Mask system

A patient interface system configured to deliver a flow of positive pressure breathable gas to a patient's airways, the patient interface system comprising:

• a cushion configured to sealingly engage the patient's face;
• a frame attached to the cushion and defining at least part of a breathing chamber configured to receive the patient's nose, the frame comprising an opening configured to receive the flow of positive pressure breathable gas from an air delivery tube;
• headgear comprising a back portion, a pair of upper headgear straps extending from the back portion, and a pair of lower headgear straps extending from the back portion;
• a pair of upper headgear connectors configured to be releasably attached to the pair of upper headgear straps, each of the upper headgear connectors comprising an upper arm configured to add rigidity to the respective upper headgear connector, a fabric sleeve that envelops the upper arm, and a shoulder that limits a movement of the fabric sleeve toward the other upper headgear connector;
• and
• and a pair of lower headgear connectors configured to be releasably attached to the pair of lower headgear straps,
• wherein the pair of upper headgear connectors and the pair of lower headgear connectors are configured to be removably secured to the frame as a unit, and
• wherein the upper headgear connectors and the lower headgear connectors are configured to be secured to the frame by a lug and recess connection that comprises at least one recess and at least one lug configured to be received in the at least one recess at a rim of the opening in the frame and as the pair of upper headgear connectors and the pair of lower headgear connectors are secured to the frame.

A patient interface system configured to deliver a flow of positive pressure breathable gas to a patient's airways, the patient interface system comprising:

• a cushion configured to sealingly engage the patient's face;
• a frame attached to the cushion and defining at least part of a breathing chamber configured to receive the patient's nose, the frame comprising an opening configured to receive the flow of positive pressure breathable gas from an air delivery tube;
• headgear comprising a back portion, a pair of upper headgear straps extending from the back portion, and a pair of lower headgear straps extending from the back portion;
• a pair of rigidiser arms extending from the frame, the pair of rigidiser arms including a pair of headgear attachment points configured for releasable attachment to a corresponding one of the pair of upper headgear straps, each of the rigidiser arms being enveloped by a fabric sleeve and comprising a shoulder that limits a movement of the fabric sleeve toward the other rigidiser arm;
• and
• a pair of lower headgear connectors comprising a pair of lower arms configured for releasable attachment to a corresponding one of the pair of lower headgear straps, each of the pair of lower headgear connectors being configured to flex toward the frame,
• wherein the pair of rigidiser arms and the pair of lower headgear connectors are configured to be secured to the frame as a unit by way of a lug and recess arrangement at a lower portion of patient interface,
• wherein the lug and recess arrangement comprises at least one recess and at least one lug configured to be received in the at least one recess at a rim of the opening in the frame and as the pair of rigidiser arms and the pair of lower headgear connectors are secured to the frame, and
• wherein the patient interface system does not include a forehead support.