US3965747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas sampling system and method
Assignee: JOY ENVIRONMENTAL TECHNOLOGIES
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Filing: 1972-10-24
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Granted: 1976-06-29
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Expires: 1992-10-24
Abstract
Abstract A gas sampling system and method which employ a vacuum pressure regulator in a gas sampling train to simplify isokinetic sampling at selected locations of a sampling nozzle in a gas conducting flue.
Inventors
- 👤 Richard E. McCorkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:02
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N1/24; G01N2001/225
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A method of isokinetic sampling of a flowing stream of particulate bearing gases comprising the steps of; applying a vacuum to a sampling train communicating with such a stream; measuring the volume rate of gas flow from such a stream through said train; continuously controlling the vacuum pressure of the gas flowing through said train to provide a constant internal vacuum pressure within said train; and said controlling of vacuum pressure is in response to sensing the pressure difference between the gas pressure within the sampling train and the ambient air pressure.
Claim 2
Independent Claim
92 words
A method of isokinetic sampling of a flowing stream of particulate bearing gases comprising the steps of; applying a vacuum to a sampling train communicating with such a stream; measuring the volume rate of gas flow from such a stream through said train; continuously controlling the vacuum pressure of the gas flowing through said train to provide a constant internal vacuum pressure within said train; and said controlling of vacuum pressure is in response to sensing the pressure difference between the gas pressure within the sampling train and the ambient air pressure.
Claim 3
Dependent Claim
29 words
A method of isokinetic sampling as set forth in claim 1 comprising the additional step of filtering said gas flow before said measuring of the rate of gas flow.
Claim 4
Dependent Claim
41 words
The method of isokinetic sampling as set forth in claim 1 comprising the additional step of condensing the moisture from said gas flow and setting said moisture condensed from said gas flow before said measuring of the rate of gas flow.
Claim 5
Dependent Claim
40 words
A method of isokinetic sampling as set forth in claim 1 wherein said sensed difference in pressures is used to open a vacuum control valve in said sampling train when said difference in pressures becomes less than a selected value.
Claim 6
Dependent Claim
22 words
A method of isokinetic sampling as set forth in claim 4 wherein said vacuum control valve is closed by applied atmospheric pressure.
Claim 7
Dependent Claim
49 words
A method of isokinetic sampling as set forth in claim 5 wherein said applied pressure is provided by a diaphragm operated valve opened by ambient air at atmospheric pressure on one side of a diaphragm working against spring force and vacuum pressure on the other side of said diaphragm.
Claim 8
Dependent Claim
39 words
A method of isokinetic sampling as set forth in claim 6 wherein said gas pressure within said train is sensed by direct communication of said diaphragm with said gas flow at the point of measuring said rate of flow.
Claim 9
Dependent Claim
31 words
A method of isokinetic sampling as set forth in claim 7 including the additional step of continuously displaying the amount of vacuum pressure as measured in the vicinity of said diaphragm.
Claim 10
Dependent Claim
38 words
A method of isokinetic sampling as set forth in claim 1 wherein said applying of vacuum is capable of producing a rate of flow greater than the desired volume rate of flow of such stream through said train.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |