Abstract: Methods and apparatus are presented for producing carbon black on a substrate. One preferred method includes providing a head assembly including a nozzle, the nozzle including a first injector for injecting a gas such as acetylene, and a second injector for injecting a mixture of a fuel and an oxidant to produce a pilot flame. The head assembly is indexed over a substrate on which is to be deposited carbon black. The acetylene is injected through the first injector, then through a pilot flame emitted from one or more second injectors, and finally toward a substrate to be coated with carbon black, but only when a deposit of carbon black is desired. The method includes ceasing the flow of acetylene, indexing the head assembly away from the substrate on which was just deposited the carbon black after a carbon black deposition sequence, and ceasing fuel gas and oxidant gas flows through the second injector.

Abstract: A multiple-flame lighter, including: a lighter housing, a storage having an outlet valve, an inlet valve and a gas chamber for storing liquid fuel gas, a gas outlet control bar for controlling gas supply from said storage, and a windproof assembly connected to the gas pass of the storage, characterized in that it also includes: an electronic igniter, a flint igniter, an ignition controller, wherein between the sleeve and the windproof assembly there is provided with a flint igniter which is adjacent to the sleeve and a flame outlet which is connected to the gas pass of the storage. The single one lighter is simple in structure and may achieve powerful windproof effect and has advantages of long time service life, luminous application and less heat generation.

Abstract: A burner assembly includes a generally cylindrical burner tube having a combustion chamber. The burner tube supplies combustion air and combustion gas to the combustion chamber. A burner head assembly is disposed in the burner tube upstream of the combustion chamber. The burner head assembly includes a plurality of flame retention plates having a plurality of changeable flame retention plates removably mounted thereto. The flame retention plates include a base plate, at least one intermediate plate, and a top plate. Each of the base plate, the intermediate plate, and the top pate includes a plurality of combustion air flow and combustion gas flow apertures.

Abstract: A burner assembly has a ring generally centered on an axis and defining an array of outwardly open holes and a compartment at the axis. A gas/air mixture is fed to the ring to project jets of the mixture from the holes so that, when ignited, the jets form a main annular flame centered on the axis. A relatively small burner in the compartment is generally centered on the axis, and a horizontal plate on the ring overlies and covers the compartment and the burner. A gas/air mixture is supplied to the burner to the burner to form in the chamber underneath the plate a small flame centered on the axis. The cover plate is a generally circular disk having an outer diameter greater than an outer diameter of the small burner. The disk outer diameter is greater than an inner diameter of the ring.

Abstract: An adjusting device for a gas cooking appliance for adjusting the gas flow rate includes a distribution inlet conduit in fluid communication with a gas supply line of the gas cooking appliance, and a distribution outlet conduit in fluid communication with a gas burner line of the gas cooking appliance. A fluid communication can be established between the distribution inlet and outlet conduits via a plurality of parallel flow paths. A flow restrictor and a closing means that is operable by an electric or electronic control system of the gas cooking appliance are arranged in series in each individual flow path.

Abstract: A burner for a thermal post-combustion device comprises a combustion nozzle, which comprises a substantially hollow-cylindrical base member (1) at least virtually closed at one end by a cover (2). Fuel gas is supplied thereto axially at a particular pressure. The fuel gas flows out radially via main discharge openings (8) of the combustion nozzle. These main discharge openings (8) are at such a radial distance from the axis of the base member (1) and exhibit such a cross-section that, at the particular pressure of the supplied fuel gas, individual flames form at the main discharge openings (8) which substantially do not overlap. While maintaining the same total burner power, in this way the individual flames remain colder than in known burners, which produce a cohesive ball of flame instead of individual flames.

Abstract: A piezoelectric lighter includes a torch nozzle, having a receiving opening, received in the nozzle housing, a gas nozzle received in the nozzle housing at a position adjacent to the torch nozzle, and a fuel diverging system including a fuel guider having an fuel inlet communicating with the liquefied fuel storage and a fuel outlet, a first gas diffuser provided at the receiving opening of the torch nozzle to communicate the fuel outlet with the torch nozzle, and a second gas diffuser operatively connected to the fuel guider to communicate the liquefied fuel storage with the gas nozzle through the fuel lo inlet, in such a manner that the gas is released towards the torch nozzle and the gas nozzle through the first and second gas diffusers respectively to produce a torch flame and a flat flame in a synchronization manner.

Abstract: A burner for use in boilers and other fired heating systems comprising an outer containment tube and an inner mix tube in a concentric arrangement. The inner mix tube serves as a mix chamber for the fuel and the oxidant. The annular space between the inner mix tube and the outer containment tube forms the fuel chamber. A plurality of holes formed through the wall of the inner mix tube provides fluid communication between the fuel chamber and the mix chamber. Oxidant flows separately into the mix chamber where the incoming fuel mixes with the oxidant. The fuel-oxidant mixture then ignites at the burner tip, combusting cleanly and efficiently and forming combustion emissions that are low in NOx.

Abstract: An improved heating head (10) for a stove (30) based on the infrared heating technology, comprising a holding structure (12) for a series of radiating bodies (14) situated along a circumference.

Abstract: A combustion apparatus (1) is generally composed of a principal part (5), a supplementary part (6) and a burner port assembly (3). Four metal plates (7,8,10,11) constituting the principal and supplementary parts (5,6) are pressed to have in them several protuberances and recesses. These metal plates are laid one on another to form in them some hollow spaces and sealed regions. These hollow spaces communicate with each other to form a thin gas passage (22) together with a thick gas passage (73) in this combustion apparatus (1) in such a manner that its condition of thick and thin fuel combustion is rendered more stable.

Abstract: A burner arrangement includes a venturi cluster including a plurality of venturis arranged for parallel flow. The multi venturi arrangement utilizing pressurized fuel as the inducing fluid to induce a flow of air enables the provision of an ultra fuel lean premix of fuel and air. A central burner tube which extends outwardly beyond the delivery end of a primary burner tip and mounts a relatively small capacity nozzle at a substantial distance from the delivery end of the burner tip enabling the ultra fuel lean mixture to expand and slow down such that its linear speed does not exceed the flame speed of the mixture prior to by the flame of the spaced nozzle. A deflector may be positioned adjacent the nozzle to assist in stabilizing the flame after the expansion and slowing process has been completed.

Abstract: The present invention relates to a device for injecting a liquid fuel into a pressurized air flow (7), in particular for a combustion chamber, comprising a hollow cylindrical body (10) of longitudinal axis (YY′) delimiting a substantially cylindrical central volume (11), fluid veins (12) substantially radial in relation to the longitudinal axis of body (10) and arranged on the periphery of said body to allow passage of said flow, and axial fuel injection pipes (5) arranged inside said fluid veins and connected to at least one fuel inlet (3) by at least one supply point (16). According to the invention, pipes (5) are pierced with openings (9) that open onto central volume (11) of said body (10) and which are oriented substantially in the direction of the flow in fluid veins (12).

Abstract: A burner (1) for heat generation, in particular in a gas turbine, is disclosed as well as a method for the stabilization of the flame of a burner (1). The burner (1) comprises inlet openings (3) for a combustion air stream, at least a swirl generator (2) for the combustion air stream and one or more first fuel supplies (4) with first fuel outlet openings (5) for injection of fuel into the combustion air stream. At least one resonance tube (6) with an open (7) and an essentially closed end (8) is arranged in or at the burner (1), whose closed end (8) is positioned in the region of a flame front (9) which forms during operation of the burner (1) on the side of the burner (1). An outlet opening (10) of a supply (11) for a compressible medium is arranged at the open end (7) of the resonance tube (6).

Abstract: A combustion apparatus (1) with a burner port assembly (3) comprises an elongated first array of main burner ports (53) for jetting and burning a fuel gas mixture of a concentration to make main flames. The combustion apparatus (1) comprises at least one second arrays of auxiliary burner ports (63) for jetting and burning a further fuel gas mixture of a different concentration to make auxiliary flames, wherein the second arrays of said auxiliary burner ports (63) extend along the first array of said main burner ports (53). The burner port assembly (3) is constructed using inner and outer wall segments (52) together with outermost wall segments (52a,52f) or bands (58). One of the bands (58) faces the corresponding one of said outermost segments (52a,52f) so as to define between them collateral burner ports (61a,61b).

Abstract: A relighter apparatus for operating a pilot burner for a fuel pipeline heater. The relighter apparatus has a controller located at a first location, and a pilot burner assembly and ignition coil located at a second location which is remotely located a distance from the first location. The ignition coil is also electrically connected to the controller. The ignition coil receives a low voltage input based on a signal from the controller and provides a high voltage output at the output thereof. Current corresponding to the high voltage output is transferred from the ignitor coil, through a terminal and to an ignitor rod. A conduction of the electrical current between the second end of the ignitor rod and the pilot burner assembly causes an adequate spark to ignite the air/fuel mixture in the pilot burner assembly, creating a pilot flame.

Abstract: A burner module for delivering a flow of chemical reactants to a combustion site of a chemical vapor deposition process includes a plurality of substantially planar layers. The substantially planar layers are arranged in a generally parallel and fixed relationship and define an inlet, an outlet and a passage fluidly connecting the inlet and outlet. At least one of the layers is a distribution layer having a plurality of apertures therethrough and fluidly communicating with the passage. The plurality of apertures collectively define a non-uniform pattern arranged and configured to improve the uniformity of a flow out through the outlet. Burner adapter and assembly embodiments are also included.

Abstract: This invention uses a kind of windproof lighter with a flint igniter combined with inflammable gas stored in liquidness as fuel.

Abstract: Disclosed is a high efficiency burner and an apparatus for over-cladding an optical fiber pre-form using the same. The high efficiency burner heating an optical fiber pre-form includes burner covers, burner bodies arranged between the burner covers, and fuel dischargers arranged in at least two rows between the burner bodies, and divided by a partition, respectively.

Abstract: A burner arrangement includes a venturi cluster including a plurality of venturis arranged for parallel flow. The multi venturi arrangement utilizing pressurized fuel as the inducing fluid to induce a flow of air enables the provision of an ultra fuel lean premix of fuel and air. A central burner tube which extends outwardly beyond the delivery end of a primary burner tip and mounts a relatively small capacity nozzle at a substantial distance from the delivery end of the burner tip enabling the ultra fuel lean mixture to expand and slow down such that its linear speed does not exceed the flame speed of the mixture prior to by the flame of the spaced nozzle. A deflector may be positioned adjacent the nozzle to assist in stabilizing the flame after the expansion and slowing process has been completed.

Abstract: A system for feeding a plurality of burners (2a, 2b, 2c, 2d, 2n) includes a manifold (1) into which a flow of gaseous fuel is introduced via an inlet duct (5), said manifold (1) including an hollow body (3) provided with a plurality of outlets (6) each of which can be connected to a respective burner (2a, 2b, 2c, 2d, 2n), said manifold (1) further comprises distributing means (4) for selectively distributing said fuel to said burners (2a, 2b, 2c, 2d, 2n), said distributing means (7) being provided with connecting means (8) with one or more of said outlets (6).

Abstract: The invention concerns a Claus furnace gas burner consisting of at least five concentric tubes (T1-T5), forming five concentric gaps for introducing gas, the first tube (T1) being the tube with the smallest diameter and the fifth tube (T5) being the one with the largest diameter, wherein: the ends on the side of the Claus furnace of the third, fourth and fifth tubes are in the same plane, the two central tubes (T1, T2) are integral relative to each other and mobile along a central longitudinal axis of the burner relative to the other tubes (T3-T5), their ends on the Claus furnace side not exceeding the plane formed by the ends of the three other tubes, the gap formed between the first and second tubes (T1, T2) being terminated on the Claus furnace side by an injector oriented towards the periphery of the burner in the injecting direction of the gases into the burner.

Abstract: A burner apparatus is operated in a plurality of distinct modes. In a startup mode, flows of oxidant and primary fuel are ignited by an igniter and are provided simultaneously with a flow of secondary fuel until a process chamber reaches the auto-ignition temperature of the secondary fuel. In a subsequent mode, flows of oxidant and secondary fuel are provided simultaneously to the exclusion of a flow of primary fuel.

Abstract: A diffuser for a pulverized coal delivery pipe near an elbow connection to a burner nozzle. A diffuser structure is located in the pipe adjacent the elbow outlet, with both radial and axial diffuser elements for diffusing radial and axial components of coal concentrations between the elbow and the nozzle. In a preferred form, the elbow is formed with an access hatch aligned with the pipe at the elbow outlet, and the diffuser structure is formed as a drop-in insert that can be installed and accessed through the hatch. The diffuser has a venturi inlet that produces an initial diffusion effect with minimal pressure drop before the coal flow reaches the radial and axial collision-style diffuser elements.

Abstract: A lighter is provided. The lighter includes two spaced apart nozzles. Upon manual actuation of the lighter, each nozzle produces a separate flame, and the flames intersect to produce a single flame in region spaced apart from the body of the lighter.

Abstract: An atmospheric burner unit for use in an unvented gas log heater has a base and a gas distribution valve supported by the base. The valve has an inlet opening and a number of outlet openings. A plurality of burner elements are mounted by the base. Each of the burner elements has an inlet port and a plurality of outlet ports. The inlet port of each burner element is in proximate spaced relationship with an outlet opening of the gas distribution valve thereby defining open spaces through which gas may flow from the distribution valve to the burner elements thus obviating the use of tubes or other conduits.

Abstract: A low emissions burner includes a diffusion burner surrounded by an annular array of premix burners. The diffusion burner operates at maximum swirl air flow and at a low constant fuel rate to reduce NOx emissions. The diffusion burner provides a stable swirling diffusion flame. An annular array of premix burners surrounds the diffusion burner and provides a non-swirling premix flame about the diffusion flame to advantageously provide a higher heat content about the periphery of the burner flame to facilitate industrial drying processes using the burner. The diffusion burner flame maintains the premixed flame stabilized. Water injection nozzles are provided each of the premix and diffusion burners.

Abstract: A flame atmosphere analyzer is described and comprises a tube, in which an air-gas intake and mixing chamber is defined, a gas-supply nozzle, and primary combustion-air supply means opening into the intake chamber, as well as a flame burner comprising at least one flame jet which is in flow communication with the intake and mixing chamber in order to supply an air-gas mixture formed in the chamber. The primary air-supply means comprise at least one duct which has a first end in flow communication with the intake chamber and which is open at the opposite, second end in order to take in primary combustion air in a position remote and at a predetermined distance from the intake chamber in the tube. A water-heating device including the above-mentioned flame atmosphere analyzer is also described.

Abstract: A biogas flare system for burning biogas generated primarily by a landfill includes at least one burner for igniting a mixture of biogas and air. A main supply line supplies a mixture of biogas and air to the burner. A biogas supply line feeds biogas into the main supply line. An air supply line feeds air into the main supply line. A mixer structure mixes the biogas and air prior to the mixture being supplied to the burner.

Abstract: A relighter apparatus for operating a pilot burner for a fuel pipeline heater. The relighter apparatus has a controller located at a first location, and a pilot burner assembly and ignition coil located at a second location which is remotely located a distance from the first location. The ignition coil is also electrically connected to the controller. The ignition coil receives a low voltage input based on a signal from the controller and provides a high voltage output at the output thereof. Current corresponding to the high voltage output is transferred from the ignitor coil, through a terminal and to an ignitor rod. A conduction of the electrical current between the second end of the ignitor rod and the pilot burner assembly causes an adequate spark to ignite the air/fuel mixture in the pilot burner assembly, creating a pilot flame.

Abstract: A piezoelectric lighter includes a gas emission arrangement including a pair of jet nozzles and a gas emitting tube communicating with a liquefied gas storage respectively, a gas releasable valve extended from the liquefied gas storage for controlling a flow of gas to the gas emission arrangement, a pair of gas ejecting conduits connected from the gas releasable valve to the two jet nozzles respectively, and a gas ejecting duct connected from the gas releasable valve to the gas emitting tube. Therefore, the piezoelectric lighter is adapted for selectively producing either a pair of jet flames at the same time when the gas discharged to the two jet nozzles through the gas ejecting conduits or producing a visible flame when the gas discharged to the gas emitting tube through the gas ejecting duct.

Abstract: A low emissions burner includes a diffusion burner surrounded by an annular array of premix burners. The diffusion burner operates at maximum swirl air flow and at a low constant fuel rate to reduce NOx emissions. The diffusion burner provides a stable swirling diffusion flame. An annular array of premix burners surrounds the diffusion burner and provides a non-swirling premix flame about the diffusion flame to advantageously provide a higher heat content about the periphery of the burner flame to facilitate industrial drying processes using the burner. The diffusion burner flame maintains the premixed flame stabilized. Water injection nozzles are provided each of the premix and diffusion burners.

Abstract: An apparatus and method for operating a pilot burner apparatus and a main burner apparatus of a gas-fired appliance. The pilot burner apparatus draws combustion air from a first environment. The main combustion apparatus draws air from a second environment. In a shutdown condition, such as when a flammable vapor source is accidentally exposed to the second environment, the pilot burner apparatus draws air containing an undesired flammable vapor which eliminates the pilot flame, triggering a gas valve to close and shut down the fuel gas supply to the main burner apparatus and the pilot burner apparatus.

Abstract: A burner has a mixing tube, a side tube, an auxiliary tube and a fire bridge. The auxiliary tube with a diameter smaller than that of the mixing tube is mounted above the mixing tube and is connected to the control valve connected to the mixing tube. Multiple orifices are defined in the top of the auxiliary tube. The fire bridge is connected between the mixing tube and the auxiliary. Multiple orifices are defined in the top of the fire bridge. Accordingly, the flames can be switched between the side tube and the auxiliary tube. With a diameter of the auxiliary tube being small relative to the mixing tube, the flame on the auxiliary tube will not go out even when a small quantity of gas is led into the auxiliary tube. Consequently, the burner can provide a reliable low level heat function.

Abstract: Methods and apparatus for combusting a fuel with an oxidant are described, the apparatus comprising a ceramic burner block, the burner block having a back face and a front face. The burner block has at least one oxidant cavity in an upper portion of the burner block, and at least one fuel cavity in a lower portion of the burner block, each cavity extending from the back face to the front face. The at least one oxidant cavity has positioned therein a fuel supply conduit, the fuel supply conduit having a fuel supply conduit exit positioned a sufficient distance from the front face to allow combustion of at least a portion of fuel exiting the fuel supply conduit exit with at least some of the oxidant traversing the oxidant cavity, and the least one fuel cavity having connected thereto, near the back face, an oxidant conduit, thereby allowing mixing of a minor portion of the oxidant with the fuel.

Abstract: A windproof lighter includes a gas directing arrangement including a torch nozzle, a gas nozzle, and a gas directing unit including a torch directing conduit and a gas directing conduit for directing a flow of gas toward the torch nozzle and the gas nozzle respectively. A gas detouring unit is movably mounted to the casing to block up the flow of gas passing through the gas directing conduit while the torch directing conduit is remained open. An ignition system installed into the casing for producing sparks directed toward the gas nozzle to ignite the gas emitted from the gas nozzle to provide a visible flame, so as to ignite the gas emitted from the torch nozzle to provide a torch flame. Therefore, the lighter is capable of providing the torch and visible flames at the same time and providing only the torch flame while operating the gas detouring unit.

Abstract: A burner head for a gas burner for improved flame stability and burner turndown is positioned in a longitudinally extending blast tube with an open end. The burner head includes a first surface facing in a direction transverse to the longitudinally extending blast tube and toward the open end, a second surface facing a direction transverse to the longitudinally extending blast tube and away from the open end and a third surface extending between the first and second surfaces. A first plurality of gas ports extends through the third surface, and a first passageway extends from the first surface to the second surface and is adapted to allow air to pass therethrough. A flame rod extends through the first passageway and into the flame zone.

Abstract: In the present invention, in a burner apparatus comprising an inner tube (2) defining a second channel (A2) and an outer tube (3) defining a first channel (A1) surrounding the inner tube (2), air supplying means for supplying air to the first channel (A1) and the second channel (A2), and gas supplying means for supplying fuel gas G to the first channel (A1) and the second channel (A2), either the first channel (A1) or the second channel (A2) being used as a main combustion channel and the other being used as a pilot combustion channel, the main combustion channel and the pilot combustion channel receiving the supply of fuel gas (G) for combusting it, said gas supplying means includes a plurality of fluid distributors (4) arranged in dispersion in a peripheral direction of the main combustion channel and the pilot combustion channel, each fluid distributor (4) including a first supply opening (5) for supplying the fuel gas G into the main combustion channel, a supply line (6) for supplying the fuel gas G prese

Abstract: A torch lighter includes a fuel nozzle assembly provided for vaporizing the fuel released therefrom to a high-pressured gaseous fuel to emit to the ignition chamber, wherein the vaporizer assembly includes a torch head, which is provided at an emitting end of a nozzle body and supported within a combustion housing, having a root chamber having a size larger than the size of the emitting end of the nozzle body to form a gas stabilizing reservoir to ensure a collective and stable flow of the mixture gas, and two or more elongated nozzle ducts each having an ignition end and a root end extended to a ceiling of the root chamber, wherein a mixture gas ejected from the two ignition ends is ignited in the ignition chamber to form two torches soaring away from the two ignition ends of the two nozzle ducts.

Abstract: A gas burner operating system includes a control unit installed in the body of a gas burner and connected to an electronic igniter in the body of the gas burner, the operating unit using a cock, a pressure differential device, a medium flowrate control valve and a low flowrate control valve to control the operation of the gas burner and the intensity of the burner flame, and an operating unit provided outside the body of the gas burner for enabling the user to control the operation of the control unit and the electronic igniter of the gas burner at a remote place away from the gas burner.

Abstract: The invention relates to a catalytic burner (1) of a combuster (2), in particular of a power station installation, comprising

Abstract: Improved burner performance is achieved by providing an atmospheric gas burner with a spiral-shaped burner body. A plurality of ports is formed in the burner body so as to be in fluid communication with the burner's internal chamber. Preferably, the burner body includes a substantially cylindrical hub section and an arm section that is joined at one end to the hub section and bends around the hub section.

Abstract: Increased turndown ratio is achieved by providing an atmospheric gas burner having a burner body with a plurality of ports formed therein and a fuel flow divider disposed in the burner body. The fuel flow divider defines a primary fuel chamber and at least one secondary fuel chamber, wherein the secondary fuel chamber is in fluid communication with at least one of the ports and the primary fuel chamber is in fluid communication with the remaining ports. A first mixing tube introduces a fuel-air mixture into the primary fuel chamber, and a second mixing tube introduces a fuel-air mixture into the secondary fuel chamber.

