Patent ID: 9132255
Filing Date: 2015-09-15
Classification: A61M,B29C,B29K,B29L

Abstract:
1. A patient interface, comprising: a cushioning structure including at least one hollow chamber filled with first and second discrete and/or layered filling materials, the first filling material being softer and/or more comformable than the second filling material to provide patient comfort in use, and the first filling material adapted to be positioned closer to the patient's face in use; and a seal forming structure formed in one piece with the cushioning structure, the seal forming structure including a thin membrane flap that is structured to provide a seal to the patient's face, the thin membrane flap including a free end that is spaced from the cushioning structure in its substantially relaxed, unstressed state and is adapted to be responsive to a difference between mask pressure and ambient pressure to effect a seal with a face region of a patient, wherein the chamber extends only around a portion of the perimeter of the cushioning structure such that the chamber with first and second filling materials is provided in cheek and lip regions of the cushioning structure and a solid silicone portion is provided in a nasal bridge region of the cushioning structure.