Patent ID: 9243641
Filing Date: 2016-01-26
CPC Classification: F04D

Claim Text:
1. A pump for pumping molten metal comprising: a pump shaft having an upper end and a lower end; a motor connected to the upper end of the shaft; an impeller fastened to the lower end of the shaft; support structure supporting the motor above the molten metal; a base disposed below the support structure including an impeller chamber in which the impeller is rotated by activation of the motor, wherein said base includes at least one inlet opening leading to the impeller chamber and at least one outlet passageway leading from the impeller chamber; at least one support post extending between said support structure and said base enabling the base to be submerged in the molten metal beneath said support structure; and a device that enables said post to resist deterioration from at least one of oxidation and abrasion while the post is disposed in the molten metal.