US 12,320,364 B2
Pump for conveying wastewater and impeller for such a pump
Robert Connolly, Wexford (IE)
Assigned to Sulzer Management AG, Winterthur (CH)
Filed by Sulzer Management AG, Winterthur (CH)
Filed on Nov. 30, 2023, as Appl. No. 18/524,311.
Claims priority of application No. 22213132 (EP), filed on Dec. 13, 2022.
Prior Publication US 2024/0191723 A1, Jun. 13, 2024
Int. Cl. F04D 29/42 (2006.01); F04D 7/04 (2006.01); F04D 29/22 (2006.01); F04D 29/24 (2006.01)
CPC F04D 29/4293 (2013.01) [F04D 7/04 (2013.01); F04D 29/225 (2013.01); F04D 29/2255 (2013.01); F04D 29/245 (2013.01); F04D 29/2294 (2013.01); F04D 29/242 (2013.01); F05D 2240/30 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An impeller for a pump for conveying wastewater, comprising:
a shroud configured to be rotated about an axis of rotation defining an axial direction; and
a blade configured to convey the wastewater, the blade comprising a leading edge, a trailing edge, a pressure side, a suction side and an upper rim, the blade extending from the shroud in the axial direction to the upper rim, the blade extending in a circumferential direction from the leading edge to the trailing edge, the suction side being the radially inner surface of the blade and the pressure side being the radially outer surface of the blade, the blade comprising a closed passage extending inside the blade, and the passage having an inlet at the pressure side and an outlet at the suction side of the blade, the inlet of the passage having a cross-sectional area different from a cross-sectional area of the outlet of the passage.