Abstract: The invention relates to a connection device for a supply line with a jacket pipe and at least two inner lines arranged therein, wherein a housing with a first connection region for the jacket pipe and a second connection region for the inner lines is provided. According to the invention the first connection region comprises at least one holding element which is mounted, for the purpose of holding or releasing the jacket pipe, so that it can be radially fed thereto or returned therefrom. The second connection region is arranged axially spaced apart from the first connection region and comprises axially actuated plug connection elements for the inner lines.

Abstract: The invention relates to a connection device for a supply line with a jacket pipe and at least two inner lines arranged therein, wherein a housing with a first connection region for the jacket pipe and a second connection region for the inner lines is provided. According to the invention the first connection region comprises at least one holding element which is mounted, for the purpose of holding or releasing the jacket pipe, so that it can be radially fed thereto or returned therefrom. The second connection region is arranged axially spaced apart from the first connection region and comprises axially actuated plug connection elements for the inner lines.

Abstract: The invention relates to a pile boring tool for producing a pile bore in the ground, with a central tube coaxial to the boring axis, at least one edge directed transversely to the boring axis and on which is provided a plurality of cutting teeth and a conveying mechanism for receiving and/or conveying away the soil removed by the cutting teeth. For the better guidance of the pile boring tool, the latter has at least two cutting edges upstream of the cutting teeth in the boring direction, said cutting edges being mutually displaced and spaced from one another so as to form a central free space.