Patent US3950995A successfully refreshed from Google Patents.
US3950995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ambient pressure probe
Assignee: United States Department of Commerce
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Filing: 1975-02-04
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Granted: 1976-04-20
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Expires: 1995-02-04
Abstract
Abstract Ambient or static pressure in a fluid stream is sensed with a hollow circr cylinder placed normal to the fluid stream. A shroud is mounted on the cylinder for adjustment over a ring of ports provided in the cylinder. In this manner, the relationship between the internal pressure in the cylinder and the ambient pressure is controllable. Ideally, the internal and ambient pressures are exactly equal. Further, extension of the cylinder above and below the shroud provides symmetry for positive and negative angles of attack.
Inventors
- 👤 Richard D. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
G; G01; G01M; G01M9/00; G01M9/06; G01L; G01L19/00; G01L19/0007; G01L19/0015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
An omnidirectional, weatherproof ambient pressure probe adapted for use in an undisturbed, predominantly horizontal wind field, comprising: a vertically mounted tube having a closed top and a ring of pressure ports intermediate its ends; a solid shroud adjustably sealed at its top about said tube and positioned over said ring of pressure ports to form a weatherproof, downwardly opening annular cavity about said ring of pressure ports, said shroud being positioned along said tube relative to said ports so that the pressure transmitted through said cavity and ports into said tube equals the true ambient pressure; and means for measuring said true ambient pressure in said tube.
Claim 2
Dependent Claim
107 words
An omnidirectional, weatherproof ambient pressure probe adapted for use in an undisturbed, predominantly horizontal wind field, comprising: a vertically mounted tube having a closed top and a ring of pressure ports intermediate its ends; a solid shroud adjustably sealed at its top about said tube and positioned over said ring of pressure ports to form a weatherproof, downwardly opening annular cavity about said ring of pressure ports, said shroud being positioned along said tube relative to said ports so that the pressure transmitted through said cavity and ports into said tube equals the true ambient pressure; and means for measuring said true ambient pressure in said tube.
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) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |