Patent US3153341A successfully refreshed from Google Patents.
US3153341A
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Rotary fluid flowmeter sensing element
Assignee: De Havilland Aircraft Co Ltd
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Filing: 1961-11-28
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Granted: 1964-10-20
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Spaiding Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A ROTARY FLUID FLOWMETER SENSING ELEMENT COMPRISING A CONDUIT INTENDED FOR LONGITUDINAL FLUID FLOW THERETHROUGH, A BLADED ROTOR MOUNTED FOR ROTATION ABOUT A LONGITUDINAL AXIS IN SAID CONDUIT AND CAUSED TO ROTATE BY FLUID FLOW, HELICALLY TWISTED GUIDE VANES MOUNTED IN SAID CONDUIT DOWNSTREAM FROM THE ROTOR BLADES IN THE DIRECTION OF FLUID FLOW TO BE MEASURED AND ADAPTED TO IMPART ROTATATION TO A FLUID FLOW IN THE DIRECTION OPPOSITE TO THAT OF FLUID FLOW TO BE MEASURED, WHEREBY THE ROTATIONAL EFFECT UPON THE ROTOR OF FLUID FLOW IN SAID OPPOSITE DIRECTION IS LARGELY REDUCED.
Claim 2
Dependent Claim
95 words
A ROTARY FLUID FLOWMETER SENSING ELEMENT COMPRISING A CONDUIT INTENDED FOR LONGITUDINAL FLUID FLOW THERETHROUGH, A BLADED ROTOR MOUNTED FOR ROTATION ABOUT A LONGITUDINAL AXIS IN SAID CONDUIT AND CAUSED TO ROTATE BY FLUID FLOW, HELICALLY TWISTED GUIDE VANES MOUNTED IN SAID CONDUIT DOWNSTREAM FROM THE ROTOR BLADES IN THE DIRECTION OF FLUID FLOW TO BE MEASURED AND ADAPTED TO IMPART ROTATATION TO A FLUID FLOW IN THE DIRECTION OPPOSITE TO THAT OF FLUID FLOW TO BE MEASURED, WHEREBY THE ROTATIONAL EFFECT UPON THE ROTOR OF FLUID FLOW IN SAID OPPOSITE DIRECTION IS LARGELY REDUCED.
References Cited (Backward Citations)
US2146827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |