Patent ID: 7594812

Claim:
Double burner for gas cookers, of the type provided with multiple concentric flame crowns, which comprises: one head (T) with multiple concentric flame crowns, a first flame crown of external flames (FE) and a second flame crown of central flames (FC); one circular body ( 1 ) having a centre, a bottom and partitions ( 9 ) used to define two different, not-communicating channels, a first channel (E) used to supply gas to the external flames (FE) and a second central channel (C) to supply gas to the central flames (FC); two separate, not-communicating gas inlets, an upper inlet ( 3 ) and a lower inlet ( 4 ), both inlets being situated on the bottom of the body ( 1 ), the upper inlet being used to supply gas to the second channel and the lower inlet being used to supply gas to the first channel, the upper inlet ( 3 ) exactly ending in the centre of the body ( 1 ) and the lower inlet ( 4 ) extending beyond the centre of the body; burner having a vertical channel ( 3 a ) branching off from the upper inlet ( 3 ), said vertical channel ( 3 a ) being provided with a first gas nozzle ( 5 ) designed to introduce gas into the second central channel (C), a diverging pair of ascending channels ( 4 a ) branching off from the lower inlet, a respective nozzle ( 6 ) being disposed in each ascending channel designed to introduce gas into the first channel (E); a Venturi chamber ( 5 a ) with vertical axis is situated downstream the first nozzle ( 5 ), and a pair of Venturi chambers ( 6 a ) each with inclined axis is situated downstream each of the nozzles ( 6 ).