Patent ID: 7363990

Claim:
Cutting device for sinking a cut hole in the ground in a sinking direction, comprising: a support having a support rotation axis, at least two cutting wheels mounted on the support in rotary manner about respective cutting wheel rotation axes, wherein: (a) the cutting wheels are arranged such that on rotation of the support, the cutting wheels describe a circular path along which they remove soil, and (b) the cutting wheel rotation axis of at least one cutting wheel has an offset with respect to the support rotation axis, at least one cutting wheel drive means for the rotary driving of the cutting wheels on the support about the respective cutting wheel axes for removing soil through the rotation of the cutting wheels about the respective cutting wheel rotation axes, and support drive means for simultaneously rotating the support together with the cutting wheels about the support rotation axis approximately parallel to the sinking direction in order to describe a circular path with the cutting wheels to remove soil, wherein the angle between the cutting wheel rotation axes and the support rotation axis is approximately 90°.