Molten metal pump with vaned impeller

  • US 5,470,201 A
  • Filed: 09/26/1994
  • Issued: 11/28/1995
  • Est. Priority Date: 06/12/1992
  • Status: Expired due to Term
First Claim
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1. A molten metal pump comprising:

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

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

    (c) an impeller in communication with said second end of said shaft;

    (d) a volute housing said impeller, wherein said volute has a first opening through which molten metal can be drawn and a second opening through which molten metal can be discharged; and

    (e) said impeller comprising an imperforate substantially circular base having a surface facing toward a 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 circumferentially apart;

    each vane defining a first edge, a second edge and a third edge;

    said first edge being disposed on said base;

    said second edge defining an inlet end;

    said third edge being a radially outer edge;

    said second edge of adjacent vanes defining an inlet area over their entire radial dimension and being generally planar;

    said third edges of adjacent vanes defining an outlet area; and

    said outlet area being greater than said inlet area.

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