Mask system with snap-fit shroud

A mask system for delivery of a supply of gas at positive pressure to a patient for medical treatment, the mask system comprising:

• a shroud module acting as a carrier having a bearing surface;
• a cushion module that is snap-fit to the shroud module and adapted to seal against the patient's face in use;
• and
• an elbow module connected to the shroud module, the elbow module being rotatably attached to the bearing surface of the carrier such that, in use, the elbow module is rotatable 360° relative to the shroud module, and the elbow module is adapted to be connected to an air delivery tube that delivers the supply of gas at positive pressure to the patient,
• wherein the cushion module includes a frame and a cushion, the frame and the cushion at least partly forming a breathing chamber when the cushion contacts the patient's face in use,
• wherein the frame and the cushion together comprise an integrated component, the frame being constructed from a relatively rigid material adapted to directly contact the shroud module when the shroud module is attached to the frame, and the cushion being constructed from a relatively flexible silicone material adapted to interface with patient's face in use,
• wherein the shroud module and the frame are shaped such that the shroud module and the frame are not rotatable relative to one another when the shroud module and the frame are attached,
• wherein the relatively rigid material is a more rigid material than the relatively flexible silicone material,
• wherein the shroud module includes a part-annular retaining portion that is structured to retain the frame and the elbow module, and
• wherein the part-annular retaining portion includes a pair of first interfacing structures and the frame includes a pair of second interfacing structures, the first interfacing structures being structured to removably connect to corresponding ones of the second interfacing structures to snap-fit the cushion module to the shroud module.

A mask system for delivery of a supply of gas at positive pressure to a patient for medical treatment, the mask system comprising:

• a shroud module acting as a carrier having a bearing surface;
• a cushion module that is snap-fit to the shroud module and adapted to seal against the patient's face in use;
• and
• an elbow module connected to the shroud module, the elbow module being rotatably attached to the bearing surface of the carrier such that, in use, the elbow module is rotatable 360° relative to the shroud module, and the elbow module is adapted to be connected to an air delivery tube that delivers the supply of gas at positive pressure to the patient,
• wherein the cushion module includes a frame and a cushion, the frame and the cushion at least partly forming a breathing chamber when the cushion contacts the patient's face in use,
• wherein the frame and the cushion together comprise an integrated component, the frame being constructed from a relatively rigid material adapted to directly contact the shroud module when the shroud module is attached to the frame, and the cushion being constructed from a relatively flexible silicone material adapted to interface with patient's face in use,
• wherein the shroud module and the frame are shaped such that the shroud module and the frame are not rotatable relative to one another when the shroud module and the frame are attached,
• wherein the relatively rigid material is a more rigid material than the relatively flexible silicone material
• wherein the shroud module includes a pair of upper headgear connectors and a pair of lower headgear connectors configured to connect with the headgear,
• wherein the headgear is removably attachable to the upper headgear connectors and the lower headgear connectors to maintain the cushion module in a sealing position on the patient's face in use,
• wherein the headgear includes a pair of upper straps and a pair of lower straps with the upper straps removably attachable to respective ones of the upper headgear connectors and the lower straps removably attachable to respective ones of the lower headgear connectors, each of the upper straps and each of the lower straps having a free end and a tab portion proximate the free end, and the tab portion structured to adjustably engage a remainder of a corresponding one of the upper straps and the lower straps with a hook and loop connection to removably secure the corresponding one of the upper straps and the lower straps in place, and
• wherein the shroud module includes a pair of arms, each of the arms having a free end and a slot at the free end that forms one of the upper headgear connectors, the slot being adapted to receive a respective headgear strap of the headgear, each of the arms being semi-rigid to stabilize the cushion module against the patient's face in use, and each of the arms being shaped to extend between corresponding ones of the patient's eyes and ears in use.

A mask system for delivery of a supply of gas at positive pressure to a patient for medical treatment, the mask system comprising:

• a shroud module;
• a cushion module connected to the shroud module and adapted to seal against the patient's face in use;
• an elbow module rotatably attached to the shroud module such that the shroud module acts as a carrier and bearing surface for the elbow module and the elbow module is rotatable 360° relative to the shroud module in use, and the elbow module being adapted to be connected to an air delivery tube that delivers the supply of gas at positive pressure to the patient;
• and
• headgear removably attachable to the shroud module to maintain the cushion module in a sealing position on the patient's face,
• wherein the cushion module includes a frame and a cushion, the frame and the cushion at least partly forming a breathing chamber when the cushion contacts the patient's face in use,
• wherein the shroud module and the frame are shaped to inhibit relative rotation when the shroud module is attached to the frame,
• wherein an outer portion of the frame remains uncovered by the shroud module when the shroud module is attached to the frame,
• wherein the frame and cushion together comprise an integrated component, the frame being constructed from a relatively rigid material that interfaces with the shroud module when the shroud module is attached to the frame, the cushion being constructed from a relatively flexible silicone material that contacts the patient's face in use, and the relatively rigid material of the frame being a more rigid material than the relatively flexible silicone material of the cushion,
• wherein the shroud module includes a pair of upper headgear connectors and a pair of lower headgear connectors configured to connect with the headgear,
• wherein the headgear is removably attachable to the upper headgear connectors and the lower headgear connectors to maintain the cushion module in a sealing position on the patient's face in use, and
• wherein the headgear includes a pair of upper straps and a pair of lower straps with the upper straps removably attachable to respective ones of the upper headgear connectors and the lower straps removably attachable to respective ones of the lower headgear connectors, each of the upper straps and each of the lower straps having a free end and a tab portion proximate the free end, and the tab portion structured to adjustably engage a remainder of a corresponding one of the upper straps and the lower straps with a hook and loop connection to removably secure the corresponding one of the upper straps and the lower straps in place, and
• wherein the shroud module includes a pair of arms, each of the arms having a free end and a slot at the free end that forms one of the upper headgear connectors, the slot being adapted to receive a respective headgear strap of the headgear, each of the arms being semi-rigid to stabilize the cushion module against the patient's face in use, and each of the arms being shaped to extend between corresponding ones of the patient's eyes and ears in use.