US3315482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant flow control for maintaining minimum head
Assignee: Carrier Corp
•
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
- 👤 Howard W Kirtland
- 👤 Donald R Check
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:52
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B41/00; F25B41/30; F25B41/31; F25B41/315
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
THE METHOD OF CONTROLLING REFRIGERANT FLOW IN A REFRIGERATION MACHINE WHICH CONSISTS IN THE STEPS OF REGULATING A PASSAGE OF LIQUID REFRIGERANT FROM THE HIGH PRESSURE SIDE OF THE MACHINE TO THE LOW PRESSURE SIDE OF THE MACHINE BY MECHANISM 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 WHEN THE PRESSURE DIFFERENTIAL BETWEEN THE HIGH PRESSURE AND LOW PRESSURE SIDES OF THE MACHINE IS BELOW A DESIRED MINIMUM TO HOLD SAID MECHANISM CLOSED UNTIL THE DESIRED MINIMUM PRESSURE DIFFERENTIAL IS ATTAINED.
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 |