US 12,420,050 B2
Heat and moisture exchanger for a patient interface
Matthew Rolf Harrington, Gosford (AU)
Assigned to ResMed Pty Ltd
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on Jul. 1, 2024, as Appl. No. 18/760,596.
Application 18/760,596 is a continuation of application No. 18/080,215, filed on Dec. 13, 2022, granted, now 12,059,530.
Application 18/080,215 is a continuation of application No. 17/084,741, filed on Oct. 30, 2020, granted, now 11,554,239, issued on Jan. 17, 2023.
Application 17/084,741 is a continuation of application No. 15/930,597, filed on May 13, 2020, granted, now 11,596,760, issued on Mar. 7, 2023.
Application 15/930,597 is a continuation of application No. 14/908,280, granted, now 10,695,521, issued on Jun. 30, 2020, previously published as PCT/AU2014/050154, filed on Jul. 29, 2014.
Claims priority of application No. 2013902810 (AU), filed on Jul. 29, 2013; and application No. 613874 (NZ), filed on Aug. 7, 2013.
Prior Publication US 2024/0358960 A1, Oct. 31, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06V 10/00 (2022.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/10 (2006.01); A61M 16/16 (2006.01)
CPC A61M 16/1045 (2013.01) [A61M 16/0057 (2013.01); A61M 16/026 (2017.08); A61M 16/06 (2013.01); A61M 16/16 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/0036 (2013.01); A61M 16/0683 (2013.01); A61M 16/1055 (2013.01); A61M 16/107 (2014.02); A61M 16/109 (2014.02); A61M 2205/21 (2013.01); A61M 2205/3365 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3653 (2013.01); A61M 2205/52 (2013.01); A61M 2205/8206 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A heat and moisture exchanger (HMX) device for heat and/or humidifying pressurized air directed to a patient's airways during respiratory therapy with a patient interface, the HMX device comprising:
a water-absorbent HMX material having a concave-shaped posterior side configured to face the patient and avoid contact with the patient in use; and
a frame comprising:
a front retention member positioned on a front side of the frame and partly forming first frame apertures, the water-absorbent HMX material being exposed through the first frame apertures;
second frame apertures that are smaller than the first frame apertures, the water-absorbent HMX material being exposed through the second frame apertures; and
a rear retention member positioned on a rear side of the frame, the front retention member and the rear retention member retaining the water-absorbent HMX material inside of the frame.