Abstract: A portable biomass stove includes a tubular seat unit and an insulation unit. The tubular seat unit includes an inner tubular seat and an outer tubular seat. The outer tubular seat surrounds the inner tubular seat, cooperates with the inner tubular seat to define an internal space therebetween, and is formed with an air inlet located under the tubular body. A top end portion of the outer tubular seat is connected to a top end portion of the tubular body in a sealing contact manner. The insulation unit is disposed in one of the internal space and an ambient space outside the outer tubular seat so as to prevent dissipation of heat out of the outer tubular seat.

Abstract: A stove, using biomass pellets as fuels, includes: a stove body that includes a firebox; at least one hopper; and at least one feed tube extending between the at least one hopper and the firebox; and at least one control lever laterally disposed on the at least one feed tube; wherein, fuels within the at least one hopper enter the firebox along the at least one feed tube under gravity when the at least one control lever is in a second position.

Abstract: A solid cooking fuel starter having a cylindrical wall defining an interior of a cylinder, and a baffle dividing the interior of the cylindrical wall into upper and lower chambers. A first plurality of apertures is defined in the baffle and a second plurality of apertures is defined through the cylindrical wall into the lower chamber. A ratio of a width of the upper chamber to a height from the baffle to a top of the cylindrical wall, may be greater than about 1.69 to 1.

Abstract: A portable biochar kiln and system is disclosed. An example of a portable biochar kiln system includes a kiln body. A ridge is provided around an outside perimeter of the kiln body. A removable lid is provided to cover and uncover an opening in the top of the kiln body. An edge is provided around an outside perimeter of the removable lid. The example portable biochar kiln system also includes a gripper attachment for heavy machinery. The gripper attachment is configured for engagement with the ridge to raise and lower the kiln body. The gripper attachment is also configured for engagement with the edge of the lid to cover and uncover the kiln body.

Abstract: A combustion furnace includes an inner shell, an outer shell, a gas inlet piping and a flame inhibiting cover. The inner shell defines a receiving cavity therein. The inner shell defines a plurality of first gas holes around the periphery of a top portion thereof. The inner shell defines a gas inlet hole at a bottom thereof. The outer shell encloses the inner shell such that a gas flowing space is defined between the inner shell and the outer shell. The gas inlet piping has an opening formed at one end thereof, and the gas inlet piping communicates with the gas flowing space. The flame inhibiting cover is atop the outer shell and the inner shell, and a lower flange of the flame inhibiting cover is below the first gas holes.

Abstract: According to embodiments of the present invention, a pellet stove includes a firepot assembly with a bottom plate slideable along rails to move between a closed position during combustion in the firepot and an open position during ash removal. According to other embodiments, a firebox or combustion enclosure includes a plurality of airfoils formed on the inner and outer surfaces of the enclosure to facilitate heat exchange between exhaust gases flowing across the inner surface of the enclosure and air blown across the outer surface of the enclosure. According to some embodiments, the airfoils and enclosure are of integral unibody construction. According to yet other embodiments, a user sets parameters via a wall control unit, and a stove control unit receives the parameters and automatically controls fuel feed rate, ignition, convection blower, combustion blower, and/or firepot cleaning based on the one or more parameters.

Abstract: The invention relates to a burner for solid fuel containing a space for a solid fuel to be burned, in which solid fuel space the flow of gas is arranged to be possible. The burner comprises at least one fire pipe (3,13) inside the solid fuel space, through the wall of which a possibility for gas flow is arranged.

Abstract: A biomass stove includes a housing enclosing a firebox that defines a ceiling portion opposite a bottom, a firepot disposed within the firebox, an air intake assembly coupled to the firebox, and at least one duct disposed entirely inside the firebox and extending between the ceiling portion of the firebox and the air intake assembly. The duct(s) provide a heat exchanging flow path for ambient air entering the air intake assembly, where the ambient air is heated within the duct(s) prior to exiting through the ceiling portion of the biomass stove.

Abstract: To enable a burnpot for a corn burning stove to be continuously operated, the burnpot has an openable bottom with at least a first and second position, one of said at least fist and second positions being substantially closed to enable a body of combustible fuel to burn on its upper surface, the other of said at least first and second positions providing an opening, burnpot side wall portions and a top of said burnpot being shaped so as to permit a solid clinker to drop out of the opening in the openable bottom when the openable bottom is in its second position.

Abstract: A Log Cartridge Burning System is provided comprising a simple, convenient and manageable wood burning system which can easily be applied for use to cook and heat. The log cartridge is comprised of a flammable body of compressed material and a bore formed and sealed by the use of a protective outer paperboard tube and a protective inner paperboard tube together with a top and bottom paperboard cover which serve to hold and maintain the integrity of the entire cartridge without the use of any wax binders. The flammable body of compressed material may be made partly or entirely from natural combustible materials such as sawdust or wheat hulls. The burn pot is specially designed to accommodate the log cartridge of the present invention. The log cartridge burning system can easily be utilized in a variety of appliances such as a patio heater or fireplace, barbecue or grill, or other cooking and heating appliances.

Abstract: The invention relates to a burner for solid fuel containing a space for a solid fuel to be burned, in which solid fuel space the flow of gas is arranged to be possible. The burner comprises at least one fire pipe (3,13) inside the solid fuel space, through the wall of which a possibility for gas flow is arranged.

Abstract: The furnace is intended for burning solid fuel (mainly fire-wood) in continuous mode of operation, with significant amount of heat released in the form of hot combustion products usable in wood-drying installations, for house heating, destroying of refuse, etc. The invention allows simplifying the design of the furnace, features high efficiency of fuel burning and high power density, and improves reliability and serviceability. The furnace includes the shaft loading hopper (1), the combustion chamber (2) located under the loading hopper (1), and the expansion chamber (3) located behind the combustion chamber (2) and provided with the forced ventilation (5). The atmospheric air, heated to the temperature of combustion products in the expansion chamber (3), is supplied to the combustion chamber (2).

Abstract: The invention relates to a heating appliance comprising an outer case made entirely of chrome, with various brick systems arranged inside the case. Within the brick systems is arranged a required quantity of chrome pipes, which ensure that the flames are able to spread throughout the appliance and that the bricks and the pipes are heated within a short span of time. To complete and operate the appliance, valves have to be installed at the chimney and outlet of the outer case, so that once the desired temperature has been reached, the valve can be shut and thus the heat maintained for a long time.

Abstract: A portable, self-contained heating apparatus has a container filled with a plurality of vertically oriented, elongated combustible objects defining a plurality of passages for allowing the flow of air. The container has a first plurality of vent openings formed near the lower end of the container, and a second plurality of vent openings formed near the upper end of the container. The vent openings allow air into the container. A wax material substantially coats the elongated combustible objects without filling all of the passages or the container. First and second bands are movably disposed on the container and move between a first location over the vent openings, and a second location away from the openings. The bands control the flow of air into the container, and thus the rate at which the elongated combustible objects burn.

Abstract: A combustion cage for pellet fuel is an inclined container having at least one wall surrounding a bottom and a support structure. The surrounding wall and bottom of the container have a plurality of holes throughout imparting a hole-to-surface ratio of at least 40% to the wall and bottom. The support structure supports the inclined container in a fixed, inclined position with reference to the horizontal.

Abstract: An indoor fireplace comprises a base, a feeding device, a combustion chamber, and a ventilation device. The base has a sliding plate provided with a feeding pipe in communication with the combustion chamber. The ventilation device comprises an air drawing apparatus, an air discharging apparatus, and a plurality of air circulation ducts.

Abstract: A method and apparatus for a pellet fuel burning heating unit for burning corn or wood pellets having a balanced pressure system having a four-way split combustion intake airstream. The invention includes a combustion air blower system for providing combustion air into a firebox containing a burner under positive pressure and at the same time providing a negative pressure to remove the combustion gases from the firebox. A pressure regulator and air splitter maintains a balance between the positive and negative pressure and adjusts the air flow into the firebox and out the exhaust. The exhaust is provided through a bank of exhaust tubes running from the top of the firebox to an exhaust manifold. The blower air moves into the pressure regulator and air splitter dividing the air flow such that a portion enters the heating unit exhaust manifold to produce a negative pressure and the remaining portion enters the heating unit burner under positive pressure.

