US3092086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed-water control for forcedcirculation boilers
Assignee: Sulzer AG
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Filing: 1959-07-15
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Granted: 1963-06-04
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Expires: 1979-07-15
Abstract
No abstract record available.
Inventors
- 👤 Profos Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:00
CPC Classifications
F; F22; F22B; F22B29/00; F22B29/06; F22B29/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A ONCE-THROUGH FORCED CIRCULATION BOILER INCLUDING A FEED PUMP, A FEED-WATER SUPPLY CONTROL VALVE, AN EVAPORATOR, AND A WATER SEPARATOR, MEANS TO CONTROL THE RATE OF SUPPLY OF FEED-WATER COMPRISING MEANS TO DEVELOP A FIRST SIGNAL REPRESENTATIVE OF STEAM TEMPERATURE IN THE EVAPORATOR, A VALVE CONTROLLING WITHDRAWAL OF WATER FROM SAID SEPARATOR, MEANS TO DEVELOP A SECOND SIGNAL REPRESENTATIVE OF THE POSITION OF SAID LAST-NAMED VALVE AND INDICATIVE OF THE RATE OF WATER EXTRACTION THROUGH SAID LAST-NAMED VALVE, MEANS TO DEVELOP A THIRD SIGNAL REPRESENTATIVE OF THE RATE OF FLOW OF STEAM OUT OF SAID SEPARATOR, MEANS TO DEVELOP FROM SAID SECOND AND THIRD SIGNALS A FOURTH SIGNAL REPRESENTATIVE OF THE RATIO OF WATER EXTRACTED TO STEAM DELIVERED FROM SAID SEPARATOR, AND MEANS TO CONTROL THE OPENING OF SAID FIRST-NAMED VALVE IN RESPONSE TO THE DIFFERENCE BETWEEN SAID FIRST AND FOURTH SIGNALS.
Claim 2
Dependent Claim
143 words
IN A ONCE-THROUGH FORCED CIRCULATION BOILER INCLUDING A FEED PUMP, A FEED-WATER SUPPLY CONTROL VALVE, AN EVAPORATOR, AND A WATER SEPARATOR, MEANS TO CONTROL THE RATE OF SUPPLY OF FEED-WATER COMPRISING MEANS TO DEVELOP A FIRST SIGNAL REPRESENTATIVE OF STEAM TEMPERATURE IN THE EVAPORATOR, A VALVE CONTROLLING WITHDRAWAL OF WATER FROM SAID SEPARATOR, MEANS TO DEVELOP A SECOND SIGNAL REPRESENTATIVE OF THE POSITION OF SAID LAST-NAMED VALVE AND INDICATIVE OF THE RATE OF WATER EXTRACTION THROUGH SAID LAST-NAMED VALVE, MEANS TO DEVELOP A THIRD SIGNAL REPRESENTATIVE OF THE RATE OF FLOW OF STEAM OUT OF SAID SEPARATOR, MEANS TO DEVELOP FROM SAID SECOND AND THIRD SIGNALS A FOURTH SIGNAL REPRESENTATIVE OF THE RATIO OF WATER EXTRACTED TO STEAM DELIVERED FROM SAID SEPARATOR, AND MEANS TO CONTROL THE OPENING OF SAID FIRST-NAMED VALVE IN RESPONSE TO THE DIFFERENCE BETWEEN SAID FIRST AND FOURTH SIGNALS.
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |