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US 5,634,770 AGranted
Molten metal pump with vaned impeller
AssigneeMetaullics Systems Co., L.P.
InventorsRonald E. Gilbert, David M. Masarin, George S. Mordue
Life of this patent
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Abstract
An elongated shaft suited to a molten metal environment which forms a connection between a rotor and an impeller. The shaft being formed with at least one end, in cross-section, having a plurality of rounded side portions with a relatively large radius and rounded corners having a relatively small radius connecting the side portions.
Claims10
A molten metal pump comprising:
- a shaft having first and second ends, at least one end being multi-sided in cross-section and including a plurality of rounded side portions having a relatively large radius and rounded corners connecting the side portions, the corners having a relatively small radius;
- a means for rotating said shaft in communication with said first end of said shaft;
- an impeller in communication with said second end of said shaft;
- and,
- 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.
2 more elements
An impeller shaft assembly, comprising:
- an elongate shaft having first and second ends, the first end adapted to be connected to a coupling which in turn is adapted to be connected to a drive motor and the second end adapted to be connected to an impeller;
- and,
- the first end of the shaft being multi-sided in cross-section and including a plurality of rounded side portions having a relatively large radius and rounded corners connecting the side portions, the corners having a relatively small radius.
Dependencies are inferred from the claim text.