MOVABLE TELESCOPIC HOISTING CRANE Russian patent published in 2015 - IPC B66C23/36 

FIELD: transport.

SUBSTANCE: invention relates to movable hoisting cranes. The movable telescopic hoisting crane (1) has telescopic crane boom (9) containing at least three shafts (16, 17, 18). Each of the shafts (16, 17, 18) contains at least two sections (19, 20, 21, 22, 23, 24, 25, 26, 27), providing telescopic structure in longitudinal direction (L). Across the longitudinal direction (L), the mentioned shaft sections (19, 20, 21, 22, 23, 24, 25, 26, 27) are located at distance from each other thus forming boom sections (11, 12, 13) with at least one bending-rigid connecting member (28, 29, 30, 31). Corresponding longitudinally adjacent sections (11, 12, 13) are made capable to be mechanically interlocked in longitudinal direction (L).

EFFECT: increased operating load due to increased inertia moment of crane boom area (9).

22 cl, 12 dwg