Porous, Capillary, Particulate Or Sievelike Flame Holder, E.g., Radiant Surface Burner, Etc. Patents (Class 431/326)
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Patent number: 5370529Abstract: A fuel-fired, forced air draft induced heating furnace is provided with NO.sub.x reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure. In-shot type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NO.sub.x reduction apparatus includes a plurality of metal mesh tubes having diameters substantially less than the internal diameters of the combustion tubes. The mesh tubes are coaxially supported within the combustor tubes, adjacent their inlet ends, by elongated support members longitudinally passing through the mesh tubes and having first ends anchored to the combustor tube inlet ends, and second ends slidably resting on internal side surface portions of the combustor tubes.Type: GrantFiled: August 24, 1993Date of Patent: December 6, 1994Assignee: Rheem Manufacturing CompanyInventors: Lin-Tao Lu, Larry R. Mullens, Keith M. Grahl
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Patent number: 5344312Abstract: An atmospheric gas burner, of the hyperstoichiometric mixture type, of a substantially tubular shape; wherein the mixture is discharged from a series of slots made in the top surface, these slots being arranged in one or more rows running parallel to the burner axis; wherein the width of these slots is such as to guarantee extremely low resistance to the passage of the comburent air/combustible gas mixture.Type: GrantFiled: April 22, 1993Date of Patent: September 6, 1994Assignee: Aldo PolideroInventor: Nicco Polidero
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Patent number: 5328359Abstract: A catalytic reactor serves as the ignition stage for a multi-stage combustor. In one embodiment, the catalytic reactor includes a stack of corrugated metal strips, each strip having a catalyst coating on exactly one side, wherein a coated side of one strip faces an uncoated side of the adjacent strip. Thus, the reactor defines channels each having two walls, exactly one of which bears a catalyst coating. Another embodiment takes the form of a spiral formed by winding two strips, each strip having a catalyst coating on one side. The coated side of one strip faces the uncoated side of the other. Thus, the spiral includes channels having a catalyst coating on only one wall. In still another embodiment, a single strip has bands of coated and uncoated regions on both sides. At any given point on the strip, one side of the strip has a catalyst coating and the other side has no coating.Type: GrantFiled: May 19, 1992Date of Patent: July 12, 1994Assignee: W. R. Grace & Co.-Conn.Inventor: William B. Retallick
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Patent number: 5294406Abstract: An apparatus for treating a waste solution which contains a nonvolatile substance such as a toner used for development of an electrophotographic film and a liquid which is difficult to volatilize at normal temperatures such as isoparaffin. The waste solution heated from below a multiplicity of vertically elongated guide chambers disposed in a waste solution container rises upward through the guide chambers in the form of vapor and is oxidized by a catalyst. After ignition, even if the heating of the waste solution by a heater is stopped, the waste solution in the waste solution container continues to be heated by oxidation heat.Type: GrantFiled: August 27, 1992Date of Patent: March 15, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Masayasu Sekido, Akira Yoda
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Patent number: 5292246Abstract: The present invention provides a burner for a reactor producing synthetic gas for conveying at least two fluids separately to a reaction zone, one serving as fuel and the other as combustive. It comprises a solid element in which are provided holes penetrating to different depths, these holes opening at one of their ends into the reactor and at the other either into fuel supply means or into combustive supply means depending on the fluid conveyed by the hole considered.Type: GrantFiled: August 4, 1992Date of Patent: March 8, 1994Assignee: Institut Francais du PetroleInventors: Paul Gateau, Michel Maute, Alain Feugier
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Patent number: 5263852Abstract: A fireplace gas burner unit is provided which allows for excellent aeration and distribution of the combustion gas without excessive gas flow noise. The burner includes a typical open-topped container box with triangular sides. A perforated burner pipe is disposed horizontally within the container box, with the perforations angled slightly towards the front of the box. A deflector plate is attached across the top of the burner pipe and is slanted forward and downwardly to form a narrow slit near the front of the container box. The narrow slit has a long central section and opposing periphery sections. The central section has a greater opening height than the periphery sections.Type: GrantFiled: April 15, 1992Date of Patent: November 23, 1993Inventor: Robert Beck
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Patent number: 5259754Abstract: This invention is a catalyst comprising palladium on a support containing zirconium and a partial combustion process in which the fuel is partially combusted using that catalyst. The choice of catalysts and supports solves a problem dealing with the long term stability of palladium as a partial combustion catalyst. The catalyst structure is stable in operation, has a comparatively low operating temperature, has a low temperature at which oxidation begins, and yet is not susceptible to temperature "runaway". The combustion gas produced by the catalytic process typically is at a temperature below the autocombustive temperature and may be used at that temperature or it may be fed to other combustion stages for further use in a gas turbine, furnace, boiler, or the like.Type: GrantFiled: November 26, 1990Date of Patent: November 9, 1993Assignees: Catalytica, Inc., Tanaka Kikinzoku Kogyo K.K.Inventors: Ralph A. Dalla Betta, Kazunori Tsurumi, Toru Shoji, Robert L. Garten
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Patent number: 5249956Abstract: An improved multi-fuel heater using a porous fuel vaporizer in close proxty to an burner cup the improved heater having means to ameliorate the build up of particulate material between the cup and the vaporizer.Type: GrantFiled: December 4, 1992Date of Patent: October 5, 1993Assignee: The United States of America as represented by the Secretary of the ArmyInventor: William H. Chu
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Patent number: 5248255Abstract: The present invention enables a tile or other ceramic wares to have a deep reduced color. A roller hurse kiln 210 includes rollers 214, and a burner mounted in a firing zone adjacent to the outlet so as to provide a reducing gas. The burner has gas injection holes. The injection holes may be circular holes having a diameter of 1 to 5 mm or may be in the form of a slit having a width of 1 to 5 mm. The burner is located 15 to 80 mm above a material to be fired.Type: GrantFiled: June 8, 1992Date of Patent: September 28, 1993Assignee: Inax CorporationInventors: Toshimichi Morioka, Yaushisa Hirano, Akira Iwahashi, Masataka Matsuo, Kazuyoshi Kurayoshi, Akio Ishii
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Patent number: 5232358Abstract: A combustion apparatus comprises: a large-diameter sleeve-like element forming an incoming passage through which an air/fuel mixture gas flows in a predetermined direction; at least one small-diameter sleeve-like element disposed in the incoming passage, which small-diameter sleeve-like element forms an outgoing passage through which a combustion gas having been issued from the incoming passage flows in a direction counter to the above predetermined direction; an air/fuel mixing unit for issuing the air/fuel mixture gas under a predetermined pressure to a main incoming port located in an upstream side of the incoming passage; an auxiliary incoming unit for issuing a combustion gas produced by a pilot burner to the upstream side of the incoming passage prior to supplying the air/fuel mixture gas to the incoming passage; and a combustion-gas outlet port for discharging the combustion gas having passed through the outgoing passage, which combustion-gas outlet port communicates with an outlet opening of the outgoType: GrantFiled: March 13, 1992Date of Patent: August 3, 1993Assignee: Nippon Chemical Plant Consultant Co., Ltd.Inventor: Saburo Maruko
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Patent number: 5218952Abstract: This invention describes a radiant heating unit, which can be used with a scarifier or patcher. The heating unit system is comprised of a supply means used for supplying a quantity of gaseous fuel at a predetermined pressure, a housing, and a layer of ceramic fiber with a mesh retaining layer on the upper and lower side thereof. A fuel-air mixture system is located in an upper aperture of the housing, which provides a combustible mixture to the housing chamber. This combustible mixture is eventually burnt at the bottom outer surface of the ceramic fiber layer to provide a hot radiant heating surface.Type: GrantFiled: August 14, 1992Date of Patent: June 15, 1993Inventor: Allen A. Neufeldt
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Patent number: 5215457Abstract: The process obtains a plurality of small flames which become violet when combusting natural gas. In particular the amount of primary air induced is at least 80% of the air stoichiometrically required for combustion; the secondary air laps all sides of each singly small flame arising from the small group of slots on the burner body, in the area where each flame leaves the surface of the burner body so as to swell it making its width at least as big as its height and/or alternatively the contact surface between each flame and the secondary air is increased right from the first steps in combustion, so that each small group creates a small flame with two divergent bladed wings, similar to "butterfly wings.Type: GrantFiled: January 24, 1990Date of Patent: June 1, 1993Assignee: Worgas Bruciatori S.r.l.Inventor: Enrico Sebastiani
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Patent number: 5203690Abstract: A combustion apparatus comprises: a large-diameter sleeve-like element forming an incoming passage through which an air/fuel mixture gas flows in a predetermined direction; at least one small-diameter sleeve-like element disposed in the incoming passage, which small-diameter sleeve-like element forms an outgoing passage through which a combustion gas having been issued from the incoming passage flows in a direction counter to the above predetermined direction; an air/fuel mixing unit for issuing the air/fuel mixture gas under a predetermined pressure to a main incoming port located in an upstream side of the incoming passage; an auxiliary incoming unit for issuing a combustion gas produced by a pilot burner to the upstream side of the incoming passage prior to supplying the air/fuel mixture gas to the incoming passage; and a combustion-gas outlet port for discharging the combustion gas having passed through the outgoing passage, which combustion-gas outlet port communicates with an outlet opening of the outgoType: GrantFiled: December 23, 1991Date of Patent: April 20, 1993Assignee: Nippon Chemical Plant Consultant Co., Ltd.Inventor: Saburo Maruko
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Patent number: 5203689Abstract: A gas boiler having a boiler unit constructed by interconnected boiler sections each having an internal waterway bounded by one or more heat transfer surfaces. Baffles on the boiler sections define serpentine flue passages, and the baffles include bypass openings formed by notches and/or slits to suppress standing waves and associated noise. A burner includes a conical burner element having burner ports arranged in clusters to enhance the flame distribution and stability. A distributor cone nested within the burner element provides a pressure drop for noise suppression. The blower shaft is equipped with a magnetic plastic washer which effects a seal against air infiltration while allowing the blower shaft to shift from side to side.Type: GrantFiled: November 15, 1991Date of Patent: April 20, 1993Assignee: The Marley CompanyInventors: Robert B. Duggan, James V. Goins, Donald E. Holloway, Ronald Moulder
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Patent number: 5197871Abstract: A vaporizing type burner including a cylindrical body, a combustion chamber, a fuel absorbing section for receiving a fuel therein and vaporizing the received fuel therefrom, a mixer tube in which a vaporized fuel and a combustion air are mixed with each other to prepare a mixture gas and an igniting plug for igniting the mixture gas radially ejected from the mixer tube wherein a supporting member for accommodating the fuel absorbing section in the cylindrical body is arranged in such a manner as not to allow the fuel absorbing section to be exposed directly the combustion chamber, a vaporizing chamber is arranged adjacent to the fuel absorbing section and the supporting member so as to allow a part of the combustion gas generated in the combustion chamber to be introduced into the vaporizing chamber without any burning flame, an air swirling chamber includes a plurality of guide plates for imparting a swirling force to the combustion air, the mixer tube is communicated not only with the air swirling chamberType: GrantFiled: June 25, 1992Date of Patent: March 30, 1993Assignee: Mikuni Kogyo Kabushiki KaishaInventors: Yuuzou Yamamoto, Katsuji Sawada, Hisashi Fukunaga
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Patent number: 5174744Abstract: A block-like curtain of reticulated ceramic foam is spaced forwardly of the burner nozzle of an industrial burner and, when heated by the flame of the burner, oxidizes unburned CO into CO.sub.2 to reduce the emissions of CO. By virtue of the curtain reducing the CO emissions, the burner may operate with a slower, longer and lower temperature flame so as to reduce NO.sub.x emissions. The curtain may be adjusted toward and away from the burner nozzle in order to correlate the position of the curtain with the length of the flame.Type: GrantFiled: November 1, 1991Date of Patent: December 29, 1992Assignee: Gas Research InstituteInventor: Shyam N. Singh
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Patent number: 5165887Abstract: An infrared heater for a fluid immersion apparatus such as a commercial deep fat fryer includes a burner whose burner element is made from woven ceramic fibers, preferably formed as a cloth. The burner can also include a wire mesh or screen for supporting the cloth; alternatively, the cloth can be made self-supporting through the wrapping or affixing of several cloth layers together. The burner element possesses a predetermined gas permeability adequate to avoid any significant backflash during the use of the burner. The gas permeability is selected to match the flow rate, composition and backpressure of the selected gas, and takes into account the insulative capacity of the fiber weave employed. The resulting burner construction is substantially more durable and resistant to damage during replacement or inspection than are burners having conventional ceramic elements, such as foams, felts, or the like.Type: GrantFiled: September 23, 1991Date of Patent: November 24, 1992Assignee: SolaronicsInventor: Farshid Ahmady
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Patent number: 5160254Abstract: Apparatus for controlled low NO.sub.x combustion. First and second combustion zones are provided, each filled with a porous high temperature resistant matrix, the void spaces of which provide sites at which substantially all of the combustion occurs. The second zone is downstream of the first zone. Means are provided for mixing fuel and a gaseous source of oxygen and providing the resultant combustible mixture to the input end of the first combustion zone to establish fuel-lean conditions therein; and means for feeding the combustion products from the first zone to the second zone and augmenting same with further oxygen and sufficient additional fuel to create fuel-rich burning conditions therein to complete the oxidation of the products from the first zone.Type: GrantFiled: October 4, 1991Date of Patent: November 3, 1992Assignees: Radian Corporation and the Board of Regents, The University of Texas SystemInventors: Ronald D. Bell, William C. Gardiner, John R. Howell, Ronald D. Matthews, Steven P. Nichols
