TRUCK WITH A LUMINOUS AIR HOSE

Abstract

Title: TRUCK WITH A LUMINOUS AIR HOSE The invention provides a truck with a power and / or compressed air interconnection system for supplying power and / or compressed air from a tractor to a trailer of the truck. At least a compressed air hose of the interconnection system is luminous and comprises a first connector for connecting to a compressor outlet port on the tractor, a second connector for connecting to an air inlet port on the trailer, and a translucent hose sleeve. The compressed air hose has an integrated light source and one or more diffusing light guides that extend from the light source through the translucent hose sleeve, and that homogenously diffuse light generated by the light source over a length of the compressed air hose. [FIG 1]

Description

l P 137274NL00 Title: TRUCKWITHALUMINOUSAIR HOSE The invention relates to a truck with a power and / or compressed air interconnection system for supplying power and / or compressed air from a tractor to a trailer ofthe truck. Trucks are typically provided with an interconnection system between the tractor (the front part with the engine) and the trailer (the cargo-carrying part), for both power transmission andpneumatic (compressed air) systems. These systems enable the trailer to be safely towed, powered, and controlled. The electrical power transmission links the tractor's electrical circuits to the trailer, providingpower for lights, turn signals, brake lights, and other electrical components or auxiliary systems. Transmission of compressed airmay be needed for operating pneumatic systems ofthe trailer, such as air suspension systems. Hence, it is important that the interconnection is properly established, and remains functional for as long as the truck is in use. For example, in order to prevent that the connection is broken during driving due to relative motion between the tractor and trailer, the power and air lines ofan interconnection system are often coiled to provide exibility. Notwithstanding, it remains a challenge to quickly and efciently connect the power and air lines. The area between the tractor cabin and the trailer front end, where the air hose and electrical connections or interfaces are located, may be poorly visible, especially duringlow ambient light conditions, e.g. on cloudy days or at nighttime. An additional work lamp, or ood light, may be providedbetween the cabin and trailer to light up the area. However, as the area behind the cabin usually comprises a relatively large number oftechnical components, itmay be difcult to effectively illuminate the area. For example, typical work lights consume a relatively large amount ofenergy and tend to illuminate more ofthe surroundings than necessary. The brightness ofthe worklamp can confuse and disorient the user if it is in their line of sight. Conversely, when the work lamp is positioned outside the users field ofview, itmay create drop shadows due to the user or other objects present in the light beam, thereby decreasing visibility ofthe connections to be illuminated. In order to avoid such drop shadows, the user must adapt their own position andmovements when attempting to connect power and air lines between the tractor and the trailer, taking into account the position ofthe work lamp, also when verifying whether the connection has indeedbeen established properly. Furthermore, to ensure that the connection remains intact during operating conditions ofthe truck, it should be noted that power and / or air lines are not tangled up or stuck behind other parts in the area. SUMMARY It is an object ofthe present invention to address the issues mentioned above. To this end, the present invention provides a truck as dened in the appended claims. The truck comprises a power and / or compressed air interconnection system for supplying power and / or compressed air from a tractor to a trailer ofthe truck. At least a compressed air hose ofthe interconnection system is luminous. Said compressed air hose comprises a rst connector for connecting to a compressor outlet port on the tractor, a second connector for connecting to an air inlet port on the trailer, and a translucent hose sleeve extending between the rst and second connector and arranged for guiding compressed air from the tractor to the trailer. The compressed air hose has an integrated light source and one or more diffusing light guides. The one or more diffusing light guides extend from the light source through the translucent hose sleeve and are arranged for homogenously diffusing light generatedby the light source over a length ofthe compressed air hose. Accordingly, in contrast to conventional working lights which have a fixed position and are prone to creating drop shadows due to objects or people present in the often very bright light beam, the present invention provides a compressed air hose that is luminous, in that the air hose emits diffuse light over a length ofthe air hose. In this way, the working area between the cabin and the trailer can be illuminated locally around the compressed air hose to better connect the compressed air hose and other connectors, without creating inconvenient drop shadows. By utilizing the concept ofa luminous compressed air hose as described herein, a separate worklamp in the area behind the cabinmay be obsolete. In some embodiments, more than one compressed air hose can be present in the interconnection system. The interconnection system can for example comprise two or more compressed air hoses that are colored differently, e.g. red and yellow. Preferably at least one of said multiple air hoses is luminous. The diffuse light emitted