US3724994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner
Assignee: BP PLC
•
Filing: 1970-05-01
•
Granted: 1973-04-03
•
Expires: 1990-05-01
Abstract
Abstract A burner for gaseous fuels, e.g. methane or hydrogen, has a porous exit sheet adjacent to a base plate. The two sheets are perforated to allow the passage of air, and fuel gas circulates between the sheets and around the perforations. The fuel passes through the porous sheet to burn with air passing through the perforations.
Inventors
- 👤 D Desty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:58
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/20; F23C; F23C2900/00; F23C2900/9901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A burner for gaseous fuels, which burner is less than 10 mm thick and comprises a perforated porous exit sheet of metal foam one side of which is adjacent to a combustion zone and the other side of which is adjacent to a perforated base plate to which the exit sheet is connected in such a manner that: a. The perforations in the exit sheet mate with the perforations in the base plate so as to allow air to pass through them, and b. The exit sheet is spaced apart from the base plate between the perforations so as to form fuel passages whose resistance to the flow of fuel gas is low compared with the flow resistance through the exit sheet, the exit sheet being joined to the base plate along the sides of the fuel passages so as to prevent excessive escape of gas through the joints, the whole configuration being such that during the use of the burner gaseous fuel passes throughout the fuel passages and thence via the porous exit sheet into the combustion zone where it burns with air drawn through the perforations.
Claim 2
Dependent Claim
188 words
A burner for gaseous fuels, which burner is less than 10 mm thick and comprises a perforated porous exit sheet of metal foam one side of which is adjacent to a combustion zone and the other side of which is adjacent to a perforated base plate to which the exit sheet is connected in such a manner that: a. The perforations in the exit sheet mate with the perforations in the base plate so as to allow air to pass through them, and b. The exit sheet is spaced apart from the base plate between the perforations so as to form fuel passages whose resistance to the flow of fuel gas is low compared with the flow resistance through the exit sheet, the exit sheet being joined to the base plate along the sides of the fuel passages so as to prevent excessive escape of gas through the joints, the whole configuration being such that during the use of the burner gaseous fuel passes throughout the fuel passages and thence via the porous exit sheet into the combustion zone where it burns with air drawn through the perforations.
Claim 3
Dependent Claim
16 words
A burner according to claim 1, in which the burner is less than 5 mm thick.
Claim 4
Dependent Claim
21 words
A burner according to claim 1, in which the perforations are circular and have an area of 0.01 - 1 cm2.
Claim 5
Dependent Claim
27 words
A burner according to claim 1, in which the number of perforations iS such that they account for 20-50 percent of the total area of the burner.
Claim 6
Dependent Claim
27 words
A burner according to claim 4, in which the number of perforations is such that they account for 25-35 percent of the total area of the burner.
References Cited (Backward Citations)
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Cited
US1488677A
Cited
US2227899A
Cited
US2194208A
Cited
US3173470A
Cited
US3147545A
Cited
US3198240A
Cited
US3367149A
Cited
US3437416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |