Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Reexamination Certificate
2005-02-05
2011-12-06
Kramer, Devon C (Department: 3746)
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
Reexamination Certificate
active
08070457
ABSTRACT:
A method is provided for determining faults during the operation of a pump unit. At least two electric variables that determine the electric output of the motor and at least one fluctuating hydraulic variable of the pump are detected. The detected values or values formed from these variables by algorithms are automatically compared to predefined stored values using electronic data processing and the results of this comparison are used to determine whether or not faults have occurred.
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Grundfos a/s
Kramer Devon C
Lettman Bryan
McGlew and Tuttle , P.C.
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