US3218852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeters
Assignee: Geosource Inc
•
Filing: 1962-04-04
•
Granted: 1965-11-23
•
Expires: 1982-04-04
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Scarpa
- 👤 Gerard G Gibney
- 👤 Bernard P Scarpa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:21
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66; G01F1/666
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A FLOWMETER FOR MEASURING THE VELOCITY OF FLUID FLOWING IN A CONDUIT WHICH COMPRISES IN COMBINATION A PIPESECTION INTERPOSED TO RECEIVE THE FLOW IN SAID CONDUIT, A PROBE HAVING A ROUGHENED END SURFACE MOUNTED IN AN INNER WALL OF SAID PIPE-SECTION, SAID PROBE INCLUDING A TRANSDUCER ACOUSTICALLY COUPLED TO SAID END SURFACE AND RESPONSIVE TO RANDOM FREQUENCY NOISE GENERATED BY THE SHEARING ACTION OF SAID FLUID AS IT FLOWS IN CONTACT WITH SAID ROUGBENED END SURFACE TO PRODUCE AN ELECTRICAL SIGNAL, CIRCUIT MEANS, INCLUDING AN AMPLIFIER, RECTIFIER, AND INDICATOR COUPLED TO RECEIVE THE SIGNAL FROM SAID TRANSDUCER, AMPLIFY AND RECTIFY SAID SIGNAL, AND PRODUCE A READING ON SAID INDICATOR WHICH IS A SUBSTANTIALLY LINEAR FUNCTION OF THE VELOCITY OF FLUID FLOWING IN SAID CONDUIT.
Claim 2
Dependent Claim
124 words
A FLOWMETER FOR MEASURING THE VELOCITY OF FLUID FLOWING IN A CONDUIT WHICH COMPRISES IN COMBINATION A PIPESECTION INTERPOSED TO RECEIVE THE FLOW IN SAID CONDUIT, A PROBE HAVING A ROUGHENED END SURFACE MOUNTED IN AN INNER WALL OF SAID PIPE-SECTION, SAID PROBE INCLUDING A TRANSDUCER ACOUSTICALLY COUPLED TO SAID END SURFACE AND RESPONSIVE TO RANDOM FREQUENCY NOISE GENERATED BY THE SHEARING ACTION OF SAID FLUID AS IT FLOWS IN CONTACT WITH SAID ROUGBENED END SURFACE TO PRODUCE AN ELECTRICAL SIGNAL, CIRCUIT MEANS, INCLUDING AN AMPLIFIER, RECTIFIER, AND INDICATOR COUPLED TO RECEIVE THE SIGNAL FROM SAID TRANSDUCER, AMPLIFY AND RECTIFY SAID SIGNAL, AND PRODUCE A READING ON SAID INDICATOR WHICH IS A SUBSTANTIALLY LINEAR FUNCTION OF THE VELOCITY OF FLUID FLOWING IN SAID CONDUIT.
References Cited (Backward Citations)
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Cited
US2708366A
Cited
US2760184A
Cited
US2912856A
Cited
US3078709A
Cited
US2936619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |