US 10,376,666 B2
Breathing assistance apparatus
Alastair Edwin McAuley, Auckland (NZ); Craig Robert Prentice, Auckland (NZ); Rory Alexander Monro, Auckland (NZ); Isaac Tristram Tane Mason, Auckland (NZ); and Nadjean Maurice Gabriel Geslain, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on May 29, 2015, as Appl. No. 14/726,278.
Application 14/726,278 is a continuation of application No. 12/997,559, granted, now 9,072,855, previously published as PCT/NZ2009/000105, filed on Jun. 12, 2009.
Claims priority of provisional application 61/173,855, filed on Apr. 29, 2009.
Claims priority of provisional application 61/166,306, filed on Apr. 3, 2009.
Claims priority of provisional application 61/148,476, filed on Jan. 30, 2009.
Claims priority of provisional application 61/082,877, filed on Jul. 23, 2008.
Claims priority of provisional application 61/060,855, filed on Jun. 12, 2008.
Prior Publication US 2016/0256653 A1, Sep. 8, 2016
Int. Cl. A61M 16/06 (2006.01); A61M 16/00 (2006.01); A61M 16/08 (2006.01); A61M 16/16 (2006.01)
CPC A61M 16/0666 (2013.01) [A61M 16/0066 (2013.01); A61M 16/06 (2013.01); A61M 16/0616 (2014.02); A61M 16/0622 (2014.02); A61M 16/0683 (2013.01); A61M 16/0816 (2013.01); A61M 16/0875 (2013.01); A61M 16/16 (2013.01); A61M 16/0825 (2014.02); A61M 2210/0618 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A patient interface for supplying the flow of respiratory gases to a user comprising:
a gasket portion arranged to receive the flow of respiratory gases;
a pair of pillow portions connected to and extending from the gasket portion, the pillow portions arranged to receive the flow of respiratory gases from the gasket portion and provide the flow of respiratory gases to the user;
each pillow portion comprising a stalk and a cap section;
a base of the stalk connected to the gasket portion and the cap section connected to an upper end of the stalk;
the cap section comprising an inner cap and an outer cap that surrounds the inner cap, the inner cap and the outer cap being separated to define an air gap, the outer cap configured to substantially seal against a nare of the user;
at least one rib disposed on the cap section of the pillow portion, the at least one rib configured to provide rigidity to the cap section and to limit the collapse of the inner cap or the outer cap, in use, the at least one rib having a first end and a second end, and an upper surface and a lower surface extending between the first end and the second end, wherein the at least one rib extends from the first end at a first location to the second end at a second location, the first and second locations being located on the inner side of the outer cap, the first location being located diametrically across from the second location,
wherein the rib at least partially lies within the flow of respiratory gases delivered to the user with each of the upper surface and the lower surface located between an uppermost extent and a lowermost extent of the cap section.