Abstract: A gas burner (1) comprises a support plate (2) with a passage opening (8) for the gas and an annular wall (11) formed around the passage opening (8), a diffusing wall (19) and a further flow element (20,21,22) inserted on the annular wall (11) in flow communication with the passage opening (8), wherein the annular wall (11) forms a plurality of punches (16) with a recess (17) and an opposite projection (23), wherein the recess (17) accommodates a locking protuberance (25) of the diffusing wall (19) and the projection (23) extends in a locking hole (24) of the further flow element (20, 21, 22).

Abstract: A gas burner (1) comprises a support plate (2) with a passage opening (8) for the gas and an annular wall (11) formed around the passage opening (8), a diffusing wall (19) and a further flow element (20,21,22) inserted on the annular wall (11) in flow communication with the passage opening (8), wherein the annular wall (11) forms a plurality of punches (16) with a recess (17) and an opposite projection (23), wherein the recess (17) accommodates a locking protuberance (25) of the diffusing wall (19) and the projection (23) extends in a locking hole (24) of the further flow element (20, 21, 22).

Abstract: A burner comprises a tubular diffuser wall and an inlet passage for a gas mixture into the diffuser wall, as well as a first diaphragm with one or more first through openings and a second diaphragm with one or more second through openings of different shape and distribution from those of the first through openings, said first and second diaphragms being substantially concentric and arranged in sequence in the inlet passage.

Abstract: A gas burner for a heater comprises a planar metal frame portion with an elongated opening defined by two longitudinal edges and by two transversal end edges, as well as a combustion membrane in the form of a tridimensional shell, connected to the frame portion along the longitudinal and transversal edges, wherein the combustion membrane has a diffuser layer, which forms an outer combustion surface made of a perforated metal sheet, and which extends between the two longitudinal edges with a single curvature out of the plane of the frame portion, and two closure portions made of metal sheet extending from the transversal edges out of the plane of the frame portion and which close end areas between the diffuser layer and the transversal edges of the frame portion.

Abstract: A burner comprises a tubular diffuser wall and an inlet passage for a gas mixture into the diffuser wall, as well as a first diaphragm with one or more first through openings and a second diaphragm with one or more second through openings of different shape and distribution from those of the first through openings, said first and second diaphragms being substantially concentric and arranged in sequence in the inlet passage.