Patent US3175541A successfully refreshed from Google Patents.
US3175541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic feedwater control system and method of operating same
Assignee: Combustion Engineering Inc
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Filing: 1963-03-25
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Granted: 1965-03-30
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Richard D Hottenstine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:43
CPC Classifications
F; F22; F22D; F22D5/00; F22B; F22B35/00; F22B35/06; F22B35/14; F22D11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
A VAPOR GENERATOR HAVING A FEEDWATER SUPPLY SYSTEM COMPRISING FEEDWATER INLET LINE; FIRST FLOW REGULATING MEANS FOR REGULATING THE FLOW OF FEEDWATER THROUGH SAID INLET LINE; FIRST FLOW METERING MEANS FOR MEASURING THE FLOW OF FEEDWATER THROUGH SAID INLET LINE AND FOR EMITTING A SIGNAL IN RESPONSE TO SAID FLOW; SECOND FLOW REGULATING MEANS, INDEPENDENT OF SAID FIRST FLOW REGULATING MEANS, HAVING ITS OUTLET CONNECTED TO SAID FEEDWATER INLET LINE DOWNSTREAM OF SAID FIRST FLOW REGULATING MEANS; SECOND FLOW METERING MEANS FOR MEASURING THE FLOW OF FEEDWATER THROUGH SAID SECOND FLOW REGULATING MEANS AND FOR EMITTING A SIGNAL IN RESPONSE TO SAID FLOW; VAPOR GENERATOR LOAD SENSING MEANS ADAPTED TO EMIT A SIGNAL IN RESPONSE TO THE LOAD DEMAND ON SAID VAPOR GENERATOR; CONTROL MEANS INCLUDING MEANS FOR ACTUATING EACH OF SAID FLOW REGULATING MEANS IN RESPONSE TO SAID LOAD DEMAND SIGNALS AND FOR REGULATING THEIR OPERATION IN RESPONSE TO THE SIGNALS EMITTED BY SAID FIRST AND SECOND FLOW METERING MEANS, AND MEANS FOR EFFECTING REGULATION OF FEEDWATER FLOW AT LOW FLOW RATES IN RESPONSE TO THE SIGNAL EMITTED BY SAID SECOND FLOW METERING MEANS AND FOR TRANSFERRING REGULATION OF FEEDWATER FLOW TO THE SIGNAL EMITTED BY SAID FIRST FLOW METERING MEANS AT HIGH FLOW RATES.
Claim 2
Dependent Claim
206 words
A VAPOR GENERATOR HAVING A FEEDWATER SUPPLY SYSTEM COMPRISING FEEDWATER INLET LINE; FIRST FLOW REGULATING MEANS FOR REGULATING THE FLOW OF FEEDWATER THROUGH SAID INLET LINE; FIRST FLOW METERING MEANS FOR MEASURING THE FLOW OF FEEDWATER THROUGH SAID INLET LINE AND FOR EMITTING A SIGNAL IN RESPONSE TO SAID FLOW; SECOND FLOW REGULATING MEANS, INDEPENDENT OF SAID FIRST FLOW REGULATING MEANS, HAVING ITS OUTLET CONNECTED TO SAID FEEDWATER INLET LINE DOWNSTREAM OF SAID FIRST FLOW REGULATING MEANS; SECOND FLOW METERING MEANS FOR MEASURING THE FLOW OF FEEDWATER THROUGH SAID SECOND FLOW REGULATING MEANS AND FOR EMITTING A SIGNAL IN RESPONSE TO SAID FLOW; VAPOR GENERATOR LOAD SENSING MEANS ADAPTED TO EMIT A SIGNAL IN RESPONSE TO THE LOAD DEMAND ON SAID VAPOR GENERATOR; CONTROL MEANS INCLUDING MEANS FOR ACTUATING EACH OF SAID FLOW REGULATING MEANS IN RESPONSE TO SAID LOAD DEMAND SIGNALS AND FOR REGULATING THEIR OPERATION IN RESPONSE TO THE SIGNALS EMITTED BY SAID FIRST AND SECOND FLOW METERING MEANS, AND MEANS FOR EFFECTING REGULATION OF FEEDWATER FLOW AT LOW FLOW RATES IN RESPONSE TO THE SIGNAL EMITTED BY SAID SECOND FLOW METERING MEANS AND FOR TRANSFERRING REGULATION OF FEEDWATER FLOW TO THE SIGNAL EMITTED BY SAID FIRST FLOW METERING MEANS AT HIGH FLOW RATES.
References Cited (Backward Citations)
GB884132A
Cited
US3096744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |