Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F04
POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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F04D
NON-POSITIVE-DISPLACEMENT PUMPS
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15/00
Control, e.g. regulation, of pumps, pumping installations or systems
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F04D15/02
Stopping of pumps, or operating valves, on occurrence of unwanted conditions
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F04D15/0209
responsive to a condition of the working fluid
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F04D15/0218
the condition being a liquid level or a lack of liquid supply
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F04D15/0227
Lack of liquid level being detected using a flow transducer
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