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Method and apparatus for separating biological materials

  • US 9,011,800 B2
  • Filed: 07/16/2009
  • Issued: 04/21/2015
  • Est. Priority Date: 07/16/2009
  • Status: Active Grant
First Claim
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1. A separation system to separate a multiple component material into at least two fractions, comprising:

  • a separation container defining a volume within an interior wall, a first end wall, and a second end wall;

    a buoy separation system in the volume operable to move to a selected interface of the multiple component material when the multiple component material is separated, the buoy separation system including;

    a first buoy portion having a passage between a first side and a second side of the first buoy portion;

    a second buoy portion at a selected distance from the second side of the first buoy portion, wherein the selected distance defines a collection volume between the second side of the first buoy portion and the second buoy portion;

    a third buoy portion extending between the first buoy portion and the second buoy portion;

    a valve assembly extending from the third buoy portion, the valve assembly has a sealing member the is formed separate and distinct and is moveable relative to a flexible member, wherein the flexible member is positioned between the sealing member and the second buoy portion and holds the sealing member against the first buoy portion to seal the passage in the first buoy portion to separate the collection volume from a volume exterior to the collection volume on the first side of the first buoy portion;

    wherein the valve assembly is operable to be unsealed from the first buoy portion to allow a selected fraction to move into the collection volume.

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