US4673349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature surface combustion burner
Assignee: NGK Insulators Ltd
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Filing: 1985-12-16
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Granted: 1987-06-16
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Expires: 2005-12-16
Abstract
Abstract A high temperature surface combustion burner, comprises a burner head having an air fuel mixed gas supply inlet, a burner plate secured to said burner head, wherein the burner plate is made of a ceramic porous body having more than 30% by volume of pores of 25 to 500 μm in mean pore diameter; and a plurality of throughholes having a 0.05 to 5.0 mm diameter and provided in said burner plate at intervals of 2 to 30 mm and substantially vertically extending with respect to the combustion surface. Another surface combustion burner comprises a burner head having an air fuel mixed gas supply inlet, a burner element secured to said burner head, said burner element consisting of a ceramic porous body having pores sufficiently communicated from its inside to its outside for diffusing an air fuel mixed gas, wherein said ceramic porous body has 75 to 95% by volume in total of communicated pores of 0.5 to 5.0 mm in mean pore diameter; and a plurality of throughholes each having a hydraulic diameter of 0.05-5.0 mm and substantially vertically extending with respect to the combustion surface and provided in said burner element at intervals of 2 to 30 mm.
Inventors
- 👤 Fumio Abe
- 👤 Hiroshi Hasegawa
- 👤 Tadashi Fujita
- 👤 Makoto Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:26
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/12; F23D2203/00; F23D2203/10; F23D2203/102; F23D2203/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A high temperature surface combustion burner, comprising a burner head having an air-fuel mixed gas supply inlet, a burner plate secured to said burner head and spaced apart from said gas supply inlet, said burner plate consisting of a ceramic porous body having an inlet side and an outlet combustion side and pores being sufficiently communicated from said inlet side to said outlet side for diffusing an air-fuel mixed gas therethrough, said ceramic porous body having more than 30% by volume of pores of 25 to 500 μm in mean pore diameter; a plurality of throughholes for diffusing the air-fuel mixed gas, each throughhole having a hydraulic diameter of 0.05-5.0 mm and substantially vertically extending with respect to the outlet combustion side of the ceramic porous body and provided in said burner plate at intervals of 2 to 30 mm, whereby substantially uniform combustion occurs on the outlet combustion side of the ceramic porous body by flowing said air-fuel mixed gas through said plurality of throughholes and through said pores.
Claim 2
Dependent Claim
170 words
A high temperature surface combustion burner, comprising a burner head having an air-fuel mixed gas supply inlet, a burner plate secured to said burner head and spaced apart from said gas supply inlet, said burner plate consisting of a ceramic porous body having an inlet side and an outlet combustion side and pores being sufficiently communicated from said inlet side to said outlet side for diffusing an air-fuel mixed gas therethrough, said ceramic porous body having more than 30% by volume of pores of 25 to 500 μm in mean pore diameter; a plurality of throughholes for diffusing the air-fuel mixed gas, each throughhole having a hydraulic diameter of 0.05-5.0 mm and substantially vertically extending with respect to the outlet combustion side of the ceramic porous body and provided in said burner plate at intervals of 2 to 30 mm, whereby substantially uniform combustion occurs on the outlet combustion side of the ceramic porous body by flowing said air-fuel mixed gas through said plurality of throughholes and through said pores.
Claim 3
Dependent Claim
34 words
A high temperature surface combustion burner as defined in claim 1, wherein the ceramic porous body contains 2 to 50% by weight of a heat-resisting inorganic fiber mixed therein, thereby forming a composite material.
Claim 4
Dependent Claim
20 words
A high temperature surface combustion burner as defined in claim 2, wherein the heat-resisting inorganic fiber comprises a ceramic fiber.
Claim 5
Dependent Claim
24 words
A high temperature surface combustion burner as defined in claim 1, wherein the diameter of said plurality of throughholes is 0.5 to 2.0 mm.
Claim 6
Dependent Claim
170 words
A surface combustion burner comprising: a burner head having an air-fuel mixed gas supply inlet, a burner element secured to said burner head and spaced apart from said gas supply inlet, said burner element having an inlet side and an outlet combustion side and consisting of a ceramic porous body with pores being sufficiently communicated from said inlet side to said outlet side for diffusing an air-fuel mixed gas therethrough, said ceramic porous body having 75 to 95% total volume of communicated pores having a mean pore diameter of 0.5 to 5.0 mm; and a plurality of throughholes for diffusing the air-fuel mixed gas, each throughhole having a hydraulic diameter of 0.5-5.0 mm and substantially vertically extending with respect to the outlet combustion side of the burner element and provided in said burner element at intervals of 2 to 30 mm, whereby substantially uniform combustion occurs on the outlet combustion side of the burner element by flowing said air-fuel mixed gas through said plurality of throughholes and through said pores.
Claim 7
Dependent Claim
170 words
A surface combustion burner comprising: a burner head having an air-fuel mixed gas supply inlet, a burner element secured to said burner head and spaced apart from said gas supply inlet, said burner element having an inlet side and an outlet combustion side and consisting of a ceramic porous body with pores being sufficiently communicated from said inlet side to said outlet side for diffusing an air-fuel mixed gas therethrough, said ceramic porous body having 75 to 95% total volume of communicated pores having a mean pore diameter of 0.5 to 5.0 mm; and a plurality of throughholes for diffusing the air-fuel mixed gas, each throughhole having a hydraulic diameter of 0.5-5.0 mm and substantially vertically extending with respect to the outlet combustion side of the burner element and provided in said burner element at intervals of 2 to 30 mm, whereby substantially uniform combustion occurs on the outlet combustion side of the burner element by flowing said air-fuel mixed gas through said plurality of throughholes and through said pores.
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) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |