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Safety lancet device

  • US 7,452,366 B2
  • Filed: 05/06/2004
  • Issued: 11/18/2008
  • Est. Priority Date: 05/06/2004
  • Status: Expired due to Fees
First Claim
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1. A safety lancet device comprising:

  • a casing;

    a driver assembly mounted in the casing and comprisinga cylindrical container mounted securely with the casing and comprisinga cylindrical container proximal open end;

    a distal open end;

    a cylindrical container inner surface;

    a cylindrical container outer surface;

    an outer diameter;

    an inner diameter,a cylindrical container middle;

    an annular protrusion formed integrally with and extending inward from the cylindrical container inner surface in the cylindrical container middle and having an annular protrusion inner surface, an inner diameter and a top; and

    multiple side slots formed through the cylindrical container outer surface, between the annular protrusion and the distal open end and each comprising a top and a bottom;

    a cylindrical pressing unit slidably mounted around the distal open end of the container and comprisinga cylindrical pressing unit proximal end;

    a cylindrical pressing unit distal end;

    an inner diameter corresponding to the outer diameter of the container;

    multiple protruding keys formed integrally with and extending outward from the cylindrical pressing unit distal end and having respectively bottoms; and

    a rod formed on and extending downward from the cylindrical pressing unit proximal end and having a rod free end;

    a cylindrical controller slidably mounted in the distal open end of the container and comprisinga cylindrical controller proximal end;

    a cylindrical controller distal end;

    an outer diameter corresponding to the inner diameter of the container;

    a cylindrical controller outer surface;

    a cylindrical controller inner surface;

    multiple arced controller tabs corresponding respectively to the protruding keys of the pressing unit and the side slots of the container and having respectively an attached end and an arced tab controller free end, wherein the attached end is formed on and extends from the cylindrical controller outer surface; and

    an inner annular ring formed on and extending radially inward from the cylindrical controller inner surface and near the cylindrical controller distal end and having an inner diameter smaller than the inner diameter of the annular protrusion of the container;

    a pushing unit slidably mounted in the controller and comprisinga proximal closed end;

    a pushing unit distal closed end;

    an outer diameter smaller than the inner diameter of the inner annular ring in the controller;

    a head formed on and extending upward from the pushing unit distal closed end and having an outer diameter larger than the inner diameter of the inner annular ring in the controller; and

    multiple arced tabs formed on and extending downward from the head and respectively havingan attached end;

    an arced tab free end; and

    an outer diameter smaller than the inner diameter of the annular protrusion in the container when the arced tab free end abutting the pushing unit; and

    a resilient element mounted between the pushing unit and the casing; and

    a needle hub with a needle slidably mounted in the cylindrical container proximal open end of the container.

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