US Patent 11172688 Gravity fed smoker

A gravity fed smoker includes a smoking enclosure and an external stack. The stack is double walled with an inner wall, and an outer wall. A vented cooling space exists between the inner wall and the outer wall. An inner chamber of the external stack includes a fire box with a fire grate and a feed hopper positioned above the fire box. A smoke tunnel with a series of openings for releasing smoke into the smoking enclosure extends along the bottom of the food smoking enclosure and is connected to the external fire box at one end. Fuel, including charcoal, lump coal, or wood pellets, is loaded into the feed hopper. As the fuel burns on the fire grate and turns to ashes, the fuel is fed from the hopper onto the fire grate by gravity. A fan and dampers controls air flow through the fire grate and into the smoke tunnel.