SPRAY BAR FOR SURFACE APPLICATION OF LIQUID CHEMICALS Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: invention is designed for top dressing of crop with mineral fertilizers and treatment of crop with pesticides and growth regulators. Proposed spray bar contains frame with fixed bed and movable carriage. Inner corrugated parts of two cantilevers in form of pneumatically stressed soft unfold able envelopes are secured on carriage. Each cantilever contains cable with sheaves and drum with drive. Spray nozzles are secured on envelopes of cantilevers. With cable being wound on drum, length of cantilevers changes which provides adjustment of sprayer cover width on treated plot. EFFECT: enlarged operating capabilities. 7 dwg