US4875850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burner of the blown air and premixture type
Assignee: SERVICE NATIONAL GAZ DE FRANCE
•
Filing: 1987-11-02
•
Granted: 1989-10-24
•
Expires: 2007-11-02
Abstract
Abstract Gas burner of relatively low power of the blown air and premixture type comprising separate intakes for air and for combustible gas passing into a premixing chamber discharging into a combustion chamber at the level of which the premixture is ignited by means of a lighting electrode, the air intake and combustible gas intake each comprising at least one flow regulating valve. The burner is characterized in that a device having a calibrated orifice of the injector type is provided on the combustible gas intake while a passage of relatively small cross-section, of the diaphragm type, is provided on the air intake. The invention is particularly applicable to installations comprising this burner to serve as a pilot lighting burner.
Inventors
- 👤 Francois Cagnon
- 👤 Denis Di Paola
- 👤 Georges Austruy
- 👤 Andre Vinchon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:14
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23C; F23C3/00; F23C3/004; F23Q; F23Q9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A method of lighting a pilot burner for a main burner, said pilot having a premixing chamber with separate inlets for air and combustible gas, and a metallic flame-stabilizing grille through which a mixture of air and combustible gas is introduced into a combustion chamber of said main burner, said method comprising: feeding air and combustible gas through said inlets into said premixing chamber at a ratio of air:combustible gas less than the stoichiometric ratio thereof and passing the resulting sub-stoichiometric mixture through said grille into said combustion chamber; feeding a mixture of air and combustible gas directly into said combustion chamber of said main burner of a ratio of air:combustible gas sufficiently greater than the stoichiometric ratio thereof to provide a stoichiometric mixture of the gases fed directly into said combustion chamber and of the gases fed through said flame-stabilizing grille, and directing toward said grille at least a portion of the mixture of gases which were directly fed into said combustion chamber; and igniting the mixture of air and combustible gas which passes through said grille from said premixing chamber.
Claim 2
Independent Claim
182 words
A method of lighting a pilot burner for a main burner, said pilot having a premixing chamber with separate inlets for air and combustible gas, and a metallic flame-stabilizing grille through which a mixture of air and combustible gas is introduced into a combustion chamber of said main burner, said method comprising: feeding air and combustible gas through said inlets into said premixing chamber at a ratio of air:combustible gas less than the stoichiometric ratio thereof and passing the resulting sub-stoichiometric mixture through said grille into said combustion chamber; feeding a mixture of air and combustible gas directly into said combustion chamber of said main burner of a ratio of air:combustible gas sufficiently greater than the stoichiometric ratio thereof to provide a stoichiometric mixture of the gases fed directly into said combustion chamber and of the gases fed through said flame-stabilizing grille, and directing toward said grille at least a portion of the mixture of gases which were directly fed into said combustion chamber; and igniting the mixture of air and combustible gas which passes through said grille from said premixing chamber.
References Cited (Backward Citations)
DE1008855B
Cited
FR1057371A
Cited
US3228451A
Cited
US3192920A
Cited
US3730668A
Cited
US3770369A
Cited
US3890084A
Cited
US3957421A
Cited
US4289474A
Cited
US4224019A
Cited
US4236464A
Cited
JPS5691108A
Cited
US4499890A
Cited
FR2510731A1
Cited
DE3230853A1
Cited
US4752213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |