US3788140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustical flow metering apparatus
Assignee: SPX Technologies Inc
•
Filing: 1972-02-25
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Granted: 1974-01-29
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Expires: 1992-02-25
Abstract
Abstract The disclosure concerns electroacoustical flow metering apparatus in which the transponder probes define an acoustic path located in the throat of a differential pressure-producing flow metering device.
Inventors
- 👤 Q Turtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:55
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/66
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
Flow metering apparatus comprising a. a differential pressure-producing flow meter including an inlet section, a throat of reduced cross section, a converging section for leading fluid from the inlet section to the throat, and a pair of pressure taps for sensing differential pressure, at least one of said taps being in the throat; b. an electroacoustical flow meter including two opposed transponder probes associated with the throat and located at opposite ends of an acoustic path which extends diametrically across the throat at an oblique angle to the axis thereof; and c. said converging section including a tapering portion which intersects the throat along an edge and the two probes are so positioned that the acoustic path is located downstream of the position where the vena contracta rejoins the wall of the throat.
Claim 2
Dependent Claim
133 words
Flow metering apparatus comprising a. a differential pressure-producing flow meter including an inlet section, a throat of reduced cross section, a converging section for leading fluid from the inlet section to the throat, and a pair of pressure taps for sensing differential pressure, at least one of said taps being in the throat; b. an electroacoustical flow meter including two opposed transponder probes associated with the throat and located at opposite ends of an acoustic path which extends diametrically across the throat at an oblique angle to the axis thereof; and c. said converging section including a tapering portion which intersects the throat along an edge and the two probes are so positioned that the acoustic path is located downstream of the position where the vena contracta rejoins the wall of the throat.
Claim 3
Dependent Claim
19 words
Flow metering apparatus as in claim 1, wherein the other of said pressure taps is in the inlet section.
Claim 4
Dependent Claim
25 words
Flow metering apparatus as in claim 1, wherein the converging section includes a first and second tapering portion which intersect each other along an edge.
Claim 5
Dependent Claim
17 words
Flow metering apparatus as in claim 1, wherein the probes are also downstream of the throat tap.
References Cited (Backward Citations)
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US2971329A
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US3406569A
Cited
US3387492A
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US3686946A
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US3702144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |