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Overflow vortex transfer system

  • US 9,506,346 B2
  • Filed: 06/15/2010
  • Issued: 11/29/2016
  • Est. Priority Date: 06/16/2009
  • Status: Active Grant
First Claim
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1. A molten metal pump comprising an elongated tube having a base end, a top end and a longitudinal axis, said tube defining a pumping chamber, a shaft disposed within said tube and a centrifugal impeller rotatable by said shaft, said impeller including a bearing ring portion, said impeller disposed in said pumping chamber proximate said base end, the bearing ring portion of said impeller forming a bearing surface with said tube, said pumping chamber adjacent said impeller having a diameter at least 1.1 times a diameter of the impeller, said base end including an inlet and said top end including an outlet, a distance between said inlet and said outlet being at least three times a height of said impeller and less than 14 feet, and wherein said top end includes a chamber directing a flow of molten metal radially to said outlet.

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