Abstract: Low NOx apparatus and methods for burning liquid and gaseous fuels are provided by the present invention. The apparatus of the invention is basically comprised of a housing having an open discharge end attached to a furnace space, means for introducing a controlled quantity of air into the housing and into the furnace space, a combustion compartment disposed within the housing for providing a primary combustion zone therein having an open inlet end for receiving a portion of the air introduced into the housing and an open discharge end, a liquid fuel nozzle attached to the housing for discharging liquid fuel into the primary combustion zone, at least one primary gaseous fuel nozzle for discharging primary gaseous fuel into the primary combustion zone and at least one secondary gaseous fuel nozzle for discharging secondary gaseous fuel into the furnace space.

Abstract: A burner apparatus is operated in a plurality of distinct modes. In a startup mode, flows of oxidant and primary fuel are ignited by an igniter and are provided simultaneously with a flow of secondary fuel until a process chamber reaches the auto-ignition temperature of the secondary fuel. In a subsequent mode, flows of oxidant and secondary fuel are provided simultaneously to the exclusion of a flow of primary fuel.

Abstract: Methods and apparatus for combusting a fuel with an oxidant are described, the apparatus comprising a ceramic burner block, the burner block having a back face and a front face. The burner block has at least one oxidant cavity in an upper portion of the burner block, and at least one fuel cavity in a lower portion of the burner block, each cavity extending from the back face to the front face. The at least one oxidant cavity has positioned therein a fuel supply conduit, the fuel supply conduit having a fuel supply conduit exit positioned a sufficient distance from the front face to allow combustion of at least a portion of fuel exiting the fuel supply conduit exit with at least some of the oxidant traversing the oxidant cavity, and the least one fuel cavity having connected thereto, near the back face, an oxidant conduit, thereby allowing mixing of a minor portion of the oxidant with the fuel.

Abstract: A high-pressure computer controlled chamber, processing high-temperature combustion gases combining with a vaporizing liquid, to create a high-energy flow to an expansion engine to do variable-rate work.

Abstract: The present application relates to a burner block (1) comprising a base (2), a plurality of hydrocarbon channels (3) for the passage of hydrocarbon/air mixtures used as reactants, and at least one oxygen channel (4) for the passage of air or an air/oxygen mixture. An ignition burner (5) is optionally present. The burner block allows the combustion of hydrocarbons for the preparation of acetylene at temperatures of <1400° C.

Abstract: A burner arrangement includes a venturi cluster including a plurality of venturis arranged for parallel flow. The multi venturi arrangement utilizing pressurized fuel as the inducing fluid to induce a flow of air enables the provision of an ultra fuel lean premix of fuel and air. A central burner tube which extends outwardly beyond the delivery end of a primary burner tip and mounts a relatively small capacity nozzle at a substantial distance from the delivery end of the burner tip enabling the ultra fuel lean mixture to expand and slow down such that its linear speed does not exceed the flame speed of the mixture prior to by the flame of the spaced nozzle. A deflector may be positioned adjacent the nozzle to assist in stabilizing the flame after the expansion and slowing process has been completed.

Abstract: Improved burner performance is achieved by providing an atmospheric gas burner with a spiral-shaped burner body. A plurality of ports is formed in the burner body so as to be in fluid communication with the burner's internal chamber. Preferably, the burner body includes a substantially cylindrical hub section and an arm section that is joined at one end to the hub section and bends around the hub section.

Abstract: A gas burner with multiple gas rings comprising: a burner body (6) mountable underneath a top plate, with a cut-out section, of an appliance and incorporating a first, upwardly directed gas injector (14) and a second gas injector (9) followed by a horizontal tubular Venturi (10) opening into a vertical well (12); an outer burner head (3) seated on the body (6) through the cut-out section and spaced at a distance above the plate and provided with an annular chamber (22) open above the well (12) and having one or two rows of orifices for flames (4,5); and an inner burner head (1) shaped so as to have a radial divergent (37) coaxially supplied by the first injector through a recess located at the center (31) of the head (3), ports being provided in the head (3) so that all the primary air and the secondary air needed to operate the multiple burner arrives from the top of the top plate of the appliance.