US4058015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contamination trap for pressure gauges
Assignee: ConocoPhillips Co
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Filing: 1977-01-10
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Granted: 1977-11-15
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Expires: 1997-01-10
Abstract
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.
Inventors
- 👤 Ralph A. Stode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:55
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0627; G01L19/0636
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
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.
Claim 2
Dependent Claim
105 words
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.
Claim 3
Dependent Claim
22 words
The contamination trap described in claim 1 wherein the first and second fluids are substantially chemically inert with respect to each other.
Claim 4
Dependent Claim
22 words
A contamination trap as described in claim 1 wherein the first fluid is mercury and the second fluid is a silicone oil.
Claim 5
Dependent Claim
24 words
A contamination trap as described in claim 1 wherein said buffer tube has a capacity of from about 1 to about 10 cubic centimeters.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |