US3807940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner for burning off gas
Assignee: Sulzer AG
•
Filing: 1972-08-24
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Granted: 1974-04-30
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Expires: 1992-08-24
Abstract
Abstract The gas to be burned is delivered through an annular gas inlet into a flared portion at the bottom end of the mixing tube while air is brought in through the open bottom end so that an annular curtain of flame is formed on burning. A means for preventing flashback of the flame is positioned in the upper end of the mixing tube in the form of parallel or concentric tubes. One or more shield tubes are also positioned about the upper end of the mixing tube to permit cooling of the flame by ambient air.
Inventors
- 👤 E Juricek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:02
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D14/64; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; F23D14/72; F23D14/82; F23G; F23G7/00; F23G7/06; F23G7/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
A burner for burning off gas comprising a substantially vertical mixing tube having an open bottom end communicating with a surrounding atmosphere and a curved outwardly flared portion at said bottom end; a fuel gas inlet disposed near said bottom end of said tube in communication with a source of fuel gas and adjacent said flared portion for introducing a gas into said mixing tube in an annular pattern; means at an upper end of said mixing tube for preventing flashback of a flame generated by burning of the gas passing through said mixing tube; and an annular gas supply chamber upstream of and in communication with said gas inlet, said mixing tube defining a side of said chamber, and said chamber having a frusto conical wall surface opposite said mixing tube extending approximately tangentially towards and terminating adjacent a lower surface of said flared portion of said mixing tube to define said gas inlet.
Claim 2
Dependent Claim
155 words
A burner for burning off gas comprising a substantially vertical mixing tube having an open bottom end communicating with a surrounding atmosphere and a curved outwardly flared portion at said bottom end; a fuel gas inlet disposed near said bottom end of said tube in communication with a source of fuel gas and adjacent said flared portion for introducing a gas into said mixing tube in an annular pattern; means at an upper end of said mixing tube for preventing flashback of a flame generated by burning of the gas passing through said mixing tube; and an annular gas supply chamber upstream of and in communication with said gas inlet, said mixing tube defining a side of said chamber, and said chamber having a frusto conical wall surface opposite said mixing tube extending approximately tangentially towards and terminating adjacent a lower surface of said flared portion of said mixing tube to define said gas inlet.
Claim 3
Dependent Claim
129 words
A burner for burning off gas comprising a substantially vertical mixing tube having an open bottom end communicating with a surrounding atmosphere; a gas inlet disposed near said bottom end of said tube for introducing a gas into said mixing tube in an annular pattern; and means at an upper end of said mixing tube for preventing flashback of a flame generated by burning of the gas passing through said mixing tube, said means including a plurality of ducts arranged in side by side relation with axes parallel to a longitudinal axis of said mixing tube, said ducts adjacent the peripheral surface of said mixing tube having lower extremities disposed in a higher horizontal plane than the lower extremities of said ducts in the center of said mixing tube.
Claim 4
Dependent Claim
129 words
A burner for burning off gas comprising a substantially vertical mixing tube having an open bottom end communicating with a surrounding atmosphere; a gas inlet disposed near said bottom end of said tube for introducing a gas into said mixing tube in an annular pattern; and means at an upper end of said mixing tube for preventing flashback of a flame generated by burning of the gas passing through said mixing tube, said means including a plurality of ducts arranged in side by side relation with axes parallel to a longitudinal axis of said mixing tube, said ducts adjacent the peripheral surface of said mixing tube having lower extremities disposed in a higher horizontal plane than the lower extremities of said ducts in the center of said mixing tube.
Claim 5
Dependent Claim
63 words
A burner as set forth in claim 1 wherein said means includes a plurality of ducts arranged in side by side relation, said ducts extending downwardly from a common horizontal plane having axes parallel to a longitudinal axis of said mixing tube, said ducts adjacent the wall of said mixing tube being shorter than the ducts in the center of said mixing tube.
Claim 6
Dependent Claim
35 words
A burner as set forth in claim 1 further comprising at least one shield tube having an open top and open bottom disposed in spaced surrounding relation about said upper end of said mixing tube.
Claim 7
Dependent Claim
19 words
A burner as set forth in claim 1 further comprising an ignition means above said means for preventing flashback.
Claim 8
Dependent Claim
17 words
A burner as set forth in claim 5 where said ignition means is an incandescent lighting means.
Claim 9
Dependent Claim
16 words
A burner as set forth in claim 5 where said Ignition means is a pilot burner.
References Cited (Backward Citations)
US769568A
Cited
US2167183A
Cited
US2667156A
Cited
US2888981A
Cited
US3173411A
Cited
US3354681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |