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Needle device

  • US 5,207,647 A
  • Filed: 11/05/1991
  • Issued: 05/04/1993
  • Est. Priority Date: 11/05/1991
  • Status: Expired due to Term
First Claim
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1. A needle device for the delivery of medicaments, comprising:

  • an elongated housing;

    a reciprocable hollow needle having a proximal end and a distal end with a lumen there between, said proximal end secured within said housing;

    a catheter disposed about said hollow needle, said catheter having a distal end and a proximal end, said proximal end of said catheter being attached to said housing;

    an arrangement of compressable and releasable springs disposed within said housing and attached to said hollow needle so as to bias said hollow needle therefrom; and

    a detent assembly to actuate retraction of said hollow needle within said catheter upon a decrease in pressure upon said hollow needle as it is being advanced into a space or potential space.

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