Abstract: An ultra low volume fog or aerosol generator produces a fog with droplets whose particle size or sizes are easily varied from about 5 microns to about 20 microns during the operation of the machine. This generator includes an air blower, the discharge of which is directed along a prescribed path, thence, through a passageway and, thence, through a nozzle into the ambient air. Liquid supplied to the nozzle is entrained by the air as it passes through the nozzle for producing finely droplets dispersed in the air. The particle sizes of the droplets are regulated by altering the volume of air discharged through the nozzle by means of an air regulator valve, which diverts a portion of the air from its prescribed path. An electrical motor controls the opening and closing of the air regulator valve.In one embodiment, the motor cyclically modulates the opening and closing of the valve. In another embodiment, the motor is a reversible, D.C.

Abstract: A smoke stack, which discharges contaminated gases, is provided with a plenum chamber, at its end, formed of one or more stacked modules. Each module includes a hollow cylindrical housing, from which protrudes, in various radial directions, a plurality of ducts, each being provided with a nozzle at its end. The nozzle has a central passageway through which a portion of the gases pass and is discharged into the atmosphere, and a second passageway which directs the air around the discharging gases for imparting a swirling action to the commingled gases. An ultra low volume of treatment fluid, usually a liquid chemical, is progressively discharged into the central passageway so that fog is generated as the gases and liquid emerge. Relief valves for the gas discharge into this fog. An accumulator tank at the top of a chamber or a metering pump supplies the liquid.

Abstract: A smoke stack, which discharges contaminated gases, is provided with a plenum chamber, at its end, formed of one or more stacked modules. Each module includes a hollow cylindrical housing, from which protrudes, in various radial directions, a plurality of ducts, each being provided with a nozzle at its end. The nozzle has a central passageway through which a portion of the gases pass and is discharged into the atmosphere, and a second passageway which directs the air around the discharging gases for imparting a swirling action to the commingled gases. An ultra low volume of treatment fluid, usually a liquid chemical, is progressively discharged into the central passageway so that fog is generated as the gases and liquid emerge. Relief valves for the gas discharge into this fog. An accumulator tank at the top of a chamber or a metering pump supplies the liquid.

Abstract: An aerosol fogging generator is disclosed having a prime mover and blower for delivering air through a duct system to a nozzle assembly. A fluid introduction system is provided to introduce fluids into the nozzle assembly for dispersal as a fog into the atmosphere. A passage provided between the fluid introduction system and the duct system provides for a cut off of the fog produced by the generator in a matter of seconds.

Abstract: A nozzle assembly in which the nozzle closes the end of angularly disposed air ducts, the nozzle having a central axial air passageway and a plurality of radially directed air passageways, the radially directed air passageways converging in arcuate paths toward the axis of the central passageway. Elements defining the central passageway are movable toward and away from each other to provide for a variable annular opening through which liquid, such as a pesticide, is introduced into the axial passageway and discharged with the air as a fog. In one embodiment of the invention, a motor controls the positioning of one element defining the central air passageway.

Abstract: A universal mounting structure for supporting a fog generator discharge head used in applying insecticides. The universal mounting structure includes a first conduit means constructed of a pair of right angularly disposed conduit portions for defining an entrance passageway and a transfer passageway, with one of the conduit portions including means for connecting the conduit means to fog generator air blower means. The universal mounting structure includes a second conduit means constructed of a pair of right angularly disposed conduit portions for defining a transfer passageway and an exit passageway. The second conduit means is connected to the first conduit means so that adjacent conduit portions are coaxially aligned with each other for angular adjustment about a vertically disposed axis and includes locking means for securing the second conduit means in a selected angularly adjusted position relative to the first conduit means.

Abstract: Apparatus for use in controlling a fog generator used in applying insecticide. The control apparatus includes a control panel which is adapted to be supported at a remote location relative to the fog generator and is provided with a vertically adjustable support post having a universally adjustable mounting base for securing the control panel at a desired adjusted position. A flow meter having an adjustable flow rate valve operatively associated therewith is mounted on the control panel and connected in line between insecticide supply means and discharge means. A thermometer is connected in line between the insecticide supply means and the discharge head for monitoring the temperature of the insecticide being discharged, for use in determining the regulation of the flow control valve means. An electromagnetic control valve is connected between the insecticide supply means and the discharge head and is operable between an on and off insecticide discharge position by switch means provided on the control panel.