Respiratory mask

A respiratory mask for delivering an inhalation fluid to the airways of a wearer, the respiratory mask comprising:

• a body of generally concave shape and having a peripheral edge, the body having a mouth portion and a nose portion adapted to provide a cavity in use about the mouth and nose of the wearer such that the inhalation fluid can be inhaled by the wearer from the cavity, the body having an inlet port that is engageable with a supply of inhalation fluid and in communication with the cavity;
• and
• a resilient seal formation depending from at least a portion of the peripheral edge of the body, the resilient seal formation comprising both an inwardly and outwardly depending lip portion relative to the peripheral edge of the body, the inwardly depending lip portion depending into the cavity and being arranged to pass closely beneath the mandible of a first wearer having a first facial dimension, such that the first wearer's nose and lower jaw can be simultaneously located within the peripheral edge of the mask, to thereby provide a first fitment condition for the first wearer, the outwardly depending lip portion being arranged to pass closely beneath the mandible of a second wearer having a second facial dimension relatively larger than the first facial dimension of the first wearer, such that the second wearer's nose and lower jaw cannot be simultaneously located within the peripheral edge of the body, to thereby provide a second fitment condition for the second wearer, wherein the inwardly depending lip portion extends around the entire peripheral edge of the mask body, the peripheral edge being between the inwardly depending lip portion and the body, and the mouth portion comprising a forward-facing front wall, and a laterally-extending sill formation, the front wall comprising a step extending laterally from an intermediate wall portion of the front wall, the front wall adjoining the sill formation at the intermediate wall portion, wherein the sill formation is arranged to pass beneath the first wearer's mandible and an interior face of the intermediate wall portion provides an upstanding wall surface of the front wall for abutment against a frontal portion of said first wearer's chin.

A respiratory mask for delivering an inhalation fluid to the airways of a wearer, the respiratory mask comprising:

• a body of generally concave shape and having a peripheral edge, the body having a mouth portion and a nose portion adapted to provide a cavity in use about both the mouth and nose of the wearer such that the inhalation fluid can be inhaled by the wearer from the cavity, wherein the depth of the cavity defined by the nose portion is greater than the depth of the cavity defined by the mouth portion, the body having an inlet port that is engageable with a supply of inhalation gas and in communication with the cavity;
• a resilient seal formation depending from at least a portion of the peripheral edge, the resilient seal formation comprising both a first and a second lip portion relative to the peripheral edge of the body, the first lip portion depending inwardly from the peripheral edge of the body into the cavity and being arranged to pass closely beneath the mandible of a first wearer having a first facial dimension such that the first wearer's nose and lower jaw can be simultaneously located within the peripheral edge of the mask, the second lip portion depending outwardly from the peripheral edge of the body and being arranged to pass closely beneath the mandible of a second wearer having a second facial dimension, relatively larger than the first facial dimension of the first wearer such that the second wearer's nose and lower jaw cannot be simultaneously located within the peripheral edge of the mask, and the mouth portion comprising a forward-facing front wall, and a laterally-extending sill formation, the front wall comprising a step extending laterally from an intermediate wall portion of the front wall and, the front wall adjoining the sill formation at the intermediate wall portion, wherein the sill formation is arranged to pass beneath the first wearer's mandible and an interior face of the intermediate wall portion provides an upstanding wall surface of the front wall for abutment against a frontal portion of said first wearer's chin.