Mask with gusset
First Claim
Patent Images
1. 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
headgear constructed and arranged to attach the mask shell to the user;
wherein the gusset portion is constructed and arranged such that it can expand and contract to alter a distance between the mask shell and the cushion in use, the distance being within a range of movement of the gusset portion that is greater than 0 mm and less than 30 mm, and wherein an interior of the gusset portion is exposed to the supply of pressurized breathable gas and has a projected area on the user'"'"'s face Ag that is greater than an area Ac of contact of the cushion with the user'"'"'s face such that the supply of pressurized breathable gas acting on the area Ag provides a component of a contact force Fc of the cushion on the user'"'"'s face, and a ratio of Ag/Ac is greater than 1.6 and less than 4.0.
4 Assignments
0 Petitions
Accused Products
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.
181 Citations
12 Claims
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1. A breathable gas mask arrangement, comprising:
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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
headgear constructed and arranged to attach the mask shell to the user;
wherein the gusset portion is constructed and arranged such that it can expand and contract to alter a distance between the mask shell and the cushion in use, the distance being within a range of movement of the gusset portion that is greater than 0 mm and less than 30 mm, and wherein an interior of the gusset portion is exposed to the supply of pressurized breathable gas and has a projected area on the user'"'"'s face Ag that is greater than an area Ac of contact of the cushion with the user'"'"'s face such that the supply of pressurized breathable gas acting on the area Ag provides a component of a contact force Fc of the cushion on the user'"'"'s face, and a ratio of Ag/Ac is greater than 1.6 and less than 4.0. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A breathable gas mask arrangement, comprising:
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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
headgear constructed and arranged to attach the mask shell to the user;
wherein the gusset portion includes an elastic sidewall having a spring constant that is at least partially determinative of a force applied to the patient'"'"'s face through the second portion of the cushion. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification