US 12,168,100 B2
Humidifier and layered heating element
Zhuo Tang, Sydney (AU); Ronald James Huby, Sydney (AU); Hargopal Verma, Sydney (AU); Andrew Bath, Sydney (AU); and Roger Mervyn Lloyd Foote, Sydney (AU)
Assigned to ResMed Pty Ltd, Bella Vista (AU)
Filed by ResMed Pty Ltd, Bella Vista (AU)
Filed on Nov. 18, 2022, as Appl. No. 17/989,798.
Application 17/989,798 is a continuation of application No. 17/182,430, filed on Feb. 23, 2021, granted, now 11,504,495.
Application 17/182,430 is a continuation of application No. 16/743,156, filed on Jan. 15, 2020, granted, now 10,940,285, issued on Mar. 9, 2021.
Application 16/743,156 is a continuation of application No. 15/816,688, filed on Nov. 17, 2017, granted, now 10,549,064, issued on Feb. 4, 2020.
Application 15/816,688 is a continuation of application No. 14/126,687, granted, now 9,821,135, issued on Nov. 21, 2017, previously published as PCT/AU2012/000693, filed on Jun. 15, 2012.
Claims priority of provisional application 61/628,622, filed on Nov. 3, 2011.
Claims priority of application No. 2011902350 (AU), filed on Jun. 16, 2011.
Prior Publication US 2023/0085432 A1, Mar. 16, 2023
Int. Cl. A61M 16/16 (2006.01); A61M 16/00 (2006.01); A61M 16/10 (2006.01); B01F 23/20 (2022.01); B01F 23/23 (2022.01); H05B 3/28 (2006.01)
CPC A61M 16/16 (2013.01) [A61M 16/022 (2017.08); A61M 16/1075 (2013.01); A61M 16/109 (2014.02); B01F 23/20 (2022.01); B01F 23/23 (2022.01); H05B 3/28 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3653 (2013.01); H05B 2203/002 (2013.01); H05B 2203/013 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A humidifier for humidifying a pressurized flow of breathable gas for respiratory therapy for a patient, comprising:
a gas inlet configured to receive gas from a flow generator;
a tub adapted to hold a liquid, the tub including sidewalls and a bottom;
a gas outlet adapted to be connectable to a tube to provide humidified gas to a patient interface; and
a heating apparatus including:
a heating element which converts electrical power to heat energy; and
an overmold comprising a thermally conductive plastic material, the overmold including: 1) a bottom wall overmolded onto the bottom of the tub and disposed between a first side of the heating element and the bottom of the tub, and 2) an intermediate wall configured to be disposed between a second side of the heating element and the liquid, during use, such that the heating element is embedded in the overmold; and
a thermally conductive hot plate having a first surface and a second surface, the first surface of the hot plate being arranged to receive the heat energy from the heating element, the second surface of the hot plate being configured and arranged to heat the liquid in the tub.