US 11,998,698 B2
Respiratory mask
Amal Shirley Amarasinghe, Sydney (AU); Angelene Marie Ozolins, Sydney (AU); Lee James Veliss, Rotterdam (NL); Alicia Kristianne Wells, Sydney (AU); Eric Siu, Sydney (AU); Ian Fredrick Johnson, Sydney (AU); and Alison Ruth Norcott, Sydney (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on Feb. 9, 2023, as Appl. No. 18/166,884.
Application 18/166,884 is a continuation of application No. 16/365,724, filed on Mar. 27, 2019, granted, now 11,602,606.
Application 16/365,724 is a continuation of application No. 13/097,501, filed on Apr. 29, 2011, granted, now 10,265,492, issued on Apr. 23, 2019.
Claims priority of provisional application 61/330,039, filed on Apr. 30, 2010.
Claims priority of provisional application 61/418,037, filed on Nov. 30, 2010.
Prior Publication US 2023/0181858 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/06 (2006.01); A61M 16/08 (2006.01)
CPC A61M 16/0683 (2013.01) [A61M 16/06 (2013.01); A61M 16/0616 (2014.02); A61M 16/0633 (2014.02); A61M 16/0816 (2013.01); A61M 16/0858 (2014.02); A61M 2210/0618 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A patient interface system for delivering breathable gas to a patient, comprising:
a flexible patient interface structure arranged to interface with and deliver air to a nose of the patient in use, the patient interface structure comprising:
protrusions extending from respective opposite sides of the flexible patient interface structure, each protrusion being configured to receive the breathable gas from an air delivery tube or air delivery tube connector and having an outwardly extending circumferential flange at a terminal end; and
a central gas washout vent region located between the protrusions and comprising an array of vent openings, a wall thickness of flexible patient interface structure being thickened at the central gas washout vent region than other adjacent regions of the flexible patient interface structure so that a channel is formed between the circumferential flanges on the protrusions and the central gas washout vent region; and
a frame configured to support the patient interface structure, the frame comprising a pair of cylinders, each cylinder having an inner circumferential surface configured to receive a respective protrusion of the patient interface structure,
wherein the cylinders of the frame are configured to be received within the respective channels formed by the central gas washout vent region and the circumferential flanges.