초록 ▼

A liquid sprayer has a tank for storing liquid, a boom supporting spraying nozzles, and a pump and liquid control system for supply liquid under pressure to the spraying nozzles in a manner that maintains substantially uniform liquid dispensing density independent of the ground speed of the sprayer.

A liquid sprayer has a tank for storing liquid, a boom supporting spraying nozzles, and a pump and liquid control system for supply liquid under pressure to the spraying nozzles in a manner that maintains substantially uniform liquid dispensing density independent of the ground speed of the sprayer. A ground speed sensor, a liquid pressure sensor, and a liquid flow meter send signals to a controller to regulate a valve that controls the rate of flow of liquid to the spray nozzles.

대표청구항 ▼

An apparatus for dispensing liquid comprising: a tank for storing a liquid, means for supporting the tank for movement relative to the ground, ground speed sensor means operable to provide a first electric signal related to the ground speed of the apparatus, pump means connected to the tank operable

An apparatus for dispensing liquid comprising: a tank for storing a liquid, means for supporting the tank for movement relative to the ground, ground speed sensor means operable to provide a first electric signal related to the ground speed of the apparatus, pump means connected to the tank operable to draw liquid from the tank and discharge liquid, boom means having a plurality of nozzles for dispensing liquid onto a desired location, line means connected to the pump means and boom means for carrying liquid under pressure discharged from the pump means to said boom means, means for entering and storing at least one desired flow parameter, a liquid flow meter located in said line means for monitoring the actual flow rate of liquid in said line means, said flow meter including means for producing a second electrical signal related to said flow rate, first valve means located in said line means for controlling the flow rate of liquid in the line means, power means for regulating the first valve means to vary the flow rate of liquid in the line means relative to said actual flow rate and desired flow parameter, means to sense the pressure of the liquid in said line means downstream from said first valve means and provide a third electrical signal related to said second pressure, solenoid operated valve means in said line means adjacent said boom means operable either to allow liquid to flow into the boom means or to block the flow of liquid into the boom means, and control means responsivly coupled to said stored flow parameter and to said first, second and third electrical signals for controlling said power means to regulate the liquid flow rate to the boom means relative to said stored flow parameter and said first and second signals and for independently adjusting the flow rate relative to said second and third electrical signals whereby said liquid is distributed at a substantially uniform spray density independent of speed and pressure variations.