US3918304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter computer
Assignee: CALDON Co LP
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Filing: 1974-07-09
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Granted: 1975-11-11
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Expires: 1994-07-09
Abstract
Abstract A system for accurately determining the velocity of a liquid relative to a pair of transducers disposed therein by exciting the transducers to inject acoustic signals into the liquid and measuring the time required for the signals to travel between the transducers to generate elapsed time signals is disclosed. From these elapsed time signals the velocity of the liquid relative to the transducers is calculated and from the velocity and the cross sectional area of the channel through which the liquid flows the flow rate of the liquid is calculated. The system is controlled and the elapsed time signals are processed by a hard wire programmable digital processor.
Inventors
- 👤 Joseph Abruzzo
- 👤 Frederick J Lori
- 👤 Theodore W Synowka
- 👤 Lawrence G Wright
- 👤 William H Foertsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:58
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/24; G01P5/245; G01F; G01F1/00; G01F1/66; G01F1/667
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A system for measuring the flow rate of a liquid comprising in combination: a. first and second transducers; means for energizing said first and second transducers to inject first and second acoustic signals into said liquid; b. means for detecting and for producing first and second elapsed time signals related to the flow rate of said liquid in response to said acoustic signals; and c. programmable digital processor means utilizing said first and second elapsed time signals to calculate the flow rate of said liquid by solving the following equation,
Claim 2
Independent Claim
90 words
A system for measuring the flow rate of a liquid comprising in combination: a. first and second transducers; means for energizing said first and second transducers to inject first and second acoustic signals into said liquid; b. means for detecting and for producing first and second elapsed time signals related to the flow rate of said liquid in response to said acoustic signals; and c. programmable digital processor means utilizing said first and second elapsed time signals to calculate the flow rate of said liquid by solving the following equation,
Claim 3
Dependent Claim
27 words
A system in accordance with claim 1 further including means for establishing the validity of said first and second elapsed time signals within a predetermined confidence level.
Claim 4
Dependent Claim
21 words
A system in accordance with claim 1, further including self-checking apparatus for verifying the operation of said programmable digital processor means.
Claim 5
Dependent Claim
25 words
A system in accordance with claim 1 further including means for determining the direction of flow of said liquid with respect to said transducer means.
Claim 6
Dependent Claim
16 words
A system in accordance with claim 1, wherein said programmable digital processor means is hard wired.
References Cited (Backward Citations)
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |