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Device for the removal of the ice formed on the surface of a wall, notably an optical or radio-electrical window

  • US 5,172,024 A
  • Filed: 10/02/1991
  • Issued: 12/15/1992
  • Est. Priority Date: 10/02/1990
  • Status: Expired due to Fees
First Claim
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1. A device to eliminate ice formed on the surface of a wall of an optical or radio-electric window, comprising:

  • a self-supporting piezoelectric material forming at least a portion of said wall chosen from among the ferroelectric polymers of the group comprising PVF2, PVF2 -TrFE, PVDCN-VAc, PVF2 -TFE and the mixture of these polymers with one another and/or with PMMA or PEMA, said piezoelectric material having a vibrating active surface that mechanically vibrates to eliminate ice on said wall, andmeans for polarizing said piezoelectric material, comprising an AC voltage source and electrodes made of a material of the group comprising resistive indium-tin oxide, polymers that are conductive in a matrix, hydrogenated amorphous silicon and polyimides charged with organic salts, the electrodes being in contact with said piezoelectric material according to a geometry for generating an acoustic wave having a direction of vibration which is oriented longitudinally and/or transversally to said surface to be de-iced, the amplitude of said vibration being sufficient to respectively detach and/or break the deposit of ice formed on said surface.

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