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Patent number: 5152685Abstract: This burner comprises a gas distributor (20) with a row of gas injectors (5a to 5e), the tube being axially inside an air distributor tube. Each gas injector extends through the wall of the air distributor tube via a coaxial air outlet aperture. The gas distributor tube includes two sealing bodies (36, 37) sliding symmetrically on either side of a central gas inlet aperture (21). Each of these bodies is provided with an eccentric longitudinal threaded bore (38, 39) engaging a threaded section of a rotating control rod (41). The two sections (48, 49) are threaded in opposite directions to the thread of the sealing bodies (36, 37), which enables them to move these two sealing bodies simultaneously in order to gradually interrupt or restore the supply of gas to the injectors (5a to 5e) situated at the end of the row without interrupting the supply to the air injectors.Type: GrantFiled: July 2, 1991Date of Patent: October 6, 1992Inventor: Michel Coulon
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Patent number: 5147201Abstract: A radiant gas burner having a porous matrix bed with a cross-sectional area that diverges along a generally longitudinal axis in a direction from an upstream end to a downstream end of the porous matrix bed. The burner has a fuel/air inlet and a flow distributor positioned near a downstream end of the fuel/air inlet, for distributing the fuel/air mixture throughout the porous matrix bed. A radiant surface layer is positioned adjacent and downstream from the downstream end of the porous matrix bed. The fuel/air mixture is combusted within the porous matrix bed and a combustion flame is stabilized completely within the porous matrix bed. The porous matrix bed is constructed as a bed of refractory particles.Type: GrantFiled: November 19, 1990Date of Patent: September 15, 1992Assignee: Institute of Gas TechnologyInventor: Tian-Yu Xiong
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Patent number: 5137445Abstract: An improved multifuel heater having a means to provide a source of particte free combustion air to a fuel ignition chamber.Type: GrantFiled: October 11, 1991Date of Patent: August 11, 1992Assignee: The United States of America as represented by the Secretary of the ArmyInventor: William H. Chu
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Patent number: 5133657Abstract: A sheet metal atmospheric gas burner capable of a 5:1 turndown ratio is disclosed. The burner is intended for application in instantaneous water heaters and other gas burning appliances having high input modulation requirements. It has a hollow cylindrical burner head fabricated of sheet metal, a single mixer tube, and slotted ports arranged on the vertically-oriented cylinder sidewall. The unique features of the burner are the tabbed slotted port design, the use of fins adjacent to port rows to eliminate flame blowoff and assure quiet burner operation, and the arrangement of ports on the burner head to simultaneously provide good secondary aeration at all inputs and flame carry to all ports at all inputs. The advantages of the burner are its simplicity, low cost, and ease of manufacture, relative to its demanding performance requirements.Type: GrantFiled: June 17, 1991Date of Patent: July 28, 1992Assignee: Harmony Thermal Co. Inc.Inventor: James A. Harris
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Patent number: 5122054Abstract: The invention provides a device for shutting off a gas or air/gas mixture supply port of a radiant burner so as to cause it to stop automatically in the event of ignition at the rear, this device being of the type comprising a deformable temperature-detecting part, the deformation of which brings about the movement of a shut-off part intended for shutting off the port in the event that a specific temperature is detected, wherein the detection part is arranged in the distribution chamber of the radiant burner.Type: GrantFiled: November 21, 1990Date of Patent: June 16, 1992Assignee: Solaronics VaneeckeInventors: Patrick Debacque, Gabriel Coppin
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Patent number: 5111803Abstract: A flare reduction buffer to be situated between a burner element and a grill in a gas barbecue to provide even heating in the barbecue and reduce flare-up during cooking. The buffer comprises a plate having an upper and lower surface, made of impervious heat resistant material and formed with a plurality of pockets spaced from each other in regular fashion over the plate. The pockets each have an entrance, side walls and bottom being oriented so that their entrances open towards the lower surface, perforations being provided in the plate in the bottoms of the pockets.Type: GrantFiled: July 3, 1991Date of Patent: May 12, 1992Assignee: Barbecue Innovations IncorporatedInventors: James Barker, Vern Maller
