Method and apparatus for controlling the flow of a liquid, and v

Details Method and apparatus for controlling the flow of a liquid, and v Method and apparatus for controlling the flow of a liquid, and v

1995-05-02

1998-01-06

Hepperle, Stephen M.

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

73 5429, 73 5431, 1374875, G05D 706

Patent

active

057043825

ABSTRACT:
Method and apparatus for controlling the flow of a liquid from a supply pipe to a receiving device, to assure that only a preselected liquid is permitted to flow to the receiving device, by: feeding a sample quantity of the liquid from the supply pipe to a sampling receptacle while a main valve between the supply pipe and receiving device is closed; testing the liquid within the sampling receptacle by immersing a stirring device therein, rotating the stirring device by an electrical motor, measuring the load current of the electrical motor, and comparing the measured load current with a reference load current for the preselected liquid; and opening the main valve to permit the flow of the liquid from the supply pipe to the receiving device when the test results show a match of the measured load current with the reference value for the preselected liquid.

REFERENCES:
patent: 2280947 (1942-04-01), Gulliksen
patent: 3079787 (1963-03-01), Van Luik
patent: 3249115 (1966-05-01), Young
patent: 4535621 (1985-08-01), Gervais et al.

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