by said luminous compressed air hose may be colored by using a colored LED, and / or a colored translucent hose sleeve. Since the light source is an integral part ofthe compressed air hose, it is automatically moved to where the light is needed, and the user cannot obstruct the light beam. Compared to conventional work lights, or ood lights, the light emitted by the compressed air hose ofthe present invention is not as bright since it only locally emits a diffuse light that is sufficient to illuminate the direct surroundings ofthe compressed air hose, e.g. a space up to 1.5 meters around the compressed air hose with at least 5 lux (i.e. lumen per square meter), preferably at least 10 lux, but preferably less than 30 lux. Considering the diffuse, i.e. indirect, illumination provided by the compressed air hose with limited light intensity, there is no dazzling effect for the user operating or connecting the power and / or air hose, nor for other spectators who are in the vicinity ofthe truck. By applying one or more lightguides in combination with a light source, preferably anLED light source, the compressed air hose body can become homogenously luminescent and the diffused outcoupling oflight can be used to illuminate the working environment, in particular the area between the cabin and the trailer where the air hose and electrical connections and interfaces are located. The air hose can thus provide an alternative to work lamps as used in conventional practice. By having the one or more light guides extend though the hose sleeve, thus integrated in the hose, the outer surface ofthe compressed air hose can remain ush and free ofsharp edges, which may be important for a user as this avoids potential injury. Said integral packaging ofthe one or more lightguides within the compressed air hose also prevent damage to the air hose itself. It is important to note that the environment in which the compressed air hose is used is often wet and dirty and full ofrough surfaces and sharp edges. The compressed air hose ofthe present inventionmay be congured to be in accordance with applicable (safety) regulations for interconnection systems. However, this is not necessary. The compressed air hose may also be configurable to other settings by the user, e.g. to a preferred personalized conguration. The compressed air hose may be arranged for providing feedback to the user about the connection between the tractor and the trailer. To ensure proper functioning, the compressed air hose connection is ideally free ofleakage. However, in conventional settings itmay not always be detectable by the user whether or not there is a leakage in the hose, due to a noisy environment or due to user hearing impairment. Hissing noises and other signs ofmisconnection could therefore be missed. By having the air hose provide direct feedback to the user, rather than via a warning sign in the dashboard, any failures in the connection can quickly be noticed. In preferred embodiments, the compressed air hose comprises a control unit arranged for controlling the light source ofthe air hose. Said control unit may be arranged for providing feedback about a connection between the tractor and the trailer to a user by providing a light signal. The light signal can for example comprises a change ofintensity of, a repeated ashing and / or, in case the light source comprises a multicolor LED, a change of color ofthe light emittedby the compressed air hose. Since the light source and light guide(s) are integrated, the compressed air hose itselfcan provide the status ofthe connection by ashing or changing color or intensity. This way offeedback is more direct than via a status indicator in the dashboard. In some embodiments, the compressed air hose comprises an interface for receiving an input signal, wherein the control unit is arranged for activating the light source in response to the input signal. For example, the control unit may be congured to activate the light source in response to detecting that the compressed air hose is unpluggedfrom a holder. The compressed air hose e.g. comprises a coupling interface for coupling to the holder. Said coupling interface may include a switch that is arranged to change from a first state to a second state in response to a user unplugging the air hose from the holder. The state change may in turn generate a control signal for the control unit to activate the light source ofthe air hose. Alternatively, or additionally, the compressed air hose may comprise an interface with a user operable switch, e.g. in the vicinity ofthe rst or second connector. The control unitmay be configured to activate the light source in response to the user operating the switch from a rst state to a second state. Alternatively, or additionally, the control unit can be arranged for deactivating the light source when: (a) a time periodfrom receiving the input signal lapses, and / or (ii) a driving velocity ofthe truck exceeds a threshold. In this way, it can be prevented that the light source remains activated, thus emitting diffuse light, when it is no longer needed to illuminate the area between the cabin and the trailer. The abovementioned time period can e.g. be set by the user to a preferred time period, such as five minutes or any other time period that provides sufficient time for the user to connect the air hose and / or power lines, without unduly keeping the light source activated after the connection has been established. As another or further option, the control unitmay be congured such that the light source is deactivatedwhen the truck is moving at a certain driving velocity, e.g. at least 10 or 15 km / h. This