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Electroactive polymer systems

  • US 9,216,237 B2
  • Filed: 04/07/2014
  • Issued: 12/22/2015
  • Est. Priority Date: 11/09/2007
  • Status: Active Grant
First Claim
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1. A device comprising:

  • a core;

    a membrane;

    at least one first electrode connected to the core;

    at least one second electrode connected to the membrane;

    a collapsible electroactive polymer element configured to extend from or extend around at least a portion of the core, wherein the element is in an expanded configuration without application of a voltage and is in a collapsed configuration with the application of the voltage or in a collapsed configuration without application of a voltage and in an expanded configuration with the application of the voltage, the voltage being applied via the at least one first electrode and the at least one second electrode; and

    a first electroactive polymer sub element, a second electroactive polymer sub element, a first sub electrode operatively coupled to the first electoactive polymer sub element, a second sub electrode operatively coupled to the first and second electroactive polymer sub elements, a third sub electrode operatively coupled to the second electroactive polymer sub element, wherein a first voltage difference between the first sub electrode and the second sub electrode and a second voltage difference between the second sub electrode and third sub electrode results in movement of a portion of the first and second electroactive polymer sub elements in the same direction.

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