Patent ID: 6857870

Claim:
A combustion system for use in a gas burning heater, the combustion system comprising: a circularly-shaped burner tube having a plurality of gas exit holes on one side and a means for feeding a controlled amount of gas thereto, said burner tube having a set diameter; a first conical frustum section having a pre-determined first pattern of orifice ports, the first conical frustum section having a basal end and a smaller diameter distal end, the basal end of the first conical frustum section being concentrically attached to the burner tube adjacent to said plurality of gas exit holes at a position radially inward from said gas exit holes, said distal end of the first conical frustum section extending generally in the direction in which the gas would exit said gas exit holes; and a second conical frustum section having a pre-determined second pattern of orifice ports, said second conical frustum section having a basal end and a larger diameter distal end, said basal end of the second conical frustum section concentrically attached to the burner tube adjacent to said plurality of gas exit holes at a position radially outward from said gas exit holes, said distal end of the second conical frustum reaction extending generally in the direction in which the gas would exit said gas exit holes.