Pumps – Condition responsive control of pump drive motor – Responsive to pump or pump fluid temperature
Reexamination Certificate
2005-06-21
2005-06-21
Tyler, Cheryl (Department: 3746)
Pumps
Condition responsive control of pump drive motor
Responsive to pump or pump fluid temperature
C417S012000, C417S018000, C417S044200, C417S053000
Reexamination Certificate
active
06908289
ABSTRACT:
A pressure sensor subsystem measures the pressure within a fuel pump and outputs an under-pressure signal when the measured pressure is below a predetermined threshold pressure value. A temperature sensor subsystem measures the temperature within the fuel pump and outputs an over-temperature signal when the measured temperature is above a predetermined threshold temperature value. A timing circuit monitors the pressure sensor subsystem and the temperature sensor subsystem for output of the under-pressure and over-temperature signals and outputs a pump disconnect signal when at least one of the signals is output for a prescribed time duration. A power controller disengages power from the pump upon output of a pump disconnect signal by the timing circuit.
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Czyl Peter Edward
Koharcheck Alan William
Scanderbeg Berardino C.
Fulwider Patton Lee & Utecht LLP
Hydro-Aire, Inc.
Solak Timothy P.
Tyler Cheryl
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