Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1993-06-28
2000-01-18
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
251 634, 251 635, 251 636, 251291, 403378, 137556, F16K 31126, F16K 31122, F16K 3700
Patent
active
06015134&
ABSTRACT:
An actuator used to close and open a shut-in valve of a flowline. An indicator rod is threadedly connected to a connector which, in turn, is threadedly connected to the valve stem of the shut-in valve. A compression spring extends between a diaphragm plate and the bottom of the actuator. The shut-in valve is opened by pneumatic pressure above the diaphragm and the compression spring closes the shut-in valve by moving the valve stem when the pneumatic pressure above the diaphragm is exhausted to the atmosphere. The actuator including the compression spring may be disconnected from the bonnet on which the actuator is attached by rotating the indicator rod and removing the attachment bolts between the actuator and the attachment flange. The connector will be left on the valve stem.
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Copies from trade journals of five (5) actuators as follows: 1/5 Otis; 2/5 Axelson, Inc.; 3/5 Baker Oil Tool; 4/5 W-K-M; 5/5 Barber Ltd. (the Applicant) (Dates Unknown).
Barber Industries Inc.
Russell Uren John
Walton George L.
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