US 12,280,214 B2
Conduit with heating element
Daniel John Smith, Auckland (NZ); and David Peter Baldwin, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on Feb. 18, 2021, as Appl. No. 17/178,579.
Application 17/178,579 is a continuation of application No. 15/789,827, filed on Oct. 20, 2017, granted, now 10,953,184.
Application 15/789,827 is a continuation of application No. 13/272,047, filed on Oct. 12, 2011, granted, now 9,827,393.
Application 13/272,047 is a continuation of application No. 10/684,917, filed on Oct. 14, 2003, granted, now 8,037,882.
Prior Publication US 2021/0275770 A1, Sep. 9, 2021
Int. Cl. A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61M 16/10 (2006.01)
CPC A61M 16/1075 (2013.01) [A61M 16/08 (2013.01); A61M 16/0816 (2013.01); A61M 16/0833 (2014.02); A61M 16/0883 (2014.02); A61M 16/1045 (2013.01); A61M 16/1095 (2014.02)] 14 Claims
OG exemplary drawing
 
1. A conduit for a breathing circuit, the conduit comprising:
an enclosing wall having a first end and a second end, the enclosing wall comprising an extrusion comprising a breathable material that allows passage of water vapor through the enclosing wall without allowing passage of liquid water through the enclosing wall; and
a heater positioned within the conduit, the heater comprising at least one elongate heating element, the at least one elongate heating element being at least partially covered with an outer hydrophilic layer, the outer hydrophilic layer being constructed of a water-resistant material, and the outer hydrophilic layer attracting water into spaces and/or voids on an outer surface of the outer hydrophilic layer through capillary action, the heater being positioned freely within the conduit such that at least a part of the heater is configured to settle at a low point in the conduit.