A gas burner for cooking appliances includes a cup-shaped lower support structure to be applied in a position corresponding with an opening made in the sheet metal of a cooking hob, an injector of substantially horizontal axis, applied to a lateral wall of a first cavity provided in the support structure, a substantially horizontal venturi conduit coaxial with the injector and opening at its downstream end into a second cavity provided in the support structure, open upwards, and communicating fluidly with a distribution chamber for the combustion mixture to generate a flame ring, wherein the venturi conduit includes a tubular element separate from the support structure, housed to undergo free axial movement within a corresponding seat provided in the support structure and lockable in the desired axial position by a locking member accessible from above the support structure through the opening provided in the sheet metal of the cooking hob.

A cooktop appliance includes a gas burner assembly positioned on a panel of the cooktop appliance at a top surface of the panel. The gas burner assembly includes a grate configured for supporting a cooking utensil. The grate defines an internal fuel passage. The internal fuel passage of the grate extends to a burner such that fuel is directed to the burner via the internal fuel passage of the grate.

A gas burner (100) comprises: a body (B), a supply unit (A) and a lid (3) having a central flame crown (C1) and a peripheral flame crown (C2). The supply unit (A) comprises: at least one supply duct (1, 2), three injectors (I1, I2, I3) connected to said at least one supply duct (1, 2), three Venturi tubes (V1, V2, V3) respectively associated with said injectors (I1, I2, I3), wherein the injectors (I1, I2, I3) and the Venturi tubes (V1, V2, V3) have parallel horizontal axes (X1, X2, X3) and fixing means (4) used to fix the Venturi tubes (V1, V2, V3) in position. The body (B) of the burner comprises a central chamber (91) and two peripheral chambers (51, 61) in communication with said Venturi tubes (V1, V2, V3) and with an upper central chamber (92) and an upper peripheral chamber (7) respectively disposed under the central flame crown (C1) and the peripheral flame crown (C2).

A burner cover for a gas burner includes a disk-shaped base segment, and an annular gas distribution segment which is connected to the base segment. The gas distribution segment has first gas distribution channels, which extend radially from an inner surface of the gas distribution segment toward an outer edge of the base segment. Each first gas distribution channel extends through the gas distribution segment and has a T-shaped cross-sectional geometry, which is open in a direction pointing away from the base segment.

A burner comprising a base cup, an annular flame splitter, and a flame cover. The base cup comprises an air inlet channel) and two nozzles in communication with the air inlet channel and arranged upwards. The annular flame splitter arranged on the base cup comprises two Venturi tubes respectively arranged opposite the two nozzles. The annular flame splitter is separated from the base cup to form a gap, thus allowing primary air to enter the two Venturi tubes from the gap to be mixed with a fuel gas sprayed into the two Venturi tubes by the two nozzles to form a gaseous mixture. Groove openings are formed on the top of the annular flame splitter in communication with the mixing cavity. The flame cover covers the mixing cavity and limits the groove openings to define the outlet for the gaseous mixture, thus forming a flame ring.

A gas burner for a cooking appliance is a gas burner including a head, an injector holder, a Venturi tube, and an injector, wherein a pair of first Venturi tubes each directly communicate with one of expansion chambers separately formed in the injector holder, each of the expansion chambers communicates with an outer annular chamber through an upright vertical channel thereof, an upper surface of the injector holder is flat, and a second injector is positioned higher than the upper surface of the injector holder and is open.

A gas burner device includes an orifice holder including an orifice. The gas burner device also includes a burner body. The burner body includes a venturi tube arranged to receive a gas from the orifice and a burner port discharging the gas supplied through the venturi tube. The venturi tube includes a venturi inlet through which the gas that is jetted from the orifice flows in. The venturi tube also includes a venturi outlet through which the gas flowing in through the venturi inlet is discharged. The venturi tube further includes an acceleration part including a smaller diameter than the venturi inlet and the venturi outlet and includes a cylindrical shape.

A multi-ring gas burner includes an outer burner ring that extends around an inner burner. The outer burner ring has a cross-lighting duct with a fuel delivery aperture positioned at a bottom portion of the cross-lighting duct. The fuel delivery aperture is configured for directing gaseous fuel from a fuel chamber of the outer burner ring into the cross-lighting duct.

A multi-ring gas burner includes a burner head positioned on a burner base such that the burner base and the burner head define a fuel chamber of an outer burner ring. A cap is positioned on the burner head. The cap has a ledge that extends over a plurality of flame ports of the outer burner ring.

A cooktop appliance includes a gas burner assembly positioned on a panel of the cooktop appliance at a top surface of the panel. The gas burner assembly includes a grate configured for supporting a cooking utensil. The grate defines an internal fuel passage. The internal fuel passage of the grate extends to a burner such that fuel is directed to the burner via the internal fuel passage of the grate.