Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent
1996-10-07
1998-12-01
Jordan, Charles
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
F16K 1700
Patent
active
H00017612
ABSTRACT:
A leak detector and shut-off apparatus shuts off hydraulic fluid downstream o prevent the hazards attendant hydraulic failure such as loss of fluid and fire. A first sensor is coupled to a supply line for hydraulic fluid to produce pressure differential force F.sub.s, which is representative of the flow of hydraulic fluid. A second sensor is coupled to a return line for hydraulic fluid to produce pressure differential force F.sub.r that is representative of flow of hydraulic fluid. A compensator creates representation F.sub.c of the rate of accumulation of hydraulic fluid in the hydraulic circuit downstream of the device and a safety margin. A shutoff mechanism is connected to the first and second sensors and the compensator to shut off the supply and return lines when F.sub.s is greater than the sum of F.sub.r and F.sub.c. Mechanical and electrical designs shutoff or isolate downstream hydraulic actuators, branches or select components immediately when a leak is detected to prevent loss of fluid and to reduce the hazards of fire.
REFERENCES:
patent: 1206806 (1916-12-01), Borden
patent: 1339798 (1920-05-01), Thompson
patent: 3568705 (1971-03-01), Boyadjieff
patent: 4535797 (1985-08-01), Rosaen
patent: 4892114 (1990-01-01), Maroney et al.
Holtrop John W.
Manion John K.
Chelliah Meena
Church Stephen J.
Jordan Charles
Sliwka Melvin J.
The United States of America as represented by the Secretary of
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