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Patent US3243969A successfully refreshed from Google Patents.
US3243969A
Expired / Lapsed
US
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Arrangement and method for charging refrigerant into a capillary-controlled refrigeration system
Assignee: Lennox Industries Inc
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Filing: 1964-01-27
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Granted: 1966-04-05
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Expires: 1984-01-27
Abstract
No abstract record available.
Inventors
- 👤 William R Dirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:04
CPC Classifications
F; F25; F25B; F25B45/00; F25B2345/00; F25B2345/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF DETERMINING THE CHARGE OF REFRIGERANT IN A CAPILLARY-CONTROLLED REFRIGERATION SYSTEM INCLUDING A COMPRESSOR, AN AIR-COOLED CONDENSER, A CAPILLARY TUBE AND AN EVAPORATOR, COMPRISING THE STEPS OF RESTRICTING THE PASSAGE OF AIR OVER THE CONDENSER, BLOCKING THE LIQUID LINE INTERCONNECTING THE CONDENSER AND THE CAPILLARY TUBE WHILE OPERATING THE COMPRESSOR UNTIL A PREDETERMINED REFRIGERANT PRESSURE IS OBTAINED, OPENING A VALVE POSITIONED AT A PREDETERMINED LEVEL ON THE CONDENSER TO ASCERTAIN WHETHER GAS OR LIQUID REFRIGERANT IS PRESENT AT SUCH LEVEL AND OPENING A VALVE POSITIONED AT A HIGHER LEVEL ON THE CONDENSER THAN SAID FIRST VALVE TO ASCERTAIN WHETHER GAS OR LIQUID IS PRESENT AT SAID HIGHER LEVEL, SAID REFRIGERANT SYSTEM BEING PROPERLY CHARGED WHEN LIQUID REFRIGERANT IS PRESENT AT SAID PREDETERMINED LEVEL AND GAS IS PRESENT AT SAID HIGHER LEVEL.
Claim 2
Independent Claim
133 words
A METHOD OF DETERMINING THE CHARGE OF REFRIGERANT IN A CAPILLARY-CONTROLLED REFRIGERATION SYSTEM INCLUDING A COMPRESSOR, AN AIR-COOLED CONDENSER, A CAPILLARY TUBE AND AN EVAPORATOR, COMPRISING THE STEPS OF RESTRICTING THE PASSAGE OF AIR OVER THE CONDENSER, BLOCKING THE LIQUID LINE INTERCONNECTING THE CONDENSER AND THE CAPILLARY TUBE WHILE OPERATING THE COMPRESSOR UNTIL A PREDETERMINED REFRIGERANT PRESSURE IS OBTAINED, OPENING A VALVE POSITIONED AT A PREDETERMINED LEVEL ON THE CONDENSER TO ASCERTAIN WHETHER GAS OR LIQUID REFRIGERANT IS PRESENT AT SUCH LEVEL AND OPENING A VALVE POSITIONED AT A HIGHER LEVEL ON THE CONDENSER THAN SAID FIRST VALVE TO ASCERTAIN WHETHER GAS OR LIQUID IS PRESENT AT SAID HIGHER LEVEL, SAID REFRIGERANT SYSTEM BEING PROPERLY CHARGED WHEN LIQUID REFRIGERANT IS PRESENT AT SAID PREDETERMINED LEVEL AND GAS IS PRESENT AT SAID HIGHER LEVEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |