Non-gas fire pit

Patent metadata

Field	Value
Publication number	US-11953198-B2
Application number	US-202017088300-A
Country	US
Kind code	B2
Filing date	Nov 3, 2020
Priority date	Sep 21, 2018
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

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.

First claim

What is claimed is:

1. A fire pit comprising:
a combustion chamber having at least one wall defining an inner chamber and further comprising a pair of spaced apart end walls and a pair of spaced apart side walls, the pair of spaced apart side walls and pair of spaced apart end walls defining the inner chamber therebetween;
at least one primary air aperture defined through the inner chamber wall at a first, lower level;
at least one secondary air aperture defined through the inner chamber wall at a second, upper level;
a fuel grate supported within the inner chamber at a level between the lower level and the upper level; and
a shroud surrounding the combustion chamber and spaced apart therefrom to form an intake chamber;
wherein solid fuel supported by the fuel grate, when combusted, is provided primary combustion air from below the fuel grate by the primary air apertures and provided secondary combustion air from above the solid fuel by the secondary air apertures, the secondary combustion air promoting combustion of unburned gasified combustibles rising within the inner chamber;
wherein the pair of spaced apart side walls and pair of spaced apart end walls form a parallelepiped configuration; and
wherein the shroud has a parallelepiped configuration with a taper opposite a taper of the combustion chamber.

2. The fire pit of claim 1 , wherein the pair of spaced apart end walls are angled together toward a top of the combustion chamber.

3. The fire pit of claim 1 , wherein the pair of spaced apart side walls are angled together toward a top of the combustion chamber.

4. The firepit of claim 1 , wherein the shroud further defines at least one aperture for admitting air to the intake chamber from outside the fire pit.

5. The firepit of claim 1 , wherein the fuel grate comprises at least one ridge extending upwardly therefrom.

6. A fire pit comprising:
a combustion chamber having at least one wall defining an inner chamber;
at least one primary air aperture defined through the inner chamber wall at a first, lower level;
at least one secondary air aperture defined through the inner chamber wall at a second, upper level;
a fuel grate supported within the inner chamber at a level between the lower level and the upper level;
a shroud surrounding the at least one wall and being spaced apart therefrom to define an intake chamber;
wherein solid fuel supported by the fuel grate, when combusted, is provided primary combustion air from below the fuel grate by the primary air apertures and provided secondary combustion air from above the solid fuel by the secondary air apertures, the secondary combustion air promoting combustion of unburned gasified combustibles rising within the inner chamber;
wherein the at least one wall is formed into a frustoconical configuration with a narrower upper end and a wider bottom end;
wherein the shroud defines at least one aperture for admitting air to the intake chamber from outside the firepit; and
wherein the shroud comprises a frustoconical configuration with a taper opposite a taper of the at least one inner wall.

Assignees

• Lamplight Farms Inc

Inventors

• Harrington Steven Merrill
• Sawalski Michael
• Butrym Ryan
• Woodruff Robert
• Kramka Joel
• Piunti Megan
• Caruthers Montel

Classifications

• F23B20/00 Primary

  Combustion apparatus specially adapted for portability or transportability · CPC title

• F23B60/02

  with combustion air supplied through a grate · CPC title

• F23L9/02

  by discharging the air above the fire · CPC title

• F24B3/00 Primary

  Heaters not covered by group F24B1/00, e.g. charcoal braziers · CPC title

• F24B5/026

  Supply of primary and secondary air for combustion · CPC title