US 10,376,669 B2
Ventless mask CPAP system
Karthikeyan Selvarajan, Sydney (AU); Philip Rodney Kwok, Sydney (AU); Barton John Kenyon, Sydney (AU); Bruce David Gregory, Sydney (AU); Nicholas Jerome Reed, Sydney (AU); and Christopher Kingsley Blunsden, Sydney (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista, New South Wales (AU)
Filed on Aug. 27, 2014, as Appl. No. 14/470,492.
Application 14/470,492 is a continuation of application No. 11/887,547, granted, now 8,844,529, previously published as PCT/AU2006/000417, filed on Mar. 29, 2006.
Claims priority of provisional application 60/667,052, filed on Apr. 1, 2005.
Claims priority of provisional application 60/706,430, filed on Aug. 9, 2005.
Claims priority of provisional application 60/775,334, filed on Feb. 22, 2006.
Prior Publication US 2014/0366877 A1, Dec. 18, 2014
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/06 (2006.01); A61M 16/22 (2006.01); A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61M 16/20 (2006.01); A61M 16/10 (2006.01)
CPC A61M 16/22 (2013.01) [A61M 16/0009 (2014.02); A61M 16/0012 (2014.02); A61M 16/024 (2017.08); A61M 16/06 (2013.01); A61M 16/0622 (2014.02); A61M 16/0633 (2014.02); A61M 16/0672 (2014.02); A61M 16/0825 (2014.02); A61M 16/0883 (2014.02); A61M 16/202 (2014.02); A61M 16/0066 (2013.01); A61M 16/0093 (2014.02); A61M 16/1055 (2013.01); A61M 16/1065 (2014.02); A61M 2016/0027 (2013.01); A61M 2016/0039 (2013.01); A61M 2206/14 (2013.01); A61M 2230/432 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A CPAP system comprising:
a mask provided to a patient in use, the mask including a breathing chamber;
a flow generator in communication with the mask;
a positive pressure line to provide positive pressure air from the flow generator to the mask; and
a vacuum or return line provided to actively extract and/or remove gas exhausted by the patient,
wherein the vacuum or return line is configured and positioned to direct the gas exhausted by the patient to the flow generator without recirculation to the patient, and
the vacuum or return line is in communication with a vent outlet provided on the flow generator.