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Blood removal system

  • US 7,223,276 B2
  • Filed: 05/27/2003
  • Issued: 05/29/2007
  • Est. Priority Date: 05/28/2002
  • Status: Active Grant
First Claim
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1. A blood removal system for removing blood for diagnostic purposes, comprising:

  • a housing;

    a lancet drive connected to the housing and including;

    a drive spring;

    a cocking element connected to the drive spring;

    a drive rotor connected to the drive spring; and

    a coupling mechanism coupled to the drive rotor;

    wherein;

    during a cocking phase of the lancet drive the cocking element rotates in a first direction to tension the drive spring while the drive rotor is inhibited from rotating in the first direction;

    during a driving phase of the lancet drive the drive rotor is rotatably driven in the first direction while the cocking element is arrested against a backward rotation, the coupling mechanism converting rotational movement of the drive rotor to movement of the lancet along a puncture path; and

    a 360°

    rotation of the drive rotor causes a single puncture and return movement of the lancet.

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