Patent ID: 8251663

Claim:
An impeller for a pump unit, the impeller comprising two cover disks ( 2 , 4 ) spaced from one another in an axial direction (X) of the impeller, the cover disks being connected to one another via at least one connection element ( 8 ), and at least one blade ( 12 , 14 ) arranged between the two cover disks ( 2 , 4 ), the at least one blade extending from an inner diameter of the impeller to an outer diameter of the impeller, wherein the at least one blade ( 12 , 14 ) comprises a continuous gap ( 16 ) which extends from a first edge ( 22 , 24 ) of the at least one blade ( 12 , 14 ) situated at the inner diameter, to a second edge ( 26 , 28 ) of the at least one blade ( 12 , 14 ) situated at the outer diameter, the gap ( 16 ) dividing the at least one blade into two blade parts ( 12 , 14 ), each of the two blade parts being connected to only one of the two cover disks ( 2 , 4 ).