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Molten metal pump with vaned impeller

DC
  • US 5,586,863 A
  • Filed: 06/06/1995
  • Issued: 12/24/1996
  • Est. Priority Date: 06/12/1992
  • Status: Expired due to Term
First Claim
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1. A molten metal pump comprising:

  • (a) an elongated shaft having first and second ends;

    (b) a means for rotating said shaft about an axis in communication with said first end of said shaft;

    (c) an impeller disposed adjacent said second end of said shaft;

    (d) a pumping chamber housing said impeller, said pumping chamber having a first generally axially directed inlet opening through which molten metal can be drawn and a second generally radially directed outlet opening through which molten metal can be discharged; and

    ,(e) said impeller comprising an imperforate substantially circular base having a surface facing toward the first end of the shaft, and at least two imperforate vanes connected to and extending substantially perpendicular from said surface and extending radially from said shaft or a hub securing said shaft toward a peripheral portion of said base, said vanes being spaced apart at terminal inlet ends along their entire radial dimension to create an inlet area comprised of the axial opening between adjacent vanes at the terminal ends and an outlet area comprised of the radial opening between adjacent vanes along the axial direction of the vanes, each vane having a leading edge with a distal portion adjacent said peripheral base portion forming an angle of less than about 100°

    relative to a tangent to said circular base, said tangent being drawn at the center of said vane.

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