Dual stacked gas burner and a venturi for improving burner operation

A gas burner assembly for a cooking appliance with a cooktop for surface cooking comprising:

• a first burner extending above the cooktop surface;
• a second burner extending above the cooktop surface and positioned in a stacked relationship with and located below said first burner, said second burner comprising a first set of ports configured to output a flame and a second set of ports located behind said first set of ports configured to distribute an air-gas mixture to said first set of ports;
• and
• a chamber located below said second burner, wherein said chamber is configured as a primary air reservoir for one of said first and said second burners, at least a portion of said chamber extending above the cooktop surface, said portion being configured to draw primary air from above the cooktop surface for isolating said second burner from the effects of pressure changes occurring below the cooktop surface.

A gas burner assembly for a cooking appliance with a cooktop for surface cooking comprising:

• a first burner extending above the cooktop surface;
• a second burner extending above the cooktop surface and positioned in a stacked relationship with and located below said first burner;
• and
• a chamber located below said second burner, said chamber configured as a primary air reservoir for one of said first and said second burners, at least a portion of said chamber extending above the cooktop surface, said portion being configured to draw primary air from above the cooktop surface for isolating said second burner from the effects of pressure changes occurring below the cooktop surface, said first burner comprising a first set of ports and a second set of ports, each port within the second set is vertically lower than each port within the first set, said second burner comprising a third set of ports, and an annular channel is formed between the second and third set of ports.