US 12,156,969 B2
Respiratory gas humidifier
Igor Olegovich Yatsevich, Auckland (NZ); Andrew John Partington, Auckland (NZ); and Nordyn Alami, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on May 9, 2023, as Appl. No. 18/314,706.
Application 18/314,706 is a continuation of application No. 17/340,989, filed on Jun. 7, 2021, granted, now 11,679,221.
Application 17/340,989 is a continuation of application No. 16/835,832, filed on Mar. 31, 2020, granted, now 11,058,843, issued on Jul. 13, 2021.
Application 16/835,832 is a continuation of application No. 16/173,863, filed on Oct. 29, 2018, granted, now 10,639,446, issued on May 5, 2020.
Application 16/173,863 is a continuation of application No. 15/592,639, filed on May 11, 2017, granted, now 10,130,784, issued on Nov. 20, 2018.
Application 15/592,639 is a continuation of application No. 14/845,042, filed on Sep. 3, 2015, granted, now 9,649,468, issued on May 16, 2017.
Claims priority of provisional application 62/045,460, filed on Sep. 3, 2014.
Prior Publication US 2024/0001065 A1, Jan. 4, 2024
Int. Cl. A61M 16/08 (2006.01); A61M 16/00 (2006.01); A61M 16/10 (2006.01); A61M 16/16 (2006.01); B01F 23/21 (2022.01); B01F 35/90 (2022.01); F24F 3/14 (2006.01); A61M 16/20 (2006.01); B01F 101/55 (2022.01)
CPC A61M 16/0808 (2013.01) [A61M 16/0066 (2013.01); A61M 16/0875 (2013.01); A61M 16/1085 (2014.02); A61M 16/109 (2014.02); A61M 16/1095 (2014.02); A61M 16/16 (2013.01); A61M 16/161 (2014.02); B01F 23/21 (2022.01); B01F 35/90 (2022.01); F24F 3/14 (2013.01); A61M 2016/0027 (2013.01); A61M 2016/003 (2013.01); A61M 2016/0039 (2013.01); A61M 16/024 (2017.08); A61M 16/202 (2014.02); A61M 2205/3368 (2013.01); A61M 2205/3653 (2013.01); A61M 2205/8206 (2013.01); A61M 2230/04 (2013.01); A61M 2230/10 (2013.01); A61M 2230/201 (2013.01); A61M 2230/202 (2013.01); A61M 2230/205 (2013.01); A61M 2230/432 (2013.01); A61M 2230/435 (2013.01); B01F 2035/99 (2022.01); B01F 2101/55 (2022.01)] 14 Claims
OG exemplary drawing
 
1. A gas humidifier comprising:
a gases inlet;
a gases outlet;
a gases flow channel extending from the gases inlet to the gases outlet and configured to receive a gases flow;
a reservoir configured to hold a volume of water;
a water delivery pathway extending from the reservoir to the gases flow channel, wherein the water delivery pathway is configured to allow the water to be drawn from the reservoir to the gases flow channel;
a heater positioned downstream of the water delivery pathway, the heater configured to provide a heat output to the water drawn into the gases flow channel through the water delivery pathway to humidify the gases flow flowing through the gases flow channel from the gases inlet to the gases outlet;
at least one upstream sensor located within the gases flow channel and upstream of the water delivery pathway, the at least one upstream sensor configured to provide an upstream signal based on one or more upstream characteristics of the gases flow;
at least one downstream sensor located within the gases flow channel and downstream of the water delivery pathway, the at least one downstream sensor configured to provide a downstream signal based on one or more downstream characteristics of the gases flow; and
a controller configured to receive the upstream signal and/or the downstream signal to control the heat output of the heater based on the upstream signal and/or the downstream signal.