US3733164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous media tunnel burner
Assignee: Shell USA Inc
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Filing: 1971-07-09
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Granted: 1973-05-15
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Expires: 1991-07-09
Abstract
Abstract A porous media burner comprises an outer casing of impermeable material separated by a gas distributing space from an inner hollow core, open at one end, of a porous medium. The fuel mixture enters the gas distributing space between the casing and the core and then passes through the core to the hollow space of the core.
Inventors
- 👤 D Westlake
- 👤 K Coles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
F; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F23D2203/00; F23D2203/10; F23D2203/101; F23D2203/1012; F23D2203/105; F23D2206/00; F23D2206/0094
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A porous media burner comprising: an impermeable casing having inlet and outlet ports thereiN; a hollow core having a wall composed of a permeable, porous medium connected to the casing, the hollow core having an opening therein and being positioned within the casing with the opening in communication with the outlet port of the casing; the casing and the hollow core being composed of a refractory material of substantially the same composition; the hollow core being spaced from the casing about a substantial portion of the outer surface area of the core whereby a gas distributing space is defined between the hollow core and the casing; the gas distributing space being in communication with the inlet port of the casing; whereby a combustible gas mixture may flow through the inlet port into the gas distributing space, pass through the permeable wall of the hollow core from the gas distributing space to the hollow space of the core, and then exit from the casing through the outlet port.
Claim 2
Dependent Claim
167 words
A porous media burner comprising: an impermeable casing having inlet and outlet ports thereiN; a hollow core having a wall composed of a permeable, porous medium connected to the casing, the hollow core having an opening therein and being positioned within the casing with the opening in communication with the outlet port of the casing; the casing and the hollow core being composed of a refractory material of substantially the same composition; the hollow core being spaced from the casing about a substantial portion of the outer surface area of the core whereby a gas distributing space is defined between the hollow core and the casing; the gas distributing space being in communication with the inlet port of the casing; whereby a combustible gas mixture may flow through the inlet port into the gas distributing space, pass through the permeable wall of the hollow core from the gas distributing space to the hollow space of the core, and then exit from the casing through the outlet port.
Claim 3
Dependent Claim
51 words
The porous media burner of claim 1 wherein the casing and the hollow core are cylindrical and coaxial, the opening in the core and the outlet port of the casing being adjacent one end of the cylindrical casing and the inlet port being adjacent the opposite end of the cylindrical casing.
Claim 4
Dependent Claim
36 words
The porous media burner of claim 1, wherein the refractory material of the casing and core, respectively, comprises first and second gradings of a high alumina aggregate, the first grading being more dense than the second.
Claim 5
Dependent Claim
34 words
The porous media burner of claim 1, wherein the refractory material of the casing and core, respectively, comprises first and second gradings of zirconia-based aggregates, the first grading being more dense than the second.
Claim 6
Dependent Claim
17 words
The porous media burner of claim 1 wherein the casing and the core are connected by sintering.
Claim 7
Dependent Claim
22 words
The porous media burner of claim 1 wherein the wall thickness of the hollow core is between one-fourth inch and 2 inches.
Claim 8
Dependent Claim
28 words
The porous media burner of claim 1 including a nozzle part positioned in the outlet port of the casing in communication with the opening in the hollow core.
Claim 9
Dependent Claim
26 words
The porous media burner of claim 7 wherein the nozzle part consists of a zirconia aggregate and the casing and core consists of a alumina aggregate.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |