Oil detection apparatus for submersible pumps

Details Oil detection apparatus for submersible pumps Oil detection apparatus for submersible pumps

1986-03-14

1987-12-29

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

417 36, F04B 4900

Patent

active

047157852

ABSTRACT:
A probe is mounted on a water submersible pump housed within a transformer vault. The probe will extend into any water which accumulates in the bottom of the transformer vault enabling a conductive path to be established through an appropriate electric circuit to the pump motor to permit operation of the pump so that the water which is on the bottom of the vault can be safely pumped from the vault. As the water level falls as it is pumped, oily fluids, which are immiscible in the water and will normally rise to a level above the water level in the vault, will come in contact with the probe to form an electrical insulator to inactivate the circuit to disconnect a power source from the pump motor.

REFERENCES:
patent: 1505791 (1924-08-01), Lenz et al.
patent: 2463703 (1949-03-01), Legler
patent: 2468791 (1949-05-01), Thomson
patent: 3131335 (1964-04-01), Berglund et al.
patent: 3181557 (1965-05-01), Lannan, Jr.
patent: 3671142 (1972-06-01), Calabrese
patent: 4019067 (1977-04-01), Gladstone
patent: 4466777 (1984-08-01), Kimberlin
patent: 4586033 (1986-04-01), Andrejasich
patent: 4595341 (1986-06-01), Castell-Evans
patent: 4629398 (1986-12-01), Cahalan

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