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US 2006/0213520 A1Published application
Mask with gusset
AssigneeResMed Limited
InventorsRobert Frater, Joanne Drew, Michael Gunaratnam
Life of this patent
Estimating the term…
Abstract
A mask system for delivering air to a user includes a suspension mechanism to allow relative movement between a face-contacting cushion and a mask shell. The suspension mechanism also provides a predetermined force to the cushion that is a function of mask pressure, displacement of the cushion or both.
Claims18
1-74. (canceled)
A mask assembly attachable to a user for receiving and supplying pressurized air to the user, comprising:
- a cushion for contacting a user's face;
- and
- a suspension mechanism axially movably supporting the cushion and exposed to the pressurized air to provide a first axial spring force to the cushion proportional to a pressure of the air, the first axial spring force being at least 30% greater than a second axial spring force on the cushion due to the pressurized air acting directly on the cushion.
A mask assembly attachable to a user for receiving and supplying pressurized air to the user, comprising:
- a mask shell;
- a cushion for contacting a user's face and having a first projected area on the user's face;
- and
- a suspension mechanism attached to the mask shell axially movably supporting the cushion and having a second projected area on the user's face greater than the first projected area on the face by at least 30%.
1 more element
81-124. (canceled)
A breathable gas mask arrangement, comprising:
- a mask shell having a portion adapted to receive a supply of pressurized breathable gas and a user side;
- a gusset portion having a first side attached to the user side of the shell and having a second side;
- a cushion having a first portion attached to the second side of the gusset portion and a second portion constructed and arranged to contact a user's face in use and provide a seal between the mask arrangement and the user's face;
- and
- wherein:
- a distance between the mask shell and the cushion is variable, and
- the gusset portion defines a projected area on the user's face that is variable in dependence on the distance between the mask shell and the cushion.
4 more elements
Dependencies are inferred from the claim text.