US3885437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sampling exhaust stack effluent
Assignee: United States Department of Energy
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Filing: 1974-02-26
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Granted: 1975-05-27
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Expires: 1994-02-26
Abstract
Abstract Effluent discharging into the atmosphere from dry exhaust stacks is sampled by employing an effluent-gathering probe capable of obtaining representative samples of the total effluent exhausted through the stack. The probe travels on two axes in a cross sectional plane of the stack so as to move the probe in a spiral path across the radius of the stack to obtain homogeneous samples of the exhaust emissions.
Inventors
- 👤 Paul E Reagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:06
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N2001/2285; G01N2001/2291
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
An apparatus for obtaining a substantially homogeneous sampling of an effluent stream flowing through an elongated dry stack, comprising a fixture disposed within said stack, a tubulation supported by said fixture and projecting along the longitudinal axis of the stack, a rotatable shaft disposed within said tubulation, an arm secured to said shaft and extending in a direction orthogonal to the latter with said arm having a length substantially corresponding to the inner radius of said stack and displaceable in a cross-sectional plane of the latter in response to shaft rotation, slide means carried by said arm, an effluentgathering means affixed to said slide means, gear means coupling said slide means to said tubulation for effecting displacement of said effluent-gathering means along said arm in response to rotation of said shaft.
Claim 2
Independent Claim
131 words
An apparatus for obtaining a substantially homogeneous sampling of an effluent stream flowing through an elongated dry stack, comprising a fixture disposed within said stack, a tubulation supported by said fixture and projecting along the longitudinal axis of the stack, a rotatable shaft disposed within said tubulation, an arm secured to said shaft and extending in a direction orthogonal to the latter with said arm having a length substantially corresponding to the inner radius of said stack and displaceable in a cross-sectional plane of the latter in response to shaft rotation, slide means carried by said arm, an effluentgathering means affixed to said slide means, gear means coupling said slide means to said tubulation for effecting displacement of said effluent-gathering means along said arm in response to rotation of said shaft.
Claim 3
Dependent Claim
29 words
The apparatus claimed in claim 1, wherein said arm and said effluent-gathering means are displaced simultaneously for driving said effluent-gathering means along a path defined by an archimedean spiral.
Claim 4
Dependent Claim
64 words
The apparatus claimed in claim 2, wherein said slide means is a worm gear, said effluent-gathering means is a probe having an effluent-receiving opening at one end thereof and coupled to a vacuum source, and said gear means comprises a stationary bevel gear affixed to said tubulation and a rotatable bevel gear affixed to said worm gear and in mesh with said stationary gear.
References Cited (Backward Citations)
US2926527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |