Patent ID: 7849870
Filing Date: 2010-12-14
Classification: F16K,G05D,Y10T

Abstract:
1. A pressure control valve comprising: a first flow control valve having a first chamber in fluid communication with a first port and a first pressure fitting received in the first port and having a first adjustable nozzle with one end portion located within the first chamber, a first sealing member located within the first chamber proximate the one end portion, and a first piezoelectric actuator located within the first chamber and coupled to the first sealing member; and a second flow control valve having a second chamber in fluid communication with a second port and a second pressure fitting received in the second port and having a second adjustable nozzle with one end portion located within the second chamber, a second sealing member located within the second chamber proximate the one end portion, and a second piezoelectric actuator located within the second chamber and coupled to the second sealing member, wherein the first chamber and the second chamber are in fluid communication and form a common plenum, and wherein actuation of the piezoelectric actuators moves a free face of the piezoelectric actuators to control fluid flow between the nozzles and the common plenum and thus control an output pressure from the common plenum.