needle attached to the restricted end of said syringe housing;

    a flexible snap ring mounted about the restricted end of said syringe housing;

    a tubular collar mounted about the restricted end of said syringe housing adjacent said flexible snap ring, said tubular collar including at least one radially extending projection;

    hinge means for pivotally securing said flexible snap ring to said tubular collar, said flexible snap ring, tubular collar and said hinge means forming an adapter assembly;

    means for shielding said needle;

    at least one longitudinally extending slot formed in an interior wall of said needle shielding means, each radially extending projection on the tubular collar of said adapter assembly slidably engaging a corresponding one of said longitudinally extending slots, the engagement between each projection and corresponding slot allowing said needle shielding means to be moved between an extended position surrounding and shielding said needle, and a retracted position in which said needle is exposed for use; and

    groove means formed about an interior diameter of said needle shielding means, wherein said flexible snap ring extends into said groove means when said needle shielding means is moved to said extended position surrounding and shielding said needle, thereby permanently locking said needle shielding means in said extended position.

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