Gas cavity burner

A gas cavity burner, comprising:

• an elongated body comprising two half-shells superposed with each other and conforming an inner mixture and diffusion chamber that receives a combustible and comburent gas,
• wherein both half-shells are formed substantially by symmetrical shapes and the first half-shell comprises a flat perimeter surface and the second half-shell comprises a corrugated perimeter surface,
• wherein said flat perimeter surface is substantially linear over all the longitudinal direction of the burner, and the corrugated perimeter surface of the second half-shell corresponds to at least a length of said flat perimeter surface of the first half-shell,
• wherein said corrugated perimeter surface comprises projections disposed over a length of the perimeter of the second half-shell, said projections extending substantially over all a length of the inner mixture and diffusion chamber,
• wherein every single projection contains at least a single protrusion on each projection surface which defines a spacer creating a respective gap between the flat perimeter surface and the corrugated perimeter surface, said respective gaps defining respective pilot flame ports,
• wherein coupling of both half-shells with consequent coupling of the flat perimeter surface to the corrugated perimeter surface defines the respective gaps for the respective pilot flame ports and cavities for respective primary flame ports.