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Cushion for patient interface

  • US 10,456,544 B2
  • Filed: 03/22/2016
  • Issued: 10/29/2019
  • Est. Priority Date: 01/12/2005
  • Status: Active Grant
First Claim
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1. A cushion for a patient interface that delivers breathable gas to a patient, the cushion including a nasal bridge region, a pair of side of nose regions, a pair of upper cheek regions, a pair of lower cheek regions and a chin region, the cushion comprising:

  • a non-face contacting portion including a base wall structured to be connected to a frame;

    a face-contacting portion structured to engage the patient'"'"'s face,wherein the face-contacting portion comprises a membrane including a nasal bridge region, a pair of cheek regions, and a chin region adapted to form a continuous seal on a nasal bridge region, a pair of cheek regions, and a chin region of the patient'"'"'s face, respectively,wherein the membrane forms a widest point of the cushion, and a bottom portion of the base wall is entirely internally offset with respect to the widest point,wherein the membrane has an inner edge defining an aperture adapted to receive the patient'"'"'s nose, andwherein, when the cushion is stationary on a horizontal surface and oriented such that the non-face contacting portion faces towards the horizontal surface,1) the membrane in the nasal bridge region of the cushion has an exterior surface that includes two sides meeting at a centerline, each side sloping downwardly from the centerline,2) in a cross-sectional view, the exterior surface of the membrane in the nasal bridge region of the cushion a) curves downwardly along the centerline from a peak of the membrane'"'"'s curvature to the inner edge of the membrane, and b) curves downwardly along the centerline from the peak of the membrane'"'"'s curvature in a direction away from the inner edge of the membrane, to thereby form a convex shape,3) in a cross-sectional view, the membrane in the chin region of the cushion has an exterior surface forming a convex shape such that the exterior surface curves downwardly from a peak of the membrane'"'"'s curvature to the inner edge of the membrane, and4) the exterior surface of the membrane in the chin region of the cushion extends from one lower cheek region to the other lower cheek region and forms a concave shape adapted to engage the patient'"'"'s chin region.

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