Abstract: A hoisting mechanism comprises a pole (1) with weight and build-up branches (2, 3) and carrying elements (4) in these branches (2, 3) and a mechanism (6) for moving the carrying elements (4) in the branches (2, 3) from one such branch to the other. The mechanism (6) includes a hydraulic cylinder (8) with two pins (12, 13), two pairs of pivotable stops (17, 18), a guide (30), and two pushers. Axes (19) of oscillation of the stops (17, 18) are positioned in their centers of gravity, whereas the guide (30) has the form of an oval cup (31) secured to a housing (7) of the mechanism (6), has a slot (33) in a bottom (32) and holes (37) in the side wall to receive the pushers.

Abstract: The hoisting apparatus is comprised of a mast (1) consisting of four vertical rods (2, 2', 3,3') two of which have internal spaces accommodating strength members. The rods (3, 3') with strength members and other rods (2, 2') are arranged in pairs symmetrically to the vertical axis (5) of symmetry of the mast (1) and the cargo suspension (10) is, essentially, a rectangular frame enveloping the mast (1) and formed by two parallel beams (11, 11') each rigidly connected in its center with the corresponding bracket (9, 9'), and by two parallel rocker arms (12, 12') whose ends are articulated to the ends of the beams (11, 11').