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US 6,123,523 AGranted
Gas-dispersion device
OwnerPaul V. Cooperinventor
Life of this patent
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OwnerPaul V. Cooperinventor
Estimating the term…
A device for dispersing gas into molten metal, the device comprising: (1) a pump having: (a) a pump base including a pump chamber and a discharge, (b) a motor, (c) a motor shaft connected to the motor, (d) a rotor shaft connected to the motor shaft by a coupling and (e) a rotor fastened to the end of the rotor shaft opposite the motor shaft, the rotor shaft positioned in the pump chamber. The motor shaft and rotor shaft each have gas-transfer passages and the rotor preferably includes openings to transfer gas from the rotor-shaft passage into the pump chamber. The pump generates a stream of molten metal traveling through the discharge. Gas is introduced into the motor shaft passage and passes into the rotor shaft passage where it is transferred to the rotor and ultimately escapes through the openings in the rotor and into the pump chamber. As the rotor turns it mixes the gas and the molten metal and this mixture travels through the entire length of the pump discharge. Optionally, a metal-transfer conduit may extend from the discharge.
A pump for pumping molten metal, said pump comprising:
A rotor shaft for use in a molten metal pump having a pump chamber, the rotor shaft having a first end including a threaded opening connectable to a coupling, a second end connectable to a rotor positioned within the pump chamber, and a gas-transfer passage therein.
A method for dispersing gas into molten metal, said method including the steps of:
A method for dispersing gas into molten metal, said method including the steps of:
Dependencies are inferred from the claim text.