HOSTING DEVICE Russian patent published in 2008 - IPC B66B9/02 

FIELD: hoisting and transportation equipment.

SUBSTANCE: hoisting equipment comprises screw connected with load boards, screw rotation drives and cylindrical nut. Nut cylinder is closed with lids from two opposite sides thereof. Screw drives are connected to outer surface of nut cylinder. Hoisting device also has slotted shafts and toothed wheels with slotted orifices adapted to receive said slotted shafts. Each slotted shaft is connected with corresponding drive through gear and is supported by lids by means of bearings. Screw has toothed crown brought into constant engagement with said toothed wheels.

EFFECT: increased reliability of hoisting means.

2 dwg