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Pneumoneedle with removable stylet assembly

  • US 5,104,381 A
  • Filed: 08/30/1991
  • Issued: 04/14/1992
  • Est. Priority Date: 08/30/1991
  • Status: Expired due to Term
First Claim
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1. A pneumoneedle comprising:

  • a) a handle having a longitudinal bore;

    b) a hollow needle secured to the handle and opening into the bore, said needle being adapted for penetrating a body cavity and providing a conduit into the cavity;

    c) a housing engagable with the handle in alignment with the bore;

    d) a stylet slidably received within the housing and for extension through the needle upon engagement of the housing with the handle;

    e) biasing means within the housing to resiliently urge the stylet outwardly relative to the housing;

    f) interengagable means on the housing and handle to releasably secure the housing in engagement with the handle and maintain the stylet in a condition extending through the needle;

    g) valve means carried by the housing for selectively opening and closing the housing to fluid flow therethrough; and

    ,h) seal means to establish a sealed connection between the needle and valve means when the handle and housing are engaged.

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