Heat gun with high performance jet pump and quick change attachments

A combustor extension for a heat gun, the heat gun having 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 having 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 comprising:

• a straight rigid hollow conduit having proximal and distal ends for extending between and coupling the combustor attachment to the jet pump, the conduit having a central axis;
• a second electrical connector at the proximal end of the conduit for electrically coupling to the first electrical connector of the jet pump;
• a third electrical connector at the distal end of the conduit for electrically coupling to the ignition device of the combustor attachment, the second electrical connector being electrically connected to the third electrical connector by an electrical conductor, the second electrical connector, the electrical conductor and the third electrical connector being positioned along the central axis of the conduit, the electrical conductor being maintained a sufficient distance away from conductive walls to prevent the formation of a capacitor therebetween, while allowing passage of the air/fuel mixture through the conduit;
• and
• a charge dissipater for dissipating residual electrical charges in the ignition device, the charge dissipater comprising a grounding member movable into electrical communication with the electrical conductor for dissipating the residual electrical charges.

A method of forming a combustor extension for extending a combustor attachment from a jet pump of a heat gun wherein the jet pump mixes pressurized fuel with air to form an air/fuel mixture and the combustor attachment combusts the air/fuel mixture, the jet pump having a first electrical connector for providing an electrical charge to an ignition device at the combustor attachment for igniting the air/fuel mixture, the method comprising the steps of:

• forming a straight rigid hollow conduit having proximal and distal ends for extending between and coupling the combustor attachment to the jet pump, the conduit having a central axis;
• positioning a second electrical connector at the proximal end of the conduit for electrically coupling to the first electrical connector of the jet pump;
• and
• positioning a third electrical connector at the distal end of the conduit for electrically coupling to the ignition device of the combustor attachment, the second and third electrical connectors being electrically connected together by an electrical conductor the second electrical connector, the electrical conductor and the third electrical connector being positioned along the central axis of the conduit, the electrical conductor being maintained a sufficient distance away from conductive walls to prevent the formation of a capacitor therebetween, while allowing passage of the air/fuel mixture through the conduit.