CPC F04D 7/065 (2013.01) [F04D 29/18 (2013.01); F04D 29/708 (2013.01)] | 16 Claims |
2. A molten metal pump comprising a body defining an elongated chamber, said elongated chamber configured to receive a shaft and impeller assembly, said body comprised of a refractory, ceramic or graphite material, said elongated chamber including an open top through which said shaft passes and a bottom opening interfacing with a base defining a pumping chamber, the impeller disposed in said pumping chamber, said pumping chamber including a bearing interfacing with the impeller, said base including a passage in an upper surface, said passage being in fluid communication with the elongated chamber and the pumping chamber, said base having a circumference and said body having a circumference, wherein the base circumference is only slightly larger, or the same or smaller than the circumference of the body, and wherein a circumference of a top opening of the passage is less than 20% of the circumference of the pumping chamber.
|