Patent US3276258A successfully refreshed from Google Patents.
US3276258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass flowmeters
Assignee: Allard Way Holdings Ltd
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Filing: 1964-01-20
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Granted: 1966-10-04
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Rowley Richard Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:33
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01F1/80; G01F1/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A METER FOR MEASURING THE MASS FLOW RATE OF A FLUID COMPRISING MEANS DEFINING A FLOW PATH FOR THE FLUID, AN IMPELLER DISPOSED IN THE FLOW PATH TO IMPART AN ANGULAR VELOCITY ABOUT THE AXIS OF SAID FLOW PATH TO THE FLUID, A MOTOR FOR DRIVING THE IMPELLER, A COUPLING FORMING A DRIVING CONNECTION BETWEEN THE MOTOR AND THE IMPELLER, WHICH COUPLING IS RESILIENT AND ALLOWS THE IMPELLER TO LAG THE MOTOR BY AN ANGLE DEPENDENT ON THE ANGULAR MOMENTUM IMPARTED TO THE FLUID, MEANS FOR MEASURING THE TIME TAKEN FOR THE IMPELLER TO ROTATE THROUGH SAID ANGLE; AND MEANS RESPONSIVE TO THE MEASURING MEANS WHEN SAID TIME FALLS BELOW A FIRST PREDETERMINED VALUE AND OPERABLE ON THE MOTOR TO INCREASE THE ORIGINAL SPEED OF THE IMPELLER DIRECTLY TO A SPEED WHICH IS A MULTIPLE OF SAID ORIGINAL SPEED.
Claim 2
Dependent Claim
139 words
A METER FOR MEASURING THE MASS FLOW RATE OF A FLUID COMPRISING MEANS DEFINING A FLOW PATH FOR THE FLUID, AN IMPELLER DISPOSED IN THE FLOW PATH TO IMPART AN ANGULAR VELOCITY ABOUT THE AXIS OF SAID FLOW PATH TO THE FLUID, A MOTOR FOR DRIVING THE IMPELLER, A COUPLING FORMING A DRIVING CONNECTION BETWEEN THE MOTOR AND THE IMPELLER, WHICH COUPLING IS RESILIENT AND ALLOWS THE IMPELLER TO LAG THE MOTOR BY AN ANGLE DEPENDENT ON THE ANGULAR MOMENTUM IMPARTED TO THE FLUID, MEANS FOR MEASURING THE TIME TAKEN FOR THE IMPELLER TO ROTATE THROUGH SAID ANGLE; AND MEANS RESPONSIVE TO THE MEASURING MEANS WHEN SAID TIME FALLS BELOW A FIRST PREDETERMINED VALUE AND OPERABLE ON THE MOTOR TO INCREASE THE ORIGINAL SPEED OF THE IMPELLER DIRECTLY TO A SPEED WHICH IS A MULTIPLE OF SAID ORIGINAL SPEED.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |