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Retracting tip trocar assembly

  • US 5,441,513 A
  • Filed: 03/12/1992
  • Issued: 08/15/1995
  • Est. Priority Date: 03/12/1992
  • Status: Expired due to Term
First Claim
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1. A retracting tip trocar assembly comprising:

  • an elongated trocar obturator extending in an axial direction and having a proximal end and a piercing tip at a distal end thereof;

    an elongated trocar tube in which the trocar obturator is housed, the piercing tip being movable in the axial direction from a cutting position at which the piercing tip is outside a distal end of the trocar tube to a shielded position at which the piercing tip is entirely within the trocar tube;

    a trocar handle housing which receives the proximal end of the elongated trocar obturator and which includes a catch;

    a first link pivotally attached to the trocar obturator and to a second link, the second link being pivotally attached to the trocar handle housing, the links being in a first configuration when the piercing tip is in a cutting position outside the distal end of the trocar tube and the links being in a second configuration when the piercing tip is in the shielded position; and

    retracting means mounted within the trocar handle for retracting the piercing tip from the cutting position to the shielded position, the retracting means acting on at least one of the first and second links;

    wherein the catch releasably maintains the links in the first configuration.

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