Patent US3241367A successfully refreshed from Google Patents.
US3241367A
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Apparatus for measuring the mass flow of fluids
Assignee: Plessey UK Ltd
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Filing: 1963-01-28
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Granted: 1966-03-22
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Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Moss Norman
- 👤 Oldfield Thomas Alfred
- 👤 Kahn Peter Bruno
- 👤 Coleman Kenneth John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:39
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01F1/80; G01F1/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A MASS FLOW-METER FOR FLUID FLOWING IN A DUCT, WHICH COMPRISES IN COMBINATION A STATIONARY DEFLECTOR MEANS INCLUDING VARIABLE-ANGLE DEFLECTOR VANES ARRANGED IN THE DUCT AND ADAPTED TO IMPART TO THE FLUID A SWIRL ABOUT THE AXIS OF THE DUCT, A FIRST MEASURING MEANS INCLUDING A FLOW-RESPONSIVE ROTOR AND HAVING AN OUTPUT MEASURING THE RATE OF SWIRL PRODUCED BY SAID STATIONARY DEFLECTOR MEANS, A SECOND MEASURING MEANS HAVING AN OUTPUT MEASURING A TORQUE REACTION PRODUCED BY THE SWIRLING MOVEMENT OF THE FLUID FLOWING THROUGH THE DUCT, SAID SECOND MEASURING MEANS INCLUDING TORQUE-RESPONSIVE REACTOR MEANS, FLUID-FLOW-RESPONSIVE MEANS OPERATIVE TO RESPECTIVELY SO DECREASE AND INCREASE AUTOMATICALLY THE ANGLES OF SAID DEFLECTOR VANES TO THE LONGITUDINAL DIRECTION OF THE DUCT IN RESPONSE TO INCREASE AND DECREASE IN THE RATE OF FLOW OF FLUID THROUGH THE DUCT AS TO KEEP THE SPEED OF SAID ROTOR WITHIN CONVENIENT LIMITS AT HIGH FLOW RATES WITHOUT LETTING IT FAL SO LOW AS TO BE UNDULY AFFECTED BY FRICTION WHEN THE RATE OF FLOW IS LOW, AND COMPUTER MEANS
Claim 2
Dependent Claim
171 words
A MASS FLOW-METER FOR FLUID FLOWING IN A DUCT, WHICH COMPRISES IN COMBINATION A STATIONARY DEFLECTOR MEANS INCLUDING VARIABLE-ANGLE DEFLECTOR VANES ARRANGED IN THE DUCT AND ADAPTED TO IMPART TO THE FLUID A SWIRL ABOUT THE AXIS OF THE DUCT, A FIRST MEASURING MEANS INCLUDING A FLOW-RESPONSIVE ROTOR AND HAVING AN OUTPUT MEASURING THE RATE OF SWIRL PRODUCED BY SAID STATIONARY DEFLECTOR MEANS, A SECOND MEASURING MEANS HAVING AN OUTPUT MEASURING A TORQUE REACTION PRODUCED BY THE SWIRLING MOVEMENT OF THE FLUID FLOWING THROUGH THE DUCT, SAID SECOND MEASURING MEANS INCLUDING TORQUE-RESPONSIVE REACTOR MEANS, FLUID-FLOW-RESPONSIVE MEANS OPERATIVE TO RESPECTIVELY SO DECREASE AND INCREASE AUTOMATICALLY THE ANGLES OF SAID DEFLECTOR VANES TO THE LONGITUDINAL DIRECTION OF THE DUCT IN RESPONSE TO INCREASE AND DECREASE IN THE RATE OF FLOW OF FLUID THROUGH THE DUCT AS TO KEEP THE SPEED OF SAID ROTOR WITHIN CONVENIENT LIMITS AT HIGH FLOW RATES WITHOUT LETTING IT FAL SO LOW AS TO BE UNDULY AFFECTED BY FRICTION WHEN THE RATE OF FLOW IS LOW, AND COMPUTER MEANS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |