Patent US2731955A successfully refreshed from Google Patents.
US2731955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverized coal furnace
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:28
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008; F23M; F23M9/00; F23M9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A COMBUSTION APPRATUS FOR PULVERIZED FUEL COMPRISING A SUBSTANTIALLY CYLINDRICAL COMBUSTION CHAMBER HAVING A CYCLONE BURNER FIRED FIRST POSITION, SAID FIRST PORTION HAVING A CIRCUMFERENTIAL WALL AND SECONDARY AIR ADMISSION MEANS EQUALLY DISTRIBUTED ALL AROUND AND OVER THE WHOLE LENGTH OF SAID WALL FOR COOLING SAID FIRST PORTION EXCLUSIVELY BY SECONDARY COMBUSTION AIR, THE LONGITUDINAL AXIS OF SAID COMBUSTION CHAMBER BEING SUBSTANTIALLY HORIZONTAL AND DECLINING SOMEWHAT IN THE GENERAL DIRECTION OF THE FLOW OF THE COMBUSTION GASES, SAID COMBUSTION CHAMBER HAVING A SECOND PORTION HAVING A WATER-COOLED CIRCUMFERENTIAL WALL, AND GUIDE MEANS FOR THE BURNING GASES DISPOSED IN SAID COMBUSTION CHAMBER BETWEEN SAID FIRST AND SAID SECOND PORTION, SAID SECOND PORTION HAVING A REAR WALL AND OPENINGS IN SAID REAR WALL OFFORDING PASSAGE OF THE HOT COMBUSTION GAS TO ITS PLACE OF USE AND FLOW OF SLAG OUT OF SAID SECOND PORTION.
Claim 2
Dependent Claim
142 words
A COMBUSTION APPRATUS FOR PULVERIZED FUEL COMPRISING A SUBSTANTIALLY CYLINDRICAL COMBUSTION CHAMBER HAVING A CYCLONE BURNER FIRED FIRST POSITION, SAID FIRST PORTION HAVING A CIRCUMFERENTIAL WALL AND SECONDARY AIR ADMISSION MEANS EQUALLY DISTRIBUTED ALL AROUND AND OVER THE WHOLE LENGTH OF SAID WALL FOR COOLING SAID FIRST PORTION EXCLUSIVELY BY SECONDARY COMBUSTION AIR, THE LONGITUDINAL AXIS OF SAID COMBUSTION CHAMBER BEING SUBSTANTIALLY HORIZONTAL AND DECLINING SOMEWHAT IN THE GENERAL DIRECTION OF THE FLOW OF THE COMBUSTION GASES, SAID COMBUSTION CHAMBER HAVING A SECOND PORTION HAVING A WATER-COOLED CIRCUMFERENTIAL WALL, AND GUIDE MEANS FOR THE BURNING GASES DISPOSED IN SAID COMBUSTION CHAMBER BETWEEN SAID FIRST AND SAID SECOND PORTION, SAID SECOND PORTION HAVING A REAR WALL AND OPENINGS IN SAID REAR WALL OFFORDING PASSAGE OF THE HOT COMBUSTION GAS TO ITS PLACE OF USE AND FLOW OF SLAG OUT OF SAID SECOND PORTION.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |