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Monolithic rotor and rigid coupling

  • US 6,398,525 B1
  • Filed: 06/08/2000
  • Issued: 06/04/2002
  • Est. Priority Date: 08/11/1998
  • Status: Expired due to Term
First Claim
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1. A device for pumping or otherwise conveying molten metal, the device comprising:

  • a) a motor;

    b) a motor shaft extending from the motor having a first end and a second end;

    c) a coupling having a first coupling member and a second coupling member, the first coupling member connected to the second end of the motor shaft;

    d) a rotor shaft having a first end and a second end, the first end connected to the second coupling member;

    e) a pump casing having an inlet, a pump chamber in fluid communication with the inlet and a discharge in fluid communication with the pump chamber;

    f) a first bearing surface formed in the pump casing; and

    g) a monolithic graphite rotor attached to the second end of the rotor shaft and positioned within the pump chamber, the monolithic graphite rotor having a second bearing surface that aligns with the first bearing surface, the second bearing surface not including any separate bearing members.

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