Travel-limiting device for mechanisms of the thrust exerted by a piston, in particular for the jacks of movement or advance intended to slip a conveyor or a soutenement walking on farms mining at the bottom

摘要

This device comprises a member for thrust placed between the cylinder 12 and the head 14 of the piston rod that - ci, this member thrust being constituted by a segment 22 judiciously of flat shape, which only partially surrounds the piston rod 13 and which can be engaged from the point on this rod. This segment of thrust is maintained at the required distance of the head 14 of the piston rod by means of spacing elements such as the rods 23, which may be engaged by stiffener in housings 24, 28 of the head 14 and of the segment thrust 22.