Patent ID: 8746249

Claim:
A patient interface device, comprising: a cushion member ( 136 ) having a main body portion having a surface structured to engage a face of a patient; a frame member coupled to the cushion member, the frame member being structured to be coupled to a headgear; a fluid coupling conduit coupled to a first side of the frame member; an engagement member coupled to the cushion member; and a rotatable cam wheel disposed between a second side of the frame member and the engagement member, wherein a first surface of the cam wheel engages the engagement member such that rotation of the cam wheel relative to the cushion member changes a position of the main body portion relative to the frame member, wherein rotation of the cam wheel relative to the cushion member moves the main body portion relative to the frame member along a longitudinal axis of the cushion member, wherein the cushion member includes a bellows portion adjacent the main body portion, wherein the cam wheel is rotatable about the bellows portion, and wherein rotation of the cam wheel about the bellows portion causes the bellows portion to expand along a longitudinal axis of the cushion member.