COMBINED TILLAGE MACHINE Russian patent published in 2001 - IPC

FIELD: agricultural engineering. SUBSTANCE: combined subsoil tillage machine has pointed tine with working tools arranged in tiers behind tine. Four-link parallelogram mechanism is joined to tine. Hoes with pivot joints arranged in tiers are attached on rear tine of parallelogram mechanism. Extension is connected to upper link of four-link parallelogram and to depth regulator made in the form of screw mechanism, which is connected to lever of upper link of four-link parallelogram. Rear tine of parallelogram mechanism may have curvilinear profile. EFFECT: increased quality of soil crumbling and intensified separation of weeds, reduced consumption of herbicides and decreased process costs. 2 cl, 2 dwg