DEVICE FOR GRIPPING AND LIFTING OF SILT-COVERED UNDERWATER OBJECTS Russian patent published in 2019 - IPC B63C7/20 B63C7/06 

FIELD: machine building.

SUBSTANCE: invention relates to lifting and is intended for gripping and lifting of silt-covered underwater objects of arbitrary shape. Proposed device comprises a horizontal section, ballast tanks with inlet valves, a power hydraulic cylinder and vertical sections in the form of vertical tubular rods, through which cargo cables are laid. Lower ends of cargo ropes are fixed to movable support cantilevers, and upper ends are fixed to piston of power hydraulic cylinder installed on upper part of horizontal section. On horizontal section under air boxes there installed is hermetically closing power hydraulic cylinder ballast capacity, and the vertical tubular rods are tightened with a cylindrical shell attached to the horizontal section with formation of a container open from below, which is interconnected with the ballast capacity by means of holes in the horizontal section. Hydraulic cylinder piston is hollow and provided on its outer side is notches with chamfered teeth as ratchet rack, and piston inner side is communicated with gas generator housing installed from above. Common space of gas generator and hollow piston is filled with combustible without air access by solid gas-forming compound with electric igniter. In the middle part of the hydraulic cylinder body there are side holes, and spring-loaded stoppers interacting with the chamfered teeth of the piston are installed on its outer side.

EFFECT: technical result is higher efficiency of device for lifting silt-covered objects.

1 cl, 4 dwg