Gas burner with at least three rings

A gas burner having at least three flame rings, the burner comprising:

• a burner base formed with a inner and outer upwardly open annular base chambers and having a respective gas supply connected to each of the annular base chambers;
• an inner burner provided on the burner base, having its own gas supply, and having gas outlet orifices that create an inner flame ring, and
• an annular outer burner provided on the burner base, surrounding the inner burner, having inner gas outlet orifices (3a) on its inner annular periphery creating an intermediate flame ring, and having outer gas outlet orifices on its outer annular periphery creating an outer flame ring, the annular outer burner has having two coaxial and separate inner and outer annular gas chambers that are downwardly open toward the burner base, the gas outlet orifices of the intermediate flame ring opening into the inner annular gas chamber while the gas outlet orifices of the outer flame ring open into the outer annular gas chamber, each of the separate annular gas chambers of the outer burner being in fluid communication with a respective one of the annular upwardly open gas chambers formed in the burner base.