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Dual volute molten metal pump and selective outlet discriminating means

  • US 4,786,230 A
  • Filed: 11/22/1985
  • Issued: 11/22/1988
  • Est. Priority Date: 03/28/1984
  • Status: Expired due to Term
First Claim
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1. A submersible molten metal pump continuously operable at temperatures in excess of 750°

  • C. comprising a supporting planar base and top, a top horizontal plate substantially separately supported above, spaced apart from but parallel with planar base top;

    said space defining a separated upper level filter means;

    a corresponding planar plate bottom of said supporting base having a plurality of downwardly depending volume restricting spacer legs integral therewith, said spacer legs upon submersion of said pump interiorly of a melting/holding furnace thereby creating a separated lower liquid metal filter ingress means through said intake volume means;

    interiorly of said supporting base a vertically separated pair of back-to-back volute impeller pumps operably and centrally affixed to a common vertical driven air-cooled shaft extending upwardly of and supported from within the interior of said base to a rigidly mounted air exposed shaft driving means, both of said upper and lower filter ingress intake volumes terminating in oppositely disposed, axially centered cup-like impeller receptacles integral with their respective volute impellers and rotatably interior of upper and lower fixed volute members creating thereby a common molten egress port downstream of said volute pumps discharging into a fluidics diverter valve integral and downstream of said dual volute pumps.

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