Gas burner having lateral openings and a device for deflecting the flames upwards

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BRIEF DESCRIPTION OF THE DRAWINGS

GAS BURNER HAVING LATERAL OPENINGS AND

A DEVICE FOR DEFLECTING THE FLAMES FIG. 1 shows an axial sectional view of a gas burner UPWARDS according to the invention.

FIGS. 2-8 show variants of the burner according to

This is a division of application Ser. No. 306,775 filed the invention.

Nov. 15, 1972 and now U.S. Pat. No. 3,817,689. DESCRIPTION OF THE PREFERRED

EMBODIMENTS

BACKGROUND OF THE INVENTION

10 FIG. 1 shows an embodiment of a burner according 1. Field of the Invention

The present invention relates to a gas burner com to the invention. It comprises a venturi 1, the collar 2 of prising a mixing chamber having a substantially cylin which supports a lower circular pan 3, with the excep drical thin, lateral wall with vertical generatrices perfotion of 3 bosses such as 4, distributed at an angle of rated by outlets for the combustion mixture. More par 120 from5. each other and serving to calibrate the pilot ticularly, it relates to circular burners for cooking 15 opening The pan 3 supports a circular mixing cham ber, comprising a burner pan 6 having a cylindrical,

StoveS.

2. Prior Art vertical, lateral wall, provided with extended discharge Gas burners with a thick cast metal wall are already apertures 7 for the main flames. Its base 8 is perforated known, in which it is possible to direct the flames up 20 defined by the9pan by apertures supplying the expansion chamber 10, wards in a slanting manner by directing the apertures in comprises a slightly3.convex

The circular mixing chamber also the cylindrical vertical wall. This insures better heat cal deflector 12. The covercover 11 and a frusto-coni output and cleaner combustion by reducing the propor dered integral with the wall and the deflector are ren tion of unburned and incompletely burned gas. Less ex crimping the upper edge 14 of the mixing chamber by pensive burners of a simpler design and made of thin 25 of these parts. The deflector 12the of wall over the edges deflects the flames up sheet metal, are also known. Burners of this type have wards in a slanting manner. In the absence of this de the particular disadvantage of becoming soiled when flector they would be substantially horizontal. the liquid in a container placed on the burner, boils way, the flames reach the base of the containerintothis over. On the other hand, a certain amount of lining oc heated, which is placed above the burner, closer to be its curs, i.e. the enamel cracks during operation of the 30 axis than in the absence of the deflector. The flames are burner when the burner cover is made of ordinary also longer. The heat output is thus improved and the enamelled metal, due to the disparities in temperature rate of complete combustion increased, thereby avoid between the periphery and the centre. ing the discharge of unburned hydrocarbons or carbon SUMMARY OF THE INVENTION monoxide.

35 Each of the parts constituting the burner can thus be

The object of the present invention is to provide a gas made of inoxidable thin sheet metal adapted for regular burner with a cover adapted to withstand without dam service conditions or suitably protected. The cover 11 age the thermal stresses produced by temperature dis is coated with catalytic enamel prior to the crimping parities during the operation thereof. operation.

Another object of the invention is to make it possible 40 In the embodiment shown in FIG. 2, the burner com to dismantle the cover. prises a venturi 1 having a peripheral collar 2 which Yet another object of the invention is to eliminate the supports a lower circular pan 3, with the exception of 3 cleaning process as the cover is self-cleaning. bosses 4 distributed on the circumference and serving The gas burner according to the invention is charac to calibrate a pilot opening 5. The pan 3 supports a cir terized in that it comprises a cover which is resistant to 45 cular mixing chamber 6, comprising a burner pan 8 thermal stresses, and a deflector which is disposed in having a cylindrical, vertical, lateral wall provided with side the mixing chamber and which comprises a slant extended discharge apertures 7 for the main flames. Its ing part for directing the flames upwards in a slanting base 8 is perforated by apertures 9 supplying the pilot ale. chamber 10. It also comprises a slightly convex cover Advantageously, the burner according to the inven 50 11 coated with a catalytic enamel and a deflector 12 tion also comprises at least one of the following fea having a frusto-conical lateral wall and an incurvated tures: the cover is coated with a catalytic, enamel, thus solid base 13. The cover 11 and the deflector 12 are rendering the burner self-cleaning; the cover is made of rendered integral with the wall of the mixing chamber metal coated with a catalytic enamel; the burner cover by crimping the upper edge 14 over the edges of these is made of ceramic material; the ceramic cover com 55 parts. The main flames are deflected upwards in a slant prises a lower wall having a slanting part forming a de ing manner by the deflector 12. This deflector 12 is flector which directs the flames upwards in a slanting solid and it defines the chamber 6 for mixing combusti manner; the ceramic cover is arranged with a deflector ble gas and primary air. The volume of the mixing made of thin metal, at the upper part of the burner chamber may be varied by giving the base of the deflec body; the ceramic cover is placed on the burner, the 60 tor a flat shape or a more or less incurvated shape ac deflector comprising a solid base; the cover comprises cording to the gas used, its pressure and the capacity of a horizontal part covering the flames in the low inten the burner.

sity area. In the embodiment represented in FIG. 3, the venturi Other features of the present invention will be made and the pilot chamber are not shown. The burner com apparent from the following detailed description of the 65 prises a circular mixing chamber 6. This comprises a preferred embodiments thereof, provided by way of pan 8 having a cylindrical lateral wall provided with ex non-limitative examples, and from the accompanying tended apertures 7 for discharging the main flames. Its drawings representing said embodiments. base 8 is perforated by apertures 9 supplying the pilot

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chamber situated below the wall 8. The burner also FIG. 6 shows a burner having, an enamelled metal . comprises a slightly convex cover 11 and a deflector 12 cover. As in FIG. 1, it consists of a venturi, the collar of having a frusto-conical lateral wall and a solid or hol which supports a lower circular pan 3, with the excep low base. The cover ill and the deflector 12 are ren tion of 3 bosses such as 4. These bosses, which are used dered integral with the wall of the mixing chamber by to calibrate the pilot opening, are distributed at an crimping the upper edge 14 of this wall over the edges angle of 120° from each other. The pan 3 supports a of these parts. The main flames are deflected upwards circular mixing chamber comprising a burner pan 6 in a slanting manner by the deflector 12. having a cylindrical, vertical, lateral wall provided with The cover 11 is made of ceramic material and it may 10 extended outlets 7 for the main flames. The horizontal also be coated with a catalytic enamel. The use of a cat crown 20 forms an extension of the vertical wall. The alytic enamel allows the burner to be kept permanently base 8 of the burner pan is perforated by openings 9 clean. supplying the expansion chamber limited by the pan 3. . FIG. 4 shows a burner of the same type, comprising The mixing chamber also comprises a deflector 12 the same elements as that of FIG. 3 but in which the having a frusto-conical lateral wall, a convex base and

cover 11 and the deflector 12 are replaced by a single a slightly convex cover 11. The cover 11 and the de ceramic part 11 forming both a burner cover and a de flector 12 are rendered integral with the pan 6 of the flector redirecting the flames upwardly. For this rea mixing chamber by crimping the upper edge 21 of the son, the lower part of the member 11 is the same shape crown of the pan over the edges of these parts. The as the deflector in FIG. 2, i.e., it comprises at least one crown 20 may be flat or slightly convex. Its outer diam part shaped in the form of an inverted truncated cone 20 eter is in the order of one-third to twice its inner diame directing the flames in a slanting manner upwards. The ter which is also that of the vertical wall of the pan 6 edge of the lateral wall 14 of the mixing chamber is limiting the mixing chamber. .... . . crimped over the edge of the cover 11. FIG. 7 shows a burner with a ceramic cover 11. The FIG. 5 shows another variant of the burner in which reference numerals used in FIG.7 have the same mean the cover 11 consists of a ceramic tablet which is sim 25 ing as those used in FIG. 1 but the venturi has not been ply placed on the burner. In this case, the deflector 12 represented. The ceramic cover also acts as a deflector, made of thin sheet metal, is solid and is mounted at 14the lower part of the cover having the same shape as on the edge of the lateral wall of the burner body in the deflector shown in FIG. 1. The cover also com such a manner as to close the mixing chamber. The 30 prises a crown 22 which rests on the crown 20. The edge of the tablet 11 comprises an inclined part 17 al cover 11 and the pan 6 of the mixing chamber are lowing the tablet to be applied to and centred on the joined by crimping the upper edge 21 of this pan over , deflector-burner body assembly. the edge of the cover. ; :- FIGS. 6, 7 and 8 show embodiments of burners ac FIG. 8 shows a burner with a ceramic cover 11. The cording to the invention, permitting a low intensity cover is detachable. The reference numerals used in .

