US 11,717,628 B2
Patient interface with a seal-forming structure having varying thickness
Matthew Eves, Sydney (AU); Lemmy Nga, Sydney (AU); Gerard Michael Rummery, Woodford (AU); and Rupert Christian Scheiner, Sydney (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on Dec. 17, 2020, as Appl. No. 17/124,578.
Application 17/124,578 is a continuation of application No. 15/761,168, granted, now 10,926,050, previously published as PCT/AU2016/050895, filed on Sep. 23, 2016.
Claims priority of provisional application 62/377,158, filed on Aug. 19, 2016.
Claims priority of provisional application 62/222,503, filed on Sep. 23, 2015.
Claims priority of application No. PCT/AU2016/050228 (WO), filed on Mar. 24, 2016.
Prior Publication US 2021/0100970 A1, Apr. 8, 2021
Int. Cl. A61M 16/06 (2006.01); A61M 16/08 (2006.01); A61M 16/00 (2006.01); A61M 16/10 (2006.01); A61M 16/16 (2006.01)
CPC A61M 16/0622 (2014.02) [A61M 16/0066 (2013.01); A61M 16/06 (2013.01); A61M 16/0611 (2014.02); A61M 16/0616 (2014.02); A61M 16/0633 (2014.02); A61M 16/0666 (2013.01); A61M 16/0683 (2013.01); A61M 16/0825 (2014.02); A61M 16/0069 (2014.02); A61M 16/0875 (2013.01); A61M 16/107 (2014.02); A61M 16/109 (2014.02); A61M 16/1055 (2013.01); A61M 16/1095 (2014.02); A61M 16/16 (2013.01); A61M 2202/0225 (2013.01); A61M 2205/42 (2013.01); A61M 2207/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cushion assembly for a patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to a patient's airways including at least entrance of the patient's nares, wherein the patient interface is configured to maintain a therapy pressure in a range of about 4 cmH2O to about 30 cmH2O above ambient air pressure in use, throughout the patient's respiratory cycle, while the patient is sleeping, to ameliorate sleep disordered breathing, the cushion assembly comprising:
an elastomeric support portion; and
an elastomeric seal-forming structure that is supported by the elastomeric support portion, the elastomeric support portion being more rigid than the elastomeric seal-forming structure, wherein the elastomeric seal-forming structure comprises:
a nasal bridge region configured to seal against the patient's nasal bridge when the cushion assembly is mounted to the patient's face,
a compliant region configured to seal against a side of the patient's nose when the cushion assembly is mounted to the patient's face, and
a support region located between the nasal bridge region and the compliant region,
wherein the wall thickness of the elastomeric seal-forming structure is greater in the support region than in the nasal bridge and compliant regions,
wherein the support region is tapered so that the wall thickness of the elastomeric seal-forming structure in the support region increases in a direction toward the elastomeric support portion, and
wherein the compliant region transitions into a loop that is anchored to the elastomeric support portion.