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LINK-GEAR SPATIAL MECHANISM OF A POTATO DIGGER

Tines 2 rotate about axes C mounted in wheel 1 which rotates about fixed axis A. Rods 3 turn about axes B which are perpendicular to axes C. The ends of rods 3 pass through fixed ring 4. When wheel 1 rotates, a complex digging motion is transmitted to tines 2.
$1470$LG,FD$