US 12,135,038 B1
Centrifugal pumps and casings therefore
Wayne Hable, Chippewa Falls, WI (US); Shane Sullivan, Chippewa Falls, WI (US); Paul Schaus, Chippewa Falls, WI (US); and Sheldon Susa, Chippewa Falls, WI (US)
Assigned to W.S. Darley & Co., Itasca, IL (US)
Filed by W.S. Darley & Co., Itasca, IL (US)
Filed on Jul. 19, 2022, as Appl. No. 17/868,426.
Int. Cl. F04D 29/42 (2006.01); F04D 1/00 (2006.01); F04D 29/44 (2006.01)
CPC F04D 29/4293 (2013.01) [F04D 1/00 (2013.01); F04D 29/445 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A single piece pump casing for use with a centrifugal pump to provide low noise characteristics, the casing comprising:
a first cut-water fluid flow path defined at least in part by a first cut-water wall, a second cut-water fluid flow path defined at least in part by a second cut-water wall, a first joint-water path and a second joint-water path, the first cut-water fluid flow path and the second cut-water fluid flow path communicating with the first joint-water path and the second joint-water path, the first joint-water path communicating with a first discharge nozzle and the second joint-water path communicating with a second discharge nozzle, the second cut-water wall having a total span of less than 180 degrees from a leading edge of the second cut-water wall to a trailing edge of the second cut-water wall as measured from a center point of a center opening of the casing and providing the low noise characteristics, the center opening configured to receive a drive shaft.