Abstract: A method and apparatus for a pellet fuel burning heating unit for burning corn or wood pellets having a balanced pressure system having a four-way split combustion intake airstream. The invention includes a combustion air blower system for providing combustion air into a firebox containing a burner under positive pressure and at the same time providing a negative pressure to remove the combustion gases from the firebox. A pressure regulator and air splitter maintains a balance between the positive and negative pressure and adjusts the air flow into the firebox and out the exhaust. The exhaust is provided through a bank of exhaust tubes running from the top of the firebox to an exhaust manifold. The blower air moves into the pressure regulator and air splitter dividing the air flow such that a portion enters the heating unit exhaust manifold to produce a negative pressure and the remaining portion enters the heating unit burner under positive pressure.

Abstract: The charcoal lighter device uses wadded paper or other readily combustible, non-polluting material in place of polluting charcoal lighter fluid as a fire starter. The device has a housing which includes inner and outer concentric shells surrounding a central space with open top and bottom. The shells are mounted by thermally insulative connectors, such as ceramic blocks, joined to the sidewalls of both shells. The inner shell terminates short of the outer housing bottom, defining a space for the starter material. A horizontal charcoal grate is installed at the bottom of the inner shell. A series of spaced air holes extend through the outer shell below the grate. In use, charcoal is loaded above the grate with wadded newspaper below. When lighted, one newspaper sheet serves to start the charcoal which is soon glowing and ready for barbecuing. A thermally insulative handle is connected to the outer shell. The outer shell and handle remain relatively cool and safe to touch during use of the device.

Abstract: The invention relates to a combustion device for wood or coal comprising a front wall with a fuel charging opening, two side walls, a rear wall, a bottom wall, a top wall, a door for the fuel charging opening, a control element for controlling a fresh-air inlet opening, an inner dividing wall which divides the interior of the device into a pre-combustion chamber and a post-combustion chamber, and a passage opening between the two chambers and a grating at the bottom of the pre-combustion chamber and a flue gas discharge opening; the dividing wall is horizontally disposed and a shaft pipe surrounded by an annular chamber which is in communication with the fresh-air inlet opening is inserted sealingly into its passage opening; the grating is placed on its upper end.

Abstract: A solid fuel burning stove is provided and includes a housing within which a combustion chamber is located. The combustion chamber receives combustion air via an adjustable inlet formed through a channel member running along the base of the housing. The channel member defines a combustion air duct which communicates with a combustion air intake in the rear wall of the housing. Combustion air is drawn into the stove via the air intake and is forced through the combustion air duct by a fan. The combustion air passes through the adjustable inlet into the combustion chamber. A fire box is located within the combustion chamber above the adjustable inlet and holds the solid fuel to be combusted. Hot flue gases heat air flowing through a plurality of heat exchange tubes passing through the combustion chamber. The heated air flowing through the heat exchange tubes is directed into the room in which the stove is located via a plurality of vents in the front wall of the housing.

Abstract: An automatic food cooker having a tubular frame used as an air conduit system for delivering air to the fuel source. When the attached fan is turned on air is blown through the tubular frame and out the exhaust on the vertical frame members. The exhaust ports are adjacent the lower longitudinal frame near the fuel source. Therefore, regardless of the wind condition the fuel source may be fed sufficient air to promote burning. Use of the tubular frame as air conduits minimizes the cost involved in providing the air delivery system for the cooker. A portion of the frame is used as hot air conduits for drawing heated air from the cooker interior and delivering it to an upper chamber for heating or cooking food products contained therein.

Abstract: A draft controller for use with a combustible solid fuel comprises an elongated band of heat-resistant material such as sheet metal which can be flexed so that attachment devices provided on the ends of the band can be interengaged to provide an open-topped container of adjustable size and which can then be disposed on a fuel-supporting surface, for example, within a barbecue, to confine the fuel to a limited area. Or, the ends of the band can be left open to confine the fuel in a broader, shallower area. In one embodiment, the flow of combustion air to and across the top surface of the burning fuel can be controlled by forming the band with a width which varies between its two ends. In another embodiment, air flow openings are provided in the band of different sizes and/or spacings. In both embodiments, the position of the container so formed can be rotationally adjusted to optimize combustion and top surface burning of the fuel having regard to the strength of the wind.

Abstract: A heater for burning combustible pelletized fuel. The pelletized fuel is delivered at a controllable rate to a double-walled burn pot in an enclosed combustion chamber. Combustion air is injected into the combustion chamber at a pressure higher than the ambient air pressure surrounding the heater. Combustion air is injected between the walls of the burn pot through ports in the inner wall into the fuel at or slightly below the top of the fuel level. Additional combustion air is injected approximately horizontally across the top of the burn pot through an injection air manifold. Crossfire injection air is injected approximately vertically about the periphery of the burn pot, confining fumes and exhaust air directly above the burn pot. Heated exhaust gasses rise to the top of the combustion chamber and are drawn from the combustion chamber through a heat exchange unit surrounding the combustion chamber. The exhaust gasses are drawn from the combustion chamber by suction created by and extraction air mechanism.

Abstract: A wood burning device comprising a metal box with a flue, an automatic flue damper, a combustion chamber formed by layers of insulating refractory material, a transparent ceramic glass front, an insulated refractory baffle forming the top portion of the combustion chamber, a means for introducing air into the combustion chamber, and a smoke deflector upstream from the flue. The stove further includes a support for tilting the box backwards, and a latching mechanism for a slideable door on the ceramic glass front.

Abstract: A stove for burning combustible solid organic material, such as wood. The stove has a vertical fuel chamber with a combustion zone in the lower portion of the fuel chamber which is defined by an air inlet passage across the width of the fuel chamber and a convergent outflow passage at the bottom of the chamber. The combustion zone is shaped to provide a wedge-shaped area of incandescent coals during combustion in the combustion zone. No grate or other retention apparatus is needed in addition to the convergent outflow passage in order to retain fuel in place as it is consumed. The stove may be configured to provide radiant heat, as a forced air furnace, or as a boiler, or any combination of the three.

Abstract: A stove for burning wood, coal and other fuels comprised of flammable solids that among other things produce one or more flammable gases when heating or burning. The preferred form of the stove has three modes of operation--a rapid burning mode, a normal or medium burning mode and a banked mode. The user makes a preliminary decision as to whether the stove is to be operated in its normal mode or banked mode. Thereafter, controlled by temperature responsive means, the stove moves itself fully automatically back and forth from the rapid burning mode to whichever one of the other two modes of operation has been preselected by the user.

Abstract: A combustion device for solid fuel of low ash content, which has a holding board for holding the solid fuel of low ash content which has no grooves or slits, a cylindrical body forming a combustion chamber mounted on the holding board and/or a holding cone, an air absorbing space being formed between the lower edge of the cylindrical body and the holding board, and the ignition being effected by an ignition means.

Abstract: A freestanding stove is provided including an elevated firebox mounted atop a tubular pedestal having a horizontally enlarged downwardly opening hollow base at its lower end. The firebox includes a combustion air inlet opening downwardly into the pedestal and the lower end of the pedestal opens downwardly into the hollow base which includes a damper for controlling the flow of combustion air from within the hollow base into the lower end of the pedestal. The base includes feet supporting the base a spaced distance above a horizontal surface upon which the feet rest and the feet are removable whereby the base may rest directly upon and over a horizontal support surface upwardly through which a combustion air opening is formed. The front of the firebox includes an openable transparent window equipped door and combustion air inlet passage structure for sweeping curtains of combustion air across the inner surface of the window from selected marginal portions thereof.

Abstract: A barbecue grill is provided with a sliding damper for controlling the flow of combustion air into the grill. The damper is slidably mounted on the upper surface of a plate having an opening, and the damper is movable by a control rod which is secured to the damper and which extends to the outside of the grill.

Abstract: Refractory lining elements for stoves and furnaces containing vertical and intersecting lateral passages for aspirating burning fuel.

Abstract: The ceramic shell of a stove encloses a firing chamber and a helical flue gas passage and is composed of superimposed blocks, each of which has the same cross-sectional shape as the corresponding height portion of the shell. The bottom block consists of a bottom tub. The uppermost block consists of a cover provided with a smoke outlet for connection to a smoke pipe. The intermediate blocks comprise at least one set of blocks which are substantially identical in shape. In order to facilitate the building of the stove and to ensure an improved utilization of the heat of the flue gases, each of the blocks has in each end face confronting an adjacent block an annular groove, which is covered by the adjacent block and contains a refractory sealing cord, which seals the joint between said adjacent blocks. The firing chamber is surrounded by a refractory insert structure, which is disposed within the blocks that surround the firing chamber.

Abstract: An insert for a stove permits efficient burning of either coal or wood and includes a movable grate. Granular material is located around the insert for modulating the heat transferred to the stove walls from a fire on the grate. Bumps project upwardly from the grate to facilitate jostling of coal to remove ash from that coal.

Abstract: The invention relates to a stove which burns a primary combustible material in a container placed on a horizontal plate which divides the stove into upper and lower combustion chambers. The plate has a central aperture therethrough which, in operation, is in registry with a central opening in the container bottom wall. A hollow perforated tube is positioned in the container in registry with the opening and the aperture and the combustible material fills the container, surrounding the wall of the tube. When a temporary starting fire is lit in the lower chamber, the flames thereof will be drawn up into the tube and will light the combustible material in the container through the perforations in the tube. The combustible material in the container will burn radially outwardly from the tube in a uniform manner, with air circulation being provided in the expanding annular space between the tube and the burning face of the combustible material.

Abstract: An enclosed fireplace of circular cross-section mounted on a pedestal in which air is drawn into the fire chamber from spaced vertical air intake tubes mounted about the periphery of the fire chamber. A free standing wood holder rests on the center of the fire chamber and is formed of spaced horizontal concentric rings joined to a plurality of vertical legs, each leg being in the shape of a flat vane. The legs are oriented so that each of the vanes extend in a common circular direction away from the external perimeter of the rings, at an angle to the radius of the rings at the juncture of the vanes to the rings so as to impart a rotational torque to draft air passing by said vanes into the interior of the rings. The rings are of a size to contain one or more pieces of firewood with each piece preferably oriented along its vertical axis. The air intake tubes are preferably joined to a common air intake that enters through the bottom of the fireplace pedestal.

Abstract: A stove for burning solid fuels such as wood and coal with improved efficiency has three generally distinct combustion zones namely a primary zone, a secondary zone and a tertiary zone, thus ensuring fuller combustion of residual combustible gases in the tertiary zone just after the primary flue exit. The novel tertiary zone is situated only at the lower portion of the base of the flue gas exit chamber, is encased by firebrick and is fed only with combustible gases from the primary zone.

Abstract: A steel-bodied, coal burning stove is provided with an improved combustion system including a one-piece fire pot having an integral, non-shakeable grate. The pot is mounted in the lower regions of the stove and is suspended by a circular mounting ring arrangement which defines the interior of the stove into upper and lower chambers. The pot projects downwardly from the mounting ring arrangement into the lower of the stove chambers. The mounting ring arrangement is constructed to enable air to flow directly from the lower chamber, peripherally about the pot to the upper chamber, bypassing the grate and means are provided to vary the flow of such bypass air.

Abstract: A sheet metal stove comprising a shell of rectangular shape having a plurality of tubes extending between opposite sides thereof and extending therethrough to receive ambient air for combustion, adjustable dampers on the opposite ends of said tubes and slots therein between the ends to discharge air into the stove by convection, a grate supported by said tubes, a deflector sloping upwardly and forwardly from said grate, a door for the front of the stove having adjustable dampers therein to promote long burning of fuel, air heating conduits adjacent opposite sides of the shell to accept ambient air at the bottom and discharge heated air at the top, and a manifold on top of the shell to utilize combustion products before discharge to a flue to heat additional ambient air.

Abstract: The method disclosed includes positioning a furnace disposed within a shelter outside near the building, the shelter has an inlet for receiving ambient air and an outlet for passing air heated by the furnace out of the shelter. An air duct is mounted between the shelter and an opening into the building. A solid fuel is burned within the furnace to heat the air within the shelter and the heated air is transported through the duct into the building to provide supplemental heat in the event the supply of fluid fuel is interrupted.The apparatus disclosed includes a shelter having walls with an inlet for receiving ambient air and an outlet for passing heated air out of the shelter. A furnace is disposed within the shelter for heating the air and includes a grate for supporting solid fuel to be burned and an exhaust stack extending through the walls of the shelter for carrying exhaust gases from the furnace without mixing with the air within the shelter.

Abstract: A draft control is described for selectively admitting exterior fresh air to assist combustion within the interior of a fireplace. The draft control is comprised of two interconnected and relatively slidable plates. The plates are dimensioned relative to a standard firebrick to facilitate installation in existing fireplace structures. Cool, exterior air is allowed to pass through selectively aligned apertures extending through both plates into the firebox. The plates may slide between this operative position wherein the apertures are in open contact and a closed position wherein the apertures of one plate are out of alignment and do not permit free passage of air into the fireplace interior.

Abstract: The furnace for burning wood or coal has a cabinet with a front wall and interconnected spaces between the inner and outer walls at the sides, top, bottom and rear. One of two outer walls have an inlet and outlet for flow of air to be heated. There are aligned flue openings in the upper portion of one of the sets of spaced walls. A grate and an ash pan below are mounted within a lower portion of the cabinet. The front wall has at least one opening closed in an airtight manner by one or two doors. A damper, having a pipe and plate pivotally mounted on the top of the pipe at its front end, is connected to a bimetallic thermostat above it. Both are mounted on the front of the furnace. The thermostat is mounted for movement to open the damper. The front wall of the cabinet or the door, when there is one door, separates the thermostat from the fire chamber within the cabinet above the grate.

Abstract: A fuel burning heater has a lower combustion chamber with a front door and an upper heating chamber with a discharge port at the rear thereof for products of combustion. A common wall between the combustion chamber and the heating chamber defines a top for the combustion chamber and a bottom for the heating chamber. A first discharge passageway through a forward portion of the common wall conveys products of combustion into the forward portion of the heating chamber. A second discharge passageway through a rear portion of the common wall conveys products of combustion into the rear portion of the heating chamber. A damper is mounted in the second discharge passageway for movement selectively toward an open position for faster burning and toward a closed position for slower burning. Lower and upper draft regulators are mounted in lower and upper portions, respectively, of the door for introducing controlled amounts of combustion air.

Abstract: A wood or coal burning metal stove formed with a base, a top wall, a casing between the two and a lining extending completely around the lower part of the casing, the base having no openings for draft, but the draft openings being thru a casing door and the lower edge of the liner. Bolts between the liner and casing to hold the top wall base and casing in assembled relation. The casing is assembled in sections with an expansion joint for the expansion of the various side wall sections of the casing.

Abstract: A generally cylindrical casing is hollow, and is supported by a base so that the axis of the casing is horizontal. A vertical partition divides the casing into a fire chamber and a smaller exhaust chamber. The smaller chamber is vented to the outside atmosphere by a chimney. The partition does not completely isolate the chambers, but enables them to be interconnected through a small gap at its bottom. Extending rearwardly along the curved portion of the casing are two oppositely disposed parallel horizontal elongated air intake slits at the level of the bottom of the partition. The major portion of the section of the casing that surround the fire chamber is of glass. The base can have a horizontal hollow half cylindrical shell at its top which supports the casing and a vertical hollow intake duct extending from a bottom opening in the base to the slits to feed air thereto.

Abstract: A portable forced draft solid fuel burning cooker in which a duct defining base supports a centrally disposed electrically operated blower unit. Two heater units that use fuel such as briquets, acorn, small pieces of wood, twigs and the like are supported from the base on opposite sides of the blower unit. First and second manually operated dampers are provided in the base to selectively permit a desired volume of air from the blower to flow to either the first or second heater unit, or concurrently to both units. Individual cooking utensils may be heated to different temperatures on the first and second heater units if desired, by controlling the volume of air flowing to each of the heater units. A heat conducting grill may be extended across both heater units, and utilized to cook pancakes and the like.