US3758258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A method for combusting fuels in a substantially conically shaped curtain
Assignee: COLLIN CONSULT AB
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Filing: 1971-03-23
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Granted: 1973-09-11
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Expires: 1991-03-23
Abstract
Abstract A device and method for improving the combustion of fuels which emerge from the orifice of a burner nozzle in the form of a conically shaped fuel curtain, around which and coaxial with is a connecting envelope of combustion air. Extending coaxially with the main burner tube are further tubes which form air passages. The further tubes are provided at the ends thereof adjacent the fuel nozzle with air nozzle means which give the air a determined direction of flow relative to the radial plane, thereby creating a subpressure externally of the fuel and air cones, whereupon the cones are drawn rearwardly and outwardly with respect to the burner nozzle tip.
Inventors
- 👤 M Kolhi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A method of combusting fuel comprises forcing said fuel through an orifice adapted to produce a conically shaped fuel curtain; forcing combustion air through a substantially annular flow-through area located coaxially with said orifice, directing said combustion air away from the axis of the fuel cone to form a substantially conical or bowl shaped curtain concentric with and exterior to said fuel cone; maintaining the pressure used to force said combustion air at a sufficiently high level to create a sub-atmospheric pressure zone between said combustion air curtain and said fuel cone whereby said fuel cone angle is increased and said fuel is admixed with said combustion air in a combustion zone; igniting said admixture and mainting said combustion zone during combustion.
Claim 2
Independent Claim
122 words
A method of combusting fuel comprises forcing said fuel through an orifice adapted to produce a conically shaped fuel curtain; forcing combustion air through a substantially annular flow-through area located coaxially with said orifice, directing said combustion air away from the axis of the fuel cone to form a substantially conical or bowl shaped curtain concentric with and exterior to said fuel cone; maintaining the pressure used to force said combustion air at a sufficiently high level to create a sub-atmospheric pressure zone between said combustion air curtain and said fuel cone whereby said fuel cone angle is increased and said fuel is admixed with said combustion air in a combustion zone; igniting said admixture and mainting said combustion zone during combustion.
Claim 3
Dependent Claim
22 words
A method according to claim 1 including continuously withdrawing the atmosphere by suction to influence the pressure conditions at the air curtain.
Claim 4
Dependent Claim
34 words
A method according to claim 1 including causing the atmosphere adjacent the air curtain to move in a substantially toroidal shaped pattern of eddy current to influene the pressure conditions at the air curtain.
Claim 5
Dependent Claim
30 words
A method according to claim 3, wherein said atmosphere is activated by means of a positively propelled and directed gas flow to produce said toroidal shaped pattern of eddy currents.
Claim 6
Dependent Claim
26 words
A method according to claim 2, wherein said pressure condition is maintained by the combination of suction and positive propulsion and direction of a gas flow.
Claim 7
Dependent Claim
37 words
A method according to claim 2, in which the flow of gas is directed at an angle of between +10* and -60* to the radial plane of the axis and in a direction away from said axis.
Claim 8
Dependent Claim
37 words
A method according to claim 2, in which the flow of gas is directed at an angle of between +5* to -30* to the radial plane of the axis and in a direction away from said axis.
Claim 9
Dependent Claim
35 words
A method according to claim 2, in which the flow of gas is directed at an angle of approximately -20* to the radial plane of the axis and in a direction away from said axis.
Claim 10
Dependent Claim
23 words
A method according to claim 8, wherein said gas flow is also directed at an angle to the radius of the radial plane.
Claim 11
Dependent Claim
25 words
A method according to claim 21, wherein said combustion zone is held withdrawn rearwardly beyond the fuel orifice by maintaining sub-atmospheric condition behind said orifice.
References Cited (Backward Citations)
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US2986206A
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US3030773A
Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |