Patent US3150644A successfully refreshed from Google Patents.
US3150644A
Expired / Lapsed
US
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Steam generating unit
Assignee: Riley Power Inc
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Filing: 1962-04-19
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Granted: 1964-09-29
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Robert K Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:28
CPC Classifications
F; F22; F22G; F22G5/00; F22G5/06; F22B; F22B31/00; F23; F23B; F23B7/00; F23B2700/00; F23B2700/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A STEAM GENERATING UNIT, COMPRISING (A) A COMBUSTION CHAMBER HAVING AN UPPER AND A LOWER END, (B) FUEL-BURNING MEANS ASSOCIATED WITH THE LOWER END OF THE CHAMBER FOR PRODUCING HOT GASEOUS PRODUCTS OF COMBUSTION, (C) A BOILER ASSOCIATED WITH THE CHAMBER INCLUDING A SUPERHEATER MOUNTED ADJACENT THE UPPER END OF THE CHAMBER, THE BOILER HAVING CONVECTION HEAT EXCHANGE ELEMENTS OVER WHICH PASS THE PRODUCTS OF COMBUSTION AFTER THEY HAVE PASSED THROUGH THE CHAMBER, (D) A RETURN DUCT CONNECTED AT ONE END TO OPENINGS INTO THE COMBUSTION CHAMBER, (E) GAS RE-CIRCULATION MEANS CONNECTED TO THE OTHER END OF THE DUCT TO INTRODUCE THERETO PRODUCTS OF COMBUSTION THAT HAVE PASSED OVER THE SAID HEAT EXCHANGE ELEMENTS OF THE BOILER, (F) FLYASH RETURN MEANS CONNECTED TO THE OTHER END OF THE DUCT TO INTRODUCE THERETO FLYASH THAT HAS ACCUMULATED IN THE BOILER, AND (G) CONTROL MEANS ASSOCIATED WITH THE GAS RECIRCULATION MEANS AND THE FLYASH RETURN MEANS INTRODUCING RELATIVELY LARGE AMOUNTS OF PRODUCTS OF COMBUSTION INTO THE DUCT AT LOW LOAD AND RELATIVELY LARGE AMOUNTS OF FLYASH INTO THE DUCT AT HIGH LOAD.
Claim 2
Dependent Claim
180 words
A STEAM GENERATING UNIT, COMPRISING (A) A COMBUSTION CHAMBER HAVING AN UPPER AND A LOWER END, (B) FUEL-BURNING MEANS ASSOCIATED WITH THE LOWER END OF THE CHAMBER FOR PRODUCING HOT GASEOUS PRODUCTS OF COMBUSTION, (C) A BOILER ASSOCIATED WITH THE CHAMBER INCLUDING A SUPERHEATER MOUNTED ADJACENT THE UPPER END OF THE CHAMBER, THE BOILER HAVING CONVECTION HEAT EXCHANGE ELEMENTS OVER WHICH PASS THE PRODUCTS OF COMBUSTION AFTER THEY HAVE PASSED THROUGH THE CHAMBER, (D) A RETURN DUCT CONNECTED AT ONE END TO OPENINGS INTO THE COMBUSTION CHAMBER, (E) GAS RE-CIRCULATION MEANS CONNECTED TO THE OTHER END OF THE DUCT TO INTRODUCE THERETO PRODUCTS OF COMBUSTION THAT HAVE PASSED OVER THE SAID HEAT EXCHANGE ELEMENTS OF THE BOILER, (F) FLYASH RETURN MEANS CONNECTED TO THE OTHER END OF THE DUCT TO INTRODUCE THERETO FLYASH THAT HAS ACCUMULATED IN THE BOILER, AND (G) CONTROL MEANS ASSOCIATED WITH THE GAS RECIRCULATION MEANS AND THE FLYASH RETURN MEANS INTRODUCING RELATIVELY LARGE AMOUNTS OF PRODUCTS OF COMBUSTION INTO THE DUCT AT LOW LOAD AND RELATIVELY LARGE AMOUNTS OF FLYASH INTO THE DUCT AT HIGH LOAD.
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |