NL2022376B1

NL2022376B1 - Gasket for receiving a cable in a luminaire

Info

Publication number: NL2022376B1
Application number: NL2022376A
Authority: NL
Inventors: Sousa Daniel
Original assignee: Schreder Sa
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2020-08-13

Abstract

GASKET FOR RECEIVING A CABLE IN A LUMINAIRE ABSTRACT 5 A gasket for a tube-like element such as a cable, said gasket comprises a sealing body with a through-hole for the tube-like element. Said sealing body has a first base surface, a second base surface opposite the first base surface, and a side surface connecting the first base surface and the second base surface. The through-hole extends between the first base surface and the second base surface. Said sealing body comprises a cut extending between the through-hole and the side surface 10 and between the first base surface and the second base surface, such that the tube-like element can be inserted Via the cut in the through-hole. Said sealing body has an axial direction, and said cut is such that, projected onto a plane perpendicular to said axial direction, it defines a closed line whose surface area covers at least 2% of a surface area of the first base surface. 15 Figure 1A

Description

GASKET FOR RECEIVING A CABLE IN A LUMINAIRE

FIELD OF INVENTION The present invention relates to a gasket for receiving and retaining a tube-like element such as a cable. Particular embodiments relate to a gasket that can be fitted in an opening of a luminaire.

BACKGROUND Currently, in the luminaire production, a luminaire may have a plurality of different compartments that may communicate with one another, e.g. via a cable extending from one compartment to another in a tight manner using a gasket for receiving said cable. A common solution to receive and retain a cable in a gasket is to push or pull said cable from one end of a through-hole provided in said gasket to another end of said through-hole. However, this solution is not appropriate in the event that connectors of said cable cannot be unmounted. Another solution is to provide a gasket with one or more cuts in a radial plane, thereby allowing the cable to be put in the through-hole. However, such cuts have the disadvantage that the sealing is not perfect and may be decreased when fitting the gasket in an opening to be sealed. It would therefore be advantageous to provide a gasket able to receive and retain a tube-like element, such as a cable, ensuring improved water tightness of the gasket when fitted in said opening, whilst allowing an easy mounting.

SUMMARY The object of embodiments of the invention is to provide a gasket that can receive and retain a tube-like element such as a cable in a flexible and reliable way, and that can be fitted in an opening, in order to be sealed to the opening and to ensure improved water tightness. According to a first aspect of the invention, there is provided a gasket for a tube-like element sach as a cable. Said gasket comprises a sealing body with a through-hole for the tube-like element. Said sealing body has a first base surface, a second base surface opposite the first base surface, and a side surface connecting the first base surface and the second base surface. The through-hole extends between the first base surface and the second base surface. Said sealing body comprises a cut extending between the through-hole and the side surface and between the first base surface and the second base surface, such that the tube-like element can be inserted via the cut in the through- hole. Said sealing body has an axial direction, and said cut is such that, projected onto a planeperpendicular to said axial direction, it defines a closed line whose surface area covers at least 2% of a surface area of the first base surface.

By using a sealing body comprising a cut extending between the through-hole and the side surface and between the first base surface and the second base surface, the tube-like element can be inserted via the cut in the through-hole. This solution enables receiving and retaining in the gasket as defined above a tube-like element, such as a cable, whose connectors cannot be unmounted.

This solution also enables receiving and retaining in the gasket as defined above said tube-like element without having to unmount the connectors, in the event said connectors can be unmounted and the tube-like element is connected to the connectors before being inserted in the through-hole. Moreover, by providing a cut such that, projected onto a plane perpendicular to the axial direction of the sealing body, it defines a closed line whose surface area covers at least 2% of a surface area of the first base surface, said cut will ensure water tightness of the gasket when pressure is exerted.

Indeed, when fitting the gasket in an opening to be sealed, the gasket will be compressed and undergo a radial pressure, i.e, a pressure in a plane perpendicular to the axial direction of the sealing body, as well as an axial pressure, i.e., a pressure parallel to said axial direction. As the cut is such that it defines a closed line with a non-zero surface area when projected onto a plane perpendicular to said axial direction, it implies that at least a portion thereof does not extend in a plane parallel to said axial direction. For example, said at least one portion of the cut may extend in a plane perpendicular to said axial direction. Hence, the radial pressure will cause the cut to close in a plane parallel to the axial direction, and the axial pressure will cause the cut to close in the plane perpendicular to said axial direction, thereby ensuring water tightness of the gasket.

Preferably, the gasket is included in a luminaire. Preferred embodiments relate to an outdoor fuminaire. By outdoor luminaire, it is meant luminaires which are installed on roads, tunnels, industrial plants, campuses, parks, cycle paths, pedestrian paths or in pedestrian zones, for example, and which can be used notably for the lighting of an outdoor area, such as roads and residential areas in the public domain, private parking areas and access roads to private building infrastructures, etc.

According to an exemplary embodiment, the sealing body comprises a main cylindrical portion having said axial direction. The side surface comprises a corresponding main cylindrical surface intended to be in sealing contact with a wall of an opening in which the gasket is fitted.

Indeed, a shape of the sealing body having an axial symmetry, such as a cylindrical shape, may be used in order to obtain a uniform radial pressure when fitting the gasket in the opening.

According to an exemplary embodiment, the sealing body comprises a main conical portion having said axial direction. A surface area of the first base surface is larger than a surface area of the second base surface. The side surface comprises a corresponding main conical surface intended to be in sealing contact with a wall of an opening in which the gasket is fitted.

A conical shape of the sealing body may be an alternative to a cylindrical shape, since said conical shape also has an axial symmetry, thereby also obtaining a uniform radial pressure when fitting the gasket in the opening.

According to a preferred embodiment, the sealing body is provided with an outwardly protruding peripheral portion configured to be arranged and fixed to a wall portion around an opening to be sealed, with the sealing body extending in the opening.

The peripheral portion, which is part of the gasket, enables the latter to be fixed to said wall portion while the sealing body is fitted in the opening. The peripheral portion may be fixed to the wall portion by means of fastening elements such as screws and the like. Alternatively, a separate element, which is not part of the gasket, may be configured to be arranged and fixed to the wall portion, with the sealing body extending in the opening. The separate element may be fixed to the wall portion by means of fastening elements such as screws and the like.

According to a preferred embodiment, the first base surface and/or the second base surface are/is substantially perpendicular to the axial direction of the sealing body.

According to an exemplary embodiment, the through-hole has an axial direction at a non-zero angle with respect to the axial direction of the sealing body. According to another exemplary embodiment, the through-hole has an axial direction parallel to the axial direction of the sealing body.

In this way, the through-hole may have an axial direction non-parallel or parallel to the axial direction of the sealing body. In the case where the axial direction of the through-hole is parallel to the axial direction of the sealing body, an axis corresponding to the axial direction of the through- hole may or may not coincide with an axis corresponding to the axial direction of the sealing body.

According to a preferred embodiment, the cut comprises at least a first cut path on the first base surface between the through-hole and the side surface, and a second cut path on the second base surface, between the through-hole and the side surface. The first cut path and/or the second cut path may correspond substantially to a straight line.

This facilitates the performing of the cut into the sealing body, and optionally into the outwardly protruding peripheral portion, of the gasket, when present. According to an exemplary embodiment, the cut follows a discontinuous or curved surface from said first cut path to said second cut path.

The discontinuous surface may be a juxtaposition of a plurality of flat surfaces, the first flat surface extending from the first cut path and the last flat surface extending to the second cut path. Alternatively, the discontinuous surface may be a juxtaposition of a plurality of curved surfaces, or of flat and curved surfaces. The curved surface may be a continuous curved surface extending from the first cut path to the second cut path.

According to an exemplary embodiment wherein the cut follows a discontinuous or curved surface from said first cut path to said second cut path, the cut is such that, projected onto a plane perpendicular to the axial direction of the sealing body, the first cut path is at an angle a with respect to the second cut path, said angle a being larger than 5°.

As the cut is such that it defines a closed line with a non-zero surface area when projected onto a plane perpendicular to said axial direction, it implies that the first cut path and the second cut path correspond, when projected onto said plane, to distinct paths belonging to said closed line.

Moreover, as the cut follows a discontinnous or curved surface from said first cut path to said second cut path, a non-zero angle a between the first cut path and the second cut path may be defined, said angle a being larger than 5°. Preferably, said angle o is larger than 10°, more preferably larger than 20°.

According to an exemplary embodiment, the cut comprises a first cut portion comprising the first cut path, said first cut portion having a first height in an axial direction of the through-hole which is smaller than the height of the through-hole seen in said axial direction, a second cut portion comprising the second cut path, said second cut portion having a second height in said axialdirection which is smaller than the height of the through-hole seen in said axial direction, and a third cut portion connecting the first cut portion and the second cut portion.

This subdivision of the cut into at least three distinct cut portions defines one type of cut that 5 follows a discontinuous surface from said first cut path to said second cut path. For example, a pattern of such cut visible on the side surface may correspond to a “toothed” pattern, or a “zigzag” pattern.

According to a preferred embodiment, the first cut portion and the second cut portion are flat portions.

This facilitates the performing of the first cut portion and the second cut portion into the sealing body, and optionally into the outwardly protruding peripheral portion, of the gasket, when present.

According to a preferred embodiment, the third cut portion comprises at least one flat portion extending in a plane perpendicular to the axial direction of the through-hole.

The third cut portion may additionally comprise at least one flat portion extending in a plane parallel to the axial direction of the through-hole. In this way, a “toothed” pattern of the cut may be visible on the side surface.

According to a preferred embodiment, the sum of the first height of the first cut portion and the second height of the second cut portion substantially corresponds to the height of the through-hole.

According to an exemplary embodiment, the cut comprises a helical shaped portion.

A helical shape is one type of curved surface that may be followed by the cut. Such helical shape may facilitate the insertion of the tube-like element into the through-hole.

According to an exemplary embodiment wherein the through-hole has an axial direction at a non- zero angle with respect to the axial direction of the sealing body, the cut corresponds to a flat surface between the through-hole and the side surface.

The flat surface as defined above is the simplest shape of a cut to be performed. Said cut extends between the through-hole and the side surface and between the first base surface and the second base surface, and is such that, projected onto a plane perpendicular to the axial direction of thesealing body, it defines a closed line whose surface area covers at least 2% of a surface area of the first base surface. According to a preferred embodiment, the first base surface and/or the second base surface are/is provided with a surface roughness configured to limit liquid flow on the first base surface and/or on the second base surface. According to a preferred embodiment, the first base surface and/or the second base surface are/is provided with a plurality of ridges.

Said surface roughness and said plurality of ridges may help ensuring water tightness of the gasket when fitted in an opening. The combination of surface roughness and ridges may be preferable. Preferably, at least the first base surface is provided with a surface roughness and/or with ridges. The spaces between two adjacent ridges define channels configured for evacuating water from the trough-hole towards the side surface of the sealing body, and for preventing water from penetrating the through-hole and the cut. According to a preferred embodiment, a material of said gasket comprises rubber. Preferably, a Shore hardness of said material is comprised between 40 and 60, preferably between 50 and 60, The material of said gasket may comprise different types of rubber offering the above-mentioned range of Shore hardness, such as silicone, ethylene propylene diene monomer (EPDM) rubber, nitrile butadiene rubber (NBR), and the like. The Shore hardness scale ranges from 0 to 100. Higher numbers on the Shore hardness scale indicate a greater resistance to indentation and thus harder materials. Lower numbers indicate less resistance and softer materials. Materials with Shore hardness between 40 and 60, preferably between 50 and 60, are suitable for the manufacture of a gasket that ensures sufficient resistance to indentation when pressure is exerted. Indeed, as explained above, when fitting the gasket in an opening to be sealed, the gasket will be compressed and undergo a radial pressure as well as an axial pressure.

BRIEF DESCRIPTION OF THE FIGURES This and other aspects of the present invention will now be described in more detail, with reference to the appended drawings showing a currently preferred embodiment of the invention. Like numbers refer to like features throughout the drawings.

Figures 1A and 1B respectively illustrate a schematic perspective view and a schematic top view of an exemplary embodiment of a gasket; Figures 2A-2C respectively illustrate a perspective view, a cross-sectional side view, and another perspective view of an exemplary embodiment of a gasket; Figure 3 illustrates a schematic perspective view of another exemplary embodiment of a gasket; Figures 4A-4C respectively illustrate a schematic perspective view of three other exemplary embodiments of a gasket; Figure 5 illustrates a perspective view of another exemplary embodiment of a gasket; Figure 6 illustrates a schematic top view of another exemplary embodiment of a gasket; Figures 7A-7D respectively illustrate a side view, a perspective view, another side view, and another perspective view of another exemplary embodiment of a gasket; and Figure 8 illustrates a perspective view of two gaskets in a fixture provided with a camera bracket.

DESCRIPTION OF THE FIGURES The gasket 100 of Figures 1A-7D may be included in a luminaire comprising a luminaire head and a luminaire pole. The luminaire head may be connected to the luminaire pole in any manner known to the skilled person. Typical examples of such systems are street lights. In other embodiments, the luminaire head may be connected to a wall or a surface, e.g. for illuminating buildings or tunnels. As illustrated in Figure 8, the gasket 100 of Figures 1A-7D may be used in other fixtures than in luminaires, for example in a fixture wherein a camera bracket is provided. It should be clear that the gasket 100 of Figures 1A-7D may also be used in a luminaire provided with a camera bracket, or with any other component with a function other than a lighting function, such as a base station, an antenna compartment, an alarm compartment, an air quality compartment, and the like.

Figures 1A-1B respectively illustrate a schematic perspective view and a schematic top view of an exemplary embodiment of a gasket. As illustrated in Figure 1A, the gasket 100 is configured for receiving a tube-like element such as a cable C. The gasket 100 comprises a sealing body 10 with a through-hole 20 for the tube-like element. The sealing body 10 has a first base surface 11, a second base surface 12 opposite the first base surface 11, and a side surface 13 connecting the first base surface 11 and the second base surface 12. The through-hole 20 extends between the first base surface 11 and the second base surface 12. The sealing body 10 comprises a cut 30 extending between the through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that the tube-like element can be inserted via the cut 30 in the through-hole 20.

As illustrated in Figures 1A and 1B, the sealing body 10 has an axial direction A. The sealing body 10 may comprise a main cylindrical portion 40 having said axial direction A, as illustrated in the embodiment of Figure 1A. ln other embodiments, the sealing body may comprise a main conical portion having said axial direction A. The first base surface 11 and the second base surface 12 may be substantially perpendicular to said axial direction A, as illustrated in the embodiment of Figure LA. In other embodiments, the first base surface 11 and/or the second base surface 12 may not be substantially perpendicular to said axial direction A. The through-hole 20 may have an axial direction At which is at a non-zero angle with respect to the axial direction A of the sealing body

10. In the embodiment of Figure 1A, the through-hole 20 has an axial direction At parallel to the axial direction A of the sealing body 10. In other embodiments, the through-hole 20 may have an axial direction At non-parallel to the axial direction A of the sealing body 10. The axis corresponding to the axial direction At of the through-hole 20 may coincide with the axis corresponding to the axial direction A of the sealing body 10, although in the embodiment of Figures 1A and IB the axis corresponding to said axial direction At does not coincide with the axis corresponding to said axial direction A. As illustrated in Figures 1A and 1B, the cut 30 is such that, projected onto a plane P perpendicular to said axial direction A, it defines a closed line whose surface area covers at least 2% of a surface area of the first base surface 11. Preferably, said surface area covers at least 10% of the surface area of the first base surface 11, more preferably at least 20% of the surface area of the first base surface 11. The cut 30 is such that it implies that at least a portion thereof does not extend in a plane parallel to said axial direction A. For example, said at least one portion of the cut 30 may extend in a plane P perpendicular to said axial direction A. The cut 30 comprises a first cut path 31 on the first base surface 11 between the through-hole 20 and the side surface 13, and a second cut path 32 on the second base surface 12, between the through-hole 20 and the side surface 13. The cut 30 is such that, projected onto said plane P, the first cut path 31 is at an angle a with respect to the second cut path 32, said angle a being larger than 5°. Preferably, said angle « is larger than 10°, more preferably larger than 20°. The first cut path 31 and/or the second cut path 32 may correspond substantially to a straight line, as illustrated in the embodiment of Figures 1A and 1B. In other embodiments, the first cut path 31 and/or the second cut path 32 may correspond substantially to a curved line. In the embodiment of Figures 1A and IB, the cut 30 follows a discontinuous flat surface from said first cut path 31 to said second cut path 32. In other embodiments, the cut 30 may follow a curved surface from said first cut path 31 to said second cut path 32,

As illustrated in Figure 1A, the cut 30 comprises a first cut portion 61, a second cut portion 62, and a third cut portion 63 connecting the first cut portion 61 and the second cut portion 62. The first cut portion 61 comprises the first cut path 31, said first cut portion 61 having a first height hl in the axial direction At of the through-hole 20 which is smaller than the height h of the through-hole 20 seen in said axial direction At. The second cut portion 62 comprises the second cut path 32, said second cut portion 62 having a second height h2 in said axial direction At which is smaller than the height h of the through-hole 20 seen in said axial direction At. The sum of the first height ht of the first cut portion 61 and the second height h2 of the second cut portion 62 substantially corresponds to the height h of the through-hole 20.

The first cut portion 61 and the second cut portion 62 may be flat portions, as illustrated in the embodiment of Figure 1A. In other embodiments, the first cut portion 61 and/or the second cut portion 62 may be curved portions. The third cut portion 63 may comprise at least one flat portion 63 extending in a plane perpendicular to the axial direction At of the through-hole 20, as illustrated in the embodiment of Figure 1A where the third cut portion 63 only comprises one flat portion 63. In other embodiments, the third cut portion 63 may comprise at least one curved portion 63. Figures 2A-2C respectively illustrate a perspective view, a cross-sectional side view, and another perspective view of an exemplary embodiment of a gasket.

As illustrated in Figure 2A, the gasket 100 is configured for receiving a tube-like element such as a cable C. The gasket 100 comprises a sealing body 10 with a through-hole 20 for the tube-like element. The sealing body 10 has a first base surface 11, a second base surface 12 opposite the first base surface 11, and a side surface 13 connecting the first base surface 11 and the second base surface 12. The through-hole 20 extends between the first base surface 11 and the second base surface 12. The sealing body 10 comprises a cut 30 extending between the through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that the tube-like element can be inserted via the cut 30 in the through-hole 20. The sealing body 10 has an axial direction A. The first base surface 11 and the second base surface 12 are substantially perpendicular to said axial direction A. The through-hole 20 has an axial direction At parallel to the axial direction A of the sealing body 10. In contrast to the embodiment of Figures 1A and 1B, in the embodiment of Figures 2A-2C the axis corresponding to the axial direction At of the through-hole 20 coincides with the axis corresponding to the axial direction A of the sealing body

10.

As illustrated in Figure 2A, the cut 30 comprises a first cut path 31 on the first base surface 11 between the through-hole 20 and the side surface 13, and a second cut path 32 on the second base surface 12, between the through-hole 20 and the side surface 13. The first cut path 31 and the second cut path 32 correspond substantially to a straight line.

The cut 30 follows a discontinuous flat surface from said first cut path 31 to said second cut path 32. The cut 30 comprises a first cut portion 61 comprising the first cut path 31, a second cut portion 62 comprising the second cut path 32, and a third cut portion 63 connecting the first cut portion 61 and the second cut portion 62. In the embodiment of Figures 2A-2C, the sealing body 10 comprises a main cylindrical portion 40 having said axial direction A.

The side surface 13 comprises a corresponding main cylindrical surface 43 intended to be in sealing contact with a wall W1 of an opening O in which the gasket 100 is fitted.

In other embodiments, the side surface 13 may comprise a corresponding main conical surface intended to be in sealing contact with a wall W1 of an opening O in which the gasket 100 is fitted.

In such embodiments, a surface area of the first base surface may be larger {5 than a surface area of the second base surface.

This is also the case when an outwardly protruding peripheral portion 50 is provided to a sealing body 10 comprising a main cylindrical portion 40, as discussed in the following.

When fitted in said opening O, the gasket 100 will be compressed and undergo a radial pressure, i.e., a pressure in a plane perpendicular P to the axial direction A of the sealing body 10, as well as an axial pressure, i.e, a pressure parallel to the axial direction A of the sealing body 10. The radial pressure will cause the cut 30 to close in a plane parallel to said axial direction A, and the axial pressure will cause the cut 30 to close in the plane P perpendicular to said axial direction A.

For example, a diameter of the main cylindrical portion 40 of the sealing body 10 before fitting the gasket 100 in the opening O may be comprised between 30 mm and 50 mm.

For example, a diameter of the through-hole 20 before fitting the gasket 100 in the opening O may be comprised between 2.5 mm and 4.5 mm.

For example, the through-hole may receive and retain a tube-like element such as a cable C whose diameter is comprised between 5 mm and 10 mm.

For example, a diameter of the opening O may be comprised between 30 mm and 50 mm.

The diameter of the opening O is chosen smaller than the diameter of the main cylindrical portion 40 of the sealing body 10, in order to create a radial pressure when the gasket 100 is fitted in the opening O, such that the main cylindrical surface 43 of the side surface 13 is in sealing contact with the wall WI of the opening O.

It should be noted that the above-mentioned dimensions of the gasket 100 are only illustrative, and may vary depending on the application.

As illustrated in Figures 2A-2C, the sealing body 10 may be provided with an outwardly protruding peripheral portion 50 configured to be arranged and fixed to a wall portion W2 around the opening O to be sealed, with the sealing body 10 extending in the opening O.

The peripheralportion 50 may be fixed to the wall portion W2 by means of fastening elements (not shown) such as screws and the like. Said fastening elements may extend through a plurality of slits 51 arranged in the first base surface 11, and may be arranged in a plurality of corresponding holes in the wall portion W2. In the embodiment of Figure 2C, three slits 51 are present in the first base surface 11, as well as three corresponding holes in the wall portion W2. In other embodiments, more or less than three slits and corresponding holes may be present, but at least two slits and corresponding holes may be present. The fastening operation of the gasket 100 may compress the gasket 100 and cause a supplemental axial pressure on the gasket 100. For example, a diameter of the first base surface 11 when the sealing body 10 is provided with the peripheral portion 50 may be comprised IO between 50 mm and 60 mm. For example, a diameter of the recess defined by the wall portion W2 around the opening O may be comprised between 50 mm and 60 mm. The diameter of the recess defined by the wall portion W2 around the opening O is chosen smaller than the diameter of the first base surface 11 when the sealing body 10 is provided with the peripheral portion 50, in order to create a radial pressure when the peripheral portion 50 is arranged and fixed to the wall portion W2 around the opening O to be sealed, with the sealing body 10 extending in the opening O. For example, a height of the peripheral portion 50 may be comprised between 3 mm and 7 mm. For example, a height of the wall portion W2 around the opening O may be comprised between 1 mm and 5 mm. The height of the wall portion W2 is chosen smaller than the height of the peripheral portion 50, in order to create an axial pressure when the peripheral portion 50 is arranged and fixed to the wall portion W2. It should be noted that the above-mentioned dimensions of the gasket 100 are only illustrative, and may vary depending on the application. In the embodiment of Figure 2C, the first base surface 11 is provided with a surface roughness configured to limit liquid flow on the first base surface 11. The first base surface 11 is provided with a plurality of ridges 70. Said plurality of ridges 70 may be a plurality of parallel straight ridges 70 covering the whole surface areca of the first base surface 11, as illustrated in the embodiment of Figure 2C. In other embodiments, said plurality of ridges 70 may be a plurality of concentric ridges 70, or one or more spiral-shaped ridges 70, covering the whole surface area of the first base surface 11. In yet other embodiments, the plurality of ridges 70 may not cover the whole surface area of the first base surface 11. In yet other embodiments, the first base surface 11 and/or the second base surface 12 may be provided with said surface roughness. In such embodiments, the first base surface 11 and/or the second base surface 12 may be provided with a plurality of ridges

70. The spaces between two adjacent ridges 70 may define channels configured for evacuating water from the through-hole 20 towards the side surface 13 of the sealing body 10, and for preventing water from penetrating the through-hole 20 and the cut 30, thereby ensuring water tightness of the gasket 100.

A material of the gasket 100 may comprise rubber. Preferably, a Shore hardness of said material may be comprised between 40 and 60, preferably between 50 and 60. The material of said gasket may comprise different types of rubber offering the above-mentioned range of Shore hardness, such as silicone, ethylene propylene diene monomer (EPDM) rubber, nitrile butadiene rubber (NBR), and the like. Materials with Shore hardness between 40 and 60, preferably between 50 and 60, are suitable for the manufacture of a gasket that ensures sufficient resistance to indentation when pressure is exerted. Indeed, as explained above, when fitting the gasket 100 in the opening O to be sealed, the gasket 100 will be compressed and undergo a radial pressure as well as an axial IO pressure. Figure 3 illustrates a schematic perspective view of another exemplary embodiment of a gasket. As illustrated in Figure 3, the through-hole 20 has an axial direction parallel to the axial direction of the sealing body 10. The axis corresponding to the axial direction of the through-hole 20 coincides with the axis corresponding to the axial direction of the sealing body 10. The sealing body 10 comprises a cut 30 extending between the through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that a tube-like element can be inserted via the cut 30 in the through-hole 20. The cut 30 comprises a first cut path 31 on the first base surface 11 between the through-hole 20 and the side surface 13, and a second cut path 32 on the second base surface 12, between the through-hole 20 and the side surface 13. The first cut path 31 and the second cut path 32 correspond substantially to a straight line. In contrast to the embodiments of Figures 1A-1B and Figures 2A-2C, in the embodiment of Figure 3 the cut 30 follows a curved surface from the first cut path 31 to the second cut path 32. The cut 30 is formed with a helical shape comprising the first cut path 31 and the second cut path 32.

Figures 4A-4C respectively illustrate a schematic perspective view of three other exemplary embodiments of a gasket.

As illustrated in Figure 4A, the through-hole 20 has an axial direction parallel to the axial direction of the sealing body 10. The axis corresponding to the axial direction of the through-hole 20 does not coincide with the axis corresponding to the axial direction of the sealing body 10. The sealing body 10 comprises a cut 30 extending between the through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that a tube-like element can be inserted via the cut 30 in the through-hole 20. The cut 30 comprises a first cut path 31 on the first base surface 11 between the through-hole 20 and the side surface 13, and two second cut paths

32 on the second base surface 12, between the through-hole 20 and the side surface 13. The two second cut paths 32 are at a non-zero angle with respect to each other. The first cut path 31 and the two second cut paths 32 correspond substantially to a straight line. In contrast to the embodiments of Figures 1A-3, in the embodiment of Figure 4A the cut 30 follows a discontinuous flat surface between the through-hole 20 and the side surface 13. As illustrated in Figure 4B. the through-hole 20 has an axial direction non-parallel to the axial direction of the sealing body 10, in contrast to the embodiments of Figures 1A-4A. The sealing body 10 comprises a cut 30 extending between the through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that a tube-like element can be inserted via the cut 30 in the through-hole 20. The cut 30 comprises a first cut path 31 on the first base surface 11 between the through-hole 20 and the side surface 13, and a second cut path 32 on the second base surface 12, between the through-hole 20 and the side surface 13. The first cut path 31 and the second cut path 32 correspond substantially to a straight line. In contrast to the embodiments of Figures 1A-4A, in the embodiment of Figure 4B the cut 30 follows a continuous flat surface between the through-hole 20 and the side surface 13. Since in the embodiment of Figure 4B the first cut path 31 is parallel to the second cut path 32, the cut 30 is such that, projected onto a plane P perpendicular to the axial direction A of the sealing body 10, an angle between the first cut path 31 and the second cut path 32 is zero.

As illustrated in Figure 4C, the sealing body 10 is provided with a first through-hole 20 and a second through-hole 20°. In other embodiments, the sealing body 10 may be provided with more than two through-holes 20, 20°. The first and second through-holes 20, 20° have an axial direction non-parallel to the axial direction of the sealing body 10, as in the embodiment of Figure 4B. Accordingly, the sealing body 10 comprises a first cut 30 and a second cut 30°. The first cut 30 extends between the first through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that a first tube-like element can be inserted via the first cut 30 in the first through-hole 20. The second cut’ 30 extends between the second through-hole 20’ and the side surface 13 and between the first base surface 11 and the second base surface 12, such that a second tube-like element can be inserted via the second cut 30° in the second through- hole 20’. The first cut 30 comprises a first cut path 31 on the first base surface 11 between the first through-hole 20 and the side surface 13, and a second cut path 32 on the second base surface 12, between the first through-hole 20 and the side surface 13. The second cut 30’ comprises a first cut path 31° on the first base surface 11 between the second through-hole 20" and the side surface 13, and a second cut path 32° on the second base surface 12, between the second through-hole 20° and the side surface 13. The first cut paths 31, 31° and the second cut paths 32, 32" may correspondsubstantially to a straight line. The first cut path 31 may be parallel to the second cut path 32, and the first cut path 31’ may be parallel to the second cut path 32°. As in the embodiment of Figure 4A, in the embodiment of Figure 4B the first and second cuts 30, 30° may follow a continuous flat surface between the through-hole 20 and the side surface 13. Since in the embodiment of Figure 4C the first cut path 31 is parallel to the second cut path 32 and the first cut path 31° is parallel to the second cut path 32’, the first and second cuts 30, 30° are such that, projected onto a plane P perpendicular to the axial direction of the sealing body 10, an angle between the first cut path 31 and the second cut path 32 is zero, and an angle between the first cut path 31’ and the second cut path 32° is zero.

Figure 5 illustrates a perspective view of another exemplary embodiment of a gasket. The gasket 100 of Figure 5 may be the same as the gasket 100 described in connection with Figure 1A. Alternatively, the gasket 100 of Figure 5 may be the same as the gasket 100 described in any one of Figures 3-4C.

