Patent ID: 9402339
Filing Date: 2016-08-02
CPC Classification: A01B,F16F

Claim Text:
1. A soil working device for creating cavities in soil, comprising: a machine frame that can move in the direction of travel, at least one drive that is mounted in the machine frame and moves at least one pivotally mounted piercing tool up and down in a substantially vertical direction, wherein, before piercing into the soil, the piercing tool is in a home position at a predefined piercing angle, and, in the soil, performs a pivoting movement about a first pivot axis as a result of the machine frame moving in the direction of travel, said pivoting movement being superimposed on the up-and-down movement, a restoring means which is coupled to the piercing tool and comprises a piston/cylinder unit with a spring element that acts on the piston/cylinder unit and brings the piercing tool back into the home position once the latter has emerged from the soil, and a damping means which dampens the shock of the piercing tool against the machine frame when the piercing tool hits a stop defining the home position, wherein at least one laterally projecting flange is arranged at the outer free end of the piston rod, said flange forming the damping means together with at least one corresponding flange located at the axially opposite, piston-side end of the cylinder unit and at least one damping element that is located between the two opposite flanges and is secured to one or the other flange.