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DEVICE AND METHOD EMPLOYING SHAPE MEMORY ALLOY

  • US 20100049133A1
  • Filed: 10/02/2009
  • Published: 02/25/2010
  • Est. Priority Date: 10/09/2002
  • Status: Abandoned Application
First Claim
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1. A medical device for pumping a fluid, comprising:

  • an actuator having a portion disposed in a displacement cavity;

    a shape memory alloy wire attached to the actuator to impart movement of the actuator in a first direction in the displacement cavity;

    a digital timing circuit for activating the shape memory alloy wire including an energy source for providing electrical energy to the shape memory alloy wire; and

    a reservoir containing a fluid and being in fluid communication with the displacement cavity so that as the shape memory wire imparts movement to the actuator in the first direction, a predetermined volume of fluid is drawn from the reservoir into the displacement cavity.

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