Patent ID: 9261095
Filing Date: 2016-02-16
CPC Classification: F04D

Claim Text:
1. A cutter pump device for a pump, comprising: an impeller concentrically located in a volute of the centrifugal pump, the volute defining a chamber and having a front wall with a front annular flange defining an inlet port, the impeller having a rotational axis about which the impeller rotates within the volute, the impeller including a plurality of impeller vanes, each impeller vane having an inlet angle, the impeller having an inlet end that extends into and sits concentrically within the front annular flange; a wear ring adjacent the impeller between the impeller and the volute; a rotor releasably attached to the impeller, the rotor being a cutter auger radially concentric within the impeller in the volute and including a central section and a plurality of auger vanes, each auger vane extending spirally away from the central section, the auger vanes numbered to match the number of impeller vanes and structured with a hydraulic profile that matches the inlet angles of the impeller vanes; and a stationary cutter plate releasably attached to the volute, concentric with and adjacent to the cutter auger, the stationary cutter plate including a plate ring and a first set of teeth having at least one tooth extending inwards from the plate ring towards the rotational axis of the impeller, the first set of teeth being in shearing communication with the auger vanes to shear apart solids in the inlet port of the volute.