Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Reexamination Certificate
2006-08-01
2006-08-01
Freay, Charles G. (Department: 3746)
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
C417S043000, C417S044100, C417S045000, C417S044900, C417S053000
Reexamination Certificate
active
07083392
ABSTRACT:
A method and apparatus for a pump and a pump control system. The apparatus includes pistons integrally formed in a diaphragm and coupled to the diaphragm by convolutes. The convolutes have a bottom surface angled with respect to a top surface of the pistons. The apparatus also includes an outlet port positioned tangentially with respect to the perimeter of an outlet chamber. The apparatus further includes a non-mechanical pressure sensor and a temperature sensor coupled to a pump control system. For the method of the invention, the microcontroller provides a pulse-width modulation control signal to an output power stage in order to selectively control the power provided to the pump. The control signal is based on the pressure within the pump, the current being provided to the pump, the voltage level of the battery, and the temperature of the pump.
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Gandhi Nikhil Jitrendo
Meza Humberto V.
Truong Quang Minh
Freay Charles G.
Michael & Best & Friedrich LLP
Sayoc Emmanuel
SHURflo Pump Manufacturing Company, Inc.
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