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Liquid distribution system

  • US 6,033,544 A
  • Filed: 11/07/1996
  • Issued: 03/07/2000
  • Est. Priority Date: 10/11/1996
  • Status: Expired due to Fees
First Claim
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1. A system for selectively distributing liquid from two or more liquid sources to a plurality of cells, the system comprising:

  • (A) liquid sources;

    (B) a substrate comprising a network of fluid channels of capillary dimensions for directing liquid from the liquid sources to a plurality of outlets for outputting liquid at the cells;

    (C) pumps, that move liquid with electrodes, for each outlet, wherein the electrodes are incorporated into the substrate, the pumps for selectively pumping liquid from a liquid source and out of one of the outlets;

    (D) capillary barriers interposed in the channels, each comprising an opening into a chamber, each capillary barrier for inhibiting the flow of liquid out a given outlet; and

    (E) at least one gas reset mechanism comprising a network of channels having inlets into the chambers operable to inject gas in the chambers and thereby remove liquid from the chambers and improve the operation of the capillary barriers;

    wherein the pumps can be selectively operated, and at least one said cell can receive liquid from either a first liquid source or another liquid source depending on the operation of the pumps.

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