Patent US2989653A successfully refreshed from Google Patents.
Patent US3672225A successfully refreshed from Google Patents.
US3672225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas sampling
Assignee: AECI Ltd
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Filing: 1970-08-13
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Granted: 1972-06-27
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Expires: 1990-08-13
Abstract
Abstract Apparatus for sampling fluid flow in a conduit comprising a sampling probe having an aerodynamically shaped nozzle and a double static tube axially located within the nozzle and extending beyond its mouth to terminate in a closed, aerodynamically contoured end, the outer wall of the extended portion of the tube being provided with first and second orifices to communicate with the bore of the tube and the annular passage of the tube remote from the extended portion operatively communicating with a pressure sensing device to sense the static pressure of the fluid flow outside the nozzle and the static pressure of the fluid flow entering the mouth of the nozzle.
Inventors
- 👤 Rodney Brian Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N2001/225
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
208 words
Apparatus for sampling fluid flow in a conduit, comprising: a sampling probe, including means defining a tubular nozzle having means defining a mouth; a double static tube extending axially within said nozzle and extending out past the mouth thereof to terminate in means defining a closed, aerodynamically contoured end; said double static tube including means defining a longitudinal bore terminating short of said closed, aerodynamically contoured end; a means defining a first orifice communicating the exterior of the double static tube, toward said end from said mouth, with said bore; means defining an annular passage in said double static tube surrounding said bore, but being separated therefrom; means defining a second orifice communicating the exterior of the double static tube, toward said end from said mouth, with said annular passage; said first and second orifices being axially displaced from one another along said double static tube; a pressure sensing device for sensing the static pressure of the fluid flow outside the nozzle and the static pressure of the fluid flow entering the mouth of the nozzle; conduit means independently communicating said bore and said annular passage to said pressure sensing device remotely of and upstream of the mouth of the nozzle as inputs to said pressure sensing device.
Claim 2
Dependent Claim
208 words
Apparatus for sampling fluid flow in a conduit, comprising: a sampling probe, including means defining a tubular nozzle having means defining a mouth; a double static tube extending axially within said nozzle and extending out past the mouth thereof to terminate in means defining a closed, aerodynamically contoured end; said double static tube including means defining a longitudinal bore terminating short of said closed, aerodynamically contoured end; a means defining a first orifice communicating the exterior of the double static tube, toward said end from said mouth, with said bore; means defining an annular passage in said double static tube surrounding said bore, but being separated therefrom; means defining a second orifice communicating the exterior of the double static tube, toward said end from said mouth, with said annular passage; said first and second orifices being axially displaced from one another along said double static tube; a pressure sensing device for sensing the static pressure of the fluid flow outside the nozzle and the static pressure of the fluid flow entering the mouth of the nozzle; conduit means independently communicating said bore and said annular passage to said pressure sensing device remotely of and upstream of the mouth of the nozzle as inputs to said pressure sensing device.
Claim 3
Dependent Claim
36 words
Apparatus as claimed in claim 1 in which the first orifice for sensing the static pressure outside the nozzle is located at a distance of at least 13 tube diameters from the end of the tube.
Claim 4
Dependent Claim
49 words
Apparatus as claimed in claim 1 in which the second orifice for sensing the static pressure inside the nozzle is located no further upstream than a radial plane across the mouth of the nozzle at a distance of at least 21 tube diameters from the end of the tube.
Claim 5
Dependent Claim
33 words
Apparatus as claimed in claim 1 in which each of the pressure sensing orifices in the tube has a diameter of not more than one tenth of the external diameter of the tube.
Claim 6
Dependent Claim
30 words
Apparatus as claimed in claim 1 in which the nozzle of the probe is detachably connecTed thereto, so as to be interchangeable with other nozzles of different dimensions and shapes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |