US Patent 10098500 Barbeque smoker system and method of use

A cooking system includes an upper cooking chamber configured to receive food therein; a lower heating chamber configured to burn fuel therein; a conduit in fluid communication between the upper cooking chamber and the lower heating chamber; a first valve operably associated with the conduit, the first valve being configured to open and close access between the upper cooking chamber and the lower heating chamber; a flue in gaseous communication with both the lower heating chamber and the upper cooking chamber; a second valve operably associated with the flue and the lower heating chamber, the second valve being configured to open and close access between the lower cooking chamber and the flue; and a third valve operably associated with the flue and the lower heating chamber, the second valve being configured to open and close access between the lower cooking chamber and the flue.