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US 5,146,942 AGranted
Low pressure fluid emergency shutdown valve
OwnerJulian S. Taylorinventor
Life of this patent
Estimating the term…
Abstract
A low fluid pressure emergency shutdown valve is formed by a valve body having a flow passageway interposed in a gas supply line downstream from a pressure regulator. A diaphragm responsive valve in the valve body is maintained open by a pin interposed between the valve stem and the downstream end portion of the valve body. Upstream fluid pressure, in response to a pressure regulator failing in the open position, above a predetermined limit biases the diaphragm downstream to collapse the pin and move the valve to a flow passageway closed position.
Claims4
A low pressure fluid conduit emergency shutdown valve comprising:
- a valve body having an inlet port and an outlet port forming a
- fluid passageway interposed in a conduit;
- a valve seat in the inlet port;
- normally open valve means supported by said body for movement
- toward said valve seat and closing the fluid passageway;
- and, axially collapsible pin means for normally
- biasing said valve means toward a fluid passageway open position and diaphragm means for biasing said valve means toward said valve seat in response to a predetermined value of fluid pressure in the fluid passageway.
4 more elements
Dependencies are inferred from the claim text.