Abstract: A biomass pellet combustion system includes a primary burn chamber, a coal burn chamber, and a gas burn chamber. The primary burn chamber is configured to receive pellets from a drop tube of the biomass pellet combustion system. The coal burn chamber is configured to receive coals from the primary burn chamber. The gas burn chamber is configured to receive combustible gases from both the primary burn chamber and the coal burn chamber, wherein a secondary combustion process converts secondary combustion air and the combustible gases into exhaust gases in the gas burn chamber.

Abstract: A biomass-burning fireplace assembly with a hopper and an outlet adjacent to the hopper outlet. A fuel metering assembly is adjacent to the hopper outlet and the barrier member. The fuel metering assembly has a fuel metering receptacle that receives the biomass fuel from the hopper. The fuel metering receptacle is moveable relative to the hopper between first and second positions on opposite sides of the barrier member. The barrier member is a physical barrier between the fuel metering receptacle and the hopper outlet when in the second position. A fuel feed assembly receives fuel from the fuel metering receptacle when is in the second position. The fuel feed assembly moves the fuel onto a burn platform assembly coupled to the firebox adjacent to the fuel inlet opening.

Abstract: An oven for use with a variable pitch fuel supplier and for use with biomass fuel. The oven has a body which is able to be placed on the ground. The body has a combustion cabinet and an auxiliary equipment cabinet. The combustion cabinet has a burner received therein and the auxiliary equipment cabinet has a fuel supplier and an electrical equipment received therein. The fuel supplier has a hopper, a fuel tube, and a rotary vane feeder rotatably received in the fuel tube. The electrical equipment has a power supply and a feeding motor driving the rotary vane feeder. Pitches vary larger from a tail end to a free end of the rotary vane feeder.

Abstract: An oven has an enclosed heat exchange zone for use with biomass fuel. The oven has a body which is able to be placed on the ground. The body has a combustion cabinet and an auxiliary equipment cabinet. The combustion cabinet has a burner received therein. The burner has a fire grate, a side plate, a blowing space, and a hearth. A heat exchange zone is defined by the surrounding tubular inner wall; a side heating zone being defined by a tubular inner and a tubular outer walls. A chimney is formed on the tubular outer wall in communication with an upper portion of the side heating zone. An opening is defined in the top of the combustion cabinet right above the tibular inner wall.

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: 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: 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: A stove with a door opening mechanism is provided. The stove includes a stove housing, a stove door a sensing device and an activation mechanism. The stove housing forms a fuel chamber. The stove door is pivotally coupled to the stove housing to provide access to the fuel chamber. The sensing device is adapted to sense a condition that indicates fuel is about to be placed in the fuel chamber. The activation mechanism is adapted to open the stove door in response to the sensing device sensing a condition that indicates fuel is about to be placed in the fuel chamber.

Abstract: An automatic coal stoker is provided with internal means to increase the sensible heal outflow from the operating stoker, which means comprises a modified stoker housing that provides a first combustion chamber and an abutting second chamber for induced air heat exchange with the hot combustion gases. A tubular means is disposed in the second chamber which intakes the combustion gases to be vented and extracts much of their sensible heat, and then directs by forced convection, the heated air useful to the stoker environment, while venting the spent combustion gases to the standard flue means.

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 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: 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 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 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 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 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: 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: 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: The disclosure herein describes a furnace for consuming solid fuel, such as wood, which comprises a gravitational feed chute for feeding the solid fuel in a combustion chamber; the chute has an open lower feed end adjoining the combustion chamber, the feed end being equipped with a plurality of flexible spaced retaining elements which serve to support the load of solid fuel in the chute; air nozzles are provided in the combustion chamber facing the feed end of the chute to create a circulation forcing combustion gases to pass through a zone of high temperature in the combustion chamber.

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 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: A wood burning stove is disclosed which includes a stove housing that defines an upper zone comprising storage and exhaust chambers, and a lower zone for accommodating a wood burning fire. The exhaust and storage chambers are separated by a divider, both chambers having bottom openings that communicate directly with the top of the lower fire zone. Covering one opening in the housing and providing access to the fire zone is a fire door while another opening provides access at the top of the storage chamber and is covered by a wood fill door. The exhaust chamber communicates with and discharges smoke into a stovepipe or flue retaining chimney. A supply of logs is loaded into the storage chamber through its fill door. These feed automatically and sequentially by gravity from the storage chamber bottom into the fire zone for consumption by a fire burning therein.

Abstract: A device for automatically dropping logs at a predetermined time for charging a fire laid on the bottom of a woodburning stove. The device includes a pair of elongated arcuate shaped log supporting members each of which is journaled within the stove adjacent a respective top side corner thereof. A latching system is connected to the log supporting member for releasably maintaining the log supporting members in a substantially horizontal supporting position. An electrically operated movable member is connected to the latching system for releasing the latching system upon being energized under control of a timing device at a predetermined time. As a result, the stove can be automatically charged during the middle of the night ensuring a fire in the morning.