Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1993-07-02
1995-06-20
Schwadron, Martin P.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
1374925, 1375135, F16K 3112
Patent
active
054253969
ABSTRACT:
A fluid pressure variation valve for use in pressurized fluid systems situated in a pressurized fluid line, for the purpose of reducing the pressure in the fluid line when fluid is not in use, while allowing the normal high fluid pressure of the pressurized fluid system to be maintained when fluid is in use. The valve unit comprises a hollow housing where a valve is moveably situated. A diaphragm is attached to the valve. Two relief valves are disposed in the hollow housing. A first relief valve provides selective communication between the inlet and outlet of the valve housing. In the closed position, the valve defines a first chamber at the inlet of the valve body. A second chamber is defined between the outlet of the valve housing and the second relief valve. A third chamber is defined between the diaphragm and a passage connecting the second relief valve. The third chamber allows selective communication with the outlet via the second relief valve. A fourth chamber, vented, is on the other side of the diaphragm, adjacent to the second chamber, the vented chamber contains a spring. The inlet of the valve housing communicates with the second chamber via a restrictive passage. At the first position, when there is not fluid flow, the diaphragm biases the valve towards the inlet, shutting off communication between the inlet and outlet, thereby causing the pressure at outlet to be lower than at the inlet. At the second position, when there is fluid flow out of the first and second chambers, the spring pushes the diaphragm which drags the valve away from the first position such that the valve opens communication between the inlet and outlet of the valve housing, thereby fluid pressure at the inlet and outlet of the valve body equalizes to the pressure of the pressurized fluid line.
REFERENCES:
patent: 3111138 (1963-11-01), Humphreys et al.
patent: 3727836 (1973-04-01), Visos et al.
patent: 4682622 (1987-07-01), Weber
patent: 5215115 (1993-06-01), Dietiker
Lee Kevin L.
Schwadron Martin P.
LandOfFree
Water pressure level 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 Water pressure level control valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water pressure level control valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1839336