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Apparatus for precise transfer and manipulation of fluids by centrifugal and or capillary forces

  • US 8,337,775 B2
  • Filed: 09/08/2008
  • Issued: 12/25/2012
  • Est. Priority Date: 02/26/2002
  • Status: Active Grant
First Claim
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1. A multi-purpose device for analyzing a biological fluid sample comprising:

  • (a) at least one sample well for receiving said sample;

    (b) a capillary passageway communicating with at least one of said sample wells of (a) for receiving said sample from said sample well by capillary action, said capillary passageway including a metering capillary segment defining a uniform volume of said sample fluid, said capillary segment having at least three ends;

    a first and second end each delimited by the intersection of an air entry passageway with said segment;

    said air entry passageways separate from said at least one sample well and vented to the atmosphere; and

    a third end delimited by a capillary stop between said two intersecting points of said air entry passageways with said segment;

    said third end of said capillary segment in fluid communication with a first reagent well for transferring said uniform sample from said capillary segment to said first reagent well.

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