Abstract: The invention relates to a drainage trench unit (10) which comprises at least one drainage trench sub-unit (12), the at least one drainage trench sub-unit (12) having a base wall (16) and a plurality of hollow pillars (18), said pillars (18) being connected integrally to the base wall (16) and tapering, preferably conically, away from the base wall (16), i.e. tapering from their base end (18a) to their top end (18b). The invention also relates to a transport unit for transporting a plurality of such drainage trench units (10).

Abstract: The invention relates to a drainage trench unit (10) which comprises at least one drainage trench sub-unit (12), the at least one drainage trench sub-unit (12) having a base wall (16) and a plurality of hollow pillars (18), said pillars (18) being connected integrally to the base wall (16) and tapering, preferably conically, away from the base wall (16), i.e. tapering from their base end (18a) to their top end (18b). The invention also relates to a transport unit for transporting a plurality of such drainage trench units (10).

Abstract: A coupling device with a housing (12) and a locking element (11, 11?) for receiving a cylindrical connecting element (18, 18a), whereby an operating element (30) for the releasing of the locking element is accessible by way of an opening in the housing (12, 12?) and whereby the locking element (11, 11?) includes at least one holding portion (26), whereby the locking element (11, 11?) includes a first spring arm (20) with a holding portion (26) which arm extends from the operating element (30) all the way to a wall of the housing (12, 12?) opposite the operating element, whereby the spring arm (20) is constructed at the opposite wall with a joint portion (24). Alternatively, there are two spring arms with joint ends that engage each other.

Abstract: The invention relates to a coupling device with a housing and a locking element for receiving a cylindrical connecting element, whereby an operating element for the releasing of the locking element is accessible by way of an opening in the housing and whereby the locking element includes at least one holding portion, whereby the locking element includes a first spring arm with a holding portion which arm extends from the operating element all the way to a wall of the housing opposite the operating element, whereby the spring arm is constructed at the opposite wall with a joint portion.

Abstract: The invention relates to a plastic corrugation corrugated pipe with corrugation peaks and corrugation valleys for household apparatus or motor vehicles, which pipe has at least one connecting portion and, in accordance with the invention, a container monolithically or integrally molded with the corrugated pipe and having a shape different from the shape of the plastic corrugation corrugated pipe.

Abstract: Disclosed is a nozzle arrangement for the coextrusion of a product with at least two layers, whereby a distributor portion 14 adjacent to the extruder is provided through which an extruding mass is delivered to the extruder and whereby a nozzle portion 12 for the extrusion of the extrusion mass is connected to the distributor portion, whereby in accordance with the invention a mounting and connecting base is provided between the distributor portion and the nozzle portion.

Abstract: The invention relates to a motor vehicle jet water conduit connecting arrangement for connecting a plastic corrugated pipe within a motor vehicle jet water conduit system, wherein said connecting arrangement is formed with a corrugated pipe section and a connector support section, and a socket section is provided in accordance with the invention which comes to rest in a fitting position between a connector support area on the corrugated pipe side and the connector support section.

Abstract: The invention relates to a corrugated plastic pipe arrangement with a first preferably cylindrical pipe body, a second preferably cylindrical pipe body, and a connecting portion including first and second connecting parts respectively associated with one of the pipe bodies, whereby one connecting part includes an engagement extent and the other connecting part a holding region for holding the engagement extent in a holding position in which the pipe bodies are connected to one another.

Abstract: The invention provides a molding apparatus and particularly a corrugator for manufacturing pipes, particularly corrugated pipes, having at least two series of circulation mold jaw parts, which form a molding channel in a predetermined area, and wherein the series are guided in respective circulation guides. The invention further provides that at least one exchangeable mold jaw parts or mold blocks is provided with another pipe molding wherein at least one exchange member is provided along at least one of the circulation guides of at least one of the mold jaw part series.

Abstract: The invention relates to a corrugated pipe which, in accordance with the invention includes an engagement structure formed perpendicular to the longitudinal extent of the corrugated pipe, whereby the engagement structure includes a portion dimensioned in circumferential direction of the corrugated pipe which is further radially spaced from the inner diameter of the pipe.

Abstract: The invention relates to a pipe arrangement with a corrugated pipe (10a, 10b) which has a slit (14) in axial direction, whereby, in accordance with the invention, at least one pipe section (22a, 22b) is provided with corrugations, which can be brought into engagement with the corrugated pipe over an axially extending portion, whereby the pipe section includes a longitudinal slit (24) and, thus, can be positioned onto or inserted into the corrugated pipe so that the slit (14) in the latter is covered. This provides a simple pipe arrangement which can be easily and economically produced and does not exert undue stress on the cables or conduits therein or branching off therefrom.

Abstract: A tube or pipe connector of plastic for corrugated pipes or tubes is adapted to be folded open in the axial direction, comprises two half members connected via a film hinge and provided with a detent member for mutual locking of the half members, and at least one portion which is adapted to receive corrugated pipe and the interior of which is formed to match the outer periphery of the corrugated pipe. The pipe connector is provided with a tube piece which has a thread and a stop member is provided which has an outer diameter greater than the outer diameter of the tube piece. Furthermore, a tube connector of plastic is proposed for corrugated pipes of different outer diameter, and a divisible nut of plastic for such tube connectors serves for securing the threaded tube pieces.

Abstract: A corrugator for ribbing pipes includes two synchronously circulating chains of mold halves, a guide device for the mold halves having an input zone in which the associated mold halves are brought into engagement with each other, a molding zone in which a central channel is provided for guiding the engaged mold jaws and an output zone in which the mold halves are again separated from each other, as well as return guides for the mold halves on the path between the output and input zones and cooling apparatus for cooling at least the central channel with a coolant. A plurality of hollow profile modules is provided for forming the molding zone, each module being provided with a central cavity for the cooling apparatus and two lateral guide portions. Modules are arranged in pairs joining each other transversely of the production direction of the corrugator, and a plurality of module pairs are arranged adjoining each other in series in the production direction of the corrugator.

Abstract: Apparatus for extruding and reshaping plastic tubes including cooperating circulating molds attached to continuous belts or chains. The molds circuits at generally constant level. A wheeled carriage is provided to support the molds and to permit axial adjustment of the molds relative the extruder nozzle. Means also is provided for vertical adjustment of mold support means.