Patent ID: 6981518
Filing Date: 2006-01-03
Classification: F15C,F16K,G05D,Y10T

Abstract:
1. A flow regulating system, comprising: a first flow channel for conveying liquids having a first flow resistance; a first bi-stable latching valve in communication with the first flow channel for selectively blocking liquid flow through the first flow channel, said first bi-stable valve comprising a valve seat defining a valve chamber in communication with the first flow channel and a first protrusion extending into the valve chamber to selectively block fluid flow through the chamber, a piezoelectric actuator for selectively moving the valve seat between an open position in which the valve seat allows fluid flow through the valve chamber and a closed position wherein the first protrusion blocks first flow channel, a magnetic latch for locking the valve in a closed position; a second flow channel for conveying liquids having a second flow resistance; and a second bi-stable latching valve in communication with the second flow channel for selectively blocking liquid flow through the second flow channel, comprising a piezoelectric actuator for selectively opening and blocking the second flow channel, and a magnetic latch for locking the valve in a closed position.