US3114381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control apparatus for controlling independently of gravity and density
Assignee: Wallace O Leonard Inc
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Filing: 1960-09-19
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Granted: 1963-12-17
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Klose
- 👤 Richard V Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; F; F17; F17C; F17C13/00; F17C13/02; F17C13/021; G01; G01F; G01F23/00; G01F23/14; G01F23/18; F17C2205/00; F17C2205/01; F17C2205/0123; F17C2205/013; F17C2205/0134; F17C2205/0146; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2223/04; F17C2223/042; F17C2223/046; F17C2223/047; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0421; F17C2250/043; F17C2250/0434; F17C2250/06; F17C2250/0605; F17C2250/0636; F17C2260/00; F17C2260/02; F17C2260/024; F17C2265/00; F17C2265/02; F17C2265/025; F17C2270/00; F17C2270/01; F17C2270/0186; F17C2270/0197; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
APPARATUS FOR CONTROLLING THE RATIO OF THE QUANTITIES OF TWO LIQUIDS PRESENT IN A SYSTEM, THE APPARATUS COMPRISING A FIRST TANK ADAPTED TO HOLD A FIRST LIQUID, MEANS FOR DISCHARGING LIQUID FROM THE FIRST TANK, A SECOND TANK ADAPTED TO HOLD A SECOND LIQUID, MEANS FOR DISCHARGING LIQUID FROM THE SECOND TANK, MEANS FOR REGULATING THE RATE AT WHICH LIQUID DISCHARGES FROM ONE OF THE TANKS, MEANS FOR SENSING THE DIFFERENCE IN PRESSURES OF ONE OF THE LIQUIDS ACTING AT A FIRST PAIR OF PREDETERMINED POINTS OF MEASUREMENT WITHIN THE SAID ONE LIQUID, MEANS FOR SENSING THE DIFFERENCE IN PRESSURES BETWEEN A POINT ABOVE THE SURFACE OF THE SAID ONE LIQUID AND OF THE SAID ONE LIQUID ACTING AT A PREDETERMINED POINT OF MEASUREMENT WITHIN THE SAID ONE LIQUID, MEANS FOR DEVELOPING A COMMAND SIGNAL IN RESPONSE TO THE RATIO OF THE TWO SAID DIFFERENCES IN PRESSURES, MEANS FOR SENSING THE RATIO OF THE LIQUID HEADS IN THE TWO TANKS, MEANS FOR DEVELOPING AN ERROR SIGNAL IN RESPONSE TO THE COMMAND SIGNAL AND THE RATIO OF THE TWO LIQUID HEADS, AND MEANS RESPONSIVE TO THE ERROR SIGNAL FOR ADJUSTING THE REGULATING MEANS TO CONTROL LIQUID DISCHARGED FROM THE SAID ONE TANK.
Claim 2
Dependent Claim
201 words
APPARATUS FOR CONTROLLING THE RATIO OF THE QUANTITIES OF TWO LIQUIDS PRESENT IN A SYSTEM, THE APPARATUS COMPRISING A FIRST TANK ADAPTED TO HOLD A FIRST LIQUID, MEANS FOR DISCHARGING LIQUID FROM THE FIRST TANK, A SECOND TANK ADAPTED TO HOLD A SECOND LIQUID, MEANS FOR DISCHARGING LIQUID FROM THE SECOND TANK, MEANS FOR REGULATING THE RATE AT WHICH LIQUID DISCHARGES FROM ONE OF THE TANKS, MEANS FOR SENSING THE DIFFERENCE IN PRESSURES OF ONE OF THE LIQUIDS ACTING AT A FIRST PAIR OF PREDETERMINED POINTS OF MEASUREMENT WITHIN THE SAID ONE LIQUID, MEANS FOR SENSING THE DIFFERENCE IN PRESSURES BETWEEN A POINT ABOVE THE SURFACE OF THE SAID ONE LIQUID AND OF THE SAID ONE LIQUID ACTING AT A PREDETERMINED POINT OF MEASUREMENT WITHIN THE SAID ONE LIQUID, MEANS FOR DEVELOPING A COMMAND SIGNAL IN RESPONSE TO THE RATIO OF THE TWO SAID DIFFERENCES IN PRESSURES, MEANS FOR SENSING THE RATIO OF THE LIQUID HEADS IN THE TWO TANKS, MEANS FOR DEVELOPING AN ERROR SIGNAL IN RESPONSE TO THE COMMAND SIGNAL AND THE RATIO OF THE TWO LIQUID HEADS, AND MEANS RESPONSIVE TO THE ERROR SIGNAL FOR ADJUSTING THE REGULATING MEANS TO CONTROL LIQUID DISCHARGED FROM THE SAID ONE TANK.
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) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |