Rotary kinetic fluid motors or pumps – Combined
Patent
1995-06-07
1997-10-14
Kwon, John T.
Rotary kinetic fluid motors or pumps
Combined
415200, 266235, 266239, F01D 1500
Patent
active
056765207
ABSTRACT:
In a pump for pumping molten metal including a motor and a shaft connected at an upper end to the motor and at a lower end to an impeller which is rotatable in a molten metal bath, the improvement being an apparatus for impeding oxidation of the shaft, including a gas source for releasing gas and a gas feed tube in fluid communication with the gas source, the gas feed tube being positioned to direct gas along the outer surface of the shaft.
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