US 12,280,215 B2
Medical tubes and methods of manufacture
Elmo Benson Stoks, Auckland (NZ); and Charles Christopher North, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on Oct. 15, 2021, as Appl. No. 17/451,099.
Application 17/451,099 is a continuation of application No. 16/125,594, filed on Sep. 7, 2018, granted, now 11,318,270.
Application 16/125,594 is a continuation of application No. 14/123,485, granted, now 10,080,866, issued on Sep. 25, 2018, previously published as PCT/IB2012/001786, filed on May 30, 2012.
Claims priority of provisional application 61/610,109, filed on Mar. 13, 2012.
Claims priority of provisional application 61/492,970, filed on Jun. 3, 2011.
Prior Publication US 2022/0211966 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 39/00 (2006.01); A61M 5/44 (2006.01); A61M 13/00 (2006.01); A61M 16/08 (2006.01); A61M 16/10 (2006.01); A61M 25/00 (2006.01); B29C 53/60 (2006.01); B29C 53/78 (2006.01); A61M 16/16 (2006.01)
CPC A61M 16/1095 (2014.02) [A61M 13/00 (2013.01); A61M 16/0875 (2013.01); A61M 16/0883 (2014.02); A61M 25/005 (2013.01); A61M 39/00 (2013.01); B29C 53/60 (2013.01); B29C 53/785 (2013.01); A61M 5/44 (2013.01); A61M 16/0833 (2014.02); A61M 16/16 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/75 (2013.01); A61M 2207/00 (2013.01); Y10T 29/49826 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A composite tube for use in medical circuits that provide gases to and/or from a patient, the composite tube comprising:
a first elongate member and a second elongate member that provide for a lumen with a smooth lumen surface, the smooth lumen surface extending along a longitudinal axis of the composite tube;
the first elongate member comprising a hollow body, the first elongate member being spirally wound to form at least a portion of a wall that defines the smooth lumen surface through the composite tube and the hollow body at least partially surrounding the smooth lumen surface; and
the second elongate member being spirally wound and joined between adjacent turns of the first elongate member, the second elongate member forming at least a portion of the wall that defines the smooth lumen surface through the composite tube, the second elongate member having a longitudinal cross-section that is wider proximal the smooth lumen surface through the composite tube and narrower at a radial distance away from the smooth lumen surface through the composite tube, and the longitudinal cross-section being generally triangular, generally T-shaped, or generally Y-shaped.