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Unobstructing microdevices for self-clearing implantable catheters

  • US 9,604,039 B2
  • Filed: 06/20/2011
  • Issued: 03/28/2017
  • Est. Priority Date: 06/18/2010
  • Status: Expired due to Fees
First Claim
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1. An apparatus for self-clearing a flow pore in a human implant, comprising:

  • a housing configured to be disposed in a flow pore of the implant;

    said housing comprising a central bore spanning between an upper surface and a lower surface of the housing, the central bore providing fluid communication into said flow pore; and

    an actuator plate extending from the upper surface of the housing into the central bore via a cantilever beam;

    the cantilever beam having a first end emanating at the central bore and a second end terminating at the actuator plate;

    the actuator plate configured to reciprocate within the central bore between a first position extending downward at an angle into the central bore and a second position substantially at or above the upper surface of the housing;

    wherein the cantilever beam is stressed such that it is preloaded to nominally curve downward to extend the actuator plate in the first position;

    wherein the actuator plate comprises a magnet responsive to magnetic field such that the magnetic field drives the actuator plate toward the second position;

    wherein in the cantilever beam comprises a composite material having a first low-stress layer and a second compressed layer; and

    wherein the second compressed layer preloads the cantilever beam to nominally curve in the first position.

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