US 12,228,140 B2
Impeller receptacle
Udo Berling, Hopsten (DE)
Assigned to Caso Holding GmbH, Arnsberg (DE)
Appl. No. 17/781,598
Filed by CASO HOLDING GMBH, Arnsberg (DE)
PCT Filed Dec. 1, 2020, PCT No. PCT/EP2020/084141
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2021/110687, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 102019132607.9 (DE), filed on Dec. 2, 2019.
Prior Publication US 2023/0193918 A1, Jun. 22, 2023
Int. Cl. F04D 29/26 (2006.01); F04D 29/62 (2006.01); F16D 1/08 (2006.01); F16D 1/116 (2006.01); F24C 15/20 (2006.01)
CPC F04D 29/263 (2013.01) [F04D 29/626 (2013.01); F16D 1/08 (2013.01); F16D 1/116 (2013.01); F24C 15/20 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An impeller comprising:
a receiving recess having a receiving recess diameter, an inner wall of the receiving recess has at least one undercut, wherein the receiving recess is configured to receive an impeller mount comprising:
at least one rotationally symmetrical body, the at least one rotationally symmetrical body having a first end face, a second end face and a lateral surface, with at least one radial bore starting from the lateral surface radially into the at least one rotationally symmetrical body and a mounting recess extends from the first end face into the at least one radial bore, with a locking ball in the at least one radial bore with a ball diameter and a spring, the locking ball configured to be pressed radially outwards by a spring force of the spring to define a spherical circle having a diameter, the spherical circle forming a maximum circumference of the impeller mount, the at least one radial bore having at least a first, inner radial bore diameter and a second, outer radial bore diameter, wherein the second, outer radial bore diameter is smaller than the ball diameter,
wherein the inner wall of the receiving recess is larger than a diameter of the at least one rotationally symmetrical body of the impeller mount, the inner wall of the receiving recess including a fitting section and a constriction section, the inner wall of the fitting section having a second diameter and the inner wall of the constriction section having a third diameter, the second diameter of the inner wall of fitting section being approximately equal to the diameter of the spherical circle of the impeller mount, the third diameter of the inner wall of the constriction section increasing along a section from the constriction section towards the fitting section to define the at least one undercut;
wherein when the impeller mount is received within the fitting section of the receiving recess, the locking ball is pressed radially outward such that at least a portion of the locking ball is in contact with the inner wall of the receiving recess to produce a frictional connection between the impeller mount and the impeller.