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System for withdrawing blood

  • US 8,636,758 B2
  • Filed: 10/11/2011
  • Issued: 01/28/2014
  • Est. Priority Date: 10/31/2000
  • Status: Expired due to Term
First Claim
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1. System for withdrawing body fluid comprisinga drive unit having a plunger which is moved from a resting position into a lancing position in order to carry out a lancing process anda lancing unit containing a lancet with a needle which in the resting position of the plunger is arranged within the lancing unit and is displaced by the plunger when it moves into the lancing position in such a manner that the needle at least partially emerges through an exit opening in the lancing unit,wherein the plunger and lancet are coupled together by a form fit in order to carry out a lancing process andthe plunger has a holding area which can be held in a form-fitting manner by a holding device on the lancet orthe lancet has a holding area which can be held in a form-fitting manner by a holding device on the plunger, wherein the holding device is firstly opened and closes around the holding area by means of a longitudinal movementwherein at least one holding element of the holding device moves transversely to the longitudinal direction,wherein the plunger and the lancet are decoupled with the holding device open when the plunger is at the resting position, wherein the at least one holding element is configured to move in a transverse direction to couple the plunger and the lancet when the plunger moves longitudinally from the resting position to the lancing position.

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