Abstract: A cooking appliance is disclosed including a burner assembly that effectively and efficiently combusts fuel and directs the resulting smoke from a burn pot of the burner assembly to a cook chamber of a cooking appliance. The burner assembly may include a series of openings and curved faces that provide airflow to push smoke from the burn pot to the cook chamber and provide more turbulence and better heat and smoke circulation in the smoker. The burn pot may define one or more vents and include a one or more curved or shrouded surfaces. The burner assembly may include one or more deflector plates configured to direct the flow of smoke from the burn pot to the cook chamber.

Abstract: A fire pit is disclosed that includes a burn chamber, a removable fire grate, and a removable ash pan. The burn chamber is defined by an inwardly facing surface and a bottom. The removable fire grate is positioned within the burn chamber and supports combustible fuel for burning. The removable fire includes a plurality of holes sized to permit passage of ash from the combustible fuel, and at least one grip feature sized and shaped to permit a user to remove the removable fire grate from the fire pit by lifting the removable fire grate vertically through the burn chamber. The removable ash pan is positioned within the burn chamber beneath the removable fire grate, and includes, a side wall, a bottom, and at least one grippable surface configured to permit the user to remove the removable ash pan from the fire pit by lifting the removable ash pan vertically through the burn chamber.

Abstract: This concept is very new, and it will allow for safe and continuous operation of gas heating units when the induced draft fan no longer operates. This device will allow the HVAC service technician to continue to operate the gas heating unit until the proper replacement induced draft fan can be acquired and installed on the gas heating unit. This invention is a supplemental induced draft fan that will attach to the exhaust output side of a gas heating units inoperable induced draft fan to draft air through the heat exchanger and create a vacuum to the pressure switch at a rate to be regulated by a control switch to make the gas heating unit operate safely until the correct part is acquired and installed.

Abstract: The invention relates to a wood pellet stove, comprising a feed device for automatically adding wood pellets in a metered manner from a pellet hopper belonging to the stove. Said pellet hopper having the feed device and a grate is accommodated in a lower, stationary stove part (20), which remains cold and does not become hot during operation. The combustion chamber having a chimney connection is accommodated in an upper stove part (21). The upper stove part (21) is supported on the lower stove part (20) by means of a turntable so that the upper stove part can be swiveled relative to the lower, stationary stove part (20). Thus, the combustion chamber and the viewing window can be swiveled in any desired direction as needed.

Abstract: The invention relates to a fume box having a separation partition (16) in the upper portion thereof that comprises a removable catalyst block (17) offset relative to the inlet (10) and the outlet (8), and an intake passage that can be blocked by at least one insulating block. Deflectors slow down the gases and fumes and protect the catalyst block against falling soot and particle. The invention is particularly intended for manufacturers of domestic combustion heating appliances, in particular those using wood.

Abstract: A fuel feed system for conveying particulate fuel from a hopper to a firebox in a stove is provided. The fuel feed system includes an inlet opening to receive particulate fuel and a fuel collection plate located below the inlet opening. A fuel passageway is located below the plate. The passageway includes a fuel delivery end located in a firebox and a fuel infeed end below the plate. A fuel delivery system moves fuel through the passageway from the infeed end to the delivery end. A motor actuates the fuel delivery system.

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: A pellet stove is disclosed comprising a reverse flow heated air pathway defined by stove sections. In an illustrated embodiment, the space between upper and lower stove sections is open to provide a heating or oven area. The stove can be readily disassembled in part for easy portability.

Abstract: An exemplary heating system can be configured with a control system configured for controlling the heating system to reduce inefficiencies, and/or allow the heating system to operate in a relatively optimum manner. In accordance with an exemplary embodiment, a closed-loop control system may be configured to control various portions of the heating system based, at least in part, upon signals and/or information received from various sensors of the heating system. For example, among various other types of information provided within a closed-loop feedback, control may be configured based upon the pressure within the combustion chamber. In accordance with another exemplary embodiment, the closed-loop control system may determine a portion of the heating system is not operating properly, based at least in part upon feedback from one or more sensors configured within the heating system.

Abstract: A pellet stove utilizing gravity feed and natural draft more effectively and efficiently burns pellet fuel while producing less air pollution and ash. In one embodiment, the pellet stove has a primary combustion area comprising a burn unit removably disposed in the vent tube, a feed tube defining a fuel chamber above the burn unit and a secondary combustion area, comprising a burn box defining a secondary burn chamber, below the burn unit. The burn unit has a removable receptacle which defines a primary burn chamber that receives pellet fuel from the fuel chamber and discharges substantially burned fuel to the secondary burn chamber for additional burning. Openings in the burn box, pellet receptacle and vent tube draw air into the burn chambers. A control mechanism controls the air flow to regulate the heat generated by the pellet stove. The pellet stove can be manufactured in various aesthetically pleasing designs.

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 burner comprising a fuel reservoir, a primary combustion zone located at the lower end of the fuel reservoir, a secondary combustion zone located underneath the primary combustion zone, a passage providing communication between the primary and secondary combustion zones, a flue for discharging products of combustion from the secondary combustion zone, the primary combustion zone having a peripheral wall incorporating air hole means to provide combustion air to the primary combustion zone, wherein the cross-sectional area of the air hole means is substantially equal to the combined minimum cross-sectional area of the passage and the minimum cross?sectional flow area of the flue.

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: A pellet stove is disclosed comprising a reverse flow heated air pathway defined by stove sections. In an illustrated embodiment, the space between upper and lower stove sections is open to provide a heating or oven area. The stove can be readily disassembled in part for easy portability.

Abstract: A burnpot for a solid particulate stove is disclosed. The burnpot includes a bottom cover, a top cover, two side plates connecting the top cover and the bottom cover, a bottom grate having a plurality of bottom grate apertures disposed therein and positioned intermediate the bottom cover and the top cover, a top grate having a plurality of top grate apertures disposed therein and positioned intermediate the bottom grate and the top cover and an air passageway configured to direct air to a burn chamber of the burnpot through the bottom grate and the top grate.

Abstract: There is provided a pelletized-biomass combustion device comprising: (a) an elongate upright combustion capsule; (b) a grate element disposed within and bisecting the combustion capsule, (i) the grate element having a first side and a second side and (ii) the grate element open to fluid communication between the first side and the second side; (c) a first combustion air inlet facing the first side of the grate; (d) a second combustion air inlet facing the second side of the grate; (e) a fuel-feed inlet; and (f) a flue-gas exhaust outlet. The combustion capsule can be formed of two mated components such as a chamber housing mated with a burn pot member, or instead it can be formed as a single unit such as the chamber housing bisected by the grate. In any event, the grate element has two sides, and there are two combustion air inlets, each facing opposite sides of the grate. The combustion device is preferably an induced-draft system wherein the exhaust fan is positioned at the distal end of the stove pipe.

Abstract: A biomass pellet burning stove has a hopper storing biomass pellets which are transported from the hopper to a feeder tube with a rotating disc having slots for holding biomass pellets and allowing the biomass pellets to move from the slots into a feeder tube which directs the biomass pellets to a burn pot. The burn pot has first and second biomass burning chambers that separately burn biomass pellets by an efficient, environmental and economic compatible process.

Abstract: A burner comprising a fuel reservoir, a primary combustion zone located at the lower end of the fuel reservoir, a secondary combustion zone located underneath the primary combustion zone, a passage providing communication between the primary and secondary combustion zones, a flue for discharging products of combustion from the secondary combustion zone, the primary combustion zone having a peripheral wall incorporating air hole means to provide combustion air to the primary combustion zone, wherein the cross-sectional area of the air hole means is substantially equal to the combined minimum cross-sectional area of the passage and the minimum cross?sectional flow area of the flue.

Abstract: A pellet furnace heating apparatus for burning a solid fuel, which pellet furnace heating apparatus in one embodiment includes an enclosure which houses a furnace. A furnace air blower is provided in air communication with the furnace for blowing the burning fuel and increasing heat in the furnace. A hopper is provided for containing the solid fuel, and a fuel delivery mechanism connects the hopper and the furnace for delivering the solid fuel to the furnace. In another embodiment, the pellet furnace heating apparatus includes a burner having a pilot housing and a combustion housing. A fuel delivery mechanism connects a hopper containing the solid fuel with the combustion housing of the burner for delivering the solid fuel to the burner. A furnace air blower is provided in air communication with the pilot housing of the burner for blowing the burning fuel and increasing the heat in the burner.

Abstract: A natural draft, gravity feed pellet stove. The body of the stove is formed by a vertical section of large diameter pipe, with an air intake pipe extending from the back of the stove to below combustion grate. Pellet fuel is discharged onto the grate through a slot at the bottom of a hopper, and the grate is sloped so that the pellets roll away from the slot and over the grate as they are combusted. The combustion gasses flow into two exhaust pipes, each having a diameter similar to that of the intake pipe so as to establish a 2:1 exhaust/intake flow ratio. Cross-drilled reburner tubes are installed across the intake ends of the exhaust pipes to provide additional air for complete combustion. The bottom plates of the storage hopper are free from attachment along their lower edges, so that these expand and contract on a continuous basis with changes in the temperature of the stove; this causes cyclical distortion of the plates which shifts the fuel downwardly towards the discharge opening.

Abstract: A burner system is described for burning granular pellets and similarly sized solid biomass heating fuel, e.g. wood pellets. It includes an air tight fire chamber having an exhaust outlet in an upper region thereof and a burner (10) in the bottom thereof for converting the solid fuel to fuel gases and ash in the presence of a limited air supply and combusting the gases formed. The burner comprises upright co-axial inner (12) and outer (11) cylindrical walls providing a confined central gasification/combustion chamber surrounded by an annular combustion air manifold (15). The annular combustion air manifold (15) is closed at the top and bottom with an air inlet (16) in the outer wall and a plurality of spaced aperatures (17) arranged in upward rows in the inner cylindrical wall providing air inlets from the combustion air manifold to the combustion zone of the chamber. A grate at the bottom of the gasification/combustion chamber holds the solid fuel while allowing ash to pass through the grate.

Abstract: A heating apparatus comprises a combustion chamber, formed of an assembly having a rear wall, two lateral walls, an upper wall and a lower wall. The combustion chamber has at least one outlet for flue gases. The walls forming said combustion chamber are configured to have standard dimensions so that the heating apparatus is configurable to operate with a variety of fuels including solid fuels, liquid fuels and gas fuels.

Abstract: A combustion system includes a primary combustion chamber divided into left and right sides by fuel-retaining standards defining a canyon or void extending into a secondary combustion chamber is provided. The floor of the primary combustion chamber and the fuel-retaining standards direct the burning solid fuel toward the lower part of the canyon, while at the same time retaining the non-burning solid fuel on either side of the fuel-retaining standards. The combustion system further includes an air delivery system having a lower air tube supplying high and low velocity air and an upper air tube. The lower air tube is positioned proximate to a firebox floor, while the upper air tube is positioned within the secondary chamber. Automatic air setting mechanisms are provided so that proper air settings can be maintained during various phases of a fire.

Abstract: A natural draft, gravity feed pellet stove. The body of the stove is formed by a vertical section of large diameter pipe, with an air intake pipe extending from the back of the stove to below a combustion grate. Pellet fuel is discharged onto the grate through a slot at the bottom of a hopper, and the grate is sloped so that the pellets roll away from the slot and over the grate as they are combusted. The combustion gasses flow into two exhaust pipes, each having a diameter similar to that of the intake pipe so as to establish a 2:1 exhaust/intake flow ratio. Cross-drilled reburner tubes are installed across the intake ends of the exhaust pipes to provide additional air for complete combustion. The bottom plates of the storage hopper are free from attachment along their lower edges, so that these expand and contract on a continuous basis with changes in the temperature of the stove; this causes cyclical distortion of the plates which shifts the fuel downwardly towards the discharge opening.

Abstract: A pellet fuel burner includes a compact thermally insulated firebox for providing hot gases to a boiler, furnace or dryer. The apparatus includes a grate that includes a reciprocating arm for removing clinkers and ash from the grate. Pellet fuel feed is provided by a hopper that is isolated from the firebox by an airlock. A combustion air manifold is provided around the firebox to preheat primary and secondary combustion air.

Abstract: An improved augering device and an accessible ash and pellet fines collection drawer which function together as a unique combination to remove pellet fines from a wood pellet burning stove, wherein the augering device has a screw mounted in a barrel formed by a tubular wall which also provides the pellet outlet to the firebox. Sieving apertures are formed through the tubular wall and are of a size particularly suited for the sieving of fines from the pellet fuel. The ash and fines collection drawer is adapted for positioning below the apertures in a non-fired portion of the stove, and an access opening is provided through a wall portion of the stove for insertion and removal of the drawer with respect to the stove.

Abstract: A pellet stove or grill includes a housing (10) divided by a thermal barrier (43), which is defined by a spaced pair of partitions (20, 21), into a hot compartment (23) and a cold compartment (47). The hot compartment includes a ventilated firepot (44) suspended within an air channel (40) that communicates with the cold compartment through the thermal barrier. The cold compartment is subdivided by a funnel (22) into a fuel pellet storage compartment (24) thereabove and an electrical compartment (25) therebelow. The electrical compartment includes a motorized, fuel conveyer (37) for feeding fuel pellets (31 ) from the storage compartment, down a chute (38) that extends through the thermal barrier, and into the firepot in the hot compartment for combustion. The chute includes a portion that is positioned within and communicates with the thermal barrier. An air blower (34) drives fresh air into the electrical compartment and into the thermal barrier through an aperture (50) in one of the partitions.

Abstract: A wood pellet stove comprising a body, a burning means, a heat exchanger means, a waste gas exhaust means, a feeding means, a cleaning means and a control system. The burning means includes a seat member, a container, a bottom member, a top member, two first pillars, two second pillars and a inlet pipe. The cleaning means includes three scrape member. Each of scrape member includes a scrape plate, a pipe, a rod and a hoop element.

Abstract: A pellet-fired cooking grill which includes a housing having a grill chamber defined within it. Tubular structure extends downwardly from the base of the chamber and defined within this structure is a burning zone. A hopper holding pellet fuel disposed above and adjacent the burning zone supplied pellets through a gravity operated chute to the burning zone.

Abstract: A furnace for solid fuels is especially for pellets. This furnace includes a combustion chamber, a holder pan for the combustion material positioned in the combustion chamber, and a combustion material transport device located between the holder pan and a fuel container for combustion material. The combustion chamber is surrounded by a convection space, which is closed off towards the outside by a convection mantle, with a blower arranged between the ambient air and the convection space, if necessary. A flue gas blower is arranged between the combustion chamber and a flue gas line. A flue gas channel is arranged in front of at least one rear wall of the combustion chamber on the side facing away from the combustion chamber. This channel extends over at least part of a width and a height of the combustion chamber.

Abstract: A pellet fuel burning apparatus which includes a housing and a display chamber defined within the housing. Window structure enables viewing of the interior of the chamber from outside the housing. Pellet fuel is burned in a zone remote from the display chamber. Flames and gaseous combustion products from the pellet fuel fire are channel upwardly into the display chamber against simulated logs.

Abstract: Smoke generating apparatus has a heater provided in a housing defining a heating chamber, and a slide member movable to and fro for displacing briquettes in a stepped motion onto the heater in succession from the bottom of the stack of such briquettes, so that each briquette is consumed progressively in successive portions at successive time intervals. The slide member is displaced by a mechamism including a pawl and ratchet mechanism which is adjustable to vary the rate of advance of the briquettes to the heater.

Abstract: A pellet burning stove includes a firebox defining a combustion chamber, a pellet burner located within the firebox, a feed system for moving combustible pellets to the pellet burner and an ash pan for receiving ashes from the pellet burner. The pellet burner includes a horizontal surface having an elongated combustion zone defined by a plurality of primary air openings in the burner surface, and a feed surface adjacent to the combustion zone. The feed system moves a thin layer of combustible pellets across the feed surface into the combustion zone. An air plenum surrounding the feed surface of the pellet burner supplies combustion air upwardly through the primary air opening and the layer of combustible pellets. The air plenum maintains the pellets relatively cool until they reach the combustion zone. Ashes drop off an edge of the burner surface into an ash pan. An artificial log set and a log support member fabricated of refractory fiber material define a secondary combustion cavity above the pellet burner.

Abstract: A pellet stove has an arrangement for improving the flow of air therethrough. Air entering the stove is split into first and second portions. The first portion is diverted upwardly through a combustion chamber, wherein pellets are burned, thereby aiding in the burning of the pellets. The first portion of air then exits from the combustion chamber. It is directed to a rear of the stove through a heat exchanger where a flue exhaust is located. The second portion of air has three parts. The second portion of air is simultaneously diverted upwardly around the hopper and auger mechanisms, whereby the mechanisms and the pellets therein are cooled. One part of the second portion of air then is received in the flue exhaust so that this one part of the second portion of air exits the stove, creating a negative pressure in the combustion chamber.

Abstract: A mantel device for storing and dispensing fuel for insert-type pellet stoves having a continuous feed hopper. A pellet stove mantel has a hopper inside the mantel. The mantel hopper is attachable to the continuous feed hopper of the pallet stove and provides hopper to hopper fuel feed. The mantel device has the appearance of a zero clearance fireplace including a flush mounted mantel, a pedestal lift attached to the main frame of the mantel and a hearth mat is fastened to the main frame of the mantel and the pedestal lift. The mantel hopper is located in the upper portion of the mantel and has a plurality of angled sides forming a funnel. The mantel also has a cap at the top with an opening covered by a lid which provides an access to the hopper.

Abstract: An immersible water heater for burning solid fuel to heat water contained within hot tubs, tanks, and the like. The heater includes a vertically oriented combined air-fuel intake tube by which the fuel is gravity fed through an unobstructed opening at its lowermost end into a laterally placed combustion chamber. The combustion chamber terminates at its upper end into a chimney having a top opening above the top opening of the air-fuel intake tube to provide an air draft which cools fuel within the intake tube while, at the same time, providing oxygen for combustion within the combustion chamber. Brackets engaging the lip and sides of the tank or tub support the heater in spaced relationship to the sides and bottom of the container to prevent heat damage.

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: An automatic log feeder for fireplaces is provided which includes an upper horizontal conveyor, an intermediate carriage mechanism and a lower horizontal conveyor. The upper horizontal conveyor is used to store a plurality of logs outside of a building and to advance individual logs through the feeder as desired. Through use of a unique guide rail and rail following bracket the intermediate carriage mechanism receives individual logs from the upper conveyor and lowers them to the lower conveyor while simultaneously changing orientation of the individual logs by 90.degree. before depositing them onto the lower conveyor. The lower conveyor is adapted to automatically advance individual logs into the fireplace in a cantilevered fashion before gently tipping them onto the fireplace grating, or, allows for manual removal of the log from the lower conveyor through an access door extending to the interior of a building.

Abstract: A down-draft, gravity fed, bio-mass, solid fuel burning stove or furnace comprises an upright cylindrical housing having a top cover and a fire resistant openable air-tight floor. Fuel drops onto the center of the floor through a central feed tube where it burns in the form of a truncated conical pile. A second tube surrounds the feed tube, defining with it an annular air intake passage for discharging an annular current of air downwardly on the burning fuel. A heat exchanger surrounds the housing and its inner wall defines with the housing a smoke passage for upward escape of the hot gases of combustion. Heat from the smoke passage heats the contents of the heat exchanger. A baffle in the smoke passage enhances heat transfer. The central tube and cover are removable as a unit.

Abstract: An improved coal stove grate including a floor and side walls to either side of the floor. Coal is pushed along the floor, up a rise surface, past a crest at the end of the rise surface and along a fire support section to the end of the grate. Part of the coal forced up the rise surface rolls back to fill a reservoir space in the grate and fuel a fire extending the full length of the grate during heating and a stable long-burning fire during turndown of the stove.

Abstract: A self loading wood burning stove is provided and consists of a storage bin, a fire box and a conveyor for delivering automatically logs individually from the storage bin to the fire box.

Abstract: A dual stage combustion furnace has primary and secondary combustion chambers. The primary combustion chamber contains a solid fuel, such as wood or coal. The secondary combustion chamber is formed adjacent to and in communication with the primary combustion chamber for containing and igniting volatile combustion gases produced in the primary chamber. A plurality of hollow members, which provide a grate, extend through the primary chamber, and into the secondary chamber. Volatile gases given off in the primary combustion chamber are then ignited and burned in the secondary combustion chamber upon combination with heated air passing through the hollow grate members.

Abstract: In the stove, pluralities of elongated logs are stacked on top of one another, substantially on parallels to a generally horizontal axis, to form a pair of sloping, single-log-wide, axially extending stacks of the same which are spaced apart but converge in the bottom of a sump at points above a slot in the vertical plane of the axis. Air is admitted to the sump through the slot, and a pair of spaced abutments is disposed upright in the plane of the axis at the sump, to engage between the opposing faces of the bottommost logs in the stacks and form an air flow channel therebetween above the slot. Moreover, a chamber is formed above the channel to confine the flames and the flow of combustion products from the channel to the space between the stacks of logs. The chamber in turn discharges the combustion products to a low pressure zone where they escape to atmosphere or the like.

Abstract: A heater is disclosed for burning combustible particulate fuels. The fuels are delivered to an internal retort at a constant rate. They are burned at an open end of the retort with the aid of a primary air supply manifold that surrounds the open end of the retort and directs primary combustion air into the particulates at the open retort end. Secondary combustion air is directed through an annular air supply manifold situated above the open retort end. The hot exhaust gases pass upwardly through a combustion chamber and subsequently downwardly through an exhaust gas plenum to an exhaust gas discharge. Flow of the combustion air and exhaust gases is induced by a vacuum blower mechanism by which a reduced pressure is produced within the combustion chamber to draw air through the primary and secondary air supply manifolds. The exhaust gases drawn off by the vacuum mechanism are pressurized on a discharge side of the vacuum mechanism.

Abstract: A downdraft furnace comprises a combustion component associated with a heat exchange component. The combustion component includes a fuel chamber, a primary combustion chamber and a secondary combustion chamber operatively interconnected by a constricting throat opening. Log support structure is provided to carry split logs and at an angle of approximately thirty degrees from the horizontal. The support structure and the logs define a primary air flow passage directed toward the throat opening through which primary air flow is directed at the bottom portions of the fuel segments. The inlet includes closure means to restrict and vertically vary slightly the path of primary air flow. Passage means are provided to introduce secondary air directly at the throat opening. The inlet includes closure means to restrict and vertically slightly vary the path of primary air flow.

Abstract: A dual stage combustion furnace has primary and secondary combustion chambers. The primary combustion chamber contains a solid fuel, such as wood or coal. The secondary combustion chamber is formed adjacent to and in communication with the primary combustion chamber for containing and igniting volatile combustion gases produced in the primary chamber. A plurality of hollow members, which provide a grate, extend through the primary chamber, and into the secondary chamber. Volatile gases given off in the primary combustion chamber are then ignited and burned in the secondary combustion chamber upon combination with heated air passing through the hollow grate members.

Abstract: A detachable fuel feeder device for use with wood stoves is disclosed comprising an inclined fuel storage chamber adapted for alignment with the door opening of the wood stove, a dog clamp for detachably mounting the chamber to the wood stove, a door pivotally mounted to the storage chamber, a releasable catch selectively holding the door to close off the storage chamber, and a sensor to sense the amount of combusting wood fuel in the combustion chamber of the wood stove and being operationally connected to the catch to actuate the catch upon sensing a predetermined amount of combusting wood fuel. Alternative sensors are disclosed for sensing the height of combusting fuel, the weight of combusting fuel and a predetermined amount of heat.An alternate embodiment discloses a generally horizontal fuel storage chamber having a spring-loaded pusher element for injecting wood fuel into the combustion chamber.

Abstract: An improved process of the type wherein a fuel is first pyrolyzed in a chamber (14) and the resulting volatiles and non-volatiles then transferred to a combustion region (18) for burning, the improvement comprising temporarily storing at least a portion of the volatiles in an enclosure (24) spaced from the chamber (14) and the combustion region (18) when volatiles production exceeds the volatiles incineration capability of the combustion region. Apparatus for carrying out the method of the invention is also disclosed.

Abstract: A wood burning heating unit capable of being stoked for continuous or extended burning, and of achieving effective combustion of volatiles contained in the smoke is provided. The stove body, a generally cylindrical casing, is supported so that its axis is substantially horizontal. A baffle divides the casing into a fire box or combustion chamber and an exhaust chamber which functions as a heat exchanger. The exhaust chamber is vented to the outside atmosphere by an exhaust conduit or flue pipe. A pair of elongate, fuel feed conduits extend downwardly and inwardly into the fire box or combustion chamber, so that respective, generally upstanding columns of logs can be formed in the fuel feeding conduits with the lower ends of the wood log columns contacting each other to define and limit the area of combustion in the fire box.

Abstract: A solid fuel boiler has a facia for radiant heat to pass into a living room while the flue hopper, the flueways and ash pan are accessible from another room or out-building. A dividing wall is shown. By separating the radiant and aesthetic side of the boiler which is in the living room from the operating side, dust and dirt often associated with filling and emptying the boiler is confined to the other room or out-building. The flueway is relatively narrow which improves heat-transfer; this is possible because chimney sweeping can be done without having to pass brushes through the flueway.