TELESCOPIC HYDRAULIC CYLINDER AND DAMPER FOR TELESCOPIC HYDRAULIC CYLINDER Russian patent published in 2015 - IPC F15B15/16 F15B15/22 

FIELD: machine building.

SUBSTANCE: telescopic hydraulic cylinder includes casing with hole for the work medium supply and removal, hollow rods with pistons installed in the casing one inside another, and creating straight stroke chamber and rod cavities, piston and dampers. At that the rods have at least two holes for the work medium supply and removal, located one above another on the longitudinal axis, on free ends of rods and in top end of the casing the lock rings are installed, and in the bottom part of each rod collars are made. Under the sealing elements of the lock rings the dampers are secured in form of the ring elements with collars, made in form of crown ring element, this ensures support of the drain holes in open state, and is necessary for operation of the system automatics for extension and stowage.

EFFECT: increased reliability of the telescopic hydraulic cylinder, simple design, impact exclusion at the end of stroke of each piston.

3 cl, 3 dwg