Abstract: A quick connector for connection to a complementary counterpart comprises a coupling piece and a retainer for a section of a fluid having a coupling center axis defining an axial direction AD, a radial direction RD and a circumferential direction CD. The retainer is allocated to the coupling end, wherein the retainer has at least one retaining element for retaining the counterpart and at least one actuating element for opening the retainer for pulling the counterpart out of the coupling piece. The coupling piece comprises a first flange at the coupling end, wherein the first flange has a flange opening so as to insert a tool into the flange opening so that the tool can exert a force on the retainer and the actuating element, respectively. The flange opening has an outer border, wherein the outer border lies in radial direction RD outward of the flange opening.

Abstract: A connector for connecting two fluid-conducting elements, in particular for connecting two motor vehicle pipelines, with a female plug-in part and a male plug-in part that can be plugged into the female plug-in part. The male plug-in part can be fixed on the female plug-in part via at least one fixing element. At least one indicator element is provided, which indicates the properly or completely fixed state of the male plug-in part which has been reached via the fixing element. When the male plug-in part is inserted into the female plug-in part, the indicator element is displaced outward in the radial direction. A radial outer position of the indicator element shows the properly fixed state of the male plug-in part on the female plug-in part.

Abstract: A connector for connecting two fluid-conducting elements, with a female plug-in part and a male plug-in part that can be inserted into the female plug-in part, wherein a retainer is hooked up to the female plug-in part, and can be used to fix the male plug-in part to the female plug-in part. The female plug-in part has at least one verification element, in particular in the form of a code, which in the unfixed state is unreadable or incomplete.

Abstract: Quick connector having a coupling body and a multifunctional part with a retention unit and an indicator. The coupling body includes a head portion at one end and a plug-in portion at the other end, the plug-in portion configured for attaching to a first tube, the head portion having an axial opening for introduction of a counterpart with a circumferential collar. The head portion has at least one radial opening for inserting the multifunctional part, the multifunctional part having a back for manual operation for the purpose of being inserted into the coupling body. The retention unit has two retention legs, and the indicator has two indicator limbs movable independently of the retention legs when inserting the circumferential collar. The indicator limbs and the coupling body are configured so that the indicator can be transferred from a partially inserted preassembly position to a fully inserted assembly position via movement of the indicator limbs.

Abstract: Multilayer motor vehicle tube for conducting at least one fluid medium, wherein the tube comprises a fluid duct and a tube wall that surrounds the fluid duct. The tube wall is multilayered and comprises at least three layers, specifically having the following layer composition. An external layer is provided that consists of at least one polyamide, in particular of at least one aliphatic polyamide. Furthermore, an adhesion-promoting layer is provided and an internal layer consisting of at least one thermoplastic elastomer. The overall layer thickness d of the tube wall is from 0.3 to 3.0 mm.

Abstract: A motor vehicle fluid line for conducting at least one fluid medium, in particular for conducting urea solutions for SCR catalytic converter systems, at least one fluid-carrying pipe and at least one fluid-carrying connector that is connected to the pipe being provided. The pipe comprises a fluid-carrying outer line and a fluid-carrying inner line that is received in the outer line over at least part of its length L. The connector comprises a first connecting branch that is in fluid communication with the outer line, and comprises a second connecting branch that is in fluid communication with the inner line.

Abstract: Tube fastening unit of at least one fastening clip and at least one motor vehicle tube fastened to the fastening clip. The motor vehicle tube has an outer surface made of plastic, which is welded with the fastening clip. The fastening clip has at least one welding element, which at least partially consists of a weldable plastic which is welded with the outer surface of the tube. The welding element is positively and/or non-positively fastened to the fastening clip.

Abstract: A connector for connection between two fluid-conveying elements, in particular for connection between two motor vehicle pipes, with a female plug-in part and a male plug-in part which is insertable into the female plug-in part. A retainer is connected to the female plug-in part, the retainer allowing the male plug-in part to be fixed, in the inserted state, to the female plug-in part. The retainer may be pivoted from an open position to a fixing position—and vice versa—about a pivot axis arranged in the region of the outer surface of the female plug-in part.

Abstract: A tubing for a fluid medium of motor vehicles, in particular for an aqueous urea solution, comprises a tube, at least one heating wire, and a plug arranged on a tube end of the tube. The plug has a plug shank and a housing which surrounds the tube end and the heating wire. The plug shank comprises a latching means, preferably a collar, for latching in a connector. The tube has an inner tube and a contact element, wherein the heating wire is arranged between the inner tube and the contact element. The contact element brings the heating wire into contact with the inner tube, and the housing partially surrounds the contact element. A first segment of the heating wire runs on the tube end between the contact element and the inner tube, wherein a second segment of the heating wire runs between the contact element and the housing.

Abstract: A connector includes a connection part formed with two connection ends, an assembly aid and an encapsulation. The inner channel of the connection part connects the connection ends to each other for the purpose of the passage of a fluid medium. The connection part has a middle section between the connection ends, and the assembly aid is arranged at least in a partial region of the middle section on the outside of the connection part. A heating means is arranged on the assembly aid, and the encapsulation covers at least a portion of the heating means. Further, the assembly aid is arranged on the connection part by means of force-fitting.

Abstract: A tubing for a fluid medium of motor vehicles, particularly for an aqueous urea solution, comprises a tube and a connector arranged on one tube end of the tube. The connector has a connecting part, a heating wire, and a housing which encloses the connecting part and the heating wire. The connecting part comprises a retaining element for an engaging connection of a plug that can be plugged into the connecting part. The heating wire extends at least from the connecting end associated with the tube end into the intermediate section, wherein at least along the intermediate section of the connecting part, the connector is preferably free of alignment elements arranged in or on the connecting part and used for aligning the heating wire.

Abstract: Use of tubing as temperature control tubing in motor vehicles, wherein a temperature control medium is passed through the tubing. The tubing has the following layer structure from the outside inward: an exterior layer of at least one polyolefin, a first adhesive barrier, a barrier layer of at least one polyamide, a second adhesive barrier and an interior layer of at least one polyolefin. The entire wall thickness of the tubing is 0.5 to 3.5 mm.

Abstract: A connection unit having a connector and at least one fluid line that is connected to the connector, wherein the connector has at least two connection ends and a connector section that connects the connection ends to one another. A fluid line end of a fluid line engages with at least one connection end of the connector. At least one compensation element is connected to the fluid line in the area of the fluid line end of the fluid line, the compensation element being supportable on at least one support stop via at least one spring element. Due to a pressure increase in the connector section, the compensation element is movable against the restoring force of the spring element in the direction of the support stop, with an increase in the internal volume of the connector section.

Abstract: An internal tube for tanks, particularly fuel tanks of automobiles, wherein the tube has a fluid channel and a tube wall that encloses the fluid channel, wherein the tube wall has a multilayer design and is composed of at least three layers, with one inner layer based on at least one polyolefin being provided, with at least one central layer based on at least one polyamide being present, and with one outer layer based on at least one polyolefin being provided.

Abstract: A connector comprising a connection part, an assembly aid and an encapsulation. The connection part comprises two connection ends, wherein an inner channel connects the connection ends to each other for the purpose of the passage of a fluid medium. The connection part has a middle section between the connection ends, wherein the assembly aid is arranged at least in a partial region of the middle section on the outside of the connection part. A heating means is arranged on the assembly aid, wherein the encapsulation covers at least a portion of the heating means. The assembly aid is arranged on the connection part by means of force-fitting.

Abstract: Connector assembly, and/or motor-vehicle connector assembly, with at least one connector and at least one media line connected to the connector. The media line is electrically heated, a heat-conducting element being arranged in the transition region between connector and media line. The heat-conducting element extends with a first heat-conducting section into the media line and with a second heat-conducting section into the connector. By means of the electric heating of the media line, the heat-conducting element is heated, and/or indirectly heated, and in particular is heated and/or indirectly heated as far as the region of the connector.

Abstract: A multilayered motor vehicle pipeline, wherein the pipeline has at least two layers, preferably at least three layers of plastic. At least one surface of at least one layer connected to another layer is configured profiled, wherein the profiling has maxima and minima. The height difference ?h between the maxima and the minima directly adjacent to the maxima is between 1 and 100 ?m.

Abstract: A quick connector for making a releasable connection in a fluid line with a connector body, a male member, a retainer and a verification element. The connector body comprises a through bore, wherein the male member introduced into the through bore is releasably fixable in the through bore by the retainer. The retainer comprises a ring and the verification element has an annular body. The annular body of the verification element can be displaced in an axial direction with respect to the through bore from an initial open position to a verification position when the male member is secured by the retainer in the through bore to place the verification element in a verification and locked position. In one form, the retainer includes lifting arms pivotably attached within coupling openings which cooperate with the coupling projections of the verification element to permit axial translation of the verification element to the verification position when the male member is fully inserted into the through bore.

Abstract: Connector assembly, and/or motor-vehicle connector assembly, with at least one connector and at least one media line connected to the connector. The media line is electrically heated, a heat-conducting element being arranged in the transition region between connector and media line. The heat-conducting element extends with a first heat-conducting section into the media line and with a second heat-conducting section into the connector. By means of the electric heating of the media line, the heat-conducting element is heated, and/or indirectly heated, and in particular is heated and/or indirectly heated as far as the region of the connector.

Abstract: A coupling, for a fluid line, having a retainer and a coupling body defining a throughbore extending from an inlet opening at a male member reception end which functionally receives a male member. The retainer has a crossbar, with two spaced retainer legs, and at least one locking arm. The retainer is mounted in a moveable manner to the coupling body in radial direction in relation to the throughbore. In a starting position when the male member is not or not fully inserted into the coupling body, one free end of a retainer leg rests upon a blocking surface on the coupling body blocking the retainer from shifting into a locking position, whereby the crossbar is in the starting position, protruding out of the coupling body.