US 12,220,528 B2
Patient interface with venting
Brett John Huddart, Auckland (NZ); Ronald Gane, Auckland (NZ); Callum Ross Gordon, Auckland (NZ); Mark Andrew Thompson, Auckland (NZ); and Thomas Mark Richardson, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on Dec. 28, 2020, as Appl. No. 17/134,995.
Application 17/134,995 is a continuation of application No. 14/769,674, granted, now 10,898,662, previously published as PCT/NZ2014/000021, filed on Feb. 21, 2014.
Claims priority of provisional application 61/767,586, filed on Feb. 21, 2013.
Claims priority of provisional application 61/845,102, filed on Jul. 11, 2013.
Prior Publication US 2021/0113788 A1, Apr. 22, 2021
Int. Cl. A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/08 (2006.01); A61M 16/10 (2006.01); A61M 16/20 (2006.01)
CPC A61M 16/0003 (2014.02) [A61M 16/06 (2013.01); A61M 16/0683 (2013.01); A61M 16/0825 (2014.02); A61M 16/1065 (2014.02); A61M 16/0616 (2014.02); A61M 16/0633 (2014.02); A61M 16/0866 (2014.02); A61M 16/208 (2013.01); A61M 2205/42 (2013.01); A61M 2205/75 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A patient interface assembly comprising:
a mask body portion adapted to create at least a substantial seal with facial surfaces around a nose and/or mouth of a patient;
a mask frame supporting the mask body portion;
a bias flow vent configured to vent exhaled gases from the patient, in use, from an interior to an exterior of the patient interface assembly, the bias flow vent comprising:
a plurality of vent holes extending through a first wall portion of the patient interface assembly, each vent hole comprising:
a vent hole entrance on an inner side of the first wall portion and a vent hole exit on an outer side of the first wall portion, the outer side comprising an outer side surface extending between the plurality of vent holes;
a vent hole length extending from the vent hole entrance to the vent hole exit;
a second wall portion positioned in front of the vent hole exits of the plurality of vent holes;
a fibrous media positioned between the second wall portion and the outer side surface of the first wall portion, the fibrous media comprising a first side facing toward the vent hole exits and spaced apart from the outer side surface of the first wall portion by at least a first spacing.