×

Needle retraction system

  • US 5,531,694 A
  • Filed: 03/06/1995
  • Issued: 07/02/1996
  • Est. Priority Date: 08/31/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A medical assembly, comprising:

  • a barrel having an internal cavity extending along a longitudinal axis;

    a plunger assembly adapted for longitudinal sliding movement within the barrel cavity;

    a sleeve mounted to the barrel, the sleeve defining a forward end and a rearward end and an internal passage extending therebetween;

    a hub member mounted within the sleeve in a first position toward the forward end of the sleeve;

    a needle mounted to the hub member, the needle defining a lumen;

    passage means interposed between the needle lumen and the barrel cavity for establishing communication therebetween;

    bias means for urging the hub member toward the rearward end of the sleeve;

    a releasable retainer mechanism engageable with the hub member for retaining the hub member in its first position against the force of the bias means and movable to a release position for disengaging the hub member; and

    a trigger for selectively moving the releasable retainer mechanism to its release position in response to either engagement of the plunger assembly with the trigger or manual engagement with the trigger by a user regardless of the position of the plunger, wherein engagement of the hub member is released and the bias means functions to draw the hub member rearwardly to withdraw the needle into the internal passage defined by the sleeve.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×