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Fluid delivery apparatus

  • US 5,019,047 A
  • Filed: 06/16/1989
  • Issued: 05/28/1991
  • Est. Priority Date: 06/16/1989
  • Status: Expired due to Term
First Claim
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1. A device for expelling fluids at a controlled rate comprising:

  • (a) a base having a width;

    (b) a distendable membrane constructed of an elastic material which is fitted over said base to form a chamber having a fluid outlet and a height substantially less than said width of said base, said distendable membrane being distendable in a manner to establish internal stresses therewithin tending to return said membrane to a less distended configuration, whereby fluid will be urged to flow from said fluid outlet; and

    (c) flow control means disposed internally of said chamber for controlling the rate of flow of fluid through said outlet, said flow control means comprising a thin permeable member superimposed over said base.

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