# US 2026/0061149 A1 · Air delivery conduit

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- Number: US 2026/0061149 A1
- Document ID: US20260061149A1
- Status: Published application
- Kind: A1
- Application number: 19/385,325
- Filed: 2025-11-11
- Published: 2026-03-05
- Earliest claimed: 2019-05-20
- Assignees: ResMed Asia Pte. Ltd.
- Applicants: Resmed Asia Pte. Ltd.
- Inventors: Angelene Marie OZOLINS; Beng Hai TAN; Mohankumar Krishnan VALIYAMBATH; Sok Li GOH
- Web page: https://patentgrep.com/patent/US20260061149A1

## CPC

- A61M 16/0875: {Connecting tubes}
- A61M 16/0066: {Blowers or centrifugal pumps}
- A61M 16/022: {Control means therefor}
- A61M 16/0611: {with a gusset portion}
- A61M 16/0616: {with face sealing means comprising a flap or membrane projecting inwards, such that sealing increases with increasing inhalation gas pressure}
- A61M 16/0622: {having an underlying cushion}
- A61M 16/0666: {Nasal cannulas or tubing (devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02)}
- A61M 16/0683: {Holding devices therefor}
- A61M 16/0816: {Joints or connectors}
- A61M 16/1005: {with O2 features or with parameter measurement}
- A61M 16/107: {in the inspiratory path}
- A61M 16/109: {the humidifying liquid or the beneficial agent}
- A61M 16/1095: {in the connecting tubes}
- A61M 16/125: {Diluting primary gas with ambient air}
- A61M 16/16: Devices to humidify the respiration air {(A61M16/1045 takes precedence)}
- A61M 16/208: {Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves}
- A61M 2016/0027: {pressure meter}
- A61M 2016/0039: {in the inspiratory circuit}
- A61M 2205/02: characterised by a particular materials
- A61M 2205/3334: Measuring or controlling the flow rate
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- A61M 2205/3368: Temperature
- A61M 2205/3653: by Joule effect, i.e. electric resistance
- A61M 2205/7518: bacterial
- A61M 2207/00: Methods of manufacture, assembly or production
- A61M 2207/10: Device therefor
- A61M 2210/0618: Nose
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

Methods of manufacturing components and devices for providing respiratory pressure therapy, and components manufactured according to the methods. Support structures are provided for the components. In embodiments, the support structures may be rigid rings. Alternatively, resilient materials are applied to components to create resilient reinforcing elements. The devices and components include conduits to deliver flows of pressurised gas to a patient interface, positioning and stabilising structures having headgear tubes with support elements, and patient interfaces including the conduits.

## Claims

### Claim 1

An air delivery conduit configured to convey a flow of air under pressure from a respiratory pressure therapy device to a patient interface for providing respiratory pressure therapy to a patient, the air delivery conduit comprising:
a flexible reinforcing structure comprising a plurality of support structures spaced apart along a length of the air delivery conduit; and
an air impermeable covering provided to the support structures along the length of the air delivery conduit, the covering forming a sealed air path through which the flow of air is able to be conveyed in use,
wherein the air impermeable covering comprises a textile layer that is in direct contact with each support structure,
wherein each support structure comprises an outer surface, an inner surface opposite the outer surface and a pair of intermediate faces connecting the outer surface and the inner surface, each support structure comprising a cross section having outer corners that connect the outer surface to the intermediate faces and engage the textile layer, and
wherein the outer corners are rounded to prevent tearing the textile layer.

### Claim 2 (depends on 1)

The air delivery conduit of claim 1, wherein the cross section of each support structure comprises inner rounded corners connecting the inner surface and the intermediate faces.

### Claim 3 (depends on 2)

The air delivery conduit of claim 2, wherein the outer rounded corners of each support structure comprise a greater radius of curvature than the inner rounded corners.

### Claim 4 (depends on 2)

The air delivery conduit of claim 2, wherein the outer rounded corners of each support structure comprise a radius of curvature equal to a radius of curvature of the inner rounded corners.

### Claim 5 (depends on 2)

The air delivery conduit of claim 2, wherein the outer rounded corners of each support structure comprise a lesser radius of curvature than the inner rounded corners.

