US3726634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner
Assignee: Individual
•
Filing: 1970-09-30
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Granted: 1973-04-10
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Expires: 1990-09-30
Abstract
Abstract A burner construction for burning gaseous fuel with a gaseous oxidizer. The fuel and oxidizer are mixed and directed so as to impart a swirling motion to the resultant mixture. The swirling mixture is passed through an annulus formed by a flame holder and the inside surface of a flame tube and ignited in a combustion chamber. The construction provides improved combustion intensity and permits the use of pure oxygen as the oxidizer without overheating or melting the combustion chamber walls.
Inventors
- 👤 J Thomson
- 👤 D Zagoroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/32; F23D14/34
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
236 words
In a burner for gaseous fuel comprising a combustion chamber defined by a flame holder and a hollow tube surrounding and extending downstream of said flame holder, and means for delivering a mixture of gaseous fuel and oxidizer to an entry to said chamber, said entry being formed by an annulus between said tube and said flame holder, the improvement enabling burning of gaseous fuel mixed with oxygen while the gas in the combustion chamber keeps the wall of the chamber cool relative to the high intensity combustion occurring therein, said improvement comprising swirling means spaced upstream of said entry and capable of imparting a general swirl to gaseous fuel and oxygen in the direction about the axis of flow, an exit passage extending from said swirling means to said entry, said flame holder at said entry being supported at the end of a support member comprising a shaft reduced in cross sectional area from said flame holder and which extends upstream from said flame holder along said passage, said support member having a peripheral surface constructed to permit undisturbed flow of said swirling gas to said entry, and said exit passage being otherwise circumferentially unobstructed whereby an uninterrupted ring of swirling gas can uniformly reach said entry, and said entry being of unobstructed, form, constructed to admit said ring and maintain its uninterrupted, swirling and uniform character downstream thereof adjacent the wall of the tube.
Claim 2
Dependent Claim
236 words
In a burner for gaseous fuel comprising a combustion chamber defined by a flame holder and a hollow tube surrounding and extending downstream of said flame holder, and means for delivering a mixture of gaseous fuel and oxidizer to an entry to said chamber, said entry being formed by an annulus between said tube and said flame holder, the improvement enabling burning of gaseous fuel mixed with oxygen while the gas in the combustion chamber keeps the wall of the chamber cool relative to the high intensity combustion occurring therein, said improvement comprising swirling means spaced upstream of said entry and capable of imparting a general swirl to gaseous fuel and oxygen in the direction about the axis of flow, an exit passage extending from said swirling means to said entry, said flame holder at said entry being supported at the end of a support member comprising a shaft reduced in cross sectional area from said flame holder and which extends upstream from said flame holder along said passage, said support member having a peripheral surface constructed to permit undisturbed flow of said swirling gas to said entry, and said exit passage being otherwise circumferentially unobstructed whereby an uninterrupted ring of swirling gas can uniformly reach said entry, and said entry being of unobstructed, form, constructed to admit said ring and maintain its uninterrupted, swirling and uniform character downstream thereof adjacent the wall of the tube.
Claim 3
Dependent Claim
25 words
The burner of claim 1 wherein said swirling means comprises means defining a helical gas path coaxial with and discharging toward said passage and entry.
Claim 4
Dependent Claim
207 words
In a burner for gaseous fuel comprising a combustion chamber defined by a flame holder and a hollow tube surrounding and extending downstream of said flame holder, and means for delivering a mixture of gaseous fuel and oxidizer to an entry to said chamber, said entry being formed by an annulus betweeN said tube and said flame holder, the improvement enabling burning of gaseous fuel mixed with oxygen while the gas in the combustion chamber keeps the wall of the chamber cool relative to the high intensity combustion occurring therein, said improvement comprising swirling means spaced upstream of said entry and capable of imparting a general swirl to gaseous fuel and oxygen in the direction about the axis of flow, said swirling means comprising a circular chamber concentric with said entry and at least one tangential inlet to said circular chamber admitting gas in a swirling flow about the axis of said chamber, a circumferentially unobstructed exit passage extending from said swirling means to said entry for causing an uninterrupted ring of swirling gas to uniformly reach said entry, and said entry being of unobstructed form, constructed to admit said ring and maintain its uninterrupted, swirling and uniform character downstream thereof adjacent the wall of the tube.
Claim 5
Dependent Claim
207 words
In a burner for gaseous fuel comprising a combustion chamber defined by a flame holder and a hollow tube surrounding and extending downstream of said flame holder, and means for delivering a mixture of gaseous fuel and oxidizer to an entry to said chamber, said entry being formed by an annulus betweeN said tube and said flame holder, the improvement enabling burning of gaseous fuel mixed with oxygen while the gas in the combustion chamber keeps the wall of the chamber cool relative to the high intensity combustion occurring therein, said improvement comprising swirling means spaced upstream of said entry and capable of imparting a general swirl to gaseous fuel and oxygen in the direction about the axis of flow, said swirling means comprising a circular chamber concentric with said entry and at least one tangential inlet to said circular chamber admitting gas in a swirling flow about the axis of said chamber, a circumferentially unobstructed exit passage extending from said swirling means to said entry for causing an uninterrupted ring of swirling gas to uniformly reach said entry, and said entry being of unobstructed form, constructed to admit said ring and maintain its uninterrupted, swirling and uniform character downstream thereof adjacent the wall of the tube.
Claim 6
Dependent Claim
32 words
The burner construction of claim 2 wherein said swirling means to impart swirling motion to the gases comprises passages formed by grooves on a shaft and a tubular member surrounding said shaft.
Claim 7
Dependent Claim
38 words
The burner construction of claim 3 wherein said swirling means to impart swirling motion to the gases comprises a cylindrical mixing and swirl chamber and means for separately introducing the gases tangentially into said mixing and swirl chamber.
Claim 8
Dependent Claim
29 words
The burner construction of claim 3 wherein the gases are passed downwardly from said inlet through said swirl chamber and then upwardly through the annular entry and combustion chamber.
Claim 9
Dependent Claim
205 words
Burner for gaseous fuel, the burner capable of use with oxygen to produce high intensity heat comprising the combination in a burner head of a plurality of combustion chambers each having an annular entry for mixture of gaseous fuel and oxidizer and an exit for hot gases, said annular entry defined by a central flame holder member and a surrounding wall defining a passage, said passage communicating with a swirl chamber spaced apart upstream of said flame holder, means associated with said swirl chamber to effectively impart swirling motion to a gaseous mixture of fuel and oxidizer, with said swirl substantially coaxial with said annulus, said passage shaped to conduct said swirling mixture to said annular entry and said annular entry shaped to introduce a swirling annular ring of said gaseous mixture into said combustion chamber where it is ignited, said means for producing said swirl, said passage and said annular entry constructed and arranged to cause said swirling motion to be maintained downstream of the flame holder in the combustion chamber, cooperating to produce a stable flame in the combustion chamber without substantial heating of the wall defining said passage, the exits for hot gases of said burner head being in a common plane.
Claim 10
Dependent Claim
205 words
Burner for gaseous fuel, the burner capable of use with oxygen to produce high intensity heat comprising the combination in a burner head of a plurality of combustion chambers each having an annular entry for mixture of gaseous fuel and oxidizer and an exit for hot gases, said annular entry defined by a central flame holder member and a surrounding wall defining a passage, said passage communicating with a swirl chamber spaced apart upstream of said flame holder, means associated with said swirl chamber to effectively impart swirling motion to a gaseous mixture of fuel and oxidizer, with said swirl substantially coaxial with said annulus, said passage shaped to conduct said swirling mixture to said annular entry and said annular entry shaped to introduce a swirling annular ring of said gaseous mixture into said combustion chamber where it is ignited, said means for producing said swirl, said passage and said annular entry constructed and arranged to cause said swirling motion to be maintained downstream of the flame holder in the combustion chamber, cooperating to produce a stable flame in the combustion chamber without substantial heating of the wall defining said passage, the exits for hot gases of said burner head being in a common plane.
Claim 11
Dependent Claim
35 words
The burner of claim 7 wherein the burner chambers surround a passage for oxygen extending through said burner head, said passage having an exit centrally located within said exits for hot gas on said plane.
Claim 12
Dependent Claim
33 words
The burner of claim 1 wherein said swirling means is constructed and arranged to enable advance of said whirling mixture in a helical flow with a helix angle between about 40* and 50*.
Claim 13
Dependent Claim
19 words
The burner of claim 9 wherein said annular entry has a radial width between 0.002 inch and 0.012 inches.
Claim 14
Dependent Claim
42 words
The burner of claim 3 wherein said flame holder is supported upon a support member which extends through said swirl chamber, the swirl pattern of said mixture circulating about said support member, and proceeding therealong to said entry to said combustion chamber.
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |