	US 12,234,832 B2
	Impeller wheel of a centrifugal pump
Patrick Flueckiger, Neunkirch (CH); and Andreas Bruno Würms, Neunkirch (CH)
Assigned to Frideco AG, Neunkirch (CH)
Appl. No. 18/029,581
Filed by Frideco AG, Neunkirch (CH)
PCT Filed Sep. 30, 2021, PCT No. PCT/EP2021/077026 § 371(c)(1), (2) Date Mar. 30, 2023, PCT Pub. No. WO2022/069676, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 1256/20 (CH), filed on Oct. 2, 2020.
Prior Publication US 2023/0366411 A1, Nov. 16, 2023
Int. Cl. F04D 29/22 (2006.01); F04D 1/00 (2006.01)

CPC F04D 29/2216 (2013.01) [F04D 1/00 (2013.01)]

14 Claims

1. An impeller wheel having in at least one side view perpendicular to a rotary axis an outer contour that is spaced apart radially from the rotary axis, the outer contour comprising a first contour line which is inclined relative to the rotary axis by a first angle, and comprising a second contour line which directly follows the first contour line and is inclined relative to the rotary axis by a second angle, the second angle being by at least 0.05° and maximally 2° smaller than the first angle, wherein in the side view a first extension of the first contour line parallel to the rotary axis is at least 20% and maximally 50% of a second extension of the second contour line parallel to the rotary axis.