Patent US3600892A successfully refreshed from Google Patents.
US3600892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion devices
Assignee: TECHNOLOGY UK
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Filing: 1969-06-04
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Granted: 1971-08-24
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Expires: 1989-06-04
Abstract
Abstract A flame stabilizer member is generally of circular cross section with its surface extended in the downstream direction as a faired flap (i.e., ''''teardrop'''' shape). The turbulence normally set up by the separation of flow over the member constitutes a flame stabilization zone. Separation can be prevented by applying suction to holes formed in the surface of the stabilizer, the turbulent zone being thereby suppressed and drag reduced. In a typical arrangement, annular stabilizing members are supported by a spider of hollow elliptical struts connected to a suction source and carrying fuel spray tubes upstream of the stabilizing members.
Inventors
- 👤 William Dean Bryce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:44
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
72 words
A combustion device comprising a fluid duct, a member disposed within the duct and having a substantially circular cross section with a protuberant trailing edge portion, and means for applying suction through the surface of the member whereby flow can be induced to attach to the trailing edge portion of the member to vary the wake formed by the member to produce a flame stabilization zone in a swiftly moving fluid stream.
Claim 2
Dependent Claim
72 words
A combustion device comprising a fluid duct, a member disposed within the duct and having a substantially circular cross section with a protuberant trailing edge portion, and means for applying suction through the surface of the member whereby flow can be induced to attach to the trailing edge portion of the member to vary the wake formed by the member to produce a flame stabilization zone in a swiftly moving fluid stream.
Claim 3
Dependent Claim
29 words
A combustion device according to claim 1, wherein the surface of said member is pierced by discrete holes, the interior of said member being connected to said suction-applying means.
Claim 4
Dependent Claim
44 words
A combustion device, comprising fluid duct means; at least one member disposed within said duct means; means influencing boundary layer flow over the surface of said member to vary the wake formed thereby; and means for applying suction through the surface of said member.
Claim 5
Dependent Claim
44 words
A combustion device, comprising fluid duct means; at least one member disposed within said duct means; means influencing boundary layer flow over the surface of said member to vary the wake formed thereby; and means for applying suction through the surface of said member.
Claim 6
Dependent Claim
28 words
A combustion device according to claim 1 further comprising a fuel spray tube located upstream of the member relative to flow through the duct and substantially aligned therewith.
Claim 7
Dependent Claim
53 words
A combustion device according to claim 1 comprising an annular tube mounted coaxially with the duct and of a substantially circular cross section which is flared in the downstream direction relative to flow through the duct to form a protuberant trailing edge portion, the surface of the tube being pierced by discrete holes.
Claim 8
Dependent Claim
22 words
A combustion device according to claim 5 comprising a plurality of such annular tubes of differing diameters disposed transverse of the duct.
Claim 9
Dependent Claim
20 words
A combustion device according to claim 6 in which the annular tubes are located substantially in a common transverse plane.
Claim 10
Dependent Claim
41 words
A combustion device according to claim 5 having an annular fuel spray tube of corresponding mean diameter to that of the annular tube located upstream of the annular tube relative to flow through the duct and coaxial with the annular tube.
Claim 11
Dependent Claim
46 words
A combustion device according to claim 6 having a like number of annular fuel spray tubes each corresponding in mean diameter to one of the annular tubes and located upstream of the annular tubes relative to flow through the duct and coaxial with the annular tubes.
Claim 12
Dependent Claim
25 words
A combustion device according to claim 9 in which the annular spray tubes are located substantially in a common transverse plane relative to the duct.
Claim 13
Dependent Claim
37 words
A combustion device according to claim 5 in which the annular tube is supported in the duct at least in part by a hollow strut serving to connect the interior of the tube with said suction-applying means.
Claim 14
Dependent Claim
34 words
A combustion device according to claim 6 in which the annular tubes are supported in the duct by at least one hollow strut which connects the interiors of the tubes with said suction-applying means.
Claim 15
Dependent Claim
45 words
A combustion device according to claim 8 in which the annular tube is supported in the duct at least in part by a hollow strut which connects the interior of the tube with said suction-applying means and which also supports the annular fuel spray tube.
Claim 16
Dependent Claim
44 words
A combustion device according to claim 9 in which the annular tubes are supported in the duct by at least one hollow strut which connects the interiors of the tubes with a said suction-applying means and which also supports the annular fuel spray tubes.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |