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Intravenous delivery system

  • US 4,432,468 A
  • Filed: 02/06/1981
  • Issued: 02/21/1984
  • Est. Priority Date: 02/06/1981
  • Status: Expired due to Fees
First Claim
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1. A system for controlling flow of fluid, comprising in combination;

  • a flexible bag containing fluid having an output tube,first means comprising,an enclosure containing an expandable sealed compartment including,means for maintaining pressure within said compartment at an operable level,said flexible bag being disposed within said enclosure for forcing fluid through said output tube,second means comprising,a container having a diaphragm fixed thereto capable of expanding in one direction,inlet valve means connected to said output tube,outlet valve means,fourth means disposed within said container having a first position closing said outlet valve means and opening said inlet valve means and a second position opening said outlet valve means and closing said inlet valve means,spring means disposed within said container for moving said fourth means from said first position to said second position each time sufficient fluid has been introduced into said container to expand said diaphragm a predetermined amount thereby forcing a discrete amount of fluid through said outlet valve means,fifth means moving said fourth means back to said first position each time said discrete amount of fluid is emitted through said outlet valve,third means connected to said outlet valve means providing fluid flow in accordance with a predetermined amount.

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