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Tangential-flow filtration system

  • US 6,926,833 B2
  • Filed: 04/22/2003
  • Issued: 08/09/2005
  • Est. Priority Date: 01/17/1996
  • Status: Expired due to Fees
First Claim
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1. A tangential-flow filter for selectively transferring a species from a fluid mixture to a fluid media, the filter comprising:

  • a filtration membrane having a first surface and a second surface;

    a cassette formed with a first channel and a second channel, the first channel being disposed to establish a tangential flow of the fluid mixture over the first surface of the membrane, the first channel having a cross-sectional area with the cross-sectional area decreasing in the direction of the tangential flow, the second channel being disposed to establish a tangential flow of the fluid media over the second surface of the membrane; and

    means for creating a pressure differential between the fluid mixture in the first channel and the fluid media in the second channel to cause the species to traverse the membrane from the fluid mixture to the fluid media.

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