Stirrer for use in liquid storage tanks, and a method for determ

Details Stirrer for use in liquid storage tanks, and a method for determ Stirrer for use in liquid storage tanks, and a method for determ

1987-06-03

1988-11-22

Simone, Timothy F.

Agitating

Method

366297, 366330, B01F 706

Patent

active

047861860

ABSTRACT:
A device with vertical buoyancy tanks fitted to its upper part is provided with rotors which generate horizontal and vertical propulsion, and which stirs the liquid uniformly as it moves freely through a liquid storage tank, thereby preventing the accumulation of sludge. The vertical buoyancy tanks stabilize the stirrer and provide a restoring force if the stirrer is upset. The stirrer is fitted with an ultrasonic wave emitter, and ultrasonic receptors are installed at several positions in the liquid tank. An ultrasonic pulse is emitted after a certain interval when the stirrer is at rest on the bottom of the tank. The position of the stirrer is computed for each pulse emission, and the average is taken to give the actual position of the stirrer.

REFERENCES:
patent: 3873071 (1975-03-01), Tatebe
patent: 3946829 (1976-03-01), Mori et al.
patent: 3972614 (1976-08-01), Johansen et al.
patent: 4168916 (1979-09-01), Yamada et al.

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