Patent ID: 8511294

Claim:
A gas burner for a cooking appliance comprising: a cup shaped support having a closed base and a first inlet for a gas feeding first injector, said gas feeding first injector being positioned on said base; a first chamber having a first intake for a first mixture of gas coming from said first injector with primary air coming from a first air inlet, said first mixture feeding a ring of main flames; a second chamber placed above said first chamber, said second chamber opening upwardly, being fluidly separated from said first chamber and having a second intake for a second mixture of gas, coming with a constant flow rate from a second injector, with primary air, coming from a second air inlet disposed above a cooking hob where the gas burner is disposed, said second mixture feeding a substantially continuous and annular simmering flame, said first and said second inlets being separate, said second air inlet and said second chamber being fluidly connected by a path formed below and through said first chamber; a circumferential wall having a plurality of radial apertures allowing an outflow of said first mixture to feed said ring of main flames; a discoidal septal wall separating said first and said second chambers; a cover for upper closure of said second chamber; and a substantially continuous annular passage defined between a lower surface of said cover and an upper surface of said septal wall, said annular passage allowing an outflow of said second mixture from said second chamber to feed said annular simmering flame, wherein said cover has a circumferential edge extending outwardly beyond said annular passage to shield said annular passage and said annular simmering flame from ambient conditions.