# US 12,018,842 B1 ยท Stove with self-air drawing and heating for primary burn > Agents: this data is available as JSON from the patentgrep API and MCP server โ€” see https://patentgrep.com/llms.txt - Number: US 12,018,842 B1 - Document ID: US12018842B1 - Status: Granted - Kind: B1 - Application number: 18/106,835 - Filed: 2023-02-07 - Granted: 2024-06-25 - Earliest claimed: 2023-02-07 - Assignees: Knowledge Makers LLC - Applicants: Knowledge Makers LLC - Inventors: Liya W. F. Luk; Yan-Yeung Luk - Web page: https://patentgrep.com/patent/US12018842B1 ## CPC - F24C 15/006: {Arrangements for circulation of cooling air} - F24C 1/00: Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified - F24C 15/12: Side rests; Side plates; Cover lids; Splash guards; Racks outside ovens, e.g. for drying plates - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION ## Abstract A stove including spiraling walls to create multiple vertical inlets, spiraling layers of spaces that can self-draw and self-heat the air from outside of the stove into the burn zone, and a rim that covers the top area of the spiraling walls and leaves an opening above the fire. From burning, a convection draft draws air from the side-environment of the stove through the vertical inlets to circulate in the spiraling layered space, and to supply to the fire horizontally. The circling of air will be heated by the fire through conduction and irradiation. This design enables extra heated air directly for an enhanced primary burn. The stove can include side walls of different profiles, e.g., straight, tilted and curved walls and different spiraling profiles of spiraling layered spaces, e.g., linear, exponential, and exponential-polynomial. ## Claims ### Claim 1 A stove comprising: (a) at least one spiral wall configured to wind outwardly a number of turns to form an opening, said at least one spiral wall configured to be disposed in an arrangement to form at least one starting gap between two successive walls formed of said at least one spiral wall at an outer periphery of said at least one spiral wall, said at least one starting gap continues through a path to an ending gap between two successive walls formed of said at least one spiral wall at said opening; and (b) a cover comprising an opening, said cover configured to be disposed atop said at least one spiral wall to contain said path, leaving said opening of said cover to match said opening of said at least one spiral wall, wherein a combustion within said opening of said at least one spiral wall, draws air for combustion through said at least one starting gap, said path and said at least one ending gap into said opening of said at least one spiral wall. ### Claim 2 (depends on 1) The stove of claim 1, wherein said at least one spiral wall is constructed from a material selected from the group consisting of stainless steel, metal, fire refractory material, fireclay refractory material, high alumina refractory material, silica brick, magnesite refractory material, chromite refractory material, zirconia refractory material, insulating material, monolithic refractory material and any combinations thereof. ### Claim 3 (depends on 1) The stove of claim 1, wherein said number of turns of said at least one spiral wall is at least about two turns. ### Claim 4 (depends on 1) The stove of claim 1, wherein said at least one spiral wall is a structure disposed in a round shape, a polygonal shape and a dome shape. ### Claim 5 (depends on 1) The stove of claim 1, wherein said starting gap further comprises a top starting gap and a bottom starting gap and each said ending gap further comprises a top ending gap and a bottom ending gap, wherein said top starting gap is smaller than said bottom starting gap and said top ending gap is smaller than said bottom ending gap. ### Claim 6 (depends on 1) The stove of claim 1, further comprising a base configured to be disposed at the bottom of said at least one spiral wall to further contain said path. ### Claim 7 (depends on 1) The stove of claim 1, wherein said at least one spiral wall comprises a thickness of at least about 1/32 inch. ### Claim 8 (depends on 1) The stove of claim 1, wherein said path comprises a cross-sectional profile having an aspect ratio of about 1/40 to about โ…•. ### Claim 9 (depends on 1) The stove of claim 1, wherein said at least one spiral wall comprises a profile selected from the group consisting of a linear profile, an exponential profile, an exponential-polynomial profile and any combinations thereof. ### Claim 10 (depends on 1) The stove of claim 1, wherein said at least one spiral wall leans inwardly. ### Claim 11 A stove comprising: (a) at least two spiral walls, a first spiral wall of said at least two spiral walls configured to wind outwardly a number of turns and a second spiral wall of said at least two spiral walls configured to wind outwardly a number of turns to form an opening together, said at least two spiral walls configured to be disposed in an arrangement to form at least two starting gaps each between two successive walls formed of said at least two spiral walls, each said at least two starting gaps continues through a path to each of at least two ending gaps each between two successive walls formed of said at least two spiral walls; and (b) a cover comprising an opening, said cover configured to be disposed atop said at least two spiral walls to contain said path, leaving said opening of said cover to match said opening of said at least two spiral walls, wherein a combustion within said opening of said at least two spiral walls, draws air for combustion through each said starting gap, each said path and each said ending gap. ### Claim 12 (depends on 11) The stove of claim 11, wherein said at least two spiral walls are each constructed from a material selected from the group consisting of stainless steel, metal, fire refractory material, fireclay refractory material, high alumina refractory material, silica brick, magnesite refractory material, chromite refractory material, zirconia refractory material, insulating material, monolithic refractory material and any combinations thereof. ### Claim 13 (depends on 11) The stove of claim 11, wherein each of said number of turns of said first spiral and said number of turns of said second spiral is at least about two turns. ### Claim 14 (depends on 11) The stove of claim 11, wherein said at least two spiral walls are configured to form a structure selected from a shape consisting of a round shape, a polygonal shape and a dome shape. ### Claim 15 (depends on 11) The stove of claim 11, wherein each said starting gap further comprises a top starting gap and a bottom starting gap and each said ending gap further comprises a top ending gap and a bottom ending gap, wherein each said top starting gap is smaller than each said bottom starting gap and each said top ending gap is smaller than each said bottom ending gap. ### Claim 16 (depends on 11) The stove of claim 11, further comprising a base configured to be disposed at the bottom of said at least two spiral walls to further contain each said path. ### Claim 17 (depends on 11) The stove of claim 11, wherein each said at least two spiral walls comprises a thickness of at least about 1/32 inch. ### Claim 18 (depends on 11) The stove of claim 11, wherein each of said at least two spiral walls comprises a profile selected from the group consisting of a linear profile, an exponential profile, an exponential-polynomial profile and any combinations thereof. ### Claim 19 (depends on 11) The stove of claim 11, wherein each of said at least two spiral walls leans inwardly. ### Claim 20 (depends on 11) The stove of claim 11, wherein said path comprises a cross-sectional profile having an aspect ratio of about 1/40 to about โ…•.