Back pressure compensator for apparatus for controlling liquid l

Details Back pressure compensator for apparatus for controlling liquid l Back pressure compensator for apparatus for controlling liquid l

1982-08-18

1984-10-23

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 12, 417 38, 200183, F04B 4106

Patent

active

044785550

ABSTRACT:
A compensating device which includes a weighted lever adapted to be selectively disposed in restraining relation to a trip arm of an electrical switch controlling member responsive to head pressure in a reservoir main for cutting in or cutting out reservoir filling pumps, and operating for selectively delaying pump cut-out.

REFERENCES:
patent: 4207030 (1976-09-01), Pearson

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