Patent US3307331A successfully refreshed from Google Patents.
US3307331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid flow control method and apparatus
Assignee: Symington Wayne Corp
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Filing: 1964-04-23
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Granted: 1967-03-07
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Expires: 1984-04-23
Abstract
No abstract record available.
Inventors
- 👤 Robert D Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:00
CPC Classifications
A; A01; A01J; A01J11/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/2931; Y10T137/3109; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7358; Y10T137/7368; Y10T137/7371
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
A METHOD OF CONTROLLING FLOW OF LIQUID FROM A LIQUIDGAS SEPARATOR HAVING A VACUUM PUMP CONNECTED TO THE UPPER PORTION OF SAID SEPARATOR FOR WITHDRAWING GAS THROUGH A VACUUM LINE AND A LIQUID PUMP CONNECTED TO THE BOTTOM OF SAID SEPARATOR FOR DISCHARGING LIQUID THROUGH A DISCHARGE LINE, COMPRISING THE STEPS OF DRAWING LIQUID INTO SAID SEPARATOR WITH SAID VACUUM PUMP, OPENING A RELATIVELY SMALL AREA OF THE LIQUID DISCHARGE LINE AND PUMPING LIQUID FROM SAID SEPARATOR AT A MINIMAL FLOW RATE WHEN SAID LIQUID LEVEL IN SAID SEPARATOR IS ABOVE A PREDETERMINED MINIMUM FLOW LEVEL, CAUSING SAID VACUUM PUMP TO OPEN A RELATIVELY LARGE AREA OF SAID LIQUID DISCHARGE LINE WHEN SAID LIQUID LEVEL IN SAID SEPARATOR IS AT A RELATIVELY HIGH PREDETERMINED OPERATING LEVEL, PUMPING LIQUID FROM SAID SEPARATOR AT A MAXIMUM FLOW RATE WHEN SAID LIQUID IS AT LEAST AS HIGH AS SAID OPERATING LEVEL, CLOSING SAID RELATIVELY LARGE AREA OF SAID LIQUID DISCHARGE LINE WHEN SAID LIQUID LEVEL DROPS BELOW SAID OPERATING LEVEL, PUMPING SAID LIQUID AT SAID MINIMAL FLOW RATE WHEN SAID LIQUID IS BELOW SAID OPERATING LEVEL BUT MORE THAN SAID MINIMUM FLOW LEVEL, AND CLOSING SAID RELATIVELY SMALL AREA OF SAID LIQUID DISCHARGE LINE WHEN SAID LIQUID DROPS TO SAID MINIMUM FLOW LEVEL.
Claim 2
Independent Claim
210 words
A METHOD OF CONTROLLING FLOW OF LIQUID FROM A LIQUIDGAS SEPARATOR HAVING A VACUUM PUMP CONNECTED TO THE UPPER PORTION OF SAID SEPARATOR FOR WITHDRAWING GAS THROUGH A VACUUM LINE AND A LIQUID PUMP CONNECTED TO THE BOTTOM OF SAID SEPARATOR FOR DISCHARGING LIQUID THROUGH A DISCHARGE LINE, COMPRISING THE STEPS OF DRAWING LIQUID INTO SAID SEPARATOR WITH SAID VACUUM PUMP, OPENING A RELATIVELY SMALL AREA OF THE LIQUID DISCHARGE LINE AND PUMPING LIQUID FROM SAID SEPARATOR AT A MINIMAL FLOW RATE WHEN SAID LIQUID LEVEL IN SAID SEPARATOR IS ABOVE A PREDETERMINED MINIMUM FLOW LEVEL, CAUSING SAID VACUUM PUMP TO OPEN A RELATIVELY LARGE AREA OF SAID LIQUID DISCHARGE LINE WHEN SAID LIQUID LEVEL IN SAID SEPARATOR IS AT A RELATIVELY HIGH PREDETERMINED OPERATING LEVEL, PUMPING LIQUID FROM SAID SEPARATOR AT A MAXIMUM FLOW RATE WHEN SAID LIQUID IS AT LEAST AS HIGH AS SAID OPERATING LEVEL, CLOSING SAID RELATIVELY LARGE AREA OF SAID LIQUID DISCHARGE LINE WHEN SAID LIQUID LEVEL DROPS BELOW SAID OPERATING LEVEL, PUMPING SAID LIQUID AT SAID MINIMAL FLOW RATE WHEN SAID LIQUID IS BELOW SAID OPERATING LEVEL BUT MORE THAN SAID MINIMUM FLOW LEVEL, AND CLOSING SAID RELATIVELY SMALL AREA OF SAID LIQUID DISCHARGE LINE WHEN SAID LIQUID DROPS TO SAID MINIMUM FLOW LEVEL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |