US 12,146,508 B2
Axial pump and riser
Paul V. Cooper, Chesterland, OH (US)
Assigned to Molten Metal Equipment Innovations, LLC, Middlefield, OH (US)
Filed by Molten Metal Equipment Innovations, LLC, Middlefield, OH (US)
Filed on May 26, 2022, as Appl. No. 17/826,111.
Prior Publication US 2023/0383753 A1, Nov. 30, 2023
Int. Cl. F04D 7/00 (2006.01); B22D 37/00 (2006.01); F04D 3/00 (2006.01); F04D 7/06 (2006.01); F04D 13/06 (2006.01)
CPC F04D 7/00 (2013.01) [B22D 37/00 (2013.01); F04D 3/00 (2013.01); F04D 7/065 (2013.01); F04D 13/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A device for pumping molten metal, the device comprising:
(a) a pump configured for pumping molten metal, wherein the pump comprises (i) a motor, (ii) a shaft having a first end connected to the motor, and a second end connected to a rotor, wherein the rotor is configured to push molten metal upwards; and
(b) a riser having an outer surface, a front, a bottom, an inlet, an outlet above the inlet, and a two-stage conduit having an upper stage comprising a first cross-sectional area and a lower stage beneath the upper stage, wherein the lower stage has a second cross-sectional area that is greater than the first cross-sectional area, wherein the upper stage has a cross-section comprising a circular center and a plurality of lobes extending from and connected to the circular center.