US 12,318,542 B2
Mask vent
Robert Thomas Burnham, Sydney (AU); Nicolas Lo Grandjean-Thomsen, Sydney (AU); and Martin Kang, Sydney (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on May 7, 2021, as Appl. No. 17/314,126.
Application 17/314,126 is a continuation of application No. 16/111,306, filed on Aug. 24, 2018, granted, now 11,007,337.
Application 16/111,306 is a continuation of application No. 13/985,737, granted, now 10,086,160, issued on Oct. 2, 2018, previously published as PCT/AU2012/000143, filed on Feb. 15, 2012.
Claims priority of provisional application 61/628,300, filed on Oct. 28, 2011.
Claims priority of provisional application 61/443,422, filed on Feb. 16, 2011.
Prior Publication US 2021/0260321 A1, Aug. 26, 2021
Int. Cl. A61M 16/06 (2006.01); A61M 16/08 (2006.01); A61M 16/20 (2006.01)
CPC A61M 16/06 (2013.01) [A61M 16/0816 (2013.01); A61M 16/0866 (2014.02); A61M 16/20 (2013.01); A61M 2205/42 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of manufacturing a mask for use in positive airway pressure treatment of sleep disordered breathing, the mask being configured to receive a supply of air or other breathable gas pressurized above atmospheric pressure to an interior of the mask, the method comprising:
forming a vent in a tool movable along a line of draw, the vent configured to discharge exhaled gas from the interior of the mask to atmosphere during treatment when the interior of the mask receives the supply of air or other breathable gas pressurized above atmospheric pressure,
wherein the vent comprises:
a top wall;
a bottom wall;
a plurality of supports disposed between the top wall and the bottom wall; and
a plurality of vent passageways formed between the plurality of supports configured to allow discharge of exhaled gas from the interior of the mask to atmosphere during treatment when the interior of the mask receives the supply of air or other breathable gas pressurized above atmospheric pressure,
wherein the bottom wall comprises an inner side face leading to the plurality of vent passageways, and
wherein each of the plurality of supports includes an outer side face in contact with the inner side face of the bottom wall; and
shaping the inner side face to be angled inwardly toward a central axis of the vent to permit the line of draw for the tool.