Patent ID: 11857727
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A patient interface device, comprising:
a cushion member having a central opening;
a patient circuit adapted to be coupled to the cushion member at the central opening;
a frame member coupled to the cushion; and
a headgear assembly adapted to be selectively coupled to the frame member, wherein the frame member includes:
a central member coupled to the cushion and having a generally arcuate shape adapted to span a portion of the cushion generally proximate to the central opening,
a first arm member having a first axis, a first end coupled to a first end of the central member, and a second end, wherein the first arm member extends from the first end of the central member,
a second arm member having a second axis, a first end coupled to a second end of the central member, and a second end, wherein the second arm member extends from the second end of the central member, and wherein the first axis of the first arm member and the second axis of the second arm member are generally disposed in common plane responsive to the patient interface assembly being donned by a user,
a first branch member having a first branch member axis, a first end coupled to the second end of the first arm member, and a second end,
a second branch member having a second branch member axis, a first end also coupled to the second end of the first arm member, and a second end,
a third branch member having a third branch member axis, a first end coupled to the second end of the second arm member, and a second end,
a fourth branch member having a fourth branch member axis, a first end also coupled to the second end of the second arm member, and a second end,

wherein the central member, the first arm member, the second arm member, the first branch member, the second branch member, the third branch member, and the fourth branch member are generally strap-like structures,
wherein the headgear assembly is coupled to the second end of the first branch member, the second end of the second branch member, the second end of the third branch member, and the second end of the fourth branch member,
wherein the first arm member spans at least a portion of a first side of the user's face and the second arm member spans at least a portion of a second side of the user's face opposite the first side of the user's face responsive to the patient interface assembly being donned by the user,
wherein the first branch member and the third branch member are positioned above the user's ears responsive to the patient interface assembly being donned by the user,
wherein the second branch member and the fourth branch member are positioned below the user's ears responsive to the patient interface assembly being donned by the user,
wherein the first axis of the first arm member and the first branch member axis are disposed at an angle α relatively to one another, wherein the second axis of the second arm member and the third branch member axis are also disposed the angle α relative to one another, and wherein the angle α has a range of 58-68 degrees, and
wherein the first axis of the first arm member and the second branch member axis are disposed at an angle θ relatively to one another, wherein the second axis of the second arm member and the fourth branch member axis are also disposed the angle θ relative to one another, and wherein the angle θ has a range of 39-49 degrees.