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Cushion for patient interface

  • US 9,295,800 B2
  • Filed: 12/20/2013
  • Issued: 03/29/2016
  • 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 at least a nasal bridge region, a side of nose region, an upper cheek region and a lower cheek region, the cushion comprising:

  • a base wall structured to be connected to a frame;

    an underlying cushion extending away from the base wall towards the patient'"'"'s face when the cushion is worn; and

    a membrane provided to substantially cover at least a portion of the underlying cushion, the membrane including at least a nasal bridge region and a side of nose region adapted to form a continuous seal on a nasal bridge region and a side of nose region of the patient'"'"'s face, respectively,wherein the cushion has a spring configuration such that the underlying cushion is configured to move with respect to the base wall in accordance with a spring characteristic of the spring configuration and apply a spring force against the membrane when a force by the frame is applied to the underlying cushion when the cushion is worn, the spring characteristic having a vertical component in a direction perpendicular to the patient'"'"'s face and a lateral component normal to the vertical component, andwherein the lateral component of the spring characteristic is relatively more stiff in the side of nose region of the cushion and relatively less stiff in the lower cheek region of the cushion.

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