Abstract: The invention relates to a pneumatic spring system (1) comprising at least the following components, specifically: a pneumatic spring cover (2) and a pneumatic spring piston (4), which are arranged opposing each other; a pneumatic spring bellows (3) made of elastomer material, which connects the pneumatic spring cover (2) and the pneumatic spring piston (4) with each other with the use of fasteners (8), whereby the bellows is capable of rolling off on the outer wall of the piston (5) with formation of an internal chamber (6) of the pneumatic spring having an elastic volume; as well as a connection (7) for ventilating and evacuating the internal chamber (6) of the pneumatic spring. The pneumatic spring system is equipped with a pressure-sensitive connection system which reacts to pressure in a way such that in the evacuated condition, the pneumatic spring cover (2) and the pneumatic spring piston (4) are connected with each other, whereby the connection is released again in the operating conditions, i.e.

Abstract: The invention relates to a tube arrangement, comprising at least the following components: a flexible double casing tube, with an inner tube (1) and an outer tube (2), forming a ring gap (3) which opens out into a widened cavity (43), in the vicinity of their ends; a connector (4), arranged at each end of the double casing tube, comprising a flange (42) and a fitting which, in the vicinity of the end of the outer tube (2) and of the cavity (43), has a first annular ring (6) and in the vicinity of the end of the inner tube (1), a second annular ring (5), a dividing chamber (10), between the flange (42) and the first annular ring (6) which is surrounded by a chamber enclosure (11), the chamber (10), furthermore, is connected to the cavity (43) and a drilling (12) exists in the chamber enclosure (11); a signal transmitter, which is arranged at each end of the tube, in the vicinity of the fitting, each one being connected to the drilling in the chamber enclosure by means of a connecter opening.

Abstract: A method for producing a thermoplastic elastomer material in the form of a mixture of one or more thermoplastics and one or more crosslinked rubbers. Said mixture contains the following constituents: one or more thermoplastics for 10-90%, one or several non-crosslinked rubbers, a crosslinking activator, a crosslinking agent, possibly other additives.

Abstract: A profiled seal for use in tunnel segments and comprising cut out grooves along the bottom of the seal; channels along the upper part of the seal; lateral faces and spreading feet for the seal; plus a bridge system having an outer bridge and an inner bridge.