device for splitting or cracking of hard surfaces such as concrete surfaces.

摘要

the invention relates to a device comprising a solid component and means for raising and ladit release.the solid component comprises a slab (3) which can freely slide in a frame.and the lifting means to practice with friction (5) on one side of the applicator pad and means (6) on the other side of the slab.the latter may be moved between an active position and a passive position in which the lifting jack is released in the fall.