Patent US3229167A successfully refreshed from Google Patents.
US3229167A
Expired / Lapsed
US
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Fluid level control system
Assignee: Engineering and Development Company of Colorado
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Filing: 1963-01-14
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Granted: 1966-01-11
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Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Goble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ELECTRIC CIRCUIT FOR THE CONTROL OF AN ELECTRIC DEVICE AS A FUNCTION OF FLUID LEVEL OVER A PREDETERMINED RANGE OF FLUID LEVELS WHICH COMPRISES A PAIR OF VERTICALLY SPACED SENSING MEANS ADAPTED TO PROVIDE A RELATIVELY LOW RESISTANCE ELECTRICAL PATH WHEN IMMERSED IN A FLUID AND A RELATIVELY HIGH RESISTANCE ELECTRICAL PATH WHEN NOT SO IMMERSED, A CONTROL MEANS, CIRCUIT ESTABLISHING AND OPENING MEANS OPERABLE TO ENERGIZE THE CONTROL MEANS, SAID CIRCUIT ESTABLISHING AND OPENING MEANS BEING ENERGIZED FROM A CURRENT SOURCE THROUGH THE UPPER SENSING MEANS WHILE SAME IS IN A LOW RESISTANCE CONDITION, TO MAINTAIN THE CONTROL MEANS ENERGIZED THROGUH THE LOWER SENSING MEANS WHILE SAME IS IN A LOW RESISTANCE CONDITION AND DE-ENERGIZE THE CONTROL MEANS WHEN THE LOWER SENSING MEANS IS IN A HIGH RESISTANCE CONDITION.
Claim 2
Dependent Claim
131 words
AN ELECTRIC CIRCUIT FOR THE CONTROL OF AN ELECTRIC DEVICE AS A FUNCTION OF FLUID LEVEL OVER A PREDETERMINED RANGE OF FLUID LEVELS WHICH COMPRISES A PAIR OF VERTICALLY SPACED SENSING MEANS ADAPTED TO PROVIDE A RELATIVELY LOW RESISTANCE ELECTRICAL PATH WHEN IMMERSED IN A FLUID AND A RELATIVELY HIGH RESISTANCE ELECTRICAL PATH WHEN NOT SO IMMERSED, A CONTROL MEANS, CIRCUIT ESTABLISHING AND OPENING MEANS OPERABLE TO ENERGIZE THE CONTROL MEANS, SAID CIRCUIT ESTABLISHING AND OPENING MEANS BEING ENERGIZED FROM A CURRENT SOURCE THROUGH THE UPPER SENSING MEANS WHILE SAME IS IN A LOW RESISTANCE CONDITION, TO MAINTAIN THE CONTROL MEANS ENERGIZED THROGUH THE LOWER SENSING MEANS WHILE SAME IS IN A LOW RESISTANCE CONDITION AND DE-ENERGIZE THE CONTROL MEANS WHEN THE LOWER SENSING MEANS IS IN A HIGH RESISTANCE CONDITION.
References Cited (Backward Citations)
US2266146A
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US2266248A
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US2266249A
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US2266250A
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US2766406A
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US2769121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |