221results about "Grates" patented technology

Cooking grates and grills incorporating such cooking grates are provided. A representative cooking grate includes: a plurality of elongate elements of heat resistant material, the elements being V-shaped in transverse cross-section, each of the elements having a first lower edge, a second lower edge and a vertex, the first lower edge and the second lower edge being spaced from each other with the vertex being located therebetween, the vertex being operative as a cooking surface to support food during cooking on the cooking grate; corresponding adjacent lower edges of adjacent ones of the elements being oriented to define gaps therebetween such that a first of the gaps, defined by a first lower edge of a first element and a second lower edge of a second element, exhibits a width of between approximately 5% and approximately 18% of a distance between the first lower edge and the second lower edge of the first element.

A portable pellet fired heating element for mounting to a grill or stove and comprising a gravity fed pellet holder, a unitary tubular structure having a burner, an air intake and an exhaust chute. Fuel may be supplied to the pellet holder by various supply means such as a conveyer, ramp, scooped, held in bulk in a hopper, and like pellet supply structures and methods. Fuel is fed to the air-cooled insulated burner area onto a decomposer grate, which defines the primary combustion area and which is partially open to the atmosphere for air intake. An adjustable high-pressure flow of gas or vapor is introduced to the primary exhaust chute below the decomposer grate to create a low pressure flow above the grate and which upon ignition, cause flames to be pulled into the pellet mass on the grate. In operation, air from the primary air intake maintains hot charcoal in the primary combustion area, and the secondary combustion area provides a steady flow of wood gas that mixes with a predetermined or adjustable amount of air supplied by the secondary air intake to maintain the flame. The super heated gasses and any ash are provided to the grill or stove by means of the exhaust chute. For cleaning purposes, an electrical/mechanical device may be provided to move the decomposer grate or to provide a sudden burst of high gas pressure.

A flame heat regulating apparatus for a cooktop of a gas stove, comprising an inner hollow shell and an outer wall which are both placed onto the stove cooktop. The shell further positioned to surround a gas burner is arcuate in shape, having a smaller sized bottom side and a larger sized top side. A plurality of air passages are through the shell, wherein the air passages are more densely distributed onto a lower part of the shell, as compared with the air passages which are less densely distributed onto an upper part of the shell. The outer wall further positioned to surround the shell is comprised of a plurality of air passages which are evenly distributed therethrough. In addition, a plurality of extensions projecting upwardly are spaced on a top side of the wall to support a cookware. Application of the flame heat regulating apparatus enables increase of heating efficiency of the flame in cooking, and prevents undesirable heating of a handle of the cookware.

An on-line method and a device for cleaning of contamination such as caking or slag deposits from surfaces in vessels and combustion installations by means of blasting technology. An explosive gas mixture is made to detonate in the proximity of the deposits and thereby clean the deposits from the surfaces.

An adjustable grate is described herein that may be easily adjusted to fit within variously sized grills. The adjustable grate includes a main plate having a plurality of fingers extending from a front side and a rear side. A front slide plate has a plurality of fingers that slidably engage with the fingers on the front side of the main plate. A rear slide plate has a plurality of fingers that slidably engage with the fingers on the rear side of the main plate. The front slide plate, the rear slide plate and the main plate define a cooking surface. The front slide plate and the rear slide plate may be slidably adjusted with respect to the main plate to expand or contract the cooking surface.

An adjustable foot assembly for a pan support of a home appliance is provided. The assembly includes a first bushing having an inside threaded surface on an inner surface, and outside threaded surface on an outer surface; a set screw having an outside threaded surface on an outer surface, the outside threaded surface of the set screw engaging the inside threaded surface of the first bushing such that the set screw is movable relative to the first bushing along a first direction; and a contact foot attached to the first bushing. The first bushing and the set screw are adapted to allow the set screw to be moved relative to the first bushing as the set screw is moved into contact with the pan support, the relative movement being allowed by the outside threaded surface of the set screw moving relative to the inside threaded surface of the first bushing.

A fire pit includes an engine having at least one wall defining an inner chamber. At least one primary air aperture is defined through the inner chamber wall at a first, lower level, and at least one secondary air aperture is defined through the inner chamber wall at a second, upper level. A fuel grate is supported within the inner chamber at a level between the lower level and the upper level.

An improved burnpot assembly for a stove which allows clinker to be removed from the burnpot while simultaneously maintaining combustion includes a burnpot holder having an immovable floor, a burnpot movably supported on the burnpot holder, the burnpot including a front wall and an opposite back wall. The burnpot is movable with respect to the floor between a normal fuel burning position in which the walls of the burnpot and the immovable floor define a burnpot for combustion and a clinker removal position in which the burnpot is disposed laterally adjacent the immovable floor to allow clinker to drop from between the walls of the burnpot, such as into a clinker collection pan near the bottom of the stove.

A campfire support unit for burning firewood. The unit has a metal frame that includes a metal support ring with metal tabs and support legs. The frame is made and arranged to support wood for a wood fire in a near-vertical ring position around a central core which contains wood supported in a near-vertical position. An internal core fire is started, using wood placed inside the metal ring. Then wood is leaned against the outer rim of the metal ring. The tabs support the wood leaned against the outer rim, preventing it from falling before, during, and after the outer wood is ignited by the internal core fire.

A furnace includes: a furnace housing; a perforated tray mounted in the furnace housing; and a stirring rod disposed rotatably on the perforated tray. The stirring rod has top and bottom ends, two opposite lateral ends, a middle portion, and opposite first and second portions, each of which extends from the middle portion to a respective one of the lateral ends. Each of the first and second portions has an inclined face that extends between the top and bottom ends of the stirring rod from the respective one of the lateral ends toward the middle portion of the stirring rod, that is inclined relative to the perforated tray, and that faces toward the perforated tray.

The invention provides a grate for a biomass boiler, which can supply air distinctively and is provided with an oxygenation area structure; the grate comprises a grate body for supporting and ventilation, and is characterized by comprising a plurality of rib plates and a plurality of water-cooled wall pipes; the rib plates and the water-cooled wall pipes are sequentially lined at intervals, and the rib plates are provided with vent holes; the density of the vent holes of the rib plates which are close to a feed opening and are far from the feed opening is smaller than the density of the vent holes in the middle part of the rib plates; the middle part of each rib plate is also provided with a plurality of hoods with cavities inside which protrude out of the surface of the rib plate; and the inside cavities of the hoods are communicated with the upper side and the lower side of the rib plate. The grate of the invention can increase an oxidation area but reduce a reduction area when the biomass on the grate is burned, and effectively improve the burning efficiency of the biomass.

There is illustrated a fuel fired brazier for an enclosed granular fuel burning boiler. The brazier has an apertured grate-like brazier base. The brazier base is moved by an actuator from an operative position, retaining fuel in the brazier to a discharge position where ash can fall through a hole. At the same time, fragmentation means, formed by crushing teeth, move across the brazier to trap, for example, a large piece of clinker, between it and the opposed distal wall of the brazier.

A log supporting and guiding apparatus for improved burning, the apparatus comprising: a base which rests on a fireplace floor or fireplace grate, the base comprising a front bar, back bar, a left connecting bar, a right connecting bar, and a plurality of strength reinforcing bars; a plurality of log retaining bars which are functionally attached to the base and angled off of the fireplace floor or fireplace grate; a left upright bar which is perpendicular, functionally attached to the left connecting bar at the bottom of the left upright bar, and closer to the front bar than the back bar; a right upright bar which is perpendicular, functionally attached to the right connecting bar at the bottom of the right upright bar, and closer to the front bar than the back bar; a cross bar which functionally connects the top of the left upright bar with the top of the right upright bar; a c-section bar for holding a log upright, which is functionally attached to the top of the right upright bar; and an inverted c-section bar for holding a log upright, which is functionally attached to the top of the left upright bar.

The invention discloses the guard method of the fire grate of grate-fired furnace used to burn the biological materials, before laying the biological materials on the chain grate by the hopper, first lay a stable substance bed that can not generate chemical reaction with the alkali metals or its oxide in the burnt ash of biological materials through the hopper at the foreside of biological materials hopper, then lay the biological fuel on the narrated stable substance by the hopper. Therefore, using the method of the present invention, the fire grate made by relative low price of the ordinary material can be used, it can effectively protect against corrosion of the grate, avoid burning-out on the high temperature, improve the layout of the wind and combustion conditions of the grate at the same time and greatly reduce the cost of the grate. The specialized devices comprise stable material transportation equipment, cooling equipment, screening equipment and sending-back equipment. Thus the device can make the stable material repeatedly recycled, and lower overall operating costs.

An apparatus 40 for controlling the deposition of feed material, such as coal 24, on a deposition build-up surface 64 subjected to deposition loading of feed material is provided for use in a feeder arrangement having an endless conveyor 42 for conveying feed material to the rotating blades 46 of a distribution rotor 44 for further conveyance of the feed material. The deposition control apparatus 40 controls the deposition on the deposition build-up surface 64 of feed material that has exited the endless conveyor 42 yet has not been conveyed beyond the distribution rotor 44. The deposition control apparatus 40 includes a device for influencing the movement of feed material relative to the deposition build-up surface 64 such that the deposition of feed material on the deposition build-up surface 64 is hindered.

The present application relates to improvements to granular fuel burning boilers such as wood pellet boilers and burners therefor. In particular, there is disclosed a wood pellet boiler having a combustion chamber, wherein an access door for said combustion chamber comprises a wood pellet burner assembly mounted on the interior side thereof. In this way, the wood pellet burner assembly is movable from and into the combustion chamber of the wood pellet boiler when the access door is opened and closed, respectively.