Abstract: A combustor extension for a heat gun where the heat gun has a jet pump for mixing pressurized fuel with air to form an air/fuel mixture and a combustor attachment for combusting the air/fuel mixture. The jet pump has a first electrical connector for providing an electrical charge to an ignition device at the combustor attachment for igniting the air/fuel mixture. The combustor extension includes a hollow conduit having proximal and distal ends for extending between and coupling the combustor attachment to the jet pump. A second electrical connector at the proximal end of the conduit electrically couples to the first electrical connector of the jet pump. A third electrical connector at the distal end of the conduit electrically couples to the ignition device of the combustor attachment. The second and third electrical connectors are electrically connected together.

Abstract: A jet pump for a heat gun includes an elongate hollow pump body lying along a longitudinal axis. The pump body has an inlet, a mixing section and an outlet. A nozzle unit is axially aligned with the inlet for directing pressurized fuel into the inlet of the pump body. Movement of the pressurized fuel into the inlet causes air to be drawn into the inlet to mix with the fuel within the pump body. A disk shaped air diverter is axially spaced away from the inlet of the pump body. The diverter has a length and a diameter. The diameter of the diverter is greater than the length of the diverter and larger than the inlet of the pump body. A housing is radially spaced from and surrounds the diverter forming a first annular gap therearound for air outside the housing to pass therethrough. The air moves around the diverter then changes direction between the diverter and the inlet of the pump body before entering the inlet.