Piezoelectric flow control valve

Details Piezoelectric flow control valve Piezoelectric flow control valve

1986-10-31

1988-03-01

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Fluid link or column actuator

123458, 123447, 123498, 239584, F02M 5106

Patent

active

047280743

ABSTRACT:
A piezoelectric flow control valve comprising a slidable closure member (22) for controlling a flow of fluid through a fluid passage (42) between a fluid inlet (40) and a fluid outlet (32). The closure member (22) is biased toward a normally closed position by a plunger (70) responsive to a hydraulic pressure in a pressure chamber (78) which is in fluid communication with the fluid inlet (40) through a restriction and with a pumping chamber (96) of a piezoelectric pump (72). In order to prevent fluid leakage under situations wherein the fluid pressure at the fluid inlet (40) is not high enough to ensure closure of the member (22), the present invention provides spring biased pressure mechanism (106) for biasing the closure member (22) toward the normally closed position and override means (130) for overriding the pressure mechanism (106) in response to a predetermined pressure at the fluid inlet (40).

REFERENCES:
patent: 4022166 (1977-05-01), Bart
patent: 4535743 (1985-08-01), Igashira
patent: 4584980 (1986-04-01), Weiger
English translation of abstract of Japanese Patent Publication No. 59-206668, 11/22/84.

Affiliated with

Also associated with

Rating

Piezoelectric flow control valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piezoelectric flow control valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric flow control valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-993733