thresholdmay be congurable by the user. The one or more light guides may comprise exible strands made of a polymer material, preferably acrylic, polycarbonate, or polyethylene, or any other material that is able to guide light over a length ofthe air hose, e.g. a length of at least one meter, while producing a diffuse light. The one or more light guides are preferably co-extruded with the hose sleeve. Coextrusion is the process offorming an extrudate composed of more than one thermoplastic melt stream. In this way, the compressed air hose can be manufacturedfrom a combination ofpolymers with different properties, when the melting temperatures ofthese polymers are relatively close together. For example, the hose sleeve can be made of a different material than the one or more light guides. In this way, multiple different functions and properties can be obtained, e.g. guiding light via the one or more light guides, as well as constraining pressurized air inside the air hose by the hose sleeve. The one or more light guides may extend through the hose sleeve in a straight line, e.g. two light guides spaced apart on opposing sides ofthe hose sleeve, or multiple light guides uniformly distributed tangentially inside the hose sleeve. By using more individual light guides, the light intensity ofthe compressed air hose can be increased. Individual light guides may mutually differ in axial length. For example, some light guides may extend from the rst connector all the way to the second connector, while other, parallel light guides extendfrom one ofthe connectors over only a part ofthe length ofthe compressed air hose, e.g. up to 50%, 80% or less of the length. In this way, the produced light intensity can be larger near the connector. Alternatively, the one or more light guides may have a helical or coil shape inside the hose sleeve, e.g. wound about the internallumen ofthe hose sleeve. In such cases, the pitch ofthe helix or coil shape can be variable across the axial length ofthe compressed air hose, in order to provide different sections that produce different light intensities. For example, the pitchmay be smaller near the first and / or second connector to locally increase the light intensity near the connector(s). More than one light source may be integrated in the compressed air hose. For example, the compressed air hose may comprise a rst light source at the rst connector and a second light source at the second connector, and the one or more light guides may extendbetween the first and second light source. In this way, light is transferredfrom both ends of the compressed air guide into the one or more light guides. In order to facilitate transmission oflight from the one or more light guides through the hose sleeve towards the surroundings, the hose sleeve can have a locally reduced wall thickness around the one or more light guides compared to other sections ofthe hose sleeve. Preferably, the light source is integrated in the rst connector, or in the second connector. The rst or second connector can thus shield the light source, on one hand to protect the light source against damage, and on the other hand to prevent than the light source directly illuminates the surroundings rather than via the one or more light guides. The first and / or second connector can e.g. comprise an opaque and relatively rigid polymer casing, made ofpolyvinylchloride (PVC) or polyurethane (PU) for example. The light source preferably comprises aLED ring. To efficiently transfer light, theLED ringmay be aligned with the hose sleeve such that theLED ring is in an axial extension ofthe hose sleeve. In case ofa circular cross section, the diameter oftheLED ringmay e.g. correspond with a diameter ofthe hose sleeve. The light source may furthermore be coaxially aligned with the hose sleeve. However, the hose sleeve is not necessarily circular, but can also have an elliptical, square, or any other type ofcross section, and the shape oftheLED ringmay be chosen accordingly. In preferred embodiments, the compressed air hose further comprises a torch light integrated in the rst and / or second connector and arranged for directly emitting a torch lightbeam from said first and / or second connector into an ambient environment. The light source used for illuminating the hose sleeve via the one or more light guides, i.e. internal lighting, can also be used for providing the torch light, i.e. external lighting. Optionally, the compressed air hose has an incapsulated power supply for powering the light source and / or the torch light. Since the compressed air hose is exible, it is possible to accurately aim the torch light towards an object ofinterest, thereby avoiding shadows createdby the user or other obstacles, andmaking it easier to illuminate areas compared to a static light source. BRIEF DESCRIPTIONOFTHE DRAWINGS The invention will be further elucidated in the gures: FIG. 1 illustrates an embodiment ofa truck with a luminous compressed air hose; FIGs. 2A-B provide detailed views ofan embodiment ofthe luminous compressed air hose; FIG. 8 provides another detailed view ofan embodiment ofthe luminous compressed air hose; FIGs. 4A-B provide section views of different embodiments ofthe luminous compressed air hose. DETAILED DESCRIPTION The invention is described more fully hereinafter with reference to the accompanying drawings, in which embodiments ofthe invention are shown. In the drawings, the absolute and relative sizes ofsystems, components, layers, and regions may be exaggerated for clarity. Embodiments may be described with reference to schematic and / or cross-section illustrations of possibly idealized embodiments and