Patent ID: 8221070
Filing Date: 2012-07-17
Classification: F04D

Abstract:
1. An impeller for a centrifugal pump comprising: a disk-shaped shroud having a central axis, a front surface, a rear surface, and a circular perimeter; a hub at the center of the shroud, the hub having an axial bore; a first plurality of vanes on the front surface of the shroud, the first plurality of vanes extending radially inward from the perimeter towards the hub; a second plurality of vanes on the rear surface of the shroud, the second plurality of vanes extending radially inward from the perimeter towards the hub a balancing area on the rear surface of the shroud, the balancing area extending radially outward from the hub; and a plurality of openings in the shroud, the plurality of openings configured to allow a fluid to pass from one side of the shroud to the other.