Patent ID: 7568911
Filing Date: 2009-08-04
Classification: F21L,F23D,F24C,Y02E

Abstract:
1. A camping stove with preheat system featuring a path which feeds a fuel past a pilot flame and a heating flame for preheat purposes comprising, in combination: a stove having a fuel tank, the fuel tank having an essentially flat top with an essentially flat bottom parallel with the top and an essentially cylindrical side wall there between to define an interior fuel chamber for the receipt of fuel to be burned by the stove during operation and use, the top having a plurality of circumferentially spaced holes on the an outer perimeter area of the flat top and in proximity to the side wall including a fuel hole and a pilot hole and a gauge hole, the side wall having a pump hole; a fuel feed path including a vertical pipe assembly functioning as a riser beginning in the fuel chamber to an elevation above the top of the fuel tank, the fuel feed path also including a horizontal pipe assembly functioning as a vaporizer beginning at a top of the vertical pipe assembly and extending across a middle of the top of the fuel tank, the fuel feed path also including a generally C-shaped pipe assembly beginning at an end of the horizontal pipe assembly and terminating in proximity to a center of the fuel tank between the horizontal pipe assembly and the top wall of the fuel tank, the horizontal pipe assembly also having an associated warming coil in a generally circular configuration the warming coil being operationally parallel oriented to the horizontal pipe assembly so as to direct a flow of some of the fuel from one part of the horizontal pipe assembly over a burner to another part of the horizontal pipe assembly; a generally cylindrical ignition chamber at a terminal end of the C-shaped pipe assembly with a spacer beneath the ignition chamber and a bolt positioning the ignition chamber and spacer above the center of the fuel tank, a lower plate located above the spacer and beneath the ignition chamber and an upper plate located in proximity to the ignition chamber, the ignition chamber having apertures located above the upper plate, said apertures being arranged to produce flames for cooking purposes and wherein said flames are positioned with respect to the horizontal pipe assembly and the warming coil so as to preheat the fuel flowing to the burner chamber from the fuel tank and through the horizontal pipe assembly and the warming coil, and wherein the warming coil and the ignition chamber and the lower plate and the upper plate being essentially coaxial; a valve assembly having an elongated rod with a handle at one end exterior of the horizontal pipe assembly and a needle at an other end and screw threads intermediate thereof, the needle adapted to move between an advanced orientation to preclude the flow of fuel to the ignition chamber by contact of the rod with a valve seat, and a retracted orientation to allow the flow of fuel to the ignition chamber through the valve seat, the handle adapted to be rotated by a user whereby the threads will control the orientation of the needle and the extent of the fuel fed and the heat output of the stove; a pilot assembly passing through the pilot hole of the flat top of the fuel tank, the pilot assembly including a pilot tube having a lower end extending from within the fuel chamber forming a fuel inlet into the passageway of the pilot tube, and the pilot tube having an upper end at a location above the top of the fuel tank forming an end flame port with a fuel passageway through the pilot tube, the pilot assembly also including an inverted L-shaped tube extending proximally from the upper end of the pilot tube the L-shaped tube thereby communicating with an air inlet aperture and a fuel nozzle which is regulated by a pivotal controller, the L-shaped tube then terminating distally in proximity to the horizontal tube assembly and the warming coil, the L-shaped tube distally there defining a flame port, the pilot assembly also including the pivotable controller having an associated controller spring, the controller being configured to be pivoted between a first position in response to a spring force created by the spring to close off a flow of fuel by occlusion of the pilot tube by the controller and a second position in response to a downward force by a user's thumb to activate the pilot and preheat the fuel, wherein a combustible air and fuel mixture is formed within the pilot tube with the mixture being delivered to the distal end of the L-shaped tube for combustion; a pressure gauge secured to the fuel tank and communicating with the fuel tank at the fuel hole to determine the pressure within the fuel tank; a pressure pump secured to the fuel tank at the pump hole to increase the pressure within the fuel tank; and a support assembly having a lower ring positionable around the bottom of the fuel tank and an upper ring with a grid platform positionable above the stove with spacer struts there between whereby the system is adapted to support food to be heated at a location above flames generated by the stove.