Submerged pump control

Details Submerged pump control Submerged pump control

1977-08-12

1979-10-16

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

With plural separate drive motor controlling elements

733225, 417 40, F04B 4904

Patent

active

041711866

ABSTRACT:
A solenoid actuated mechanical relay is encapsulated in electrical insulating resin in a housing on a tubular column extending upward from a submerged pump unit in the bottom of a tank, to energize the pump motor. Float switches mounted on said housing are connected to the relay to control the pump in accordance with a liquid level in the tank.

REFERENCES:
patent: 2488506 (1949-11-01), Bernhardt
patent: 2588667 (1952-03-01), Stutzman
patent: 2600659 (1952-06-01), Koch, Jr.
patent: 2620412 (1952-12-01), Ford
patent: 2687693 (1954-08-01), Hudson
patent: 2697196 (1954-12-01), Harper
patent: 2748220 (1956-05-01), Lung
patent: 2918016 (1959-12-01), Olson
patent: 3520638 (1970-07-01), McUmber et al.
patent: 3545272 (1970-12-01), McGill

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