Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1982-07-19
1987-08-04
Look, Edward K.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
200 83WM, 417 33, F04B 4900
Patent
active
046843272
ABSTRACT:
An apparatus for monitoring the level of water being pumped into kitchen sinks, laundry tubs, and standpipes. The apparatus features a novel fluid levels ending unit operatively connected to a novel control unit for providing maintained termination of electrical power to the pump motor, should the water drainage system become clogged. As water flows through the nozzle of the sending unit, it operates to seal off the nozzle's air chamber inlet to trap and contain air therein. Therefore, should the drainage system become clogged, back-up water rises to a predetermined height within the air chamber. In so doing, the trapped air within the air chamber becomes compressed to a predetermined small value, for actuating the pressure switch. The actuated pressure switch in turn provides an electrical signal to the control unit for termination of water pump action.
REFERENCES:
patent: 3091111 (1963-05-01), Cruse et al.
patent: 3862433 (1975-01-01), Rousselet
patent: 4069837 (1978-01-01), Jirasek
patent: 4203462 (1980-05-01), Beller
patent: 4380243 (1983-04-01), Braley
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