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US 2026/0146682 A1Published application
Freeze-Safe Heat Pipe Valve Stem
OwnerMatthew David Carlsoninventor
Life of this patent
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Abstract
Valves that include a hollow valve stem with an internal heat transfer fluid that naturally circulates within the stem acts as a heat pipe to the valve bonnet to prevent fluid within the valve from freezing. This approach protects the valve body, stem, bonnet and sealing material such as valve packing or a bellows from being damaged by frozen fluid at any location within the valve.
Claims10
A valve, comprising:
- a valve bonnet;
- a valve stem having a length disposed within the valve bonnet, the valve stem comprising an internal chamber comprising an interior wall that extends axially along part of the length of the valve stem;
- a valve body comprising a flow passage and a valve seat into which the valve stem extends when the flow control valve is in a closed position thereby stopping flow of a system fluid through the valve body;
- and
- a heat transfer medium disposed in the chamber;
- wherein the heat transfer medium is a fluid at a selected operating temperature of the flow control valve.
3 more elements
Dependencies are inferred from the claim text.