Patent US3902367A successfully refreshed from Google Patents.
US3902367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeters
Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1974-03-29
•
Granted: 1975-09-02
•
Expires: 1994-03-29
Abstract
Abstract A fluid flowmeter which includes a fluidic oscillator with feedback loops from its side walls to its control nozzles. At the junctions between the feedback loops and the side walls of the oscillator the feedback loops are arranged at an angle such that they do not face into the direction of flow of the fluid stream through the oscillator.
Inventors
- 👤 John Grant
- 👤 Andrew John Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:27
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/32; G01F1/3227; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2224
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
In a fluid flow meter including a fluidic oscillator with means for measuring the frequency of oscillation, the oscillator including feedback loops from its attachment walls to its control nozzles, in which oscillations are dependent on bulk flow through the feedback loops rather than by fluid wave effects, the improvement such that at the junctions between the feedback loops and the attachment walls the feed back loops are at right angles or less to the upstream portions of the attachment walls.
Claim 2
Dependent Claim
81 words
In a fluid flow meter including a fluidic oscillator with means for measuring the frequency of oscillation, the oscillator including feedback loops from its attachment walls to its control nozzles, in which oscillations are dependent on bulk flow through the feedback loops rather than by fluid wave effects, the improvement such that at the junctions between the feedback loops and the attachment walls the feed back loops are at right angles or less to the upstream portions of the attachment walls.
Claim 3
Dependent Claim
27 words
Apparatus as claimed in claim 1 wherein at said junctions said feedback loops face away from the direction of flow of the fluid stream through the oscillator.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |