Patent ID: 8813748
Filing Date: 2014-08-26
Classification: A61B,A61M

Abstract:
1. A mask assembly for delivery of a supply of gas to an entrance to the airways of a patient, said patient having a nasal bridge region, a cheek region and a chin region, said mask assembly comprising: a headstrap system to secure the mask assembly relative to the patient's head; and a cushion adapted to confront the face of the patient, said cushion comprising first and second membranes of integrally formed elastomeric material, each of said first and second membranes having an aperture adapted to receive the patient's nose and mouth, the seal forming portion is structured such that it is not required to turn in on itself to conform with the patient's face, said first membrane provides a supporting structure for the second membrane, said second membrane covering said first membrane, wherein the second membrane is substantially unsupported by the first membrane where the cushion is adapted to seal with the nasal bridge region in use.