Abstract: An improved fuel burning combustion apparatus and method of combusting a fuel-air mixture wherein the apparatus includes a burner housing having a plurality of angularly adjoined flat wall panels to define a burner chamber of preselected geometric configuration having tangentially disposed combustion air inlets and air turbulence forming areas extending longitudinally along the angularly adjoined flat wall panels to provide a thorough mixing of air and fuel introduced into the burner chamber.

Abstract: An improved air heating apparatus and method of heating an air stream wherein the heating arrangement includes a heater housing with a combustion drum having a burner at one end thereof, the drum being disposed in spaced relation in the housing to extend longitudinally along the length thereof, a heat exchanger longitudinally extending in the space between the combustion drum and housing to receive combustion products from the combustion drum, an air stream blower positioned to pass an air stream over the heat exchanger in the space between housing and drum and to pass air from opposed ends of the combustion drum including the burner at one end to promote an extended burner flame substantially along the combustion drum length.

Abstract: An improved steady state fuel burner assembly and method of operation for a space heater wherein fuel and combustion air are initially ignited within a burner assembly with the resulting higher pressure in the burner assembly causing throttling of combustion air into the burner assembly until a preselected lower pressure is reached compatible with steady state combustion through exhaustion of initially combusted gases.

Abstract: A fuel supply system for a fuel spray combustor nozzle of a portable heater including a pump connected to the fuel spray combustor nozzle on the high pressure side thereof and alternatively connectable on the low pressure side to an on-board fuel chamber storage means or to an off-board storage supply through an actuable valve and solenoid system connected by fluid piping, valves and fittings extending between the on-board nozzle, pump, and storage chambers and toward off-board supply.

Abstract: An improved arrangement for a pulse jet engine assembly wherein pulsations of the engine are utilized to operate a motive source for a fuel pump which pumps fuel from a fuel supply source to the engine, the entire pulse jet engine assembly being internally self-sufficient after initial starting operation.

Abstract: A fuel burner assembly for providing a stable, non-pulsating flame wall proximate to a burner duct outlet thereof including structure which causes a combustion air stream to flow radially outwardly and then inwardly across a fuel supply outlet and spaced igniter centrally positioned adjacent the duct outlet, the stream then being divided into three flow paths, one path being axial, another being centrally rotated and a third being annularly compacted to stabilize the produced flame wall proximate the duct outlet.

Abstract: An indirect fired air heater of the portable type and method of operating the same wherein the combustion gas flow is reversed in a combustion drum and passed through a heat exchanger between the drum and the outer casing, the heat exchanger being supported from the outer casing with the combustion drum floatingly supported therebetween.

Abstract: Portable air heating apparatus for supplying heated air to a plenum chamber including a partitioned housing with at least two chambers, one of which is sound-conditioned to contain a power member, the housing having therein a blower and radiator connected to the sound-conditioned power member, a heat exchanger communicating with the blower, heated air passing from the heat exchanger in the housing to the plenum chamber and recirculated therefrom back to the housing over the radiator before returning to the blower.

Abstract: A forced air heater for heating a venting air stream including an outer casing, a fan for forcing the venting air stream through the casing, a combustion drum providing a combustion chamber for a burner supported within the casing, a flue gas header spaced downstream from the drum connected in separate fluid communication with the combustion chamber to accommodate evacuation of combustion gases from the chamber through the header, a passage for the venting air stream extending through the casing in heat transfer relation with the drum and header, and a plurality of vanes secured within the casing adapted to circulate a predetermined portion of the venting air stream between said drum and header.

Abstract: A flexible linearly expansible expansion joint including a flexible sleeve utilized in the connection of one tubular member to a second tubular member. The flexible sleeve encircles the one tubular member and is attached at one end thereto, the opposed end including an elongated cylindrical portion having a diameter less than the diameter of the second tubular member wherein the elongated cylindrical portion extends into the second tubular member and an O-ring is disposed around the outer surface of the cylindrical portion and fits within an annular area defined by the outer surface of the flexible sleeve and the inner surface of the second tubular member to provide a fluid tight seal between the first and second tubular members.

Abstract: A trailer frame is provided with a positioning member for releasably receiving a towbar and parking stand thereto. The towbar is provided with a releasable locking device thereon for positioning the towbar in a plurality of positions. Generally, the towbar is adaptable for positioning in a towing position, an operating position, and a storage position.