Abstract: A switch-over apparatus for a thick-matter pump includes a housing that forms a pre-fill vessel, which has first and second inlet/outlet openings and an outlet opening positioned on opposite sides of the housing. The apparatus further includes a pivot body positioned within the housing and that forms a duct. The duct includes a duct inlet configured to pivot between the first and second inlet/outlet openings and includes a duct outlet configured to align with outlet opening. The pivot body forms at least one seal chamber adjacent the duct inlet or duct outlet. The apparatus further includes an elastic seal positioned within the seal chamber and includes a support strip positioned within the seal chamber between the elastic seal and the pivot body. The seal strip forms first and second oblique-cut ends.

Abstract: A support apparatus for coupling to a vehicle, the apparatus including a support structure and a hydraulic cylinder coupled to the support structure. The hydraulic cylinder is configured to move linearly with respect to the support structure and to expand and contract. The apparatus further includes a sensing assembly that includes a proximity sensor. The proximity sensor is configured to sense and indicate that the hydraulic cylinder breaches a predetermined threshold distance between the hydraulic cylinder and the support structure.

Abstract: A device for generating a desired transit time delay of a pulsed radar signal is characterized in that a delay line (13) with signal input and signal output for the pulsed radar signal is provided whose transit causes time delay &tgr; of the pulsed radar signal, that a signal amplifier (14) is connected downstream of the delay line which increases the amplitude of the pulsed radar signal by a certain amplification factor f, and that a decoupling device (12) is provided which permits supply of at least part of the amplitude of the pulsed radar signal coming from the signal output of the signal amplifier to the signal input of the delay line again and which permits, after n times transit of the pulsed radar signal through the delay line, decoupling of at least part of the amplitude of the pulsed radar signal, wherein T=n·&tgr; and wherein n is a natural number.

Abstract: A device for generating a desired transit time delay of a pulsed radar signal is characterized in that a delay line (13) with signal input and signal output for the pulsed radar signal is provided whose transit causes time delay &tgr; of the pulsed radar signal, that a signal amplifier (14) is connected downstream of the delay line which increases the amplitude of the pulsed radar signal by a certain amplification factor f, and that a decoupling device (12) is provided which permits supply of at least part of the amplitude of the pulsed radar signal coming from the signal output of the signal amplifier to the signal input of the delay line again and which permits, after n times transit of the pulsed radar signal through the delay line, decoupling of at least part of the amplitude of the pulsed radar signal, wherein T=n·&tgr; and wherein n is a natural number.

Abstract: An engaging sandbag envelope for receiving sand or another loose bulk or free-flowing medium, wherein the specific weight of the medium is higher than that of water and it does not harden during and after filling, characterised in that hook-and-loop female connecting elements are arranged on the top surface side of the sandbag envelope and hook-and-loop male sticking elements are arranged on the underneath surface side so that when the sandbag envelopes filled with a medium are stacked one upon the other and in relationship with each other the hook-and-loop male sticking elements of the one envelope engage into the hook-and-loop female connecting elements of at least one further envelope, and in that case the hook-and-loop male sticking elements and the hook-and-loop female connecting elements on the top surface side or the underneath surface side of the envelopes are arranged over the entire surface area or in portion-wise manner.

Abstract: If the sandbags are used for protective walls in the case of fire or for protection against chemical substances, it is also necessary that the bags as well as the fastening and sealing devices withstand the heat of fire and chemical substances such as acids without disengagement from each other.

Abstract: The invention relates to a two-cylinder thick matter pump having a piston storage which is filled during the thick matter feed with the feed cylinders and evacuated by the hydrocontrolled storage piston into the feed pipe between the strokes of the feed pistons to reduce the pressure drop and the undelivered amount in the feed pipe. The inventive proposal is that the hydrocontrol of the storage piston (10) is served by a working piston (8) to be acted upon hydraulically on both sides, that is controlled with the feed cylinders and whose limits of travel, with the limits of travel of the storage piston (10), are fixed on the storage driving cylinder (7) when the storage cylinder (4) is fully evacuated and is filled.

Abstract: A cutting tool, especially a scissors with drawing cut includes a lower shear blade pivotally connected to an upper shear blade by a bolt or other suitable means which projects into an oblong hole of the upper shear blade. The lower shear blade is provided with a straight groove which extends slantingly to the longitudinal axis of the lower shear blade and is engaged by a pin which is part of a plate-shaped injection molded part snugly inserted in the upper shear blade and including the oblong hole.