US 12,478,753 B2
Vent for a component of a respiratory therapy system
Hamish Joshua Rose, Auckland (NZ); and Max Leon Betteridge, Auckland (NZ)
Assigned to Fisher & Paykel Healthcare Limited, Auckland (NZ)
Appl. No. 16/312,503
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
PCT Filed Jul. 7, 2017, PCT No. PCT/NZ2017/050093
§ 371(c)(1), (2) Date Dec. 21, 2018,
PCT Pub. No. WO2018/009080, PCT Pub. Date Jan. 11, 2018.
Claims priority of provisional application 62/359,919, filed on Jul. 8, 2016.
Prior Publication US 2019/0160249 A1, May 30, 2019
Int. Cl. A61M 16/06 (2006.01); A61M 16/08 (2006.01)
CPC A61M 16/0683 (2013.01) [A61M 16/06 (2013.01); A61M 16/0633 (2014.02); A61M 16/0825 (2014.02); A61M 2202/0225 (2013.01); A61M 2205/42 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A respiratory therapy system comprising a vent, the vent comprising:
a substrate having an inner surface and an outer surface;
a longitudinal axis extending through the inner surface and the outer surface at a center of the vent; and
a plurality of vent holes extending through the substrate, each of the plurality of vent holes having a vent hole circumference, each of the plurality of vent holes comprising:
an exhaust gas inlet at the inner surface of the substrate and an exhaust gas outlet at the outer surface of the substrate,
the exhaust gas inlet and the exhaust gas outlet each having a notional center point,
a vent hole draft direction axis passing through the notional center point of the exhaust gas inlet and the notional center point of the exhaust gas outlet, thereby defining a draft direction of each vent hole,
a sidewall extending between the exhaust gas inlet and the exhaust gas outlet, an angle between the sidewall and the inner surface of the substrate is less than 90 degrees around the vent hole circumference, the angle between the sidewall and the inner surface of the substrate varying between the inner surface and the outer surface; and
a draw direction axis passing through the exhaust gas outlet and the notional center point of the exhaust gas inlet, the draw direction axis forming an angle with the sidewall between 0 and 25 degrees, thereby defining a draw direction of each vent hole;
wherein the exhaust gas inlet has a smaller diameter than the exhaust gas outlet such that the sidewall is inclined;
wherein the vent hole draft direction axes of vent holes further from a center of the vent are inclined at a greater angle from the longitudinal axis relative to the vent hole draft direction axes of vent holes closer to the center of the vent, the vent hole draft direction axis of each vent hole being non-parallel to every other vent hole draft direction axis of the plurality of vent holes; and
wherein the draw direction axes of the plurality of vent holes are parallel with each other.