In the embodiment of Figure 5, the sealing body 10 may comprise a main cylindrical portion having an axial direction. The side surface may comprise a corresponding main cylindrical surface intended to be in sealing contact with a wall WI of an opening O in which the gasket 100 is fitted. In contrast to the embodiment of Figures 2A-2C, in the embodiment of Figure 5 the gasket 100 is not provided with an outwardly protruding peripheral portion. Instead, a separate element 200 may be configured to be arranged and fixed to a wall portion W2 around the opening O to be sealed, with the sealing body extending in the opening O. In other embodiments, both an outwardly protruding peripheral portion and a separate element may be provided to a gasket. The separate element 200 may be fixed to the wall portion W2 by means of fastening elements (not shown) such as screws and the like. Said fastening elements may extend through a plurality of slits arranged in the separate element 200, and may be arranged in a plurality of corresponding holes in the wall portion W2. In the embodiment of Figure 5, three slits are present in the separate element 200, as well as three corresponding holes in the wall portion W2. In other embodiments, more or less than three slits and corresponding holes may be present, but at least two slits and corresponding holes may be present. Figure 6 illustrates a schematic top view of another exemplary embodiment of a gasket. As illustrated in Figure 6, the sealing body 10 is provided with a first through-hole 20, a second through-hole 20’, and a third through-hole 20°’. The first, second, and third through-holes 20, 20°, 20°’ have a corresponding axial direction At, At, At” parallel to the axial direction A of thesealing body 10, as in the embodiments of Figures 1A-4A. In the embodiment of Figure 6, the axes corresponding to said axial directions At, At, Af’ do not coincide with the axis corresponding to the axial direction A of the sealing body 10. Accordingly, the sealing body 10 comprises a first cut 30, a second cut 30, and a third cut 30°’. Each cut 30, 30°, 30°’ is such that, projected onto a plane P perpendicular to the axial direction A of the sealing body 10, it defines a closed line whose surface area covers at least 2% of a surface area of the first base surface 11. Preferably, the sum of said surface areas covers at least 10% of the surface area of the first base surface 11, more preferably at least 20% of the surface area of the first base surface 11. Each cut 30, 30°, 307 comprises a corresponding first cut path 31, 31°, 31°’ on the first base surface 11 between the corresponding through-hole 20, 20’, 207’ and the side surface 13, and a corresponding second cut path 32, 32°, 32” on the second base surface 12, between the corresponding through-hole 20, 20°, 20°’ and the side surface 13. The cuts 30, 30°, 30°" are such that, projected onto said plane P, the first cut path 31 is at an angle a with respect to the second cut path 32, said angle a being larger than 5°, the first cut path 31° is at an angle o’ with respect to the second cut path 32’, said angle o’ being larger than 5°, and the first cut path 317 is at an angle a’ with respect to the second cut path 327, said angle o’’ being larger than 5°. The angles ¢, o’, and o”’ may be the same, or may be different. Preferably, said angles a, o’, and o’’ are larger than 10°, more preferably larger than 20°. The first cut paths 31, 31°, 31°’ and/or the second cut paths 32, 32°, 32°’ may correspond substantially to a straight line, as illustrated in the embodiment of Figure 6.

Figures 7A-7D respectively illustrate a side view, a perspective view, another side view, and another perspective view of another exemplary embodiment of a gasket. As illustrated in Figures 7A and 7D, the sealing body 10 comprises a main cylindrical portion 40 intended to be in sealing contact with a wall (not shown) of an opening (not shown) in which the gasket 100 is fitted. The sealing body 10 is provided with an outwardly protruding peripheral portion 50 configured to be arranged and fixed to a wall portion (not shown) around the opening to be sealed, with the sealing body 10 extending in the opening. The peripheral portion 50 may be fixed to the wall portion by means of fastening elements (not shown) such as screws and the like. Said fastening elements may extend through a plurality of slits 51 arranged in the first base surface 11, and may be arranged in a plurality of corresponding holes in the wall portion. Alternatively, the outwardly protruding peripheral portion 50 may be fixed to the wall portion by means of a separate element 200, as described in Figure 5. As in the embodiment of Figure 2C, the first base surface 11 is provided with a surface roughness configured to limit liquid flow on the first base surface 11. The first base surface 11 is provided with a plurality of ridges 70. A material of the gasket 100 maycomprise rubber. Preferably, a Shore hardness of said material may be comprised between 40 and 60, preferably between 50 and 60. As illustrated in Figures 7B and 7C, the sealing body 10 comprises a cut 30 extending between the through-hole 20 and the side surface 13 and between the first base surface 11 and the second base surface 12, such that a tube-like element can be inserted via the cut 30 in the through-hole 20. The sealing body 10 has an axial direction A, and the through-hole 20 has an axial direction At parallel to the axial direction A of the sealing body 10. The axis corresponding to the axial direction At of the through-hole 20 coincides with the axis corresponding to the axial direction A of the sealing body 10. The cut 30 comprises a first cut path 31 on the first base surface 11 between the through- hole 20 and the side surface 13, and a second cut path 32 on the second base surface 12, between the through-hole 20 and the side surface 13. The first cut path 31 and the second cut path 32 correspond substantially to a straight line. The cut 30 follows a discontinuous surface from said first cut path 31 to said second cut path 32. The cut 30 comprises a first cut portion 61 comprising the first cut path 31, a second cut portion 62 comprising the second cut path 32, and a third cut portion 63 connecting the first cut portion 61 and the second cut portion 62. The first cut portion 61 and the second cut portion 62 are flat portions. The third cut portion 63 comprises four flat portions 63a, 63b, 63c, 63d extending in a plane perpendicular to the axial direction At of the through-hole

20. The flat portions 63a and 63b are connected by a flat portion 63e extending in a plane parallel to the axial direction At of the through-hole 20. Similarly, the flat portions 63b and 63c are connected by a flat portion 63g extending in said plane, and the flat portions 63c and 63d are connected by a flat portion 63f extending in said plane. Figure 8 illustrates a perspective view of two gaskets in a fixture provided with a camera bracket.

