Electroactive polymer devices for moving fluid

  • US 7,394,182 B2
  • Filed: 12/21/2006
  • Issued: 07/01/2008
  • Est. Priority Date: 07/20/1999
  • Status: Expired due to Term
First Claim
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1. A device, comprising:

  • a diaphragm pump to draw fluid in from a pump inlet and expel fluid out through a pump outlet;

    a first valve including an electroactive material to allow fluid to flow into the diaphragm pump when the diaphragm pump draws fluid in from the pump inlet and to at least partially restrict fluid flow when the diaphragm pump expels fluid out through the pump outlet, wherein the electroactive material of the first valve includes an elastic modulus less than about 100 MPa; and

    a second valve including an electro active material to allow fluid to flow from the diaphragm pump when the diaphragm pump expels fluid out through the pump outlet and to at least partially restrict fluid flow when the diaphragm pump draws fluid in from the pump inlet, wherein the electroactive material of the second valve includes an elastic modulus less than about 100 MPa.

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