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Portable positive airway pressure apparatus and method for attenuating the noise emitted therefrom

  • US 9,750,907 B2
  • Filed: 03/17/2014
  • Issued: 09/05/2017
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. A portable Continuous Positive Airway Pressure (CPAP) apparatus, comprising:

  • a housing, wherein the housing defines a first acoustic chamber and a second acoustic chamber, the first acoustic chamber having a volume and a first inlet port, the first inlet port defining a length and cross-sectional area that is proportionally related to the volume of the first chamber, the second acoustic chamber having a volume and a second inlet port, wherein the second inlet port extends from the first acoustic chamber into the second acoustic chamber;

    a blower unit that being disposed within the second acoustic chamber; and

    wherein the first inlet port includes an intake tube which extends from an exterior portion of the second acoustic chamber, passes through an interior portion of the second acoustic chamber, and into the first acoustic chamber.

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