US 12,144,930 B2
Humidifier
Jonathan Mark Church, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on Dec. 21, 2022, as Appl. No. 18/069,903.
Application 15/787,044 is a division of application No. 14/232,210, granted, now 9,802,023, issued on Oct. 31, 2017, previously published as PCT/NZ2012/000122, filed on Jul. 11, 2012.
Application 18/069,903 is a continuation of application No. 17/060,572, filed on Oct. 1, 2020, granted, now 11,559,654.
Application 17/060,572 is a continuation of application No. 15/787,044, filed on Oct. 18, 2017, granted, now 10,828,457, issued on Nov. 10, 2020.
Claims priority of provisional application 61/507,896, filed on Jul. 14, 2011.
Prior Publication US 2023/0191070 A1, Jun. 22, 2023
Int. Cl. A61M 16/16 (2006.01); A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61M 16/10 (2006.01); A61M 16/14 (2006.01)
CPC A61M 16/16 (2013.01) [A61M 16/024 (2017.08); A61M 16/0875 (2013.01); A61M 16/1075 (2013.01); A61M 16/109 (2014.02); A61M 16/1095 (2014.02); A61M 16/142 (2014.02); A61M 16/107 (2014.02); A61M 2205/3633 (2013.01); A61M 2205/364 (2013.01); F04C 2270/0421 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A device for humidifying breathing gas comprising:
a coaxial tubing arrangement comprising an inner tube and an outer tube, the inner tube defining a gas transport pathway, the gas transport pathway comprising an inlet and an outlet, the outer tube surrounding at least a section of the inner tube, the inlet being configured to connect to a gas supply and the outlet being configured to connect to a user interface or a user gas delivery device
a reservoir being defined between the inner tube and the outer tube,
the outer tube being configured to contain a source of a humidifying fluid, the source of the humidifying fluid being pre-charged into the coaxial tubing arrangement by adding a predetermined volume of the humidifying fluid prior to use, and
the inner tube comprising a wall comprising a breathable material, the breathable material allowing passage of a vapor of the humidifying fluid to a gas passing through the gas transport pathway defined by the inner tube.