US3672808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus of continuous steam-atomizing fuel combustion for boiler furnace
Assignee: JAPAN FURNACE IND CO Ltd
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Filing: 1970-10-15
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Granted: 1972-06-27
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Expires: 1990-10-15
Abstract
Abstract A METHOD AND APPARATUS FOR INITIATING COMBUSTION IN A STEAM-ATOMIZING FURNACE USING A PRESSURIZED SOURCE OF COMBUSTION AIR TO ATOMIZE THE FUEL DURING STARTUP WHEN THE STEAM PRESSURE IS INSUFFICIENT TO DO SO. A DAMPER IS PROVIDED IN THE AIR INLET TO BUILD UP THE AIR PRESSURE UPSTREAM OF THE DAMPER SO THAT THE LATTER AIR PRESSURE MAY BE DIRECTED THROUGH THE ATOMIZING NOZZLE. WHEN THE FURNACE IS UP TO TEMPERATURE AND STEAM IS GENERATED BY THE FURNACE, THE DAMPER IS OPENED TO OBTAIN EFFICIENT COMBUSTION OF THE FUEL WHICH IS THEN ATOMIZED BY THE STEAM. A SUPPLEMENTAL AIR HEATER IS PROVIDED TO ELEVATE THE TEMPERATURE OF THE PRESSURIZED AIR DURING THE STARTUP.
Inventors
- 👤 Shuzo Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |