Smokeless multi-fuel portable stoves with reversible cooking attachment

Abstract

A portable stove is provided. The stove includes a body with an exterior wall, a bottom with foldable legs attached to it, and a top with an opening to which can be affixed a reversible cooking attachment, the cooking attachment having an outward orientation and an inward orientation. Inside the walls of the stove body are an electronics housing, an electric fan with an adjustable speed above the electronics housing, a shield above the fan, a removable ash pan above the shield, and a burn chamber with a fire grate above the ash pan. The cooking attachment further includes a mounting ring and foldable arms which are connected by a collar. The collar projects up from the stove in the outward orientation and into the stove in the inward orientation. The mounting ring has a rounded lip. Each foldable arm has a supporting side with dogs and an angled tip.

What is claimed is: 
     
         1 . A portable stove, comprising:
 a body, including:
 exterior walls having ventilation holes, 
 a bottom, 
 foldable legs attached to the bottom, 
 a top having an opening; 
   a reversible cooking attachment having an outward orientation and an inward orientation, including:
 a collar which projects up from the stove top in the outward orientation to support a cooking vessel wider than the collar, and projects into the stove body in the inward orientation for storage and to support a cooking vessel narrower than the collar, 
 a mounting ring for removably affixing the attachment to the opening at the top of the stove body, the ring having a rounded lip for creating a downdraft and redirecting smoke back into the stove body, and 
 foldable arms having a supporting side with dogs and an angled tip, the arms extending away from the opening in the outward orientation such that the supporting sides are configured to be in contact with a bottom of the wider cooking vessel such that the dogs are configured to assist in holding the wider vessel above the stove, and the arms folding within a circumference of the stove top opening in the inward orientation, such that the arms occupy a space within the collar and the arms' angled tips are coplanar with—and configured to act as supports of—a bottom of the narrower cooking vessel, 
 wherein the collar connects the arms to the mounting ring; 
   an electronics housing located inside and at the bottom of the stove body, including:
 an external power connector, 
 a battery box, and 
 an exterior hatch configured to provide access to the battery box through the bottom of the stove; 
   an electric fan above the electronics housing, the fan including:
 an electrical connection to a circuit that controls the fan's speed; 
   a shield above the fan;   a removable ash pan above the shield;   a burn chamber above the ash pan, including:
 a fire grate that allows ashes to fall into the ash pan, and 
 an interior wall having ventilation holes; 
   wherein the electric fan, the shield, the ash pan, the firebox, and the burn chamber are inside the walls of the stove body.   
     
     
         2 . The stove of  claim 1 , wherein the stove body has a rectangular cross-section. 
     
     
         3 . The stove of  claim 1 , wherein each of the foldable legs has a folded position and an extended position, and in the extended position the legs create a clearance beneath the stove bottom that is between five and twenty percent of a height of the stove body. 
     
     
         4 . The stove of  claim 1 , wherein the collar has ventilation holes. 
     
     
         5 . The stove of  claim 1 , wherein the shield has a conical shape configured to create a vortex air flow within the stove body. 
     
     
         6 . The stove of  claim 1 , wherein the circuit that controls the fan's speed comprises a rheostat with a user interface positioned at the exterior wall of the stove body. 
     
     
         7 . The stove of  claim 1 , wherein the external power connector comprises a USB-C port. 
     
     
         8 . The stove of  claim 1 , wherein the external power connector comprises an input port configured to draw power to the stove's electric fan from a power source connected to the input port, and an output port configured to provide power to an electrical component connected to the output port. 
     
     
         9 . The stove of  claim 1 , wherein the stove body further comprises a middle wall between the exterior wall of the body and the interior wall of the burn chamber, the middle wall having ventilation holes, and wherein the electric fan, the shield, the ash pan, and the burn chamber are contained within the middle wall of the stove body. 
     
     
         10 . The stove of  claim 1 , wherein the stove has an on/off indicator light. 
     
     
         11 . The stove of  claim 1 , wherein the ash pan has a handle that is accessible on the exterior wall of the stove. 
     
     
         12 . The stove of  claim 1 , wherein the angled tips of the foldable arms each have an angle between forty and eighty degrees, as measured from a back side that is opposite to the supporting side with dogs, this angle designed to allow the tip to form a surface which is coplanar with the bottom of the narrower cooking vessel and assist in supporting it when the arm is folded into the inward position. 
     
     
         13 . The stove of  claim 1 , wherein the inward orientation of the reversible cooking attachment has a clearance from the bottom of the burn chamber to a bottom of a cooking vessel supported by the foldable arms, the clearance measuring between one and one and a half inches. 
     
     
         14 . The stove of  claim 1 , wherein the mounting ring has a notch to allow the ring to secure to a vertical retaining element at the opening of the stove body. 
     
     
         15 . The stove of  claim 1 , wherein the rounded lip has an angle between twenty- and forty-degrees with respect to the top. 
     
     
         16 . A portable stove, comprising:
 an enclosure, including:
 a bottom, 
 foldable legs attached to the bottom, 
 a top having an opening, 
 an outer wall having ventilation holes, 
 a middle wall having ventilation holes; 
   an electronics housing located inside and at the bottom of the middle wall of the enclosure, including:
 a power connector, 
 a battery box, and 
 a hatch configured to provide access to the battery box through the bottom of the stove; 
   a fan above the housing, the fan including:
 an adjustable speed, and 
 an electrical connection to a circuit that controls the fan's speed; 
   a conical shield above the fan;   a removable firebox above the shield, configured to hold a fire-starting material;   a burn chamber above the firebox, including a grate configured to hold a fuel and an interior wall with ventilation holes; and   a detachable holder above the burn chamber having a cup orientation and a pot orientation, including:
 a collar with ventilation holes, the collar projecting up from the stove top in the pot orientation and projecting into the stove enclosure in the cup orientation, 
 a ring for affixing the holder to the stove top in either the cup orientation or the pot orientation, the ring having a notch and a lip angled over the opening of the stove top, and 
 arms, each arm having a supporting side with dogs and an angled tip, the arms folding out from the collar in the pot orientation such that the supporting sides with dogs are face up, and the arms folding into the collar in the cup orientation such that the supporting sides with dogs are face down, 
   wherein the collar connects the arms to the ring,   wherein the fan, shield, and firebox are located inside the middle wall of the enclosure.   
     
     
         17 . The stove of  claim 16 , wherein each of the foldable legs has a folded position and an extended position, and in the extended position the legs create a clearance beneath the stove bottom that is between five and twenty percent of a height of the stove enclosure. 
     
     
         18 . The stove of  claim 16 , wherein the angled tip of each arm has an angle between forty and eighty degrees, as measured from a back side that is opposite to the supporting side with dogs, the angle designed to allow the tip to form a surface that is coplanar with the bottom of a narrower cooking vessel and assist in supporting it when the arm is folded into the cup position. 
     
     
         19 . The stove of  claim 16 , wherein the lip of the ring has an angle between twenty- and forty-degrees with respect to the top. 
     
     
         20 . The stove of  claim 16 , wherein the power connector comprises an input port configured to draw power to the stove's fan from a power source connected to the input port, and an output port configured to provide power to an electrical component connected to the output port.