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US 4,357,670 AGranted
Devices for testing spraying nozzles
AssigneeE. Allman & Company Limited
InventorPhillip J. McFarlane
Life of this patent
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AssigneeE. Allman & Company Limited
InventorPhillip J. McFarlane
Estimating the term…
A device for testing the performance of agricultural, horticultural or the like spraying equipment. The device includes a flowmeter, a fitting for coupling the flowmeter to a nozzle in the equipment, electrical circuit to which an electrical signal from the flowmeter is applied, and a visual display connected to the electrical circuit. In one embodiment, the electrical circuit scales the signal from the flowmeter and the display shows the rate of supply of liquid from the nozzle. In a second embodiment control means are provided for applying to the electrical circuit a signal representing a desired speed of forward travel and width of ground to be sprayed, and the display shows the volume of liquid then applied to unit area of the ground. In a third embodiment the electrical circuit includes a microcomputer and control means include a keyboard. By operating appropriate keys an operator can obtain a variety of displays, including the rate of supply of liquid from the nozzle, the speed to give a desired application rate and the application rate for a desired speed, and the average, maximum, minimum and percentage error of the rate of supply, speed and application rate.
A device for individually testing the output performance of spraying nozzles of agricultural, horticultural or the like equipment while said nozzles are substantially stationary, comprising a flowmeter for generating an electrical signal representing the rate at which liquid is supplied thereto, means for receiving liquid which has emerged from one of said spraying nozzles and directing the liquid to the flowmeter, display means, electrical circuit means which, when the electrical signal from the flowmeter is applied thereto, produces an output signal which represents a measure of the performance of the nozzle which varies with the rate of supply of liquid from the nozzle, and means for applying the output signal to the display means, whereby the display means provides a display of the said measure of performance of the nozzle in the testing of said equipment for desired spraying performance.
Dependencies are inferred from the claim text.