US3137144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level control and fail safe arrangement for absorption refrigeration systems
Assignee: American Gas Association Inc
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Filing: 1962-07-27
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Granted: 1964-06-16
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Expires: 1982-07-27
Abstract
No abstract record available.
Inventors
- 👤 John E Kaufman
- 👤 John E Ambrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:16
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/005; F25B15/00; F25B15/008; F25B15/02; F25B15/06; F25B2315/00; F25B2315/001; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN AN ABSORPTION REFRIGERATION SYSTEM INCLUDING AN EVAPORATOR, ABSORBER, PUMP, GENERATOR, SEPARATOR AND CONDENSER, THE IMPROVEMENT CONSISTING OF A LEVEL CONTROL AND FAIL SAFE COMPRISING A BY-PASS CONDUIT AROUND SAID PUMP, ELECTRICALLY CONTROLLABLE VALVE MEANS DISPOSED IN SAID BYPASS CONDUIT, A FLOAT IN SAID SEPARATOR ADAPTED TO FLOAT ON THE LIQUID LEVEL THEREIN, A MAGNETIC ELEMENT SECURED TO SAID FLOAT, A MAGNETIC SWITCH DISPOSED ON THE EXTERIOR OF SAID SEPARATOR ADAPTED FOR ACTUATION BY SAID MAGNETIC ELEMENT IN RESPONSE TO VARIATIONS IN THE LIQUID LEVEL IN SAID SEPARATOR, AND AN ELECTRIC CIRCUIT OPERATIVELY CONNECTING
Claim 2
Dependent Claim
94 words
IN AN ABSORPTION REFRIGERATION SYSTEM INCLUDING AN EVAPORATOR, ABSORBER, PUMP, GENERATOR, SEPARATOR AND CONDENSER, THE IMPROVEMENT CONSISTING OF A LEVEL CONTROL AND FAIL SAFE COMPRISING A BY-PASS CONDUIT AROUND SAID PUMP, ELECTRICALLY CONTROLLABLE VALVE MEANS DISPOSED IN SAID BYPASS CONDUIT, A FLOAT IN SAID SEPARATOR ADAPTED TO FLOAT ON THE LIQUID LEVEL THEREIN, A MAGNETIC ELEMENT SECURED TO SAID FLOAT, A MAGNETIC SWITCH DISPOSED ON THE EXTERIOR OF SAID SEPARATOR ADAPTED FOR ACTUATION BY SAID MAGNETIC ELEMENT IN RESPONSE TO VARIATIONS IN THE LIQUID LEVEL IN SAID SEPARATOR, AND AN ELECTRIC CIRCUIT OPERATIVELY CONNECTING
References Cited (Backward Citations)
US2446988A
Cited
US2983117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |