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Portable infusion device

  • US 5,167,631 A
  • Filed: 09/17/1991
  • Issued: 12/01/1992
  • Est. Priority Date: 09/17/1991
  • Status: Expired due to Fees
First Claim
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1. A device for pumping fluids which comprises:

  • a housing having a first fluid port, said housing being formed with a surface having a periphery and a predetermined contour circumscribed by said periphery; and

    an elastomeric membrane attached to said periphery over said contour surface to stretch said membrane into a nonlinear region of elasticity and create a potential chamber between said stretched membrane and said housing for receiving fluid therein through said first port and expelling fluid therefrom through a second port by nonlinear contraction of said membrane at a substantially constant pressure.

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