Device for switching a submersible motor-driven pump on and off

Details Device for switching a submersible motor-driven pump on and off Device for switching a submersible motor-driven pump on and off

1993-09-20

1995-11-14

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

73753, F04B 4900

Patent

active

054661277

ABSTRACT:
A device is provided for switching a submersible motor-driven pump on and off by a pressure sensor which measures the level of the liquid in the chamber enclosing the submersible motor-driven pump by the liquid pressure in the chamber, the pressure sensor being attached in or on the outside of the motor or pump casing and having a pressure-sensitive ohmic resistance.

REFERENCES:
patent: 3292057 (1966-12-01), Touchy
patent: 3318249 (1967-05-01), Loeser
patent: 3329023 (1967-07-01), Kurtz et al.
patent: 3753196 (1973-08-01), Kurtz et al.
patent: 3975115 (1976-08-01), Fisher et al.
patent: 3992130 (1976-11-01), Childress
patent: 4141025 (1979-02-01), Bronshtein et al.
patent: 4484862 (1984-11-01), Jensen
patent: 4587840 (1986-05-01), Dobler et al.
patent: 4901070 (1990-02-01), Vandevier
patent: 4992030 (1991-02-01), Hasslen, III

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