Sprayers
AssigneeImperial Chemical Industries PLC
InventorRonald A. Coffee
Life of this patent
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Abstract
A device to use as an agricultural sprayer, comprising a rotatable conductive sprayhead in the form of a disc or cup, means for supplying spray liquid from a reservoir to an inner surface of the sprayhead, an electric motor for rotating the sprayhead about its axis at a rate of 1000 to 8000 rpm, a circular induction electrode disposed adjacent the sprayhead rim, a high voltage generator for charging the electrode to a pontential in the range 1 to 3 Kilovolts, and means for earthing the sprayhead.
Claims6
An agricultural sprayer, comprising a rotatable conductive sprayhead in the form of a disc or cup, means for suppyling spray liquid from a reservoir to an inner surface of the sprayhead, an electric motor for rotating the sprayhead about its axis at a rate of 1000 to 8000 revolutions per minute, a circular induction electrode disposed adjacent the sprayhead rim, a high-voltage generator for charging the electrode to a potential in the range 1-3 kilovolts, and means for earthing the sprayhead.
A process for spraying aqueous liquid pesticidal formulations utilizing an earthed sprayhead in the form of a conductive disc or cup, and a circular electrode adjacent the edge of the disc or cup, comprising the steps of:
- rotating the conductor disc or cup at a speed in the range of 1,000-8,000 revolutions per minutes;
- supplying aqueous liquid pesticidal formulations to the rotating disc or cup so that it atomizes, with droplets thereof leaving the edge of the rotating disc or cup;
- and
- inducing an electrical charge on the formulation as it atomizes from the edge of the rotating disc or cup by charging the electrode to a potential in the range of 1-3 kilovolts.
Dependencies are inferred from the claim text.