intermediate structures ofthe invention. In the description and drawings, like numbers refer to like elements throughout. Relative terms as well as derivatives thereofshould be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description and do not require that the system be constructed or operated in a particular orientation unless stated otherwise. FIG. 1 illustrates a truck 10 comprising a power and / or compressed air interconnection system 100 for supplying power and / or compressed air from a tractor 12 to a trailer 16 ofthe truck. The power and / or compressed air interconnection system 100 is provided in the area between the rear side ofthe cabin ofthe tractor 12 and a front side ofthe trailer 16, where lighting conditions may be poor, especially at night. The tractor 12 e.g. comprises a compressor arranged for taking in ambient air and compressing said air to a working pressure.A compressor outlet port for delivering compressed airmay be provided on the tractor 12. Conversely, the trailer 16 may comprise a system arranged for utilizing compressed air, e.g. a pneumatic system or an air suspension system. In order to receive compressed air from an external source, the trailer 16 may comprise an air inlet port. As illustrated, a user 2 is trying to connect a compressed air hose 110 ofthe interconnection system between the compressor outlet port 13 of the tractor and the air inlet port 17 ofthe trailer 16. The compressed air hose 110 comprises a first connector 1 1 1 for connecting to the compressor outlet port 13, and a second connector 112 for connecting to the air inlet port. A translucent hose sleeve 115 extends between the rst and second connector 1 1 1, 112 and is arranged for transferring compressed air from the compressor outlet port 13 to the air inlet port 17. In order to allow relative movement between the tractor 12 and the trailer 16 without breaking the connection, the hose sleeve 115 is coil shaped so that it can bend and stretch as the position ofthe compressor outlet port 13 with respect to the air inlet port 17 changes, e.g. when the truck is driving. The compressed air hose 110 is luminous, in that at least the hose sleeve 115 it emits a diffuse light over a length ofthe air hose. As a result, an area or space up to 1.5 meters around the air hose 110 is illuminated, preferably with at least 5-10 lux (lumen per square meter) but less than 20- 30 lux. In this way, the user 2 can get a clear view on the area between the cabin rear end and the trailer front end, including any components located in that area, the view being sufcient for connecting the compressed air hose 110 to the compressor outlet port 13 and / or the air inlet port 17 in a quick and correct fashion. In contrast to conventional lighting solutions where a relatively high-intensity work lamp, or ood light, is used to illuminate the area, the luminous air hose 110 ofthe present invention does not create any drop shadows and does not dazzle the user due to the relatively low brightness and intensity ofthe diffuse light emittedby the luminous air hose 1 10. In the embodiment illustrated in FIG. 1, the compressed air hose 110 additionally comprises an optional torch light 120 that is integrated in the first and / or second connector 1 11, 112 and arranged for directly emitting a light beam from the rst and / or second connector into an ambient environment. For example, the exibility ofthe compressed air hose allows the user 2 to aim the torch light beam towards one ofthe ports 13, 17, to get a better view ofthe ports. The torch light function 120 is an addition to the diffuse light emittedby the compressed air hose 110 itself, and can be used to additionally illuminate an area ofinterest. The luminosity ofthe compressed air hose 110 is further explained with reference to FIGs. 2A and B, which provide detailed views ofthe hose sleeve 1 15. The compressed air hose 110 has at least one integrated light source 150, e.g. embedded in the first and / or second connector 1 1 1, 112. Optionally, the compressed air hose 110 comprises a first light source at or inside the first connector and a second light source at or inside the second connector. The integrated light source 150 is preferably anLED light source. In some embodiments the integrated light source 150 comprises an LED ring. Such anLED ring can be aligned with the hose sleeve 115 such that theLED ring is in an axial extension ofthe hose sleeve 1 15. Instead of aLED ring, the light source may comprise one or multiple individualLED elements, each ofwhich can be aligned with a respective light guide. As illustrated in FIG 2A, and further shown in detail in FIG. 3, one or more diffusing light guides 160 extend from the light source 150 through the translucent hose sleeve 1 15, and are arranged for guiding light generated by the light source 150 over a length ofthe compressed air hose 1 10, while outcoupling said light to the surroundings as it transfers through the one or more light guides 160, such that the air hose 110 itselfforms a homogenously diffusing light source. In other words, the one or more light guides 160 provide an extension ofthe light source 150 that extends along the hose sleeve 1 15. In case ofmultiple light sources, the one or more light guides 160 preferably extend between light sources. For example, in case of a first light source embedded in the rst connector and a second light source embedded in the second connector, the rst and second light source may be arranged facing each other, and the one or more light guides may extend between the opposing first and second light source, such that light enters the one or more light guides from both