Pump and pump control circuit apparatus and method
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United States of America Patent
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Feb 1, 2011
Grant Date -
Jun 26, 2008
app pub date -
Oct 31, 2007
filing date -
Nov 26, 2001
priority date (Note) -
Expired
status (Latency Note)
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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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