LIQUID FERTILIZER APPLYING MACHINE Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: machine has frame mounted on wheels and adapted for carrying vessel with pump, injection needles connected to pump through hydraulic pipelines. Machine is further provided with device for driving needle on plate. Said device connected to chain disposed on wheel rim through drive sprocket on cardan shaft, which are connected with one another through ratchet mechanism. Needle drive is made in the form of crank of adjustable radius and rigid extension spring for returning needle upon completion of working cycle to initial position and pressing needle to adjusting stop, which is positioned on cleaning support and does not abut against it due to the presence of shock-absorbing (less rigid) extension spring. EFFECT: simplified construction of needle drive mechanism and wider operational capabilities of machine. 7 dwg