Patent ID: 7007696
Filing Date: 2006-03-07
Classification: A61M

Abstract:
1. A nasal mask cushion to sealingly connect a mask to a wearer's face, the cushion comprising: a substantially triangularly-shaped frame of resilient material having a mask engaging portion and connected by a side wall to a face engaging portion with a nasal bridge region and a lip region; a first membrane of resilient material having an inwardly extending rim substantially around said triangularly-shaped frame; a second membrane of resilient material spaced from and generally parallel to said first membrane and having a second inwardly extending rim; and an outer membrane of resilient material spaced from and generally parallel to said second membrane and having an outer inwardly extending rim, said outer membrane engaging a wearer's face in use, wherein a portion of the side wall in the lip region is thicker than a portion of the side wall in the nasal bridge region.