Patent US3869244A successfully refreshed from Google Patents.
US3869244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner unit
Assignee: SAID ROBERT VON LINDE BY SAID
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Filing: 1974-01-14
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Granted: 1975-03-04
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Expires: 1994-01-14
Abstract
Abstract A burner unit for fluid fuels and also for pulverized coal comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chambers means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into the drawn-in combustion gases, and means for supplying oxygen-containing gas, f.i. air, to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle to increase the suction effect of the oxygen-containing gas on the combustion gases drawn into said prechamber means.
Inventors
- 👤 Linde Robert Von
- 👤 Linde Joachim Von
- 👤 German Kurz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
F; F23; F23C; F23C9/00; F23C9/006; F23C7/00; F23C7/02; F23C7/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A burner unit comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chamber means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into said recirculated combustion gases, and means for supplying oxygencontaining gas to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle, said means for supplying oxygen-containing gas comprises pipes extending into the prechamber and arranged symmetrically about the fuel supply nozzle, the interstices between adjacent pipes forming passageways for the recirculated combustion gases into the space of the prechamber surrounding the fuel supply nozzle.
Claim 2
Dependent Claim
139 words
A burner unit comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chamber means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into said recirculated combustion gases, and means for supplying oxygencontaining gas to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle, said means for supplying oxygen-containing gas comprises pipes extending into the prechamber and arranged symmetrically about the fuel supply nozzle, the interstices between adjacent pipes forming passageways for the recirculated combustion gases into the space of the prechamber surrounding the fuel supply nozzle.
Claim 3
Dependent Claim
22 words
A burner unit according to claim 1, wherein said pipes are substantially parallel to the longitudinal axis of the fuel supply nozzle.
Claim 4
Dependent Claim
32 words
A burner unit according to claim 1, wherein said pipes are inclined towards the longitudinal axis of the fuel supply nozzle with an angle up to 15*, preferably between 5* and 10*.
Claim 5
Dependent Claim
121 words
A burner unit comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chamber means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into said recirculated combustion gases, and means for supplying oxygen-containing gas to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle, at least two groups of exit openings being provided with each group being connected or disconnected separately to or from a combustion air supply source.
Claim 6
Dependent Claim
121 words
A burner unit comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chamber means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into said recirculated combustion gases, and means for supplying oxygen-containing gas to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle, at least two groups of exit openings being provided with each group being connected or disconnected separately to or from a combustion air supply source.
Claim 7
Dependent Claim
128 words
A burner unit comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chamber means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into said recirculated combustion gases, and means for supplying oxygen-containing gas to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle, the exit openings being arranged in the inner surface of the mixing pipe and being connected to a source of oxygen-containing gas via annular spaces in the wall of the mixing pipe.
Claim 8
Dependent Claim
128 words
A burner unit comprising combustion chamber means, prechamber means, means to enable combustion gases to pass from said combustion chamber means into said prechamber means, mixing pipe means in communication with said prechamber means and said combustion chamber means, a fuel supply nozzle for distributing finely divided fuel towards said mixing pipe means into said recirculated combustion gases, and means for supplying oxygen-containing gas to the mixture of fuel and combustion gases, wherein said means for supplying oxygen-containing gas comprises a plurality of exit openings arranged symmetrically about the longitudinal axis of said fuel supply nozzle, the exit openings being arranged in the inner surface of the mixing pipe and being connected to a source of oxygen-containing gas via annular spaces in the wall of the mixing pipe.
Claim 9
Dependent Claim
30 words
A burner unit according to claim 5, wherein two groups of exit openings are provided with each group being individually connectable to or disconnectable from a source of oxygen-containing gas.
Claim 10
Dependent Claim
45 words
A burner unit according to claim 6, wherein the exit openings of the one group have a bigger cross-section than the exit openings of the other group with one exit opening of one group being located between two adjacent exit openings of the other group.
References Cited (Backward Citations)
US2918117A
Cited
US3741166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |