Patent US3097502A successfully refreshed from Google Patents.
US3097502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrost control apparatus
Assignee: —
•
Filing: —
•
Granted: 1963-07-16
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Expires: 1980-07-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:39
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25B47/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
165 words
IN A DEFROST CONTROL SYSTEM FOR A REFRIGERATION SYSTEM HAVING A COMPRESSOR, AN INDOOR HEAT EXCHANGER NORMALLY FURNISHING HEAT TO A SPACE AND AN OUTDOOR AIR HEAT EXCHANGER CONNECTED IN A REFRIGERANT FILLED SERIES SYSTEM WITH DEFROSTING APPARATUS FOR HEATING THE OUTDOOR HEAT EXCHANGER WHEN FROST FORMS THEREON, FIRST RESPONSIVE MEANS HAVING AN OUTPUT INDICATIVE OF THE TEMPERATURE OF THE NORMALLY COLDEST PORTION OF SAID OUTDOOR COIL, SECOND RESPONSIVE MEANS HAVING AN OUTPUT INDICATIVE OF THE TEMPERATURE OF THE NORMALLY WARMEST PORTION OF THE OUTDOOR COIL, THIRD RESPONSIVE MEANS HAVING AN OUTPUT INDICATIVE OF THE TEMPERATURE OF THE AIR ENTERING THE OUTDOOR HEAT EXCHANGER, MEANS RESPONSIVE TO A PREDETERMINED DIFFERENCE IN THE OUTPUT OF SAID SECOND RESPONSIVE MEANS AND SAID THIRD RESPONSIVE MEANS FOR STARTING THE OPERATION OF THE DEFROSTING APPARATUS BY REVERSING REFRIGRANT FLOW TO SAID COILS TO REMOVE FROST FROM THE OUTDOOR HEAT EXCHANGER, AND MEANS RESPONSIVE TO THE OUTPUT OF SAID FIRST RESPONSIVE MEANS FOR TERMINATING THE OPERATING OF THE DEFROSTING APPARATUS.
References Cited (Backward Citations)
US2666298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |