Method and apparatus for detecting leaking valves in a volumetri

Details Method and apparatus for detecting leaking valves in a volumetri Method and apparatus for detecting leaking valves in a volumetri

1984-05-21

1986-07-22

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

73269, 128DIG12, 222 23, 222250, 340540, 340679, 604246, G08B 2100

Patent

active

046022490

ABSTRACT:
A method and apparatus for detecting leaking valves in a volumetric fluid delivery system. The system employs a volumetric chamber divided into two compartments by a moveable membrane, with each compartment having a valved inlet and a valved outlet. In the system, fluid is delivered in discrete increments by alternately opening an inlet and an outlet on opposite sides of the membrane. Between such delivery periods, all valves are closed, and then only a single valve is opened. The membrane is monitored to detect movement while the single valve is opened, indicating a closure failure in one of the supposedly closed valves.

REFERENCES:
patent: 4037598 (1977-07-01), Georgi
patent: 4191184 (1980-03-01), Carlisle
patent: 4204538 (1980-05-01), Cannon
patent: 4207871 (1980-06-01), Jenkins
patent: 4315523 (1982-02-01), Mahawili
patent: 4391598 (1983-07-01), Thompson
patent: 4431425 (1984-02-01), Thompson et al.
patent: 4493709 (1985-01-01), Smith

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