Abstract: A fire pit includes a top plate, upright poles, side plates, and limiting members. The top plate has a central through hole and connecting parts on its lower surface. An upper end face of each upright pole is rotably connected to a corresponding one of the connecting parts in a snap-on manner. Each upright pole has mounting grooves its sides. The mounting grooves extend downwardly along an axial direction of the upright pole and pass a lower end face of the upright pole. Two ends of each side plate are insertedly connected to the mounting grooves of corresponding two of the upright poles from lower ends of the corresponding upright poles. The limiting members are movably connected to lower end portions of the sides of the respective upright poles for limiting and preventing the side plates from falling out of the mounting grooves of the upright poles.

Abstract: A combustion chamber comprises an upstream ring structure, a downstream ring structure and a plurality of circumferentially arranged combustion chamber segments. Each combustion chamber segment extends the full length of the combustion chamber. Each combustion chamber segment comprises a frame structure and at least an inner wall and the frame structure and the inner wall are integral. An upstream end of each combustion chamber segment is secured to the upstream ring structure and a downstream end of each combustion chamber segment is mounted on the downstream ring structure. The combustion chamber segments are manufactured by additive layer manufacture. The combustion chamber segments have a stiff frame structure which carries the structural loads, the thermal loads, surge loads and flameout loads and the frame structure distributes loads into adjacent components.

Abstract: The present invention relates to a simple assembled slow baking oven device, comprising a net member with a predetermined area; a plurality of clay blocks being flatly disposed on the surface of its top layer in a radiant form; an opening being disposed at the center of the net member; and each clay block has a coupling section for embedding another clay block on its lateral sides, such that when the opening at the center of the net member is pulled upward, the surrounding clay blocks will rise accordingly, and the gravity of the blocks automatically make the blocks to couple with each other on the lateral sides, and thus quickly completes a clay housing assembly for its use as a slow baking oven.

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 heating system has a modular section which can be converted to use as a store or boiler and to burn either solid or liquid and gaseous fuels. The system can be further expanded by addition of more than one module to increase the heating capacity of the system.

Abstract: The portable fire pit structure includes two foraminous front and rear wall panels that constitute shallow pans defined by peripheral flanges to the mutually facing edge portions of which flanges are attached opposed foldable left and right foraminous wall panel portions medianly hinged whereby the front and rear wall panels may be moved toward each other while the hinged foldable foraminous wall panels fold inwardly to permit collapse of the structure into a compact unit for storage and/or portability. An ash pan is provided insertable into the portable fire pit when extended for use to catch and retain ashes generated from burning wood, for instance, and brackets are provided for selectively retaining a fuel support grate spaced above the ash pan. A detachable grill structure on which food to be cooked may be supported during a cooking operation is also provided.

Abstract: An oven structure that includes a housing with an internal refractory surface and two heat diffusion walls with apertures at spaced apart and parallel relationship with respect to each other defining a centrally disposed baking chamber and two combustion chambers. The apertures allow a predetermined amount of heat to pass through to the baking chamber without affecting the object being baked by direct contact with flames or other areas with excessive heat concentration. A uniform temperature is maintained within the baking chamber with the hot gases passing through the apertures to the baking chamber where high pressure is developed but the top with the hottest gases and push the mass of gases with a lower temperature down and into the exhaust system.

Abstract: A refractory brick that has a rear portion with a geometrical concavity on one side and a corresponding convex projection on the other side, the concavity and projection being matched so that the concavity mates with the corresponding projection of a similar refractory brick when the two are disposed in side-by-side relationship. Extending perpendicular from the base portion is a generally rectangular projection such that when a plurality of bricks are disposed in a side-by-side array, they are locked together by the mating concavities and projections, and the generally rectangular projections extend inwardly to form a thicker lining to withstand the force of a tap stream of molten metal for a longer duration.

Abstract: An expansion ring for expanding the size of an oven is disclosed. The expansion ring has a plurality of expansion ring segments which are connected together by one or more clips. The expansion ring segments have end portions which, when two segments are placed in end-to-end relation, form an engagement portion having first and second stops. The clip has a channel which engages the engagement portion so as to hold the expansion ring segments together and a finger projecting into the channel. According to this arrangement, the clip is slidable between a first position where the finger engages the first stop and a second position where the finger engages the second stop. In the first position, the expansion ring segments are locked together. In the second position, the segments may be separated, but the clip remains attached to one of the segments so that it will not be lost. An oven incorporating the expansion rings and clips of the present invention is also disclosed.

Abstract: There is disclosed a burning apparatus having a general burning chamber provided with an air-guide inlet for feeding air from above into the burning chamber and air-discharge outlet to which a funnel is connected. In said burning chamber, a burn-promoting plate formed with a suitable number of piercing holes is disposed from the ceiling of said burning chamber to halfway thereof toward the floor surface of the burning chamber.Fuel or refuse thrown into said burning chamber is burnt from up to down and the burning operation is completed while giving rise to almost no smoke.

Abstract: Improved performance in a hot gas generator 10 is achieved by providing a pair of hemispherical liners 22 and 24 loosely positioned within an interior wall 14 of a vessel 12 so as to be disposed above a combustion chamber 20 therein. The hemispherical liners 22 and 24 normally have a groove 26 at an interface therebetween and are formed of a material adapted to thermally expand under heat. Specifically, the hemispherical liners 22 and 24 expand to close the groove 26 at the interface in a manner producing relatively little stress thereon.

Abstract: An incinerator comprising reinforced concrete panels secured together in an array on a base plate to define a vertical enclosure with narrow gaps between adjacent panels, the panels being secured together in the array by a metal ring that extends around the upper ends of the panels and a removable top assembly that is designed to act both as a weather protective roof and a chimney to improve the drawing capacity of the incinerator.

Abstract: Disclosed is a modular masonry heating system having a modular firebox assembly positioned within the flue chamber of an outer modular heat shell asembly. The heat shell comprises an enclosing wall and a cover each of which is formed from smaller modules and is self-supporting without these modules being secured together by a bonding material. The firebox comprises a foundation, a fire chamber enclosure and a riser each of which is formed from smaller modules and is self-supporting without these modules being secured together by a bonding material. The sets of modules for the heat shell wall and cover and the firebox riser and foundation may each have a different shape but the modules in the same set may have a substantially uniform size and shape. After assembly, the firebox and heat shell are each freestanding independently of the other.

Abstract: A lining for a furnace chamber which is at least approximately round in cross-section is divided into at least two layers in a radial direction and into at least two portions in an axial direction. A gas seal is disposed between the lining portions, the gas seal being in the form of a foil as of metal and being divided in a radial direction into at least two portions releasably connected together in such a manner as to permit the inner portion to be removed in an axial direction. The gas seal can therefore be composed of individual seal portions, in a radial direction, and can be fitted separately.

Abstract: A stove for heating a room has three coaxially nested tubular columns formed of superposed rings of ceramic material, these columns defining an innermost channel rising above a combustion chamber to carry off evolving flue gases, an intermediate channel in which the flue gases descend, and an outermost channel which is subdivided by a cylindrical metallic partition into an inner and an outer cylinder section, the former serving as a duct for the escape of the flue gases to an elevated exhaust while the latter is traversed by air to be heated through that partition. Passages connecting the combustion chamber with the inner channel section help entrain an initial gas flow, during start-up, through the descending path of the intermediate channel.

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

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: A boiler construction is disclosed which eliminates the need for bolting together of internal parts thereby greatly facilitating mass production and rapid assembly procedures. Internal side protectors, in addition to establishing the size of the boiler in the front-to-back direction, serve as support rails for a removable boiler module and as a retainer for fire bricks which are further retained by a firebox grate. Front and back protectors for the boiler interior rest upon the grate support members and are maintained in properly spaced relationship through interfitment with the side protectors. A boiler scraping attachment and boiler tube cleaner are disclosed. A positive releasable retainer arrangement for the slide-in, slide-out boiler module is included.

Abstract: A compact rectangular boiler for hot water heating systems serves as a booster or helper boiler but can be used in some cases as a primary boiler. A boiler power module consisting of fire tubes and a surrounding water chamber is readily removable like a sliding drawer for cleaning and repair, when necessary. Beneath the boiler power module is a sturdy refractory lined fire box for burning wood or other solid fuel including a cast iron grate. Beneath the grate is a readily removable ash receiving drawer or pan. The boiler power module may employ an alternate heating source in the form of an electrical heating element. Forced draft and manual draft arrangements are included.

Abstract: A stove having walls which are shaped and supported to prevent warping thereof. A combustion chamber in the stove is defined by bottom and side walls positioned and oriented to maximize the space available for such a chamber. The walls of the combustion chamber have top caps thereon for ensuring and maintaining the proper positioning of those walls. Further holding elements are included in the stove to maintain the combustion chamber walls in position. An alternative embodiment of the stove includes front opening access doors.