Patent US3921458A successfully refreshed from Google Patents.
US3921458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isokinetic sampling probe
Assignee: Occidental Petroleum Corp
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Filing: 1974-03-01
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Granted: 1975-11-25
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Expires: 1994-03-01
Abstract
Abstract A fluid sampling probe system consists of circularly arcuate tube having a first end to be disposed outside a conduit through which fluid travels along a flow path, and a second end disposed inside the conduit at or near its center in a plane aligned to the flow path of the fluid and substantially parallel thereto. The second end of the tube faces the path of fluid flow for accurate sampling of the fluid with minimal disturbance to flow. The first end of the tube is connectible to sampling means capable of withdrawing fluid from the conduit at the same linear velocity of the fluid flowing through the conduit. A supporting sleeve is attached to the conduit by an external weld joint where the tube enters the conduit and acts in cooperation with a combined seal to seal the probe against leakage, control the extension of the probe into the conduit as well as align it with the axial path of flow of fluid through the conduit for accurate sampling of the fluid composition.
Inventors
- 👤 Forrest E Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:16
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N2001/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
205 words
Apparatus for sampling the composition of a fluid flowing through a conduit which comprises: a. a circularly arcuate hollow probe having a first open end to be disposed outside said conduit for attachment to a fluid sampling means; a second open end to be disposed within said conduit at a substantial distance from the point of entry of said probe into said conduit, at approximately the center line of said conduit and in a plane transverse to the path of fluid flow, said probe having along the circularly arcuate length thereof means to limit the extension of said probe into said conduit; b. a circularly arcuate hollow sleeve for closely surrounding and preventing rotation of said probe in said conduit, said sleeve having one end for external attachment to said conduit about the point of entry of said probe into said conduit and a second end to receive said probe in slidable relation, said second end for cooperation with the means on said probe to limit the extension of said probe into said conduit; c. means to secure said probe to said sleeve and provide a fluid tight seal at the second end of said sleeve, to prevent leakage between said probe and said sleeve.
Claim 2
Dependent Claim
205 words
Apparatus for sampling the composition of a fluid flowing through a conduit which comprises: a. a circularly arcuate hollow probe having a first open end to be disposed outside said conduit for attachment to a fluid sampling means; a second open end to be disposed within said conduit at a substantial distance from the point of entry of said probe into said conduit, at approximately the center line of said conduit and in a plane transverse to the path of fluid flow, said probe having along the circularly arcuate length thereof means to limit the extension of said probe into said conduit; b. a circularly arcuate hollow sleeve for closely surrounding and preventing rotation of said probe in said conduit, said sleeve having one end for external attachment to said conduit about the point of entry of said probe into said conduit and a second end to receive said probe in slidable relation, said second end for cooperation with the means on said probe to limit the extension of said probe into said conduit; c. means to secure said probe to said sleeve and provide a fluid tight seal at the second end of said sleeve, to prevent leakage between said probe and said sleeve.
Claim 3
Dependent Claim
48 words
Apparatus claimed in claim 1, additionally comprising a suction pump connected to the first end of the probe, the suction pump being capable of drawing fluid from the conduit through the probe at a mass velocity equal to the mass velocity of the fluid flowing through the conduit.
Claim 4
Dependent Claim
29 words
Apparatus as claimed in claim 1 in which the ratio of the radius of curvature of the probe to the width of the conduit is at least about 5:1.
Claim 5
Dependent Claim
20 words
Apparatus as claimed in claim 1 in which the sleeve is connected to the conduit by an external weld joint.
Claim 6
Dependent Claim
28 words
Apparatus as claimed in claim 1 in which the second open end of said circularly arcuate probe is positioned substantially coaxial with the center line of said conduit.
Claim 7
Dependent Claim
43 words
Apparatus as claimed in claim 1 in which the second open end of said circularly arcuate hollow probe is disposed upstream of the point of entry of the probe into the conduit and with respect to the flow of fluid through said conduit.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |