Patent US2747526A successfully refreshed from Google Patents.
US2747526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone furnaces
Assignee: Babcock and Wilcox Co
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Filing: 1952-07-07
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Granted: 1956-05-29
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Expires: 1972-07-07
Abstract
No abstract record available.
Inventors
- 👤 Seidl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:23
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A CYCLONE FURNACE UNIT FOR BURNING ASH-CONTAINING SOLID FUEL WHICH COMPRISES A PRIMARY CYCLONE CHAMBER OF SUBSTANTIALLY CIRCULAR CROSS-SECTION ARRANGED WITH ITS LONGITUDINAL AXIS SUBSTANTIALLY HORIZONTAL, MEANS FOR INTRODUCING A STREAM OF AIR AND ASH-CONTAINING FUEL IN SUSPENSION INTO SAID CHAMBER AND EFFECTING A HELICAL PATH OF TRAVEL THEREOF ALONG THE CIRCUMFERENTIAL WALL OF SAID CHAMBER, SAID PRIMARY CHAMBER HAVING AN OUTLET PASSAGE FOR PRODUCTS OF COMBUSTION OPENING THEREFROM IN TANGENTIAL RELATION TO SAID WALL, A SECONDARY CYCLONE CHAMBER OF SUBSTANTIALLY CIRCULAR CROSS-SECTION ARRANGED WITH ITS LONGITUDINAL AXIS SUBSTANTIALLY VERTICAL AND HAVING AN INLET PASSAGE FORMING A CONTINUATION OF SAID OUTLET PASSAGE AND ARRANGED TANGENTIALLY OF SAID SECONDARY CHAMBER FOR DEVELOPING A HELICAL GAS FLOW STREAM ALONG THE CIRCUMFERENTIAL WALL OF SAID SECONDARY CHAMBER, A SLAG DISCHARGE OPENING FROM THE LOWER PORTION OF SAID SECONDARY CHAMBER, AND GAS OUTLET FORMED AT THE UPPER END OF SAID SECONDARY CHAMBER.
Claim 2
Dependent Claim
148 words
A CYCLONE FURNACE UNIT FOR BURNING ASH-CONTAINING SOLID FUEL WHICH COMPRISES A PRIMARY CYCLONE CHAMBER OF SUBSTANTIALLY CIRCULAR CROSS-SECTION ARRANGED WITH ITS LONGITUDINAL AXIS SUBSTANTIALLY HORIZONTAL, MEANS FOR INTRODUCING A STREAM OF AIR AND ASH-CONTAINING FUEL IN SUSPENSION INTO SAID CHAMBER AND EFFECTING A HELICAL PATH OF TRAVEL THEREOF ALONG THE CIRCUMFERENTIAL WALL OF SAID CHAMBER, SAID PRIMARY CHAMBER HAVING AN OUTLET PASSAGE FOR PRODUCTS OF COMBUSTION OPENING THEREFROM IN TANGENTIAL RELATION TO SAID WALL, A SECONDARY CYCLONE CHAMBER OF SUBSTANTIALLY CIRCULAR CROSS-SECTION ARRANGED WITH ITS LONGITUDINAL AXIS SUBSTANTIALLY VERTICAL AND HAVING AN INLET PASSAGE FORMING A CONTINUATION OF SAID OUTLET PASSAGE AND ARRANGED TANGENTIALLY OF SAID SECONDARY CHAMBER FOR DEVELOPING A HELICAL GAS FLOW STREAM ALONG THE CIRCUMFERENTIAL WALL OF SAID SECONDARY CHAMBER, A SLAG DISCHARGE OPENING FROM THE LOWER PORTION OF SAID SECONDARY CHAMBER, AND GAS OUTLET FORMED AT THE UPPER END OF SAID SECONDARY CHAMBER.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |