US 12,168,986 B2
Self-priming assembly for use in a multi-stage pump
Bradley Wiyninger, Delano, MN (US); Daniel Allan Beilke, Blaine, MN (US); Jeff Hermes, Shoreview, MN (US); and Eli McElwain, Andover, MN (US)
Assigned to Pentair Flow Technologies, LLC, Delavan, WI (US)
Filed by Pentair Flow Technologies, LLC, Delavan, WI (US)
Filed on Jan. 24, 2023, as Appl. No. 18/159,003.
Application 18/159,003 is a continuation of application No. 16/773,110, filed on Jan. 27, 2020, granted, now 11,560,902.
Claims priority of provisional application 62/796,743, filed on Jan. 25, 2019.
Prior Publication US 2023/0160397 A1, May 25, 2023
Int. Cl. F04D 29/44 (2006.01); F04D 1/06 (2006.01); F04D 9/02 (2006.01); F04D 29/22 (2006.01)
CPC F04D 29/445 (2013.01) [F04D 1/06 (2013.01); F04D 9/02 (2013.01); F04D 29/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A self-priming assembly for a multi-stage pump, the self-priming assembly comprising:
a first diffuser with a first central portion, a first diffuser axis, a first arcuate channel within the first central portion, a first arcuate passage extending through the first central portion, and a first peripheral portion having a first ledge;
a second diffuser with a second central portion, a second diffuser axis, a second arcuate channel within the second central portion, a second arcuate passage extending through the second central portion, and a second peripheral portion having a second ledge, wherein the first ledge abuts the second ledge; and
an impeller with an impeller axis;
wherein the first diffuser and the second diffuser are configured to be combined and to receive the impeller therebetween with the first diffuser axis, the second diffuser axis, and the impeller axis aligned.