Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1981-06-01
1983-08-30
Look, Edward K.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
417 28, 417 63, F04B 4900
Patent
active
044014120
ABSTRACT:
For use in connection with an electrically driven pump and check valve combination as used in municipal water and sewage plants wherein the check valve prevents the reverse flow of water from the pipeline to which the pump supplies water into the pump, as would otherwise happen in case of a pump failure or breakdown or temporary power failure, there is provided a pump director with a first timer that starts the pump operating as soon as a control switch is closed and power is available and, as soon as the pump motor is energized, a blue signal light flashes, but if pressure does not begin to build up in the pump outlet with the check valve closed, a flashing red signal will replace the blue and continue indefinitely until manually reset. If the pump does start to build up pressure, the flashing blue light will become steady whereupon a buildup of pressure continues and a flashing green light replaces the steady blue; and a second timer takes over under control also of a pressure switch to start opening the check valve and a limit switch is opened that cuts both timers out of the circuit and switches the flashing green light to a steady green light. In the event of an emergency, such as an unscheduled power failure, a damaged pump or motor, etc., a pressure switch losing pressure will trigger a fast emergency closing of the check valve and open the motor circuit.
REFERENCES:
patent: 2646205 (1953-07-01), Rosenschold
patent: 4083657 (1978-04-01), Misener
patent: 4273513 (1981-06-01), Salina
patent: 4290735 (1981-09-01), Sulko
Lescovich Joseph E.
Salina Louis E.
GA Industries Inc.
Look Edward K.
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