US 11,911,563 B2
Moisture permeable conduit for a breathing circuit
Diane Gibson, Clydebank (GB); and Jeno Kurja, Paal-Beringen (BE)
Assigned to Plastiflex Group, Paal-Beringen (BE)
Appl. No. 17/287,582
Filed by Plastiflex Group, Paal-Beringen (BE)
PCT Filed Nov. 6, 2019, PCT No. PCT/EP2019/080441
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2020/094741, PCT Pub. Date May 14, 2020.
Claims priority of application No. 18205267 (EP), filed on Nov. 8, 2018.
Prior Publication US 2021/0316102 A1, Oct. 14, 2021
Int. Cl. A61M 16/08 (2006.01); B29C 53/58 (2006.01); B29C 53/78 (2006.01); B29C 53/80 (2006.01); B29C 53/84 (2006.01)
CPC A61M 16/08 (2013.01) [B29C 53/581 (2013.01); B29C 53/585 (2013.01); B29C 53/785 (2013.01); B29C 53/8083 (2013.01); B29C 53/845 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A limb for a breathing circuit comprising:
at least one flexible, helically wound conduit for a breathing circuit comprising:
an inlet,
an outlet, and
a tubular structure defining a flow passage between said inlet and said outlet,
wherein said tubular structure consists of a first helical web and a first helically wound rib,
wherein the first helically wound rib is heat-bonded to adjacent turns of said first helical web,
wherein said first helical web has a web thickness of less than 0.5 mm, and
wherein at least a region of said first helical web is made of a predetermined first polymer material or blend, such that the first helical web is permeable to water vapor and one or more of O2 and CO2, and
wherein the axial tensile strength of the tubular structure by itself is greater than 40N;
a first connector mounted at the first end of the at least one conduit; and
a second connector mounted at the second end of the at least one conduit,
wherein the first connector is provided for connecting to a first device of the breathing circuit and the second connector is provided for connecting to a second device of the breathing circuit.