Patent ID: 9421339
Filing Date: 2016-08-23
CPC Classification: A61B,A61M

Claim Text:
1. A patient interface for treatment of sleep apnea, comprising: a body for connection with a supply of pressurized breathable gas under continuous positive airway pressure; and a compliant cushion of silicone elastomer defining at least a portion of a breathing chamber configured to communicate the pressurized gas to a patient's nasal passages, said cushion including: a frame, said frame being of resilient material and having a first membrane, the first membrane extending along at least a portion of an inner perimeter of the frame, said frame having a front portion with an edge structured to be coupled to the body; and a second membrane of resilient material, said second membrane spaced an open distance from said first membrane along substantially an entire length of the second membrane when the patient interface is not in use, a portion of said second membrane forming a face contacting seal, wherein a substantially full perimeter of the second membrane is provided in covering yet spaced relation to the first membrane, wherein along at least a portion of the perimeter of the second membrane, a surface of the second membrane is deformable from said spaced distance to abut against and contact a surface of the first membrane in dependence at least in part on a deformation force applied to the second membrane, and wherein the first and second membranes are formed as a one-piece unit and wherein said first and second membranes are turned inwards relative to the frame along substantially the full perimeter of the frame.