Abstract: The invention relates to a rod section of a ground drilling rod, wherein the rod section is configured at the end to form a plug connection and has (a) a male connector or (b) a female connector at at least one end, wherein the male connector has at least one circular portion and at least one more straight-line-like portion in cross section on the outside, or the female connector has at least one circular portion and at least one more straight-line-like portion in cross section on the inside.

Abstract: The invention relates to a rod section of a ground drilling rod, wherein the rod section is configured at the end to form a plug connection and has (a) a male connector or (b) a female connector at at least one end, wherein the male connector has at least one circular portion and at least one more straight-line-like portion in cross section on the outside, or the female connector has at least one circular portion and at least one more straight-line-like portion in cross section on the inside.

Abstract: A ground drilling device for cable-guided drilling comprising a drive for connecting and/or moving rod sections of a drill string along a drill string axis, wherein a cable reserve for receiving a cable with a length of at least two rod sections is provided and a contact device for electrical contacting of one end of the cable of the cable reserve is provided.

Abstract: A ground drilling device for cable-guided drilling comprising a drive for connecting and/or moving rod sections of a drill string along a drill string axis, wherein a cable reserve for receiving a cable with a length of at least two rod sections is provided and a contact device for electrical contacting of one end of the cable of the cable reserve is provided.

Abstract: A double drill rod section has an outer drill rod section and an inner drill rod section. The inner drill rod section has at least one conductor. In order to bring about an electrical connection of the conductor, the inner drill rod section has an essentially annular outer contact, and, in the annular space between the outer drill rod section and the inner drill rod section, a pick-up is in contact with the annular outer contact of the inner drill rod section.

Abstract: A double drill rod section has an outer drill rod section and an inner drill rod section. The inner drill rod section has at least one conductor. In order to bring about an electrical connection of the conductor, the inner drill rod section has an essentially annular outer contact, and, in the annular space between the outer drill rod section and the inner drill rod section, a pick-up is in contact with the annular outer contact of the inner drill rod section.

Abstract: A transmitter housing for a drilling device having a drilling fluid feed line comprises a collector space formed in the interior of the transmitter housing for accommodating a pressure sensor of a locating probe.

Abstract: A transmitter housing for a drilling device having a drilling fluid feed line comprises a collector space formed in the interior of the transmitter housing for accommodating a pressure sensor of a locating probe.

Abstract: The invention relates to a method for transmitting data from a device, such as is used in endoscopy or microsurgery, for example, to a receiving unit, wherein a magnetic dipole disposed in or on the device is rotationally driven, the data are generated by a change in the rotational frequency of the magnetic dipole, and the changing magnetic field of the magnetic dipole is received and analyzed by the receiving unit, wherein the rotational speed range in which the magnetic dipole can be driven is divided into partial ranges, each associated with a type of data.

Abstract: A drill head, particularly for a horizontal drilling device, includes a housing and a radar unit disposed within the housing. The radar unit generates electromagnetic waves that exit the housing. The housing of the drill head is made of a dielectric material at least in the region where the electromagnetic waves exit the housing.