ends. The hose sleeve 115 preferably has a locally reduced wall thickness around the one or more light guides 160 compared to other sections ofthe hose sleeve 1 15, to facilitate the outcoupling oflight from the light guide(s) toward the ambient environment, e.g. in a specific direction. The one or more light guides can for example comprise one or more exible strands made of a polymer material, preferably acrylic, polycarbonate, or polyethylene. These materials are generally clear, but can also be colored to produce diffuse light in a color that differs from the light produced by the light source. For example, one ofthe light guidesmay be red, and another one may be green, or any other color. Similarly, the hose sleeve 115 may be transparent yet colored. The light guide(s) can e.g. be incorporated in the hose sleeve by co-extrusion. The strand(s) may extend straight alongside the internal lumen ofthe hose sleeve 1 15, ormay be braided or coiled around the internal lumen, e.g. forming a helical shape. Alternatively, the light guide 160 may have a tubular shape, or C-shape, that extends through the wall ofthe hose sleeve and at least partially surrounds the internal lumen. As illustrated in FIGs 2A and B, the compressed air hose 110 optionally further comprises a control unit 200 arranged for controlling the light source ofthe air hose. The control unit 200 may be integrated, or embedded, in the rst and / or second connector 1 1 1, 1 12. Such a control unit 200 can e.g. be arranged for providing feedback about a connection between the tractor and the trailer to a user by controlling the light source to provide a light signal. In other words, the luminous air hose 110 can be arranged for providing feedback to the user about a status ofthe connection between the tractor and trailer ofthe truck and / or about the integrity ofthe air hose 110 itself. The control unit 200 may for example include sensor means to determine the status ofthe connection or the air hose integrity. For example, the sensor meansmay comprise a pressure sensor arranged for measuring a pressure inside the compressed air hose, to detect leakages. In another example, the sensor means may comprise a switch that detects whether the rst or second connector ofthe compressed air hose is properly attached to the respective compressor outlet port and air inlet port. Such a switch may be provided as part of a coupling interface ofthe rst and / or second connector. For example, upon correctly coupling the connector to its port, the switch is pressed and thereby provides an input signal to the control unit, which in turn is configured to control or activate the light source based on the input signal. The switchmay also be manually operable by the user, in order to activate the light source before any ofthe connectors are coupled to their ports. In order to prevent that the light source remains activatedwhen illumination is no longer necessary, the control unit 200 can be arranged for automatically deactivating the light source when a time periodfrom receiving the input signal lapses, or when a driving velocity of the truck exceeds a threshold, e.g. 15 km / h or more. The light signal can e.g. comprise a change ofintensity ofthe light emitted by the compressed air hose. For example, in case of a proper connection, the intensitymay be decreased with respect to an initial intensity. Alternatively, or additionally, the light signal can comprise a repeated ashing ofthe light source. For example, in case the connection is faulty, the control unit 200 may be arranged for having the light source ash multiple times to indicate that attention and / or action is required from the user. In case the light source comprises a multicolor LED, the light signalmay additionally or alternatively comprise a change of color ofthe light emitted by the compressed air hose. For example, a green or blue color may be indicative of a proper connection, while a red or orange colormay be indicative of a faulty connection. Instead of a multi-colorLED the same l4 effect can be obtained with one or more single colorLEDs combined with colored light guides to produce certain colors, as described earlier herein. FIGs 4A andB provide exemplary cross sections ofthe compressed air hose 1 10, providing several options to integrate, e.g. by co-extrusion, one or more light guides 160 inside the hose sleeve 1 15. While in FIGs. 4A andB the light guides 160 as well as the hose sleeve 115 are shown with a circular cross section, other cross sections can be used without deviating from the invention described herein. For example, the hose sleeve 115 may have a rectangular, oval, or hexagonal cross section. Conversely, the one or more light guides 160 can have a triangular, elongate, or any other shape square cross section. In some cases itmay be preferred to incorporate a single light guide 160 in the hose sleeve 115, e.g. on one side ofthe hose sleeve 115 as illustrated in FIG. 4A. However, the presence ofa light guide may decrease the exibility ofthe compressed air hose, or at least creates a non-uniform exibility over the cross section. To improve symmetry, a pair oflight guides 160 can be incorporated on opposing sides ofthe hose sleeve 115 as illustrated in FIG. 4B. More than two light guides 160 may be equally distributed around the internallumen 116 ofthe hose sleeve 1 15. Alternatively, a single light guide may have an O-shape or a C-shape that extends at least partially about the internal lumen 1 16. It will be clear to the skilled person that the invention is not limited to any specic embodiment herein described and that combinations or modications are possible, in as far