### Claim 6 (depends on 1)

The air delivery conduit of claim 1, wherein each support structure comprises a pair of thickened portions on opposing sides of the support structure.

### Claim 7 (depends on 1)

The air delivery conduit of claim 1, wherein each support structure is formed as a ring member.

### Claim 8 (depends on 7)

The air delivery conduit of claim 7, wherein each ring member comprises an elliptical or circular outer profile.

### Claim 9 (depends on 1)

The air delivery conduit of claim 1, wherein each ring member comprises a non-circular inner profile.

### Claim 10 (depends on 9)

The air delivery conduit of claim 9, wherein each ring member comprises an elliptical inner profile.

### Claim 11 (depends on 10)

The air delivery conduit of claim 10, wherein each support structure comprises a pair of thickened portions on opposing sides of the support structure, and wherein each pair of thickened portions is opposing along a minor axis of the elliptical inner profile.

### Claim 12 (depends on 1)

The air delivery conduit of claim 1, wherein each support structure comprises a convex inner surface.

### Claim 13 (depends on 1)

The air delivery conduit of claim 1, wherein the air impermeable covering comprises:
a sealing layer provided to the flexible reinforcing structure;
a sheet wrapped around the flexible reinforcing structure, the sheet comprising a first edge and a second edge, each extending along the air delivery conduit, an outer side and an inner side, the inner side of the sheet comprising:
a first portion on a first side of the first edge proximate the first edge; and
a second portion proximate the first edge, on a second side of the first edge opposite the first side,
wherein the sealing layer seals between the first portion of the inner side of the sheet and the second portion of the inner side of the sheet.

### Claim 14 (depends on 13)

The air delivery conduit of claim 13, wherein the sealing layer is heat-bonded to the reinforcing structure and/or the sheet.

### Claim 15 (depends on 13)

The air delivery conduit of claim 13, wherein the sheet comprises an outer layer comprising a textile material.

### Claim 16 (depends on 1)

The air delivery conduit of claim 1, wherein the air impermeable covering forms a sealed air path through which the flow of air is able to be conveyed in use, the air impermeable covering having a first edge and a second edge each extending along the air delivery conduit, the first edge and second edge meeting or overlapping to form a seam, wherein air delivery conduit further comprises a sealing strip applied to the flexible reinforcing structure and sealing across an inner portion of the seam to prevent air leaking through the seam.

### Claim 17 (depends on 1)

The air delivery conduit of claim 1, wherein the air impermeable covering further comprises a sealing layer laminated to the textile layer, wherein the air impermeable covering is wrapped around the flexible reinforcing structure and comprises a first edge and a second edge, each extending along the air delivery conduit, an outer side and an inner side, the inner side of the covering comprising:
a first portion on a first side of the first edge proximate the first edge; and
a second portion proximate the first edge, on a second side of the first edge opposite the first side,
wherein a portion of the sealing layer extends beyond an edge of the textile layer at the first edge of the covering to form a sealing flap, the sealing flap being sealed to another portion of the sealing layer to seal between the first portion of the inner side of the covering and the second portion of the inner side of the covering.

### Claim 18 (depends on 1)

The air delivery conduit of claim 1, wherein the air delivery conduit further comprises a sealing layer forming a sealed air path through which the flow of air is able to be conveyed in use, wherein the flexible reinforcing structure is provided between the air impermeable covering and the sealing layer, and wherein the sealing layer comprises an inner film layer and an outer film layer.

### Claim 19 (depends on 1)

A patient interface assembly comprising:
a patient interface configured to sealingly engage a patient's face, in use; and the air delivery conduit of claim 1,
wherein the air delivery conduit is connected to, or connectable to, the patient interface to deliver pressurized respiratory gas to the patient interface.

### Claim 20 (depends on 1)

A respiratory therapy system configured to deliver pressurized respiratory gas to a patient's airways, the system comprising:
a respiratory therapy device configured to pressurize a flow of respiratory gas; and the air delivery conduit of claim 1,
wherein the air delivery conduit is connected to, or connectable to, the respiratory therapy device to receive the pressurized flow of respiratory gas from the respiratory therapy device.