Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1997-01-21
2000-05-09
Thorpe, Timothy S.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
417 441, 45412, F04B 4906
Patent
active
060595361
ABSTRACT:
An emergency shutdown system for a water-circulating pump monitors the vacuum on the influent side of a pump. The system includes a vacuum switch connected to the influent side of the pump by a vacuum line. The vacuum switch is connected to a pump shut-off switch which is, in turn, connected to the motor of the pump. When one of the influent lines leading to the pump becomes clogged or blocked, the vacuum switch, through the vacuum line, senses the increased suction and delivers an electrical shut-off signal. The pump shut-off switch opens in response to the electrical signal, thereby interrupting line power to the pump. Audible and visual alarms are also electrically connected to the vacuum switch. A main switch, including on, off, start and vacuum bypass positions, is included for manually activating and deactivating the pump motor and for enabling the pump to operate under selected high vacuum situations without deactivating the alarms. A siren key switch is also provided for turning off the audible alarms during pool maintenance. The components of the system are housed in a corrosion-resistant box having a deep base and a cover hinged and locked to the base.
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Gartenberg Ehud
Narasimhan Meera P.
O.I.A. LLC
Thorpe Timothy S.
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