# US 9,435,542 B1 · Fireplace unit with internal smoke diversion > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,542 B1 - Document ID: US9435542B1 - Status: Granted - Kind: B1 - Application number: 13/792,606 - Filed: 2013-03-11 - Granted: 2016-09-06 - Earliest claimed: 2011-02-01 - Applicants: Thomas B. Goodson - Inventors: Thomas B. Goodson - Web page: https://patentgrep.com/patent/US9435542B1 ## CPC - F24B 1/189: characterised by air-handling means, i.e. of combustion-air, heated-air, or flue-gases, e.g. draught control dampers (condition responsive controls for regulating combustion F24B1/187; by use of heat exchange means F24B1/188) - F24B 1/181: Free-standing fireplaces, e.g. for mobile homes {; Fireplaces convertible into stoves} - F24B 1/195: Fireboxes; Frames; Hoods; Heat reflectors - F24B: DOMESTIC STOVES OR RANGES FOR SOLID FUELS (for solid fuels in combination with gaseous fuels, liquid fuels or other kinds of energy supply F24C1/02); IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES ## Abstract A fireplace unit includes a pair of spaced apart opposite, upright sidewalls. The sidewalls define an interior compartment of the fireplace unit. The sidewalls each have a forward end and rearward end substantially aligned along lines that converge rearwardly. The sidewalls are one of (1) joined directly together at the rearward ends and (2) joined together at the rearward ends by an upright rear wall having a transverse width that is less than ¾ of the transverse width of each of the sidewalls for at least a majority of the rear wall's length. The upper end of each of the sidewall slopes upward from the forward end toward the rearward end. A floor extends between the sidewalls for closing the lower end of the interior compartment. A cover is coupled to the upper ends of the sidewalls for closing the upper end of the interior compartment. A flue is provided for directing smoke and air out of the interior compartment. A smoke diversion body is provided for forming a smoke flow area constriction. ## Claims ### Claim 1 A fireplace unit comprising: a pair of spaced apart opposite, upright sidewalls, the sidewalls defining an interior compartment that forms a combustion chamber of the fireplace unit wherein the sidewalls are directly exposed to the combustion chamber, the sidewalls each having a forward end and a rearward end substantially aligned along lines that converge rearwardly, the sidewalls being joined together at the rearward ends so that the joined sidewalls have a substantially triangular transverse cross-sectional configuration, the upper end of each of the sidewall sloping upward from the forward end toward the rearward end; a floor that extends between the sidewalls for closing the lower end of the interior compartment; a sloping cover that is coupled to the upper ends of the sidewalls for closing the upper end of the interior compartment, the cover terminating at a position forward of the rearward ends of the sidewalls, the area beneath the sloping cover defining a smoke chamber; a flue having a flue wall that extends upward from the sloping cover, the flue wall defining a flue interior and having a lower opening for directing smoke and air upward through the flue interior from the interior compartment and smoke chamber; and a first smoke diversion body that extends between the sidewalls, the smoke diversion body having a base end located at or adjacent to the rearward ends of the sidewalls and an opposite projecting end that projects away from the base end and into the smoke chamber so that the smoke diversion body forms a constriction of a smoke flow area of the smoke chamber, the smoke diversion body being oriented so that lines of projection extending between the base end and projecting end are located at an angle of from 1° to 90° from a vertical axis extending through and above the base end of the smoke diversion body, and wherein an opening is formed at the base end of the first smoke diversion body to allow materials to pass therethrough. ### Claim 2 (depends on 1) The fireplace unit of claim 1, wherein: there is at least one other smoke diversion body positioned above the first smoke diversion body that has a base end located at or adjacent to at least one of the sloping cover, flue wall or rearward ends of the sidewalls and an opposite projecting end that projects into at least one of the smoke chamber and flue interior, the at least on other smoke diversion body being oriented so that lines of projection of the smoke diversion body extending between the base end and projecting end of the at least one other smoke diversion body are at an angle of from 1° to 90° from a vertical axis extending through and above the base end of the at least one other smoke diversion body. ### Claim 3 (depends on 1) The fireplace unit of claim 1, wherein: the sidewalls are formed from a single piece of material. ### Claim 4 (depends on 1) The fireplace unit of claim 1, wherein: the sidewalls are formed from metal plate materials. ### Claim 5 (depends on 1) The fireplace unit of claim 1, wherein: the lines of projection extending between the base end and projecting end are located at an angle of from 25° to 75° from a vertical axis extending through and above the base end. ### Claim 6 (depends on 1) The fireplace unit of claim 1, wherein: the smoke diversion body facilitates constriction of a smoke flow area within the smoke chamber by 50% or more as measured along the lines of projection relative to the smoke flow area without the smoke diversion body. ### Claim 7 (depends on 1) The fireplace unit of claim 1, wherein: at least one of the sidewalls is vented to allow airflow through the sidewall into the interior compartment. ### Claim 8 (depends on 1) The fireplace unit of claim 1, wherein: the floor is a removable floor. ### Claim 9 (depends on 1) The fireplace unit of claim 1, further comprising: face frame side members that are coupled to the forward ends of the sidewalls. ### Claim 10 (depends on 1) The fireplace unit of claim 1, wherein: the sidewalls are planar and converge toward the rearward ends about a substantially vertical axis. ### Claim 11 (depends on 1) The fireplace unit of claim 1, wherein: the smoke diversion body has a thermal conductivity (k) of 10 W/m·° C. or more at 25° C. ### Claim 12 (depends on 1) The fireplace unit of claim 1, wherein: the smoke diversion body has a generally planar lower surface. ### Claim 13 A fireplace unit comprising: a pair of spaced apart opposite, upright sidewalls, the sidewalls defining an interior compartment that forms a combustion chamber of the fireplace unit wherein the sidewalls are directly exposed to the combustion chamber, the sidewalls each having a forward end and a rearward end substantially aligned along lines that converge rearwardly, the sidewalls being joined together at the rearward ends so that the joined sidewalls have a substantially triangular transverse cross-sectional configuration, the upper end of each of the sidewall sloping upward from the forward end toward the rearward end; a floor that extends between the sidewalls for closing the lower end of the interior compartment; a sloping cover that is coupled to the upper ends of the sidewalls for closing the upper end of the interior compartment, the cover terminating at a position forward of the rearward ends of the sidewalls, the area beneath the sloping cover defining a smoke chamber; a flue having a flue wall that extends upward from the sloping cover, the flue wall defining a flue interior and having a lower opening for directing smoke and air upward through the flue interior from the interior compartment and smoke chamber; and a first smoke diversion body has a thermal conductivity (k) of 10 W/m·° C. or more at 25° C. that extends between the sidewalls, the smoke diversion body having a base end located at or adjacent to the rearward ends of the sidewalls and an opposite projecting end that projects away from the base end and into the smoke chamber so that the smoke diversion body forms a constriction of a smoke flow area of the smoke chamber, the smoke diversion body being oriented so that lines of projection extending between the base end and projecting end are located at an angle of from 1° to 90° from a vertical axis extending through and above the base end of the smoke diversion body, the smoke diversion body having a generally planar lower surface, the smoke diversion body facilitating constriction of a smoke flow area within the smoke chamber by 50% or more as measured along the lines of projection relative to the smoke flow area without the smoke diversion body, and wherein an opening is formed at the base end of the smoke diversion body to allow materials to pass therethrough. ### Claim 14 (depends on 13) The fireplace unit of claim 13, wherein: there is at least one other smoke diversion body positioned above the first smoke diversion body that has a base end located at or adjacent to at least one of the sloping cover, flue wall or rearward ends of the sidewalls and an opposite projecting end that projects into at least one of the smoke chamber and flue interior, the at least on other smoke diversion body being oriented so that lines of projection extending between the base end and projecting end of the at least one other smoke diversion body are at an angle of from 1° to 90° from a vertical axis extending through and above the base end of the at least one other smoke diversion body. ### Claim 15 (depends on 13) The fireplace unit of claim 13, wherein: the sidewalls are formed from a single piece of material. ### Claim 16 (depends on 13) The fireplace unit of claim 13, wherein: at least one of the sidewalls is vented to allow airflow through the sidewall into the interior compartment. ### Claim 17 (depends on 13) The fireplace unit of claim 13, wherein: the lines of projection extending between the base end and projecting end are located at an angle of from 25° to 75° from a vertical axis extending through and above the base end. ### Claim 18 (depends on 13) The fireplace unit of claim 13, wherein: the floor is a removable floor. ### Claim 19 (depends on 13) The fireplace unit of claim 13, wherein: face frame side members that are coupled to the forward ends of the sidewalls. ### Claim 20 (depends on 13) The fireplace unit of claim 13, further comprising: the sidewalls are planar and converge toward the rearward ends about a substantially vertical axis.