A device and a method for generating percussive pulses or vibrations for a construction machine, in which a piston is reversibly reciprocated in a working space in a housing between a first reversal point and a second reversal point, wherein, for the purpose of generating the percussive pulses or vibrations, the piston is set into a reversible movement by means of a pressure fluid and the said pressure fluid is led into and out of the working space in the region of the first reversal point and the second reversal point. The position of the piston is detected by way of a measuring means, in that depending on the detected position of the piston a control unit controls at least one controllable valve, through which pressure fluid is led into and/or out of the working space, wherein by the control unit the movement of the piston is controlled.

A ram boring device has a pressurized-fluid driven striking piston in a device housing and a rotating reversing device configured to urge the striking piston from a forward operation to a reverse operation, in order to create oblique or horizontal bores in the ground. A piston chamber of a rotary piston drive is connected to a control fluid line.

A ram boring device has a pressurized-fluid driven striking piston in a device housing and a rotating reversing device configured to urge the striking piston from a forward operation to a reverse operation, in order to create oblique or horizontal bores in the ground. A piston chamber of a rotary piston drive is connected to a control fluid line.

A guide device and associated methods for forming a hole in the ground using compression or other means. In one example, the guide device includes a compression hammer having a hammer tip; a guide frame member for guiding the compression hammer into one or more positions along the guide frame member; and a movement control assembly securing the compression hammer to the guide frame, the movement control assembly selectively moving said compression hammer along said guide frame, so that said compression hammer forms the hole in the ground. By compressing soil materials, which has the effect of increasing soil density around the hole, a more rigid and accurate hole (i.e., within higher dimensional tolerances) is created when compared with holes created by drilling/boring/excavation.

A guide device and associated methods for forming a hole in the ground using compression or other means. In one example, the guide device includes a compression hammer having a hammer tip; a guide frame member for guiding the compression hammer into one or more positions along the guide frame member; and a movement control assembly securing the compression hammer to the guide frame, the movement control assembly selectively moving said compression hammer along said guide frame, so that said compression hammer forms the hole in the ground. By compressing soil materials, which has the effect of increasing soil density around the hole, a more rigid and accurate hole (i.e., within higher dimensional tolerances) is created when compared with holes created by drilling/boring/excavation.