Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1998-05-14
2000-03-21
Tanner, Harry B.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
417 43, F04B 4902
Patent
active
060395435
ABSTRACT:
A new pump shut off system for shutting off a pump when there is insufficient fluid to pump through the pump. The inventive device includes a pump with a primary switch for selectively activating and deactivating the pump. A processor is electrically connected to the primary switch. The processor has a timer for measuring a predetermined amount of time. The processor deactivates the pump after the timer measures the predetermined amount of time. The processor also has a flow switch with a flow sensor in an outlet conduit of the pump. The flow switch deactivates the timer to prevent the timer from measuring the predetermined amount of time when the flow switch is activated by the flow sensor when the flow sensor detects fluid flow through the outlet conduit above the predetermined amount during the predetermined amount of time.
REFERENCES:
patent: 3963375 (1976-06-01), Custis
patent: 4329120 (1982-05-01), Walters
patent: 4507053 (1985-03-01), Frizzell
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