Bilge pump

Details Bilge pump Bilge pump

1985-04-24

1987-02-24

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

417 44, F04B 4904

Patent

active

046454268

ABSTRACT:
A pump operable in response to the level of the liquid to be pumped comprising an impeller, a motor for rotating the impeller, a discharge passage for receiving the liquid pumped by the impeller, and a sensing chamber communicating with the discharge passage between the impeller and the pump outlet so that liquid in the discharge passage can trap gas in the sensing chamber. A pump controller is responsive to the pressure of the trapped gas in the sensing chamber for energizing and di-energizing the motor. Energizing of the motor to cause the impeller to pump liquid into the discharge passage substantially increases the pressure of the trapped gas to thereby assure that the pump remains on.

REFERENCES:
patent: 2488506 (1949-11-01), Bernhardt
patent: 2765743 (1956-10-01), Hollinshead
patent: 2804516 (1957-08-01), Staak
patent: 3043225 (1962-07-01), Nielsen
patent: 3318249 (1967-05-01), Loeser
patent: 3717421 (1973-02-01), Schaefer

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