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Composite ice protection heater and method of producing same

  • US 7,291,815 B2
  • Filed: 02/24/2006
  • Issued: 11/06/2007
  • Est. Priority Date: 02/24/2006
  • Status: Active Grant
First Claim
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1. A noise-attenuating ice protection heater of an aircraft component, the heater comprising:

  • (a) a pair of electrically insulating layers;

    (b) a plurality of spaced electric heater elements, each heater element comprising a graphite sheet disposed between the insulating layers;

    (c) at least one composite support layer, wherein the electric heater elements, the insulating layers, and the support layer include a plurality of spaced openings therethrough;

    (d) a pair of spaced bus strips in electrical contact with respective opposed portions of each electric heater element;

    (e) an open cell matrix underlying the insulating layers, the heater elements, and the support layer;

    (f) wherein the cells of the open cell matrix are in acoustic communication with the spaced openings;

    (g) wherein the spaced openings are in acoustic communication with an air mass external to the heater and the aircraft component; and

    (h) wherein the electrically insulating layers, the electric heater elements, the support layer, the bus strips, and the open cell matrix are bonded together to form a unitary structure.

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