Contamination trap for pressure gauges
AssigneeContinental Oil Company
InventorRalph A. Stode
Life of this patent
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Abstract
Pressure sensors or pressure gauges are protected from water and other foreign materials by a pressure sensitive contamination trap comprising a sealed vessel containing a first fluid, said vessel having an intake conduit to the vessel interior above the level of the first fluid and buffer tube filled with a second fluid, said buffer tube projecting below the level of the first fluid, said second fluid being in contact with said first fluid at one end of the buffer tube and with a pressure sensor at the other end of the buffer tube. The second fluid is of a lower specific gravity and immiscible with the first fluid. The two fluids are preferably chemically inert with respect to each other.
Claims4
A pressure sensitive contamination trap to protect pressure sensors from water and other foreign materials, comprising a sealed vessel containing a first fluid, said vessel having an intake conduit to the vessel interior above the level of the first fluid, and a buffer tube filled with a second fluid, said buffer tube projecting below the level of the first fluid, said second fluid being in contact with said first fluid at one end of the buffer tube and with a pressure sensor at the other end of the buffer tube, wherein said second fluid is of lower specific gravity and immiscible with said first fluid.
Dependencies are inferred from the claim text.