Patent ID: 7861718

Claim:
An adjustable mask apparatus for use in a breathing assistance system, the adjustable mask apparatus comprising: a housing for supporting a cushion configured to provide a seal against a patient's face; an adjustment arm including: a first end configured for attachment to a head gear; and a second end rotatably coupled to the housing to allow rotation of the adjustment arm to adjust a distance between the first end of the adjustment arm and the patient's head; and a locking member adjustably coupled to the housing and configured to secure the adjustment arm in one of a plurality of predetermined rotational positions, each predetermined rotational position comprising a rotational position of the adjustment arm with respect to the housing; wherein the adjustment arm is rotatably coupled to the housing at a first location, and wherein the locking member is adjustably coupled to the housing at a second location spaced apart from the first location, and wherein the locking member is lockable in a plurality of different positions by interaction with the adjustment arm.