Respiratory apparatus

  • US 10,987,477 B2
  • Filed: 11/16/2016
  • Issued: 04/27/2021
  • Est. Priority Date: 02/04/2013
  • Status: Active Grant
First Claim
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1. A foam cushion assembly for a patient interface for providing a pressurised air to a user'"'"'s airway, the foam cushion assembly comprising:

  • a foam cushion portion configured to, in use, seal around portion of the user'"'"'s nose; and

    a flexible support portion extending along a periphery of the foam cushion portion so as to support the foam cushion portion,wherein the foam cushion portion has a trapezium cross sectional shape in at least a side of nose region and comprises;

    (a) a sealing surface including at least a portion thereof at a first side of the trapezium cross sectional shape, the at least a portion of the sealing surface including a radially flat region for user facial contact at the first side, and (b) a fixing surface side of the trapezium cross sectional shape, the fixing surface side being opposite to the first side and comprising a planar surface for adhering to a surface of the flexible support portion,wherein the sealing surface has a three-dimensional surface contour arranged so that the radially flat region in at least a portion of the sealing surface'"'"'s periphery is inwardly inclined, with respect to a mid-contact plane of the patient interface, for embracing and conforming to a shape of the user'"'"'s face in use,wherein the sealing surface includes a portion for sealing above a pronasale portion of the user'"'"'s nose in use,wherein the radially flat region is in both of a side of mouth region and a side of nose region,wherein the three-dimensional surface contour is radially flat about the sealing surface'"'"'s periphery in both side of mouth regions, both side of nose regions and a bottom region,wherein the least a portion of the sealing surface includes a planar surface region, wherein the three-dimensional surface contour is arranged so that the planar surface region in the at least a portion of the sealing surface'"'"'s periphery is inwardly inclined, with respect to the mid-contact plane of the patient interface, for embracing and conforming to the shape of the user'"'"'s face in use, andwherein the foam cushion assembly is arranged to seal around a portion of the user'"'"'s mouth in use and wherein the three-dimensional surface contour comprises side of mouth planar regions.

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