US3690171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow measurement
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1970-10-15
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Granted: 1972-09-12
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Expires: 1990-10-15
Abstract
Abstract A fluidic oscillator may be used to measure the flow rate of fluids. In a flow meter in accordance with the invention a fluidic oscillator has its control ports cross-connected to induce oscillation and differential pressure sensing means housed in the connection between the fluid outlet channels of the oscillator for converting alternating pressure in those channels to an electrical signal.
Inventors
- 👤 John Russell Tippetts
- 👤 Jack Alexander Golder
- 👤 John Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:30
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/32; G01F1/3227; G01P; G01P5/00; G01P5/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A fluid flow meter apparatus comprising a duct, a fluidic oscillator in said duct in which fluid oscillation is induced by a cross section between its control ports, said fluidic oscillator having an inlet nozzle and outlet channels, a connection member extending between said outlet channels, a differential pressure sensing means housed in said connection member for converting alternating pressure in said outlet channels to an electrical signal, flow restrictions provided in the outlet channels of the oscillator downstream of the connection housing the differential pressure sensing means, said duct communicating with said inlet nozzle at one end and connecting said outlet channels at the other end.
Claim 2
Dependent Claim
107 words
A fluid flow meter apparatus comprising a duct, a fluidic oscillator in said duct in which fluid oscillation is induced by a cross section between its control ports, said fluidic oscillator having an inlet nozzle and outlet channels, a connection member extending between said outlet channels, a differential pressure sensing means housed in said connection member for converting alternating pressure in said outlet channels to an electrical signal, flow restrictions provided in the outlet channels of the oscillator downstream of the connection housing the differential pressure sensing means, said duct communicating with said inlet nozzle at one end and connecting said outlet channels at the other end.
Claim 3
Dependent Claim
17 words
A fluid flow meter as claimed in claim 1 wherein the differential pressure sensing means is electromagnetic.
Claim 4
Dependent Claim
23 words
A fluid flow meter as claimed in claim 1 with means including a frequency meter correlating the electrical signal with the flow rate.
Claim 5
Dependent Claim
22 words
A fluid flow meter as claimed in claim 1 with means including a counter correlating the electrical signal with the flow rate.
Claim 6
Dependent Claim
28 words
A fluid flow meter as claimed in claim 1 wherein the connection housing the differential pressure sensing means extends through the connection number separating the fluid outlet channels.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |