Patent ID: 6729849
Filing Date: 2004-05-04
Classification: F04B,G05D

Abstract:
A constant-pressure pump controller system for maintaining a substantially uniform discharge pressure of liquid output from a pump operated by an electric motor and delivered to a plurality of downstream outlets, comprising:a) a pressure transducer in flow communication with the discharge from said pump for sensing changes in discharge pressure from the pump by providing a variable mechanical motion, the pressure transducer having a movable piston with a tension adjustable spring disposed therewithin; b) a sensor for converting said sensed changes in discharge pressure to a variable electric signal; c) a controller electrically connected to the motor to receive said variable signals from said sensor to adjust the speed of said motor to maintain constant pressure from the discharge of said pump; and d) a high-voltage sensor and power cut-off for terminating electrical power to the pump upon sensing a predetermined voltage value.