US 12,331,749 B2
Regenerative blower
Donald Roy Kuriger, Auckland (NZ); and Johannes Nicolaas Bothma, Auckland (NZ)
Assigned to FISHER & PAYKEL HEALTHCARE LIMITED, Auckland (NZ)
Filed by Fisher & Paykel Healthcare Limited, Auckland (NZ)
Filed on May 11, 2022, as Appl. No. 17/742,036.
Application 17/742,036 is a continuation of application No. 16/761,222, granted, now 11,371,515, previously published as PCT/IB2018/058600, filed on Feb. 11, 2018.
Claims priority of provisional application 62/581,449, filed on Nov. 3, 2017.
Prior Publication US 2022/0282733 A1, Sep. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 23/00 (2006.01); A61M 16/00 (2006.01); F04D 5/00 (2006.01); F04D 25/06 (2006.01); F04D 29/18 (2006.01); F04D 29/42 (2006.01); F04D 29/66 (2006.01)
CPC F04D 23/008 (2013.01) [A61M 16/0066 (2013.01); F04D 5/002 (2013.01); F04D 25/0606 (2013.01); F04D 29/4213 (2013.01); F04D 29/4246 (2013.01); A61M 2205/42 (2013.01); F04D 29/188 (2013.01); F04D 29/666 (2013.01); F05B 2250/501 (2013.01); F05D 2250/53 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A regenerative blower comprising:
a housing comprising a first port and a second port;
an airflow channel extending between the first port and the second port, wherein the airflow channel extends along a plane;
an impeller rotatable in an impeller channel, wherein the impeller promotes airflow in the airflow channel from the first port to the second port;
a motor to drive the impeller;
an interrupter between the first port and the second port to limit airflow from the second port to the first port; and
wherein the first port comprises a conduit that extends from the airflow channel, the second port comprises a conduit that extends from the airflow channel, and the first port forms a spiral with the airflow channel,
wherein the first port is inclined with respect to the plane of the airflow channel, and
wherein the housing comprises a top housing and a bottom housing, the impeller is disposed between the top housing and the bottom housing, the motor is disposed at least partially in the bottom housing, and the top housing is open to the bottom housing, and the top housing is open to the bottom housing such that there is no plate or other barrier of the housing separating the impeller and the motor.