US 11,865,267 B2
Vent arrangement for respiratory mask
David Brent Sears, Woodland Hills, CA (US); Steven Paul Farrugia, Sydney (AU); Aleksandr S. Nagorny, Canoga Park, CA (US); Richard G Krum, Camarillo, CA (US); and Joseph M Sampietro, Tarzana, CA (US)
Assigned to ResMed Pty Ltd
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on Feb. 19, 2021, as Appl. No. 17/179,484.
Application 15/999,175 is a division of application No. 13/967,609, filed on Aug. 15, 2013, granted, now 10,076,619, issued on Sep. 18, 2018.
Application 17/179,484 is a continuation of application No. 15/999,175, filed on Aug. 17, 2018, granted, now 10,960,159.
Claims priority of provisional application 61/699,520, filed on Sep. 11, 2012.
Prior Publication US 2021/0178095 A1, Jun. 17, 2021
Int. Cl. A61M 16/20 (2006.01); A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61M 16/06 (2006.01); F16K 5/04 (2006.01); F16K 11/072 (2006.01); F16K 11/087 (2006.01); A61M 16/16 (2006.01); A61M 16/10 (2006.01)
CPC A61M 16/205 (2014.02) [A61M 16/00 (2013.01); A61M 16/009 (2013.01); A61M 16/0057 (2013.01); A61M 16/0069 (2014.02); A61M 16/024 (2017.08); A61M 16/20 (2013.01); F16K 5/0407 (2013.01); F16K 11/072 (2013.01); F16K 11/0873 (2013.01); A61M 16/0066 (2013.01); A61M 16/06 (2013.01); A61M 16/0672 (2014.02); A61M 16/0816 (2013.01); A61M 16/0825 (2014.02); A61M 16/0875 (2013.01); A61M 16/1095 (2014.02); A61M 16/16 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/0033 (2013.01); A61M 2205/3569 (2013.01); A61M 2205/3592 (2013.01); A61M 2205/42 (2013.01); A61M 2205/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for automated control of gas washout of a patient interface of a respiratory treatment apparatus, the system comprising:
a vent assembly having a variable exhaust area, wherein the vent assembly is associated with the patient interface and configured to vent expiratory gas, wherein the vent assembly comprises a radial exhaust revolver and a conduit casing, and wherein a peripheral edge of the radial exhaust revolver comprises one or more raised edges and one or more lowered edges; and
an actuator configured to manipulate an orientation of the radial exhaust revolver to vary the exhaust area.