Patent ID: 8267645

Claim:
A centrifugal pump assembly comprising: a motor assembly; a pump housing connected to the motor assembly; a first diffuser and a second diffuser located within the pump housing; a first impeller axially centered within the first diffuser, the first impeller having a first hub segment and first plurality of vanes attached to the first hub segment; a second impeller axially centered within the second diffuser, the second impeller having a second hub segment and second plurality of vanes attached to the second hub segment, the second impeller being located further from the motor assembly than the first impeller; wherein each of the first hub segment and the second hub segment has a drive member and a driven member, the drive member of the first hub segment being operably and detachably connected to the driven member of the second hub segment, such that when the first hub segment rotates about an axis, it causes the second hub segment to rotate about the same axis; and a shaft extending from the motor assembly, into the pump housing, coupling to and terminating at the driven member of the first hub segment.