US3315481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for controlling refrigerant flow in a refrigeration machine
Assignee: Carrier Corp
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Filing: 1966-02-16
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Granted: 1967-04-25
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 Donald R Check
- 👤 William E Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:55
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B41/00; F25B41/30; F25B41/31; F25B41/315; F25B49/00; F25B49/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A METHOD OF CONTROLLING REFRIGERANT FLOW IN A REFRIGERATION MACHINE WHICH CONSISTS IN THE STEPS OF: REGULATING THE PASSAGE OF LIQUID REFRIGERANT FROM THE HIGH PRESSURE SIDE OF THE MACHINE TO THE LOW PRESSURE SIDE OF THE MACHINE BY A MECHANSIM OPERABLE IN RESPONSE TO THE LEVEL OF LIQUID REFRIGERANT COLLECTED IN THE HIGH PRESSURE SIDE OF THE MACHINE, AND OVERRIDING THE ACTION OF SAID MECHANISM AT A PREDETERMINED LOAD ON THE MACHINE SO THAT A MIXTURE OF GASEOUS AND LIQUID REFRIGERANT FROM THE HIGH PRESSURE SIDE MAY PASS TO THE LOW PRESSURE SIDE UNIMPEDED BY THE ACTION OF THE MECHANISM.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |