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Propeller surface area treatments for sound dampening

  • US 10,259,574 B2
  • Filed: 12/18/2015
  • Issued: 04/16/2019
  • Est. Priority Date: 12/18/2015
  • Status: Active Grant
First Claim
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1. An aerial vehicle comprising:

  • a motor configured to rotate a propeller such that the propeller generates a lifting force;

    the propeller including;

    a hub that is coupled to the motor so that the motor can rotate the propeller;

    a propeller blade extending from the hub, the propeller blade including;

    a leading edge;

    a tip;

    a trailing edge;

    a surface area that extends between the hub and the tip and between the leading edge and the trailing edge, the surface area having an upper side and a lower side;

    a sound dampening material affixed to at least a portion of the surface area, the sound dampening material configured to absorb and dampen sound from air passing the propeller blade as the propeller blade rotates; and

    a plurality of serrations positioned along the leading edge of the propeller blade configured to disrupt air passing the propeller blade;

    the sound dampening material configured to absorb at least a portion of a sound generated by the disrupted air.

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