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Fluid delivery apparatus

  • US 5,620,420 A
  • Filed: 05/01/1995
  • Issued: 04/15/1997
  • Est. Priority Date: 06/16/1989
  • Status: Expired due to Fees
First Claim
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1. A fluid delivery device for delivering fluids to a patient extracorporeal at a controlled rate comprising:

  • (a) a base having a fluid inlet and a fluid outlet interconnected by a fluid flow path;

    (b) filling means for introducing fluid into said fluid inlet;

    (c) a deformable membrane which is fitted over said base to define a chamber in communication with said fluid inlet and said fluid outlet, said membrane being movable from a first position to a second position whereby fluid within said chamber will be expelled through said fluid outlet;

    (d) an expandable member disposed outside said chamber and in contact with said membrane for moving said membrane from said first position to said second position; and

    (e) a cover superimposed over said base and said expandable member to form an enclosure, said cover including venting means for venting to atmosphere gases contained within said enclosure.

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