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Controlled release osmotic infusion system

  • US 5,257,987 A
  • Filed: 05/21/1990
  • Issued: 11/02/1993
  • Est. Priority Date: 05/21/1990
  • Status: Expired due to Fees
First Claim
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1. A portable infusion device assembly comprising:

  • a. a first pouch containing infusate and fitted with a dispensing nozzle;

    b. a second pouch in pressure-transmitting relationship to the aforesaid first pouch;

    c. an integral power source comprising;

    a pressure-generating means for generating pressure in aforesaid second pouch, comprised of an osmagent and a liquid permeant, wherein a driving fluid is produced when permeant contacts osmagent;

    an activating means for initiating the action of the aforesaid power generating means;

    a rate-controlling means for regulating the volume change of the aforesaid first pouch, comprising a semipermeable membrane;

    d. a fluid-transport means in liquid transmitting relationship between the aforesaid power chamber and the aforesaid delivery chamber, and,e. a connecting means for attaching the aforesaid dispensing nozzle to the object of treatment; and

    ,f. a housing containing the aforesaid first and second pouches and in restraining relationship to the aforesaid first and second pouch.

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