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Fluid delivery apparatus

  • US 5,411,480 A
  • Filed: 05/18/1993
  • Issued: 05/02/1995
  • 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 an ullage protuberance, a fluid inlet and a spaced-apart fluid outlet, said fluid inlet and said fluid outlet being interconnected by a fluid flow path;

    (b) valve means disposed intermediate said fluid inlet and said fluid outlet for controlling fluid flow through said flow path;

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

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

    (e) an expandable member disposed in contact with said membrane for moving said membrane from said first position to said second position.

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