US 12,263,307 B2
Medical tubes and methods of manufacture
Peter Kenneth Graham, Auckland (NZ); Enrico Alvarez Garcia, Auckland (NZ); and David John Sims, Auckland (NZ)
Assigned to FISHER & PAYKEL HEALTHCARE LIMITED, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on Sep. 22, 2020, as Appl. No. 17/028,443.
Application 17/028,443 is a continuation of application No. 14/351,344, granted, now 10,828,455, previously published as PCT/NZ2012/000184, filed on Oct. 12, 2012.
Claims priority of provisional application 61/547,482, filed on Oct. 14, 2011.
Prior Publication US 2021/0069447 A1, Mar. 11, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 16/08 (2006.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/10 (2006.01); A61M 16/16 (2006.01); A61M 39/08 (2006.01); B29C 48/09 (2019.01); B29C 48/13 (2019.01); A61M 13/00 (2006.01); B29C 48/00 (2019.01); B29C 48/151 (2019.01); B29C 48/30 (2019.01); B29L 23/00 (2006.01); B29L 31/00 (2006.01)
CPC A61M 16/0875 (2013.01) [A61M 16/0003 (2014.02); A61M 16/021 (2017.08); A61M 16/06 (2013.01); A61M 16/109 (2014.02); A61M 16/1095 (2014.02); A61M 16/16 (2013.01); A61M 39/08 (2013.01); B29C 48/09 (2019.02); B29C 48/13 (2019.02); A61M 13/003 (2013.01); A61M 16/0841 (2014.02); A61M 16/1075 (2013.01); A61M 2205/0238 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3633 (2013.01); A61M 2205/75 (2013.01); A61M 2207/00 (2013.01); A61M 2207/10 (2013.01); A61M 2209/02 (2013.01); B29C 48/0016 (2019.02); B29C 48/151 (2019.02); B29C 48/30 (2019.02); B29C 48/303 (2019.02); B29L 2023/007 (2013.01); B29L 2031/7542 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A medical tube for providing humidified gas to a patient, the medical tube comprising:
a first connector;
a second connector,
an elongate conduit extending between the first connector and the second connector, the elongate conduit having:
a first end connected to the first connector,
a second end connected to the second connector,
a first opening at the first end, the first opening configured in size and shape to connect to a source of humidified gas such that the first opening receives humidified gases from the source of humidified gas,
a second opening at the second end, the second opening configured in size and shape to connect to a patient interface such that the second opening expels humidified gases to the patient through the patient interface,
a longitudinal axis,
a lumen extending along the longitudinal axis between the first opening and the second opening, and
an extruded wall extending between the first opening and the second opening and surrounding the lumen,
wherein the extruded wall comprises a first region surrounding the first opening, and a second region surrounding the second opening, the extruded wall being stiffer in the first region than in the second region based on a difference in thickness, mass, volume, or flex modulus of the extruded wall in the first region and in the second region.