as these can be considered within the scope ofthe appended claims. Also kinematic inversions are considered inherent to the invention disclosed herein. In the claims, any reference signs shall not be construed as limiting the claim. The terms 'comprising' and including when used in this description or the appended claims should not be construed in an exclusive or exhaustive sense but rather in an inclusive sense. Thus, expressions as 'including' or comprising as used herein does not exclude the presence of other elements, additional structure or additional acts or steps in addition to those listed. Furthermore, the words a and an shall not be construed as limited to only one, but instead are used to mean at least one, and do not exclude a plurality. Features that are not specifically or explicitly described or claimedmay additionally be included in the structure ofthe invention without departingfrom its scope. Expressions such as: "means for ... should be read as: "component congured for ..." or "member constructed to ..." and should be construed to include equivalents for the structures disclosed. The use ofexpressions like: "critical", "preferred", "especially preferred" etc. is not intended to limit the invention. To the extent that structure, material, or acts are considered to be essential they are inexpressively indicated as such. Additions, deletions, and modifications within the purview of the skilled person may generally be made without departing from the scope of the invention, as determined by the claims. 1. A truck with a power and / or compressed air connection system for supplying power and / or compressed air from a tractor to a truck semi-trailer, where at least one compressed air hose of the connection system is luminous, where the compressed air hose a first connector includes for connection to a compressor exhaust port on the tractor, a second connector for connection to an air intake port on the semi-trailer, and a translucent hose sleeve extending between the first and second connector and is designed for conducting compressed air from the tractor to the semi-trailer; where the compressed air hose an integrated light source and one or has more diffusing light guides; whereby one or more diffusing light guides extend from the light source through the translucent hose sleeve, and arranged are for the homogeneous diffusion of light that is emitted by the light source is generated over a length of the compressed air hose. 2. The truck according to conclusion 1, where the compressed air hose includes a control unit that is configured to control the light source of to regulate the air hose, whereby the control unit is configured to provide feedback to a user about a connection by giving a light signal between the tractor and the semi-trailer. 3. The truck according to conclusion 2, where the light signal a change in the intensity of the light that passes through the Compressed air hose is emitted, includes. 4. The truck according to one of the conclusions 23, whereby the light signal a repeated flashing of the light comprises that by the compressed air hose is being blasted. 5. The truck according to one of the claims 24, whereby the light source comprises a multi-color LED, and where the light signal a change in color of the light that by the Compressed air hose is emitted, includes. 6. The truck according to one of the conclusions 25, whereby the compressed air hose includes an interface for receiving a input signal, where the control unit is configured to the to activate the light source in response to the input signal. 7. The truck according to conclusion 6, where the control unit is configured to deactivate the light source when: a period of time from the receipt of the input signal expires; or a driving speed of the truck a threshold value exceeds 8. The truck according to one of the preceding conclusions, whereby the one or more light guides comprise one or more flexible strands, made of a polymer material, preferably acrylic, polycarbonate or polyethylene. 9. The truck according to one of the preceding conclusions, whereby the hose sleeve has a locally reduced wall thickness around the one or more light guides compared with other sections of the hose sleeve 10. The truck according to one of the preceding conclusions, whereby the light guide is co-extruded with the hose sleeve. 11. The truck according to one of the preceding conclusions, whereby the compressed air hose a first light source at the first connector and a includes second light source at the second connector, and where the one or more light guides located between the first and second light source extend. 12. The truck according to one of the preceding conclusions, whereby the The light source is integrated into the first connector. 13. The truck according to one of the preceding conclusions, whereby the light source comprises an LED ring, where the LED ring is aligned with the hose connection such that the LED ring is in the axial lies the extension of the hose connection. 14. The truck according to one of the preceding conclusions, whereby the compressed air hose further includes a flashlight that is integrated into the first and / or second connector and is configured to a flashlight beam from the first and / or second connector directly to to broadcast an environment. 15. The truck according to one of the preceding conclusions, whereby the The compressed air hose is designed to cover a space of up to 1.5 meters around the to illuminate air hose with at least 5 lux, preferably at at least 10 lux. 1 / 4 10 12 16 2 115 112 111 17 110 120 13 100 Fig. 1

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