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Patent number: 5090898Abstract: Gas-fired burner having porous ceramic face through which gaseous combustion mixture emerges and on the emerging surface of which the mixture burns, can heat substrate with help of streams of air or recycled combusted gas sweeping across substrate to help remove moisture or other volatiles being driven from substrate. Burner body can have pilot ignition compartment. Ceramic face can be large ceramic fiber mat the back of which is supported to burner body back. Combustion mixture can be controlled to essentially stoichiometric. Aligned row of closely spaced burners each with a generally rectangular radiant face extending to its side-walls, can have strips of compressible material squeezed into place between the burner side-walls to minimize penetration of hot combusted gases. Side-walls may be inclined to provide a wedging action against the compressible strips.Type: GrantFiled: October 20, 1989Date of Patent: February 25, 1992Inventor: Thomas M. Smith
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Patent number: 5090899Abstract: An all-primary type gas burner which achieves exceptional heating capacity with a small combustion surface. The burner comprises a ceramic radiation plate, mixed gas distributors, a burner main body, upper and lower laterally extending supporting base plates, gas mixing tubes, Venturi-tubes, an air control plate, air control disks, and nozzles. The ceramic radiation plate broadly disperses combustion heat in all directions. It comprises a large number of ceramic rectangular tubes of varying lengths arranged so as to form a semi-cylinder projecting from the burner main body. At the tip of each tube is a gas blowing hole. The diameter at the bottom of the semi-cylinder is greater than that at the top. The mixed gas distributors uniformly distribute mixed gas so that it blows out all of the gas blowing holes with approximately uniform gas pressure. The mixed gas distributors each have a large number of gas distributing holes.Type: GrantFiled: November 13, 1989Date of Patent: February 25, 1992Assignee: Samsung Electronics Co., Ltd.Inventor: Heui-Tae Kee
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Patent number: 5088918Abstract: A vaporization burner for a heater operated with liquid fuel, in particular an auxiliary vehicle heater with a support that projects into a combustion chamber and on whose front side facing the combustion chamber an absorbent body is located that is supplied with fuel by a fuel feed pipe and on whose back side there is connected an ignition chamber that contains an igniter, for which a passage to the combustion chamber is provided in the support. To achieve improved combustion performance, especially in the start-up phase, with even fuel and heat distribution over the absorbent body, according to a preferred embodiment, a perforated disk is placed between the support and the absorbent body that has a through-hole in the area of a passage in the support and also has a slot-shaped notch which runs from the through-hole up the the edge of perforated disk.Type: GrantFiled: February 4, 1991Date of Patent: February 18, 1992Assignee: Webasto AG FahrzeugtechnikInventors: Klaus Schaale, Wolfgang Engelhardt
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Patent number: 5088919Abstract: The invention relates to a burner membrane (1) for radiant burner comprising a porous sintered web of inorganic fibres that are resistant to high temperatures, wherein at least the membrane surface (3) opposite from the fuel supply side (2) has been provided with grooves (4) in the shape of a grid and which grooves bound the meshes (5) of the grid. Preferably, the meshes are regular polygons with a surface area of between 4 and 400 mm.sup.2. The porosity is between 70% and 90% and the permeability variation over its surface is less than 25%.Type: GrantFiled: March 15, 1990Date of Patent: February 18, 1992Assignee: N. V. Bekaert S.A.Inventors: Roger De Bruyne, Ronny Losfeld
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Patent number: 5085579Abstract: A forced draft gas burning water and/or space heater having a screen type vertically extending tubular burner provided with a deflector plate supported transversely within the burner tube for free vertical sliding movement therein on a vertical extending guide rod mounted in the burner tube. At the outset of each heating cycle of the heater, the pressurized combustible gas/air mixture initially forced upwardly into the open lower end of the burner tube pushes the deflector plate upwardly therein along the guide rod and is deflected thereby laterally outward through the apertured screen wall of the burner tube into the bottom region of the combustion chamber of the heater to cause immediate ignition of the initial combustible gas/air mixture by the igniter means located within the combustion chamber and eliminate any sputtering ignition effect.Type: GrantFiled: March 25, 1991Date of Patent: February 4, 1992Assignee: Mor-Flo Industries, Inc.Inventors: Henry J. Moore, Jr., Bijan Gidanian
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Patent number: 5062788Abstract: A high efficiency linear gas burner assembly having a mixture manifold assembly for delivering a combustible gas and air mixture to a burner. The mixture manifold assembly supports an elongate, channel-shaped, secondary air plenum which receives therein a burner housing. The burner housing supports two, spaced, parallel plates, each having apertures therethrough. The gas/air mixture is delivered through the mixture manifold assembly and secondary air plenum to the burner housing where the mixture passes first through the apertures of the lower plate, then between the plates, then through the apertures of the upper plate or burner surface. The size and number of apertures in the upper plate and the space between the plates ensures that the flame remains stable during a wide range of turndown, and that the flame does not retrogress through the burner apertures. Secondary air ports are provided along the interior of the secondary air plenum to provide additional air for combustion.Type: GrantFiled: January 24, 1991Date of Patent: November 5, 1991Assignee: Haden-Schweitzer CorporationInventor: Willie H. Best
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Patent number: 5057007Abstract: A low NO.sub.x atmospheric gas burner is provided, which includes at least one burner tube having a plurality of gas outlet orifices terminating in a burner bed, and a plurality of plates disposed above the burner tube within the reach of the flame, which plates lower the temperature and effect a stepped combustion. According to the invention, the plates extend parallel to, and on opposite sides of, the orifices provided in the burner tube, and the orifices are arranged in a line parallel to the burner axis. The plates are connected direct to the burner tube substantially throughout the entire length of their lower edges.Type: GrantFiled: October 16, 1989Date of Patent: October 15, 1991Assignee: Remeha FabriekenInventors: Willem W. Andringa, Terence A. Devlin, Hermanus J. Meuleman
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Patent number: 5046944Abstract: Gas-fired burner having porous ceramic face through which gaseous combustion mixture emerges and on the emerging surface of which the mixture burns, can heat substrate with help of streams of air or recycled combusted gas sweeping across substrate to help remove moisture or other volatiles being driven from substrate. Burner body can have pilot ignition compartment. Ceramic face can be large ceramic fiber mat the back of which is supported to burner body back. Combustion mixture can be controlled to essentially stoichiometric.Type: GrantFiled: March 28, 1989Date of Patent: September 10, 1991Inventor: Thomas M. Smith
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Patent number: 5017129Abstract: A porous ceramic gas burner constructed from ceramic blocks associated with each other to form a hollow chamber to receive naturally aspirated gas and air mixture from a venturi with the ceramic blocks including a plurality of small holes enabling passage of the gas and air mixture to the outer periphery of the burner for ignition and combustion with the structural characteristics of the small holes preventing flashback of the flames even though the velocity of the air and gas mixture is less than the flame propagation rate thereby reducing the noise level of the burner by reducing the velocity of the air mixture passing through the burner. The burner is associated with a forced air heater including a fan and a duct associated therewith to direct forced secondary air over the periphery of the burner with the periphery of the burner including a surface generally parallel to the flow path of the secondary air and the holes in the burner being perpendicular to the flow path of the secondary air.Type: GrantFiled: February 6, 1990Date of Patent: May 21, 1991Assignee: Scheu Manufacturing CompanyInventors: Wallace W. Velie, William T. Lewis, Donald C. Haney
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Patent number: 5006498Abstract: An artificial stone wick material for a burner which comprising SiO.sub.2 7-21 weight percent, Al.sub.2 O.sub.3 2-5 weight percent, Fe.sub.2 O.sub.3 1-3 weight percent, CaO 50-27 weight percent, MgO 0.5-3 weight percent, K.sub.2 O 0.5-3 weight percent, Na.sub.2 O 0-2 weight percent, and TiO.sub.2 0-2 weight percent, and processes for preparing the artificial stone wick from the raw materials of clay, portland cement, and zeolite are disclosed.Type: GrantFiled: April 21, 1989Date of Patent: April 9, 1991Inventor: Kwang-Shick Kim
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Patent number: 4976609Abstract: A flashback inhibiting fuel fired infrared burner has a housing with a base wall, a side wall section extending outwardly from the base wall periphery, and a side opening positioned opposite the base wall. Retained in and covering the housing side opening is a foranimous burner plate structure. An air-fuel mixture supply pipe extends forwardly into the housing interior through a front end of the side wall section into a rear end portion of the housing interior and has an open outlet end. A discharge end portion of the supply pipe is received in an open front end portion of a flow reversing tube having a closed rear end. The supply pipe and flow reversing tube are laterally shrouded within the housing by an elongated baffle member having outlet openings formed in longitudinally extending front and rear wall portions thereof, the total cross-sectional area of the outlet openings in the front longitudinal wall portion being greater than that of the outlet openings in the rear longitudinal wall portion.Type: GrantFiled: December 8, 1988Date of Patent: December 11, 1990Assignee: The Frymaster CorporationInventors: James T. Grob, Richard N. Caron
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Patent number: 4964797Abstract: The heater includes a jacket unit connectable to the cooling system of an internal combustion engine, the jacket unit forming a central cavity in which a catalytic burner unit is suspended by means of a bolt that extends upwardly through an upper opening in the jacket unit. Overlying the jacket unit is a perforated dome-shaped cap having a hole through which the bolt extends so that a nut applied to the upper end of the bolt clamps the perforated cap against the upper end of the jacket unit, at the same time suspending the burner unit within the jacket unit's cavity. Within the cavity is a fixedly positioned ring through which the bolt extends, the bolt having a collar that abutts the underside of the ring when the nut is fully tightened. The catalytic burner unit also includes a feed tube extending downwardly therefrom. A second perforated dome-shaped cap underlies the jacket unit having a hole through which the feed tube extends. A sleeve of catalytic material is included in the burner unit.Type: GrantFiled: August 12, 1988Date of Patent: October 23, 1990Inventor: Chester W. Hilton
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Patent number: 4960378Abstract: The gas burner comprises a mixer, a conical transition member adjacent thereto on which a cylindrical burner shell with openings and whose top is closed by a burner lid is mounted. Clamped between the burner lid and the transition member is a throttling cylinder which is filled by the super-stoichiometric gas mixture at super-atmospheric pressure. In order to avoid burner pulsations the cylinder has throttling openings whose total area is 2 to 10% of the total area of the openings. The throttling openings are in a plurality of circular rows above one another in such a manner that they are on a respective vertical line. Vertical, imperforate sections of the burner shell are opposed to the lines so that the mixture jets from the throttling openings do not impinge directly on the openings. The cylinder is provided at a coaxial spacing of 5 mm from the burner shell.Type: GrantFiled: September 23, 1988Date of Patent: October 2, 1990Assignee: Ruhrgas AktiengesellschaftInventors: Theo Jannemann, Hans Berg
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Patent number: 4938685Abstract: Process and apparatus for catalytic combustion in which a combustible gas stream is mixed with part of the recycled hot product stream and then fed to a combustion zone containing a combustion catalyst, and from which the hot pressurized product is obtained. The recycle is preferably effected by means of a constriction at the end of the inlet gas supply producing a region of lower pressure than the pressure of the product gas.Type: GrantFiled: April 13, 1988Date of Patent: July 3, 1990Assignee: Imperial Chemical Industries PLCInventors: Kim P. A. Noakes, Peter J. Davidson
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Patent number: 4934927Abstract: A series of perforated plates are placed in alignment with a horizontally sposed burner tube and canted to spread the flame from the burner both axially and transverse the axis of the tube. Each perforation is accompanied by an upper scoop that extends downward and toward the tube to direct some of the upward flowing flame through the perforation. Thereby, the flame is spread in both length and width to cover a larger grating surface above the tube.Type: GrantFiled: June 22, 1989Date of Patent: June 19, 1990Assignee: The United States of America as represented by the Secretary of the NavyInventor: Edmund Swiatosz
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Patent number: 4917599Abstract: A combustible gas burner having simple, effective safety features. The burner head is made of ceramic to provide insulation between the flame and the gas inlet, thereby preventing autoignition. The ceramic head is formed with a multiplicity of passages therethrough, which are sufficiently small to function as a flame arrester. This multiple passage structure also functions to reduce flame-out when a lean combustible gas mixture is subject to external dilution air. The ceramic burner head is secured to the gas inlet opening by means of a bonding agent which expands as it cures, thereby providing a positive mounting.Type: GrantFiled: December 29, 1988Date of Patent: April 17, 1990Inventor: Detley E. M. Hasselmann
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Patent number: 4915621Abstract: A gas burner comprising a heating gas pipe, the wall of which is traversed by at least one group of longitudinally arranged outlet nozzles. These groups of nozzles (2 or 3) are connected with at least one conduit (5) for a heat accumulating agent which is parallel to the heating gas pipe (1).Type: GrantFiled: August 20, 1987Date of Patent: April 10, 1990Assignee: Joh. Vaillant GmbH und Co.Inventors: Jurgen Schilling, Thomas Pieper
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Patent number: 4883423Abstract: An infrared burner with an extremely low pressure drop is described. The burner comprises a corrosion resistant mesh screen having a thick porous coating of ceramic fibers deposited thereon. In addition to a low pressure drop the burner has structural integrity and ability to generate radiant energy at a high rate. The burner is produced by admixing alumina and ceramic fibers with a clathrate-forming halocarbon material which is removed upon drying.Type: GrantFiled: May 8, 1989Date of Patent: November 28, 1989Assignee: Carrier CorporationInventor: Alex Holowczenko
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Patent number: 4878837Abstract: An infrared burner with an extremely low pressure drop is described. The burner comprises a corrosion resistant mesh screen having a thick porous coating of ceramic fibers deposited thereon. In addition to a low pressure drop the burner has structural integrity and ability to generate radiant energy at a high rate. The burner is produced by admixing ceramic fibers with a polymeric material which burns off upon heating.Type: GrantFiled: February 6, 1989Date of Patent: November 7, 1989Assignee: Carrier CorporationInventor: Nancy M. Otto
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Patent number: 4875850Abstract: 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.Type: GrantFiled: November 2, 1987Date of Patent: October 24, 1989Assignee: Gaz de FranceInventors: Francois Cagnon, Denis Di Paola, Georges Austruy, Andre Vinchon
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Patent number: 4865543Abstract: Improved combustion of liquid fuel is achieved with a porous fiber burner by forming a mixture of the vaporized fuel and all of the desired combustion air sufficiently heated to prevent condensation of the vaporized fuel, and introducing the heated mixture into the porous fiber burner to effect flameless combustion on the outer surface of the burner. The resulting surface combustion produces a high proportion of radiant heat and increased thermal efficiency while suppressing the formation of nitrogen oxides and other pollutants in the flue gas. Periodically, fuel gas may be supplied to the same porous fiber burner.Type: GrantFiled: May 31, 1988Date of Patent: September 12, 1989Inventor: Paul W. Garbo
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Patent number: 4850859Abstract: An apparatus for heating air using a regenerable hydrogen containing liquid fuel. The apparatus includes a hydrogen reduction catalyst, a semipermeable membrane through which hydrogen may pass and an oxidation catalyst which forms a combustion area. The hydrogen reduction catalyst is proximate to the combustion area. A displacement means transfers the hydrogen containing liquid fuel to the reduction catalyst where combustion heat decomposes the liquid fuel into hydrogen and decomposition products. The hydrogen passes through the semipermeable membrane mixes with air and is combusted at the oxidation catalyst. The decomposition products are transferred to a condensing means whereby they are condensed.Type: GrantFiled: September 30, 1988Date of Patent: July 25, 1989Assignee: United Technologies CorporationInventors: Arthur S. Kesten, H. Ezzat Khalifa
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Patent number: 4848318Abstract: A cooking apparatus having a frypot or assembly for heating a quantity of cooking oil including well center section arranged to have enclosed burner assemblies disposed on each side of the center section and forming combustion chambers for the combustion of a fuel-air mixture introduced into combustion chambers under a forced air flow system. The combustion chambers are charged with a forced flow of a fuel-air mixture under positive pressure by a blower assembly mounted on a manifold on the front of the frypot assembly. The manifold includes respective air flow control valve gates which may be selectively adjusted to balance the charging air flow to the respective burner assemblies. The frypot has opposed sidewalls and a rear wall which form parts of respective flow passages for combustion gases leaving the combustion chambers.Type: GrantFiled: April 25, 1986Date of Patent: July 18, 1989Assignee: The Frymaster CorporationInventor: Edward L. Brewer
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Patent number: 4838241Abstract: A burner assembly suitable for use in the fireplace is shown. The burner is operative with either natural gas or propane gas to produce a flame pattern closely resembles to that of a natural wood log fire yet there is virtually no formation of carbon monoxide gas in the exhaust.Type: GrantFiled: August 5, 1988Date of Patent: June 13, 1989Inventor: Heinz H. Rieger
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Patent number: 4751914Abstract: An improved burner for heating water in a hot water system is provided. This burner includes an inlet tube having flared ends and a constricted middle portion to provide an increased amount of air into the barrier. The burner also includes a barrel which communicates with the inlet tube to receive fuel gas and air from it. It vents this air and fuel gas mixture through a large number of ports formed through its sidewalls and arranged in a predetermined pattern to produce a continuous combustion layer when the user ignites the venting mixture. These ports have a width substantially smaller than their length and they produce small, nonluminous, bluish flames which form the combustion layer. This combustion layer burns hot to raise the temperature of the barrel segments surrounding the ports to a level at which the segments glow red and emit infrared heat.Type: GrantFiled: January 8, 1987Date of Patent: June 21, 1988Assignee: Ecodyne CorporationInventor: Barry N. Jackson
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Patent number: 4747781Abstract: The specification describes a system for initiating and promoting combustion of fuels such as wood, coal, oil, etc. Virtually complete combustion is achieved by feeding combustion air under pressure through openings in a diffuser plate with the diameter of the openings having a calculated size and spacing therebetween. By-products of primary combustion are burned by the system. The specification also describes an exemplary wood stove and a cooking unit which utilizes the novel combustion principle.Type: GrantFiled: November 19, 1986Date of Patent: May 31, 1988Inventor: Jean-Pierre Patenaude