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Delivery devices with pulsatile effect

  • US 5,456,679 A
  • Filed: 12/07/1994
  • Issued: 10/10/1995
  • Est. Priority Date: 02/18/1992
  • Status: Expired due to Term
First Claim
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1. A delivery device for placement in an environment of use for the pulsatile delivery of a beneficial agent to said environment, the device comprising:

  • an enclosure, the enclosure defining an orifice therein;

    activating means within said enclosure for generating a pressure within said enclosure;

    a beneficial agent contained within said enclosure; and

    resilient sealing means for sealing said orifice, said resilient means being displaced from a first position sealing said orifice to a second position opening said orifice when said pressure within said enclosure, generated by said activating means, exceeds a predetermined pressure, said resilient means returning to said first position sealing said orifice when said pressure within said enclosure fails below said threshold pressure.

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