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.