Abstract: A fuel burning apparatus which receives liquid fuel and converts it into a fine fume which is then mixed with air and conveyed to a burner where the mixture of the fuel and air is burned. The fuel is supplied from a supply tank and dripped onto a heating element having a spiral path formed around its outside. The drop of fuel are collected by means of a funnel placed near the end of the heating element to catch the drops and direct it onto the spiral path. As the drops of fuel proceed along the spiral path around the heating element, the fuel is converted into fine fumes. The heating elements are positioned in a mixing chamber which includes an air inlet to permit air under low pressure to pass into the mixing chamber and mix with the fumes of the fuel. The mixture then passes out of the mixing chamber into a storage chamber which provides the supply of fuel and air to a burner.

Abstract: A vaporizer and burner unit for an oil or kerosene space heater comprises three elongated, vertically stacked fuel mixture flow chambers A, B and C respectively defined between a lower U-shaped frame member 19b and the sloping bottom wall 26 of a flanged, upper U-shaped frame member 19a nested on the lower member, between the wall 26 and an inverted V-shaped pressure plate 27 having a plurality of fuel mixture feed holes 28 therein, and between the plate 27 and a burner plate 30 having a plurality of flame slits 31 therein. Fuel is fed into one end of the chamber A onto a heated vaporizer block 21, and combustion air blown in through a side window 24 adjacent the block and through a concentric gap 25 around the fuel supply line 12 mixes with the vaporized fuel and flows down chamber A and into chamber B through an end opening 29. The mixture then disperses through the holes 28 into chamber C and through the flame slits 31 to a spark igniter 62.

Abstract: An oil heater particularly adapted to burning waste oil, having oil flow control apparatus providing substantially constant flow of oil to the vaporizer pan without regard to the viscosity of the oil being burned. The flow control apparatus utilizes a piston pump having relatively large input and output orifices, and is driven by a thermostatically controlled constant speed, reversible direction electric motor. Means are provided to transmit the power from the motor to the piston pump such that rotation of the motor in one direction provides a long pump stroke and high volume rate, whereas rotation of the motor in the opposite direction provides a short piston stroke and low volume rate of pumping to provide minimal oil flow to the vaporizer pan to allow combustion to be maintained in the heater.