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US 11,835,181 B2Granted
Attachable/detachable pressure evacuation device
AssigneeWestem Valve Inc.
InventorsDennis C. Hatfield, Steve K. Aderholt
Life of this patent
Estimating the term…
Abstract
A pressure evacuation device for a compressed gas cylinder having a fixed assembly that is semi-permanently attached to an opening in the cylinder and comprises a retractable bleed valve, and a detachable assembly that can be readily attached to and detached from the fixed assembly and comprises a valve stem to control the bleed valve and a valve tee to direct the flow of gas from the cylinder.
Claims24
A pressure relief device for a high-pressure compressed gas cylinder comprising:
- a fixed assembly comprising a bull plug and a bleed valve, the bull plug comprising a top opening and a bottom opening which are on opposite ends of a bull plug cavity within which the bleed valve is positioned;
- and
- a detachable assembly comprising a valve stem and a valve tee, the valve stem positioned at least in part within an interior cavity of the valve tee and configured to open the bleed valve to allow gas to escape from an interior of the cylinder through the fixed assembly and detachable assembly and out the valve tee,
- where the fixed assembly is configured to be screwed into and out of an opening in the cylinder, and
- where the detachable assembly is configured to be screwed into and out of the top opening of the bull plug.
2 more elements
A method for removing compressed gas from a high pressure compressed gas cylinder, the method comprising:
- attaching a detachable assembly into a fixed assembly on the cylinder by mating outside threads on a lower portion of the detachable assembly with inside threads in an opening in an upper portion of the fixed assembly, where the detachable assembly comprises a valve tee and a rotatable valve stem, where the fixed assembly comprises a cavity between the interior of the cylinder and the exterior of the cylinder, and where a retractable bleed valve resides within the cavity;
- engaging the valve stem with the bleed valve;
- rotating the valve stem to retract the bleed valve and allow the passage of gas from the cylinder through the cavity, into the valve tee, and out the valve tee;
- and
- rotating the valve stem to unretract the bleed valve and stop the passage of gas from the cylinder.
2 more elements
Dependencies are inferred from the claim text.