FIELD: cargo hoisting facilities. SUBSTANCE: drive has movable links 4 which are articulated to lower grip 5 and upper grip 6; these links move over support 9. Drive has crankshaft 1 with two cranks whose necks are hinged to connecting rods 2 articulated in their turn with slide blocks 3. Each slide block is articulated with respective movable link 4. EFFECT: enhanced reliability. 1 dwg
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