US3981675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic burner construction
Assignee: RTX Corp
•
Filing: 1974-12-19
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Granted: 1976-09-21
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Expires: 1994-12-19
Abstract
Abstract A burner construction especially for gas turbine engines in which the combustion takes place in a plurality of small porous ceramic burner cans that are mounted on a flame tube and extend substantially at right angles to the tube with fuel nozzles at the end remote from the flame tube.
Inventors
- 👤 Eugene J. Szetela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:15
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42; F23R3/50; F23C; F23C5/00; F23D; F23D23/00; F23R3/007; F23R3/28; F23C2900/00; F23C2900/05081
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
A burner construction including: a substantially cylindrical surrounding outer wall; an inner wall spaced from and enclosed by said outer wall, said inner wall having a plurality of holes therein; and a plurality of individual burner cans mounted on said inner wall, each burner can having a perforate sidewall and having a fuel nozzle opening at one end, and having the other end attached to one of the openings in the inner wall with the axis of each individual burner extending substantially at right angles to the inner wall, said burners being totally within the cylindrical outer wall.
Claim 2
Dependent Claim
98 words
A burner construction including: a substantially cylindrical surrounding outer wall; an inner wall spaced from and enclosed by said outer wall, said inner wall having a plurality of holes therein; and a plurality of individual burner cans mounted on said inner wall, each burner can having a perforate sidewall and having a fuel nozzle opening at one end, and having the other end attached to one of the openings in the inner wall with the axis of each individual burner extending substantially at right angles to the inner wall, said burners being totally within the cylindrical outer wall.
Claim 3
Dependent Claim
16 words
A burner as in claim 1 in which the individual burner cans are porous ceramic material.
Claim 4
Dependent Claim
23 words
A burner as in claim 1 in which the individual burner cans are made of porous ceramic and the inner wall is metallic.
Claim 5
Dependent Claim
24 words
A burner as in claim 2 in which each of the burner cans has a plurality of rows of holes in the side walls.
Claim 6
Dependent Claim
20 words
A burner as in claim 2 in which the burner cans are substantially cylindrical and are made of ceramic fibers.
Claim 7
Dependent Claim
107 words
A burner construction including: an outer substantially cylindrical wall; an inner substantially cylindrical wall spaced radially inwardly of the outer wall and defining between said inner and outer walls an annular combustion chamber; inner and outer flame tubes spaced apart and positioned between the inner and outer walls in spaced relation thereto, at least one of said tubes having a plurality of holes therein; and a plurality of individual burner cans mounted in said openings, each burner can having one end open and secured to one of the openings in said one of said tubes, the opposite end of the can having a nozzle receiving opening therein.
Claim 8
Dependent Claim
107 words
A burner construction including: an outer substantially cylindrical wall; an inner substantially cylindrical wall spaced radially inwardly of the outer wall and defining between said inner and outer walls an annular combustion chamber; inner and outer flame tubes spaced apart and positioned between the inner and outer walls in spaced relation thereto, at least one of said tubes having a plurality of holes therein; and a plurality of individual burner cans mounted in said openings, each burner can having one end open and secured to one of the openings in said one of said tubes, the opposite end of the can having a nozzle receiving opening therein.
Claim 9
Dependent Claim
36 words
A burner as in claim 6 in which the cans extend substantially at right angles to the tube and project toward the adjacent wall, the nozzle end of the can being spaced from said adjacent wall.
Claim 10
Dependent Claim
47 words
A burner as in claim 7 in which both tubes have openings, a plurality of cans are secured to both tubes, those on the outer tube extending substantially radially outward toward the outer wall, and those in the inner tube extending radially inward toward the inner wall.
Claim 11
Dependent Claim
14 words
A burner as in claim 6 in which the burner cans are porous ceramic.
Claim 12
Dependent Claim
14 words
A burner as in claim 8 in which the burner cans are porous ceramic.
Claim 13
Dependent Claim
23 words
A burner as in claim 6 in which the tubes are metallic and the burner cans are ceramic fiber material and are porous.
Claim 14
Dependent Claim
24 words
A burner as in claim 9 in which the walls of the burner cans have rows of holes therethrough in addition to the porosity.
References Cited (Backward Citations)
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Cited
US2777291A
Cited
US3247884A
Cited
US3425675A
Cited
US3671171A
Cited
US3856455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |