Patent ID: 6905328

Claim:
A low NO x burner nozzle assembly comprising: an elongated hollow burner tube providing a longitudinally extending conduit for supplying a mixture of fuel and air to a combustion zone, said burner tube having an outer wall surrounding said conduit, a longitudinally extending central axis, an inlet end and an outlet end; a discharge nozzle located at the outlet end of the burner tube, said discharge nozzle being in direct communication with said conduit and configured and arranged for receiving at least a portion of said mixture of fuel and air from the conduit and directing the same into said combustion zone; an inlet for a mixture of fuel and air at the inlet end of the burner tube; an air passageway located outside the outer wall of the burner tube for supplying air to said combustion zone; and at least one port extending through said outer wall at a location between the discharge nozzle and said inlet end of the conduit, said port communicating with the air passageway, whereby to facilitate the passage of a portion of said mixture of fuel and air from the conduit and into said air passageway for admixture with air flowing through the air passageway.