heating action to be obtained more easily in containers FIG. 8 have the same meaning as those used in FIGS. 1, used for the cooking operation known as "simmering' and further permitting the heat to be distributed in a 6ceramic and 7 but the venturi has not been represented. The uniform manner under the base of the cooking utensils. assemblycover formed 11 comprises a crown 22. It rests on the by the metal deflector 12 and the pan

It is already known in the art to obtain this type of ef 40 6 which are joined by crimping the upper edge 23 of fect by interposing a concave metal screen between the this pan over the edge of the deflector. .. . .. burner head and the container. The metal screenthus acts as a diffuser. Obviously, the sheet metal or ceramic cover may also When the metal screen is integral with a grill which beThe enamelled with a catalytic enamel. invention, which has been described, may obvi supports the containers to be heated, this screen is 45 ously be modified in various ways without departing soldered to the grill and the soldered joints are situated from the scope of the invention and certain elements, in the flame when the burner is on "high". For this rea may be replaced by others having the same technical son it is necessary to use soldering materials having a very high point of fusion. Furthermore, the incorpora function. What

is claimed is:

tion of this type of metal screen considerably compli cates the manufacture of the grill. It is possible to use a 50 1. In a thin-walled burner having a mixing chamber metal screen known as a diffuser, which is placed on defined by a substantially cylindrical, thin, lateral wall the grill without a screen. A diffuser of this type, which with vertical generatrices perforated by vertical slots generally has fairly large dimensions in order to support for the combustion mixture, the improvement compris- : the cooking utensils, must be removed from the grill 55 ing a single piece cover means made of ceramic mate when the burner is fully "turned on'. rial attached to the upper edge of said lateral wall by a A gas burner according to the invention does not crimped portion, said cover means including a lower have the disadvantages of known burners when used face adjacent said slots inclined inwardly of said wall for "simmering'. Neither does a metal screen have to and away from said upper edge which constitutes a fuel be interposed between the burner and the container to 60 deflector. -- - --

be heated. 2. A burner according to claim 1 wherein said lower A gas burner adapted for low intensity cooking is face is in the form of a truncated cone so as to deflect produced by surrounding the lateral wall of the mixing the fuel upwards in a slanting manner. chamber and the upper part of the same with a horizon outer 3. A gas burner according to claim 1 wherein the tal crown which is flat or slightly concave toward the 65 diameter of the cover and deflector meansis one base. The outer diameter of the crown is one-third to third to twice the inner diameter of the vertical genera twice the inner diameter so as to cover the flames when trices defining the mixing

chamber.

the burner is operated at its minimum rate.

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UNITED STATES PATENT AND TRADEMARK OFFICE

CERTIFICATE OF CORRECTION

INVENTOR(S) : Marce. CAPY

It is Certified that error appears in the above-identified patent and that said Letters Patent are hereby Corrected as shown below:

IN THE HEADING:

ADD:

Foreign Application Priority Data

November 15, 1971 France . . . . . . . . . . . . . . . . . 7.140801

signed and eealed this twenty-fourth Day of February 1976

SEAL

Attest.

Attesting Officer Commissioner of Patents and Trademarks