Patent ID: 6193166
Filing Date: 2001-02-27
Classification: A01M,B05B,Y02A

Abstract:
Agricultural spraying apparatus for the precision application of agricultural chemicals, comprising:(a) a plurality of differently sized agricultural spray nozzles, each nozzle being capable of producing spray of substantially consistent droplet size over a predetermined range of volume flow rates at a corresponding predetermined range of supply pressures, said flow rate range being defined between predetermined upper and lower limits which are a maximum of 30% above or below a rated flow rate for the nozzle;(b) a common feed of material to be sprayed, said feed being connected to said nozzles via valves which are remotely switchable;(c) a control system for controlling both switching of said nozzles and pressure of said common feed such that each of said nozzles receives fluid at pressures only within said predetermined range of supply pressures appropriate to that nozzle, said control system being preprogrammed with said ranges;(d) whereby the apparatus is capable of providing at least a fourfold change in volume flow rate of its total spray output at said consistent droplet sizes.