Patent US3299841A successfully refreshed from Google Patents.
US3299841A
Expired / Lapsed
US
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Burner impeller
Assignee: Babcock and Wilcox Co
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Filing: 1965-10-13
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Granted: 1967-01-24
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Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Fritz L Hemker
- 👤 John R Mcwhorter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:54
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23D; F23D1/00; F23D1/02; F23L; F23L17/00; F23M; F23M11/00; F23M11/04; F23M11/045; F23D2208/00; F23D2208/10; F23L2700/00; F23L2700/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
IN COMBINATION: A FUEL BURNER INCLUDING A BURNER NOZZLE; MEANS FOR SUPPLYING PULVERIZED COAL AND COMBUSTION AIR TO SAID BURNER; AN IMPELLER PIPE CONCENTRICALLY MOUNTED WITHIN SAID BURNER NOZZLE; A FLAME SENSING DEVICE INCLUDING A DETECTOR TUBE DISPOSED WITHIN SAID PIPE AND AIMED AT THE BURNER END OF SAID IMPELLER PIPE; AND AN IMPELLER ATTACHED TO THE BURNER END OF SAID PIPE, SAID IMPELLER HAVING A SERIES OF STATIONARY AXIALLY SPACED ANNULAR VANES OF PROGRESSIVELY DECREASING DIAMETERS, THE INNERMOST VANE HAVING A PLURALITY OF OPENINGS FOR PASSING UNDEFLECTED A SMALL AMOUNT OF FUEL FOR COMBUSTION IN SAID BURNER, SAID DETECTOR TUBE SENSITIVE TO THE RADIATION EMITTED BY THE BURNING OF SAID UNDEFLECTED AMOUNT OF COAL.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |