A furnace for combusting wood comprises a firebox floor in a primary burn chamber of the furnace, where the wood is received for generating a gas therefrom, that is defined by a thermally conductive body of refractory material. The body of refractory material defines an upper support surface arranged to support the wood above or over the same. The body of refractory material also defines, beneath the upper support surface, a duct as part of a secondary burn chamber of the furnace which is arranged (i) to be communicated with the primary burn chamber of the furnace to receive the gas generated by heating of the wood therein and carrying combustible products, and (ii) to convey the gas in a manner supporting combustion of the combustible products carried thereby.

Various embodiments of a vortex hybrid motor are described herein. In some embodiments, the vortex hybrid motor may include a combustion zone defined by a fuel core and/or motor housing. The combustion zone may include an upper zone and a central zone that each contribute to thrust created by the vortex hybrid motor. In some embodiments, an injection port configuration is described that includes a proximal injection port that may be controlled for modulating a delivery of an amount of oxidizer for adjusting an oxidizer-to-fuel ratio. In some embodiments, a fuel core configuration is described that provides radially varying gradients of fuel in order to achieve desired thrust profiles. In some embodiments, the fuel core may include a support structure and/or a proximal end of a nozzle of the vortex hybrid motor may extend into the fuel core.

The heater assembly includes a case having a heating element therein, a channel extending through the case and having a size and shape for selectively receiving therethrough a first end of an elastomeric fixture outstretched through a substrate to a first length having a first width, and a heat transfer surface positioned relative to the heating element for receiving generated heat therefrom. The heat transfer surface is generally positionable relative to the substrate to cooperate with an adhesively bondable attachment coupled to a second end of the elastomeric fixture opposite the first end and including an uncured bonding agent disposed thereon. The heater assembly and attachment simultaneously sandwich the substrate in compression engagement in between when the elastomeric fixture extends through the substrate into the central channel and relaxes to a second relatively shorter length having a second relatively larger width.

The heater assembly includes a case having a heating element therein, a channel extending through the case and having a size and shape for selectively receiving therethrough a first end of an elastomeric fixture outstretched through a substrate to a first length having a first width, and a heat transfer surface positioned relative to the heating element for receiving generated heat therefrom. The heat transfer surface is generally positionable relative to the substrate to cooperate with an adhesively bondable attachment coupled to a second end of the elastomeric fixture opposite the first end and including an uncured bonding agent disposed thereon. The heater assembly and attachment simultaneously sandwich the substrate in compression engagement in between when the elastomeric fixture extends through the substrate into the central channel and relaxes to a second relatively shorter length having a second relatively larger width.

The presently disclosed embodiments include a burner assembly for a cooking appliance that features a pullout including a removable burn pot. The pullout allows a user to easily remove the burn pot to empty burned ash and clean any residual materials from the burn pot. The pullout features a keyway design to aid in retention and easy removal from a cooking appliance. The pullout couples to a fuel chamber that houses an auger for supplying a fuel source and an ignitor. The pullout includes a gasket that provides a sealing engagement between the pullout and the cooking appliance.

A cooking apparatus suitable for outdoor use including a substantially ellipsoid or ovoid housing which at least partially defines a cooking area within the same. The housing is substantially formed from aluminium.

A cooking apparatus suitable for outdoor use including a substantially ellipsoid or ovoid housing which at least partially defines a cooking area within the same. The housing is substantially formed from aluminium.

A fire stump holds firewood and similar combustibles in a near-vertical stable position. Firewood is end-stacked upon a ground engaging base, further stabilizing the base. An upper generally planar firewood support is inset interiorly from the base, providing sufficient tilt to hold a plurality of stacked wood in an inverted funnel configuration. The upper firewood support has a perforate center defining a chimney hole and a perimeter defining a plurality of concave arcuate cut-outs that serve as firewood supports. A riser extends between the ground engaging base and upper firewood support, holding the two in parallel but vertically offset planes. In a most preferred embodiment, the ground engaging base and upper firewood support are stamped from a common sheet of metal, with the upper firewood support circumscribed in the original sheet of metal by the ground engaging base.

A fire stump holds firewood and similar combustibles in a near-vertical stable position. Firewood is end-stacked upon a ground engaging base, further stabilizing the base. An upper generally planar firewood support is inset interiorly from the base, providing sufficient tilt to hold a plurality of stacked wood in an inverted funnel configuration. The upper firewood support has a perforate center defining a chimney hole and a perimeter defining a plurality of concave arcuate cut-outs that serve as firewood supports. A riser extends between the ground engaging base and upper firewood support, holding the two in parallel but vertically offset planes. In a most preferred embodiment, the ground engaging base and upper firewood support are stamped from a common sheet of metal, with the upper firewood support circumscribed in the original sheet of metal by the ground engaging base.

The invention relates to a combustion device for burning fuel such as wood, wood chips, wood pellets, or the like, wherein the combustion device comprises a first chamber and a second chamber, wherein the second chamber is arranged underneath the first chamber and the first chamber receives the fuel, wherein the first chamber comprises, at the bottom, an intermediate layer of combustible material which holds the fuel in the first chamber as long as the intermediate layer is not damaged or destroyed by combustion and such that, following damage to or destruction of the intermediate layer, fuel located in the first chamber falls into the second chamber, wherein, during the combustion process in the first chamber, substantially gas combustion is caused and, after the fuel has been conveyed into the second chamber, coal burning preferably occurs, or the fuel may be removed from the second chamber through an opening.