GRIPPING-AND-PULLING DEVICE FOR TREE FELLING Russian patent published in 1995 - IPC

FIELD: timber industry. SUBSTANCE: cylindrical knife of gripping-and-pulling device is made in form of two half-rings. Upper and lower grips are made in form of two levers in form of plate with pointed teeth on surface facing the tree. First lever of lower grip and first lever of upper grip are rigidly fixed on column, and second levers of corresponding grips, are hinge mounted. Knife drive is installed in posts. Center of cylindrical surface of half- ring installed on movable lever of lower grip is displaced relative to Center of cylindrical surface of half-ring installed on fixed lever of lower grip. EFFECT: enlarged operating capabilities. 3 dwg