As illustrated in Figure 8, the gasket 100 of Figures 1A-7D may be used in other fixtures than in luminaires, for example in a fixture including a pole Po, and wherein a camera bracket Br is provided, said camera bracket comprising a camera Ca. It should be clear that the gasket 100 of Figures 1A-7D may also be used in a luminaire provided with a pole Po and a camera bracket Br with a camera Ca. In the embodiment of Figure 8, two gaskets 100, 100° are provided at two different locations. The first gasket 100 is provided between the pole Po and an end of the camera bracket Br opposite the camera Ca. The through-hole 20, second cut path 32, and second base surface 12 of the first gasket 100 are visible in Figure 8. The second gasket 100’ is provided within the camera bracket Br, at an interface between an inner chamber of the camera bracket Br and the camera Ca. The through-hole

20’, first cut path 31, and first base surface 11 of the second gasket 100° are visible in Figure 8, as well as a plurality of ridges 70 provided to the first base surface 11. Whilst the principles of the invention have been set out above in connection with specific embodiments, it is to be understood that this description is merely made by way of example and not as a limitation of the scope of protection which is determined by the appended claims.

Claims

Conclusions

A gasket (100) for a tubular element such as a cable (C), the gasket (100) comprising a sealing body (10) having a through hole (20) for the tubular element; wherein the sealing body (10) has a first base surface (11), a second base surface (12) opposite the first base surface (11) and a side surface (13) connecting the first base surface (11) and the second base surface (12), wherein the through hole (20) extends between the first base surface (11) and the second base surface (12); wherein the sealing body (10) includes a notch (30) extending between the IO through hole (20) and the side surface (13) and between the first base surface (11) and the second base surface (12) such that the tubular element insertable through the cut (30) into the through hole (20); wherein the sealing body (10) has an axial direction (A), and wherein the cut (30) is such that, projected on a plane (P) perpendicular to the axial direction (A), it defines a closed line whose surface area is covers at least 2% of a surface area of the first base surface (11).

The gasket of claim 1, wherein the sealing body (10) comprises a cylindrical main portion (40) having the axial direction (A); wherein the side surface {13) comprises a corresponding cylindrical major surface (43) intended to be in sealing contact with a wall (WI) of an opening (O) in which the gasket (100) is disposed.

The gasket of claim 1, wherein the sealing body (10) comprises a conical main portion having the axial direction (A); wherein the side surface (13) includes a corresponding conical major surface intended to be in sealing contact with a wall (W1) of an opening (O) in which the gasket (100) is disposed; wherein a surface area of the first base surface (11) is greater than a surface area of the second base surface (12).

Gasket according to any one of the preceding claims, wherein the sealing body (10) has an outwardly projecting edge portion (50) adapted to be fitted and attached to a wall portion (W2) around an opening (O) to be sealed. wherein the sealing body (10) extends into the opening (O).

Gasket according to one of the preceding claims, wherein the first base surface (11) and / or the second base surface (12) is / are substantially perpendicular to the axial direction (A).

Gasket according to any of the preceding claims, wherein the through hole (20) has an axial direction (At) at an angle different from zero to the axial direction (A) of the sealing body (10).

Gasket according to any one of claims 1 to 5, wherein the through hole (20) has an axial direction (At) parallel to the axial direction (A) of the sealing body (10).

The gasket of any preceding claim, wherein the cut (30) has at least one first cut path (31) on the first base surface (11) between the through hole (20) and the side surface (13), and a second cut path ( 32) on the second base surface (12), between the through hole (20) and the side surface (13).

The gasket of claim 8, wherein the first cut path (31) and / or the second cut path (32) substantially corresponds to a straight line.

The gasket of claim 8 or 9, wherein the cut (30) forms a discontinuous or curved surface from the first cut path (31) to the second cut path (32).

The gasket of claim 10, wherein the cut (30), projected on a plane (P) perpendicular to the axial direction (A) of the sealing body (10), is such that the first cut path (31) is at an angle α at to the second cut path (32), the angle α being greater than 5 °.

The gasket of any of claims 8-11, wherein the cut (30) comprises: a first cut portion (61) comprising the first cut path (31), the first cut portion (61) having a first height (h1) in an axial has direction (At) of the through hole (20) that is Less than the height (h) of the through hole (20) as viewed in the axial direction (At); a second cut portion (62) including the second cut path (32), the second cut portion (62) having a second height (h2) in the axial direction (Δt) that is less than the height (h) of the through hole (20 ) as viewed in the axial direction (At); and a third cut portion (63) connecting the first cut portion (61) and the second cut portion (62).

The gasket of claim 12, wherein the first cut portion (61) and the second cut portion (62) are flat portions.

The gasket of claim 12 or 13, wherein the third cut portion (63) includes at least one planar portion (63a, 63b, 63c, 63d) extending in a plane perpendicular to the axial direction (At) of the through hole (At). 20).

Gasket according to any of the claims 12-14, wherein the sum of the first height (ht) of the first cut portion (61) and the second height (h2) of the second cut portion (62) substantially corresponds to the height (h ) from the through hole (20).

The gasket of any preceding claim, wherein the cut (30) comprises a spiral portion.

The gasket of claim 6, wherein the cut (30) follows a flat surface between the through hole (20) and the side surface (13).

Gasket according to any one of the preceding claims, wherein the first base surface (11) and / or the second base surface (12) is provided with a surface roughness adapted to prevent a fluid flow on the first base surface (11) and / or on the second base area (12).

Gasket according to any of the preceding claims, wherein the first base surface (11) and / or the second base surface (12) is provided with a plurality of combs (70).

The gasket of any preceding claim, wherein a material of the gasket (100) includes rubber; wherein preferably a Shore hardness of the material is between 40 and 60, preferably between 50 and 60.