Hydraulic spreading wedge for the precipitation of trees with a stepped drive unit

摘要

Hydraulic spreading wedge for the precipitation of trees (1), with an expander head (2), between the one or more retaining plate (e) (5) which can be inserted wedge-shaped element (6) and a hydraulic advance unit, preferably a hydraulic cylinder (8), for the wedge-shaped element (6), and a hydraulic system for supplying the hydraulic cylinder (8) with a fluid under pressure, wherein the hydraulic system a drive unit (4) and a flexible hose line (3), via which the advance unit of the separately and which can be positioned by the expander head (2) independent drive unit (4) is supplied with pressure, has.