Patent ID: 8631792

Claim:
A patient interface comprising: (a) a shell; and (b) a cushion operatively coupled to the shell, the cushion having a generally triangular shape and comprising: an apex region forming an apex of the triangular shape; a first side region forming a first side of the triangular shape; a second side region forming a second side of the triangular shape, wherein the first side region and the second side region extend from the apex region; a bottom region forming a bottom side of the triangular shape opposite the apex of the triangular shape and disposed between the first side region and the second side region; a flap portion; a middle portion adjacent the flap portion; a connection portion adjacent the middle portion; and a pleat extending about at least a portion of an outer periphery of the cushion, the pleat including a first pleat portion located at a first position along the outer periphery and a second pleat portion located at a second position along the outer periphery spaced apart from the first position, wherein a greatest depth of the first pleat portion relative to an interior of the cushion is greater than a greatest depth of the second pleat portion relative to an interior of the cushion, wherein the first pleat portion or the second pleat portion has a generally concave shape, wherein the pleat includes a first apex pleat portion provided in the apex region and a second apex pleat portion provided in the apex region, wherein the first apex pleat portion and the second apex pleat portion are spaced apart from one another in the apex region, are not interconnected to one another in the apex region and terminate short of one another in the apex region.