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Tube pump for transferring molten metal while preventing overflow

  • US 9,057,376 B2
  • Filed: 06/13/2013
  • Issued: 06/16/2015
  • Est. Priority Date: 06/13/2013
  • Status: Active Grant
First Claim
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1. A tube pump for transferring molten metal comprising:

  • a refractory tube having upper and lower end portions;

    a motor disposed near the upper end portion of said refractory tube;

    a refractory shaft extending in said refractory tube and connected to said motor near the upper end portion of said refractory tube;

    a refractory impeller connected to said refractory shaft in the lower end portion of said refractory tube;

    an upper outlet extending from the upper end portion of said refractory tube through which molten metal flows upon rotation of the impeller;

    wherein said refractory tube is enclosed at the upper end portion thereof; and

    a gas source connected at or near the upper end portion of said refractory tube that flows gas into said refractory tube under a pressure which prevents overflow of the molten metal above said outlet.

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