Patent ID: 8522783
Filing Date: 2013-09-03
Classification: A61B,A61M

Abstract:
1. A mask cushion to sealingly connect a mask to a wearer's face, the cushion comprising: a frame of resilient material having a rim to at least partially surround the wearer's nose; and a membrane also of resilient material, said membrane being thinner than and relatively more flexible than said frame, said membrane being fixed to and extending away from said frame so as to be spaced from said rim by a gap, said membrane having an outer surface forming a face contacting seal portion that is pre-shaped to generally match the contours of the wearer's face, wherein the face contacting seal portion is structured such that it is not required to turn in on itself to conform with the wearer's face, in use; wherein: the frame and rim are structured to resist deformation so as to form a support structure for the membrane, said rim and frame are not in contact with the wearer's face in use, and said membrane is resiliently deformable towards said gap to abut said rim in use of said cushion.