Patent US3082814A successfully refreshed from Google Patents.
US4173889A
Expired / Lapsed
US
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Ultrasonic flowmeter
Assignee: Thales Avionics SAS
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Filing: 1978-03-20
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Granted: 1979-11-13
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Expires: 1998-03-20
Abstract
Abstract An ultrasonic flowmeter for measuring the rate of flow of a fluid, comprising a conduit and two acoustic probes placed on a line inclined with respect to the axis of said conduit. The active end of the probes are bathing in an annular chamber formed by a sleeve extending the inner wall of the conduit in the measuring zone and a swell in the inner wall of the conduit, and in which the fluid may penetrate.
Inventors
- 👤 Michel Forster
- 👤 Pierre Rampin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:51
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66; G01F1/662; B; B60; B60G; B60G2401/00; B60G2401/17; B60G2401/176
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
An ultrasonic flowmeter for measuring the rate of flow of a fluid, comprising: a conduit in which said fluid flows; at least two acoustic probes placed outside the flow of fluid on a line inclined with respect to the axis of said conduit, said probes having an active end disposed in a recess in which the fluid, of which the rate of flow is to be measured, may penetrate without circulating therein, said recess being constituted by a discontinuity, in a measuring zone, of the inner wall of the conduit; and a sleeve disposed in said discontinuity provided with openings through which the fluid may pass, said sleeve having an internal diameter essentially equal to an internal diameter of said conduit for ensuring continuity of the flow of fluid, said conduit comprising a first conduit part and a second conduit part, said first and second conduit parts threadably interconnected, said first part comprising, near said threadable connection, a swell, said swell comprising said discontinuity and in combination with said sleeve, forming an annular chamber.
Claim 2
Dependent Claim
174 words
An ultrasonic flowmeter for measuring the rate of flow of a fluid, comprising: a conduit in which said fluid flows; at least two acoustic probes placed outside the flow of fluid on a line inclined with respect to the axis of said conduit, said probes having an active end disposed in a recess in which the fluid, of which the rate of flow is to be measured, may penetrate without circulating therein, said recess being constituted by a discontinuity, in a measuring zone, of the inner wall of the conduit; and a sleeve disposed in said discontinuity provided with openings through which the fluid may pass, said sleeve having an internal diameter essentially equal to an internal diameter of said conduit for ensuring continuity of the flow of fluid, said conduit comprising a first conduit part and a second conduit part, said first and second conduit parts threadably interconnected, said first part comprising, near said threadable connection, a swell, said swell comprising said discontinuity and in combination with said sleeve, forming an annular chamber.
Claim 3
Dependent Claim
42 words
A flowmeter according to claim 1, wherein the thickness of said sleeve is reduced opposite each of said probes and said sleeve is made of steel with electroformed nickel film forming a thin membrane to comprise the reduced thickness of said sleeve.
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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |