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Air eliminator

  • US 5,674,200 A
  • Filed: 02/05/1996
  • Issued: 10/07/1997
  • Est. Priority Date: 02/05/1996
  • Status: Expired due to Fees
First Claim
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1. A device for removing gas bubbles from liquids in intravenous delivery systems comprising:

  • a) a housing having an interior chamber for receiving liquid passing through the device, said housing having a vent opening on the periphery of the chamber;

    b) a hydrophobic membrane attached to said housing and positioned over said vent opening, said hydrophobic membrane capable of allowing gas bubbles in the liquid to pass through said vent opening while preventing aqueous liquid from passing through said vent opening;

    c) an inlet passage to the housing, said inlet passage being fluidly contiguous with the chamber for delivering the liquid directly into the chamber;

    d) an outlet passage to the housing, said outlet passage being fluidly contiguous with the chamber for delivering any liquid accumulated in the chamber directly from the chamber, said outlet passage comprising a stem which extends said outlet passage inwardly into the chamber and terminates in an interior end; and

    e) said vent opening being shaped and located in the housing such that at least a portion of the vent opening will be positioned at an elevation higher than that of the interior end of the stem irrespective of the orientation of the housing.

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