Fluid flow measuring apparatus
Abstract
Abstract APPARATUS FOR MESURING THE FLOW OF FLUID THROUGH A MAIN SUPPLY LINE BY THE USE OF A FIRST SHUNT FLUID FLOW PATH ACROSS A FIRST RESTRICTIVE ELEMENT IN THE MAIN LINE. THE FIRST SHUNT PATH INCLUDES SECOND AND THIRD RESTRICTIVE ELEMENTS. A SECOND SHUNT FLUID FLOW PATH IS CONNECTED ACROSS THE THIRD RESTRICTIVE ELEMENT IN THE FIRST SHUNT PATH. THE SECOND SHUNT PATH INCLUDES A CONDUIT AT LEAST A PORTION OF WHICH IS ELECTRICALLY AND THERMALLY CONDUCTIVE, THE CONDUCTIVE PORTION HAVING ONE OR MORE THERMOELECTRIC DEVICES POSITIONED THEREALONG. HEATING CURRENT IS PASSED THROUGH THE CONDUCTIVE CONDUIT PORTION, AND THE TEMPERATURE GRADIENT CAUSED BY FLUID FLOW THROUGH THE HEATED CONDUIT IS SENSED BY THE THERMOELECTRIC DEVICES TO PROVIDE AN INDICATION OF MASS FLOW IN THE MAIN LINE SUBSTANTIALLY INDEPENDENTLY OF PRESSURE AND TEMPERATURE.
Inventors
- 👤 William C Baker
- 👤 James M Benson
- 👤 Edmond Easter
Bibliographic Details
Claims Analysis
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |