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Hypodermic needle protection device

  • US 4,929,237 A
  • Filed: 11/07/1988
  • Issued: 05/29/1990
  • Est. Priority Date: 11/07/1988
  • Status: Expired due to Fees
First Claim
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1. A device for preventing exposure of a contaminated hypodermic needle comprising:

  • a housing unit having a larger proximal and smaller distal aperture for receiving a syringe and hypodermic needle attached to said syringe;

    a syringe operatively engageable within and removable from said housing unit comprising a syringe chamber for containing liquid medicament or body fluid and a hypodermic needle having a base, said needle operatively engageable with and removable from said syringe;

    spring means positioned at the distal end of said housing unit, said spring means engaging the base of said hypodermic needle, such that a pushing force applied to the proximal end of said syringe compresses said spring means and moves said syringe distally within said housing unit;

    safety catch means for retaining said housing unit and syringe in engaged relationship in the absence of any pushing or retaining force applied to said syringe; and

    locking means for selectively preventing relative movement between said housing and syringe and hypodermic needle when the hypodermic needle is in use with the spring means compressed,whereby, when said pushing force is released said spring means extends and said syringe retracts proximally within said housing unit, retracting said hypodermic needle within said housing unit to prevent contact of said hypodermic needle with the operator of said device.

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