Patent ID: 6187096
Filing Date: 2001-02-13
Classification: B05B,F04D

Abstract:
In a pump for pumping molten metal including a motor fastened to a motor support, a base having an impeller chamber, at least one molten metal inlet opening to the base, a molten metal outlet opening from the base, a shaft connected to the motor at one end, and an impeller connected to the other end of the shaft and rotatable in the impeller chamber, the base, the shaft and the impeller being formed of refractory material, the improvement comprising: a conduit in communication with molten metal discharged from the base outlet opening, said conduit being formed of refractory material and comprising an arcuate shaped portion having an inner wall and an outer wall, a plurality of molten metal outlet openings being disposed in the inner wall such that molten metal discharged through the openings projects toward an interior region formed by the arcuate portion to coat the perimeter surfaces of an object passed through the interior region; and an insulating region located between said conduit and said motor support effective to enable said conduit to be free from contact with heat conducting material which would lead to heat transfer and clogging of the openings.