Heat gun with high performance jet pump and quick change attachments
First Claim
1. 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; and
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.
12 Assignments
0 Petitions
Accused Products
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.
96 Citations
18 Claims
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1. 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:
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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; and
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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. 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:
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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. - View Dependent Claims (9, 10, 11, 12)
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13. 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:
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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. - View Dependent Claims (14, 15, 16, 17, 18)
providing the conduit with a proximal hole at the proximal end of the conduit for engaging the first spring loaded button of the jet pump for locking the extension to the jet pump; and
providing the conduit with a second spring loaded button at the distal end of the conduit with the first hole of the combustor attachment for locking the combustor attachment to the extension.
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15. The method of claim 13 further comprising the step of providing a charge dissipater for dissipating residual electrical charges in the ignition device.
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16. The method of claim 15 in which providing the charge dissipater comprises providing a grounding member movable into electrical communication with the electrical conductor for dissipating the residual electrical charges.
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17. The method of claim 13 further comprising the step of providing sealing arrangements at the proximal and distal ends of the conduit for sealing the conduit to the jet pump and the combustor attachment.
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18. The method of claim 17 further comprising the step of providing each sealing arrangement with a mounting flange and at least one “
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ring positioned thereon for providing hydraulic sealing.
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Specification