• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an electrical box (1) to be engaged through an opening in a wall, comprising: - a rear body (10) which comprises a lateral wall (11) of rigid material centered on a central axis (A1 ), and at least one detent tab (20) which is movable between a retracted position and an extended position in which it protrudes from said side wall, and - a front flange (50) including a shoulder (51) ) rigid material that extends outwardly, projecting from said side wall. According to the invention, the rear body and the front flange are disjoint and are connected together by a peripheral belt (80) of flexible material, which is elastically deformable along the central axis.
    公开号:FR3042918A1
    申请号:FR1560039
    申请日:2015-10-21
    公开日:2017-04-28
    发明作者:Laurent Janicot；Stephane Cazillac；Simon Delmas；Philippe Buisson；David Noailhac
    申请人:Legrand SA；
    IPC主号:
    专利说明:

    Technical field to which the invention relates
    The present invention generally relates to the embedding of electrical equipment in hollow partitions.
    It relates more particularly to an electrical box to engage through an opening in a wall, comprising: - a rear body which has a side wall of rigid material centered on a central axis, and at least one locking lug adapted to cling to the wall, and - a front flange comprising a shoulder of rigid material extending outwardly, projecting from said side wall.
    Technological background
    Recall that, in general, a hollow partition has a frame of metal or wood, on which are reported gypsum board.
    An electrical box to engage through an opening in such a gypsum board generally comprises a cylindrical side wall, closed at the rear by a bottom and lined at the front by a peripheral sidewalk, which is adapted to press against the front of the plasterboard.
    It also has attachment means at the back of the plasterboard which, combined with the peripheral sidewalk, are designed to pinch the edge of the opening of the plasterboard.
    These fixing means may for example be in the form of claws which intervene in diametrically opposite position and which, under the control of screws, are able to hang on the back of the plasterboard. The advantage of this technical solution is that it allows to fix the electrical box in gypsum panels of varying thicknesses. The disadvantage is that its installation is tedious, especially when it comes to manipulating the screws to raise the claws along the side wall of the electrical box until they cling to the panel of plaster, while keeping the electrical box in the desired orientation.
    Electric boxes are also known, the fixing means of which are formed by snap-fastening tabs adapted to hang on the back of the plaster boards. These electrical boxes are easier to install in plasterboards, since it is enough to engage them so that they are automatically clipped onto the plasterboard. Unfortunately, such electrical boxes can only be used on plasterboards whose thicknesses are equal to the distance between the snap-fastening tabs of the peripheral sidewalk of the box.
    Object of the invention
    Here, the present invention proposes a new electrical box capable of being clipped into plasterboard of varying thicknesses.
    More particularly, the invention proposes an electrical box as defined in the introduction, wherein the rear body and the front flange are disjoint and are connected together by a peripheral belt of flexible material, which is elastically deformable according to the invention. central axis.
    In this way, by stretching the belt along the central axis, it is possible to adjust the distance separating the front flange of the latching lugs, so that the latter can snap to the rear of the wall, which whatever the thickness of it. The advantage of using a peripheral belt of flexible material is that the maintenance of the electric box in position in the wall is optimized, in that the snap lugs and the front flange then firmly sandwich the edge of the opening of the wall, thanks to the elasticity of the peripheral belt.
    Another advantage can be obtained by using a closed peripheral belt (that is to say devoid of opening). Such a belt makes it possible to ensure the tightness of the electrical box, in accordance with BBC standards ("building low consumption"). Other advantageous and non-limiting characteristics of the electrical box according to the invention are the following: the peripheral belt is elastically deformable along the central axis, in tension, with an amplitude at least equal to 13 millimeters, preferably greater or equal to 15 millimeters; - The peripheral belt is elastically deformable along the central axis, in compression, with an amplitude at least equal to 3 millimeters, preferably greater than or equal to 5 millimeters; each detent tab is movable between an extended position in which it extends projecting from said side wall and a position retracted towards the central axis; - Each latching lug being biased resiliently in the deployed position, each latching lug carries a maneuvering portion accessible to a user for placing said latching lug in the retracted position; said operating part has a slot for insertion of the tip of a tool; - Each latching lug carries a screwing well which is adapted to receive the threaded rod of a fastening screw of an apparatus mechanism and which forms said operating part; - there is provided, in front of said latching lug, a hook defining an opening which is located in the axis of said screwing well for receiving the threaded rod of the screw and which is open towards the central axis for allow the screw to escape from this hook; - Each latching lug is located in an opening in the side wall and is connected to the edge of the opening, at least in part, by a seal of flexible material; - Each latching lug carries on its outer face a ramp for forcing said latching lug to move to its retracted position in favor of the depression of the electrical box in said opening; - Each latching lug has a front flange turned towards said shoulder, which carries a means of securing a cal le; and the rear body has at least one opening for the passage of an electrical conductor, which is closed off by a cover made of flexible material.
    Detailed description of an example of realization
    The following description with reference to the accompanying drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be achieved.
    In the accompanying drawings: - Figure 1 is a schematic perspective view of an electrical box according to the invention; - Figures 2 to 4 are schematic sectional views of the electrical box of Figure 1, illustrating three steps of mounting this electrical box in a wall; and FIG. 5 is a diagrammatic perspective view of the electrical box of FIG. 1 and of a portion of the switchgear mechanism that it receives.
    In Figures 1 to 5, there is shown a particular embodiment of an electrical box 1 to report on a wall.
    As a preliminary, it will be noted that in FIG. 1, the parts represented in white are parts of the electrical box 1 made of a rigid material, such as polypropylene or ABS ("acrylonitrile butadiene styrene"), and the shaded parts are parts made of a substantially more flexible material, such as SEBS ("polystyrene-b-poly (ethylene-butylene) -b-polystyrene"). By "substantially more flexible" is meant that the Young's modulus of the shaded parts is at least five times smaller than that of the blank parts. In practice, unlike the blank parts, the shaded parts may be made of viscoelastic material.
    In this case, this electrical box 1 is of the type to be embedded in a cavity made in a wall. This wall is here formed by a hollow partition.
    It is recalled in this regard that, in known manner, such a hollow partition is generally composed of a metal frame (formed of vertical uprights and horizontal rails not shown) and gypsum panels reported on at least one of the two faces of the metal frame.
    Alternatively, it could be a hollow partition masonry.
    Here, the cavity made in the hollow partition to accommodate the electrical box 1 is simply formed by an opening 101 made with a hole saw in one of the plaster boards 100 (see for example Figure 5).
    In the description, the terms "front" and "back" will be used relative to the direction of the gaze of the installer of the electrical box 1 in the plasterboard 100. Thus, the terms forward and back respectively designate the place turned towards the outside of the hollow partition and the place turned to the opposite.
    Here, as shown in Figure 1, the electrical box 1 has a generally cylindrical shape of revolution about a central axis A1, so as to receive an electrical equipment 200 (see Figure 5). Alternatively, it could have a different shape, in particular parallelepipedal or oblong (so as to delimit several reception positions of electrical equipment).
    As shown in FIG. 1, this electrical box 1 comprises a rear body 10 and a front flange 50.
    The rear body 10 has a side wall 11 of rigid material which is centered on the central axis A1, which is closed at the rear by a bottom wall 12 and which is open towards the front.
    The front flange 50 comprises a tubular portion 52, of a diameter equal to that of the side wall 11 of the rear body 10, and a shoulder 51 of rigid material which is bent outwards, projecting with respect to the tubular 52.
    This shoulder 51 forms here a peripheral sidewalk, since it runs externally all of the front edge of the tubular portion 52. It is thus designed to bear against the front face of the plasterboard 100, around the opening 101. Alternatively, it could have a different shape. This could possibly be interrupted by notches.
    Whatever its shape, this shoulder 51 can block the electrical box 1 relative to the gypsum board 100 to the rear.
    To block the electrical box 1 forward, the rear body 10 has two latching tabs 20 adapted to hook to the rear face of the plasterboard 100.
    These two detent tabs 20 are located diametrically opposite to the central axis A1. They are each movable between an extended position (FIG. 2) in which they extend at least partly projecting outside said lateral wall 11, and a position retracted towards the central axis A1 with respect to the deployed position. (Figure 3).
    These latching lugs 20 will be described in more detail later in this presentation.
    The electrical box 1 further comprises means for securing an electrical equipment. As shown in Figure 1, it is here screwed screwing wells internally 30, can screw screws for fixing a support of electrical equipment. Alternatively, it could be screwing wells for self-tapping screws.
    Here, this electrical box 1 is designed to be mounted on plasterboards 100 of different thicknesses.
    For this, according to a particularly advantageous feature of the invention, the rear body 10 and the front flange 50 of the electrical box 1 are disjoint and are connected together by a peripheral belt 80 of flexible material, which is elastically deformable along the axis central A1.
    This peripheral belt 80 is here cylindrical of revolution around the central axis A1. In the unconstrained state, it has an inside diameter, an outside diameter and a thickness respectively equal to the inside diameter, the outside diameter and the thickness of the side wall 11 of the rear body 10. It extends between the edge rear of the tubular portion 52 of the front flange 50 and the front edge of the side wall 11 of the rear body 10.
    Alternatively, it could have a different shape, for example with a variable thickness along its height.
    This peripheral belt 80 is elastically deformable along the central axis A1.
    Here, and preferably, it is elastically deformable both in traction (to be stretched), in compression (to be crushed).
    It is thus stretchable from its rest position (unstressed) to a maximum elastic stretching position, with an amplitude greater than or equal to 13 millimeters (and here at least equal to 15 millimeters).
    It is further compressible from its rest position to a maximum crushing position, with an amplitude greater than or equal to 3 millimeters (and here at least equal to 5 millimeters).
    Here, the rest position is such that, when the peripheral belt 80 is not constrained, the shoulder 51 and the latching lugs 20 of the electrical box are distant by a distance L1 equal to 13 millimeters, which allows to bring the electrical box on a plasterboard 13 millimeters thick (see Figure 2).
    Of course, this rest position could be chosen differently (for example such that the distance L1 is less than 13 mm or greater than 13 mm).
    Here, when the peripheral belt 80 is stretched with an amplitude of 13 millimeters relative to the rest position, the shoulder 51 and the latching lugs 20 of the electrical box are spaced apart by a distance L2 equal to 26 millimeters, This makes it possible to bring the electrical box back to a plaster board 26 millimeters thick (see Figure 4).
    When the gypsum board has a thickness of less than 13 millimeters, for example equal to 10 millimeters, the screwing of an equipment mechanism in the screwing wells 30 will compress the peripheral belt 80, so that it does not does not oppose the fixing of the box in the partition.
    It is thus understood that it becomes possible to mount the electrical box 1 on a wide variety of walls, with great ease since this assembly is to snap the electrical box on the wall.
    We can now describe in more detail the two latching lugs 20.
    These two latching lugs 20 are identical.
    As shown in Figure 1, each latching lug 20 is located in an opening 13 in the side wall 11 of the rear body 10.
    It comprises a flexion blade 21 which, at rest, extends in the extension of the side wall 11 of the rear body 10 and which carries, on the side of its front end, a hooking flange 22 projecting outwards .
    Each bending blade 21 has an elongated shape parallel to the central axis A1, with three free edges and a rear edge which connects to the side wall 11 of the rear body 10 by a rigid portion, to form a kind of hinge.
    The three free edges are connected to the edge of the opening 13 by a seal 14 of flexible material, which ensures the tightness of the electrical box around each latching lug 20. This seal 14 is here stretchable and elastically deformable so as not to hinder the tilting of the detent tab 20 between its deployed and retracted positions.
    The hooking flange 22 extends substantially at right angles to the flexural blade 21 (within 5 degrees), in front of it. It thus has a front face parallel to the rear face of the shoulder 51, which allows it to be applied against the rear face of the plasterboard 100 when the shoulder is pressed against the front face thereof.
    At rest, while the latching lug 20 is in the extended position, the hooking flange 22 projects outside the side wall 11 of the rear body 10. In the retracted position, it is entirely located inside. of the side wall 11 of the rear body 10, so as not to hinder the engagement of the rear body 10 through the opening 101 formed in the gypsum board 100.
    As shown in Figures 1 and 2, the latching lug 20 carries, between the rear face of its hooking flange 22 and the outer face of its flexion blade 21, substantially triangular ribs 23 which not only allow to stiffen all, but which also form ramps 23 for forcing the latching lug 20 to move to its retracted position in favor of the depression of the electric box 1 in the opening 101.
    Here, each latching lug 20 is biased resiliently in the deployed position by the gasket 14 and its hinge which connects it to the rest of the rear body 10. Thus, once the electric box 1 is installed in the plasterboard 100, an effort traction exerted on it does not allow the out of the opening 101.
    To allow the extraction of the electrical box 1 out of the opening 101, each latching lug 20 then carries a maneuvering part which is accessible to a user, so as to allow the latter to force the latching lug 20 to switch to the retracted position.
    It would thus be possible for the inside face of the flexion blade of each detent lug to bear a lug in which a slot would be provided, so that the user could engage the tip of a tool in such a way as to force the lug latching mechanism.
    Here, this function is provided by the screw wells 30, which are recalled that they are designed to receive the threaded rod of a screw 40 for fixing an electrical equipment.
    For this, as shown in Figure 1, each screwing well 30 is fixed exclusively to the inner face of the flexural blade 21 of the corresponding latching lug 20, so as not to hinder the tilting thereof.
    It is understood that when the screwing well 30 receives a screw 40, the user can use the latter in the manner of a lever to force the latching lug 20 to tilt in the retracted position (see Figure 3).
    In order to indicate the positioning of the latching lug and to maintain the latching lug in the deployed position, a hook 31 is provided here.
    As shown in FIG. 1, when the detent tab 20 is in the deployed position, this hook 31 extends forward and in the axis of the screwing well 30.
    This hook 31 has two tabs which delimit between them an opening of diameter equal, clearance, to that of the screw 40 (and that of the threaded bore provided in the screwing well 30), so as to ensure a good maintaining the screw 40. This opening is open towards the central axis A1 to allow the screw 40 to escape laterally from the hook 31 when the user wishes to unclip it from the hook 31.
    Alternatively, the hook could have only one leg.
    Here, this hook 31 of rigid material is located projecting from the inner face of the side wall 11 of the rear body 10. Alternatively, it could be located otherwise, for example projecting from the front flange 50.
    It is also observed in FIG. 1 that, in order to make electrical conductors for supplying electricity to the interior of the electrical box 1, the rear body 10 has at least one through opening 15.
    Here, four passage openings 15 are provided, each extending along the side wall 11 and on the bottom wall 12 of the rear body 10 of the electrical box 1.
    These passage openings 15 are initially closed by covers 16 of flexible material, which are pierceable or manually removable to allow the passage and the maintenance of the end of a tracking sheath inside which run electrical son.
    Here, the electrical box 1 is manufactured in two successive operations, including a molding operation of the rigid parts (in white in Figure 1), followed by an overmoulding operation of the flexible parts (greyed in Figure 1). The film 14, the peripheral belt 80 and the covers 16 are thus formed in one piece, in the same material.
    FIGS. 2 to 4 show in section the steps of placing the electrical box 1 through the opening 101 made in the gypsum board 100.
    Initially, as shown in Figure 2, the detent tabs are in the deployed position and the peripheral belt 80 is not stretched.
    Then, when the installer forces the electrical box 1 to engage through the opening 101, the ramps 23 of the latching lugs 20 bear against the edge of the opening 101, which forces the legs of latching 20 to switch to the retracted position (see Figure 3).
    Here, it may be noted that if the effort to be exerted axially on the electrical box 1 to get it into the opening 101 is too important, the installer can lever with the screws 40 to force the latching lugs 20 to switch to the retracted position so that it does not interfere with the insertion of the electrical box 1 in the opening 101. Generally, when the shoulder 51 of the front flange 50 bears against the front face of the panel plaster 100, the latching tabs 20 are still located in the opening 101, so that they can not be deployed at the back of the plasterboard 100. The installer can then force the peripheral belt 80 to stretch axially, either by pushing on the wall of the bottom 12 of the rear body 10, or by pushing the screws 40 towards the rear. As soon as the latching tabs 20 extend beyond the rear edge of the opening 101, they will then naturally extend to the rear of the plasterboard 100.
    As shown in Figure 4, the installer can then ensure the reliability of the assembly by clipping the screws 40 in the hooks 31 (which will only be possible if the electrical box 1 is fully engaged in the drywall 100 and if the latching lugs 20 are located at the rear of this gypsum board 100).
    Once the electrical box 1 in place, the installer can bring back the electrical equipment 200. The support 210 and the base 230 of this electrical equipment 200 are here shown in exploded view in Figure 5. They have conventional shapes and will not be described in detail.
    It will be observed only in this figure that the support 210, which serves to mount the base 230 inside the electrical box 1, is in the form of a square flat frame whose inner edge is designed to receive, snap-fastening , the base 230 and whose four branches have a keyhole-shaped hole adapted to allow its attachment to the electrical box 1, by means of the screws 40.
    When the user wishes to remove the electrical box 1 of the gypsum board 100, he must remove the electrical equipment 200 by partially unscrewing the screws 40, then he can force the screws 40 to exit laterally from the hooks 31, so as to tilting the latching lugs 20 in the retracted position. Then, as soon as the latching tabs 20 have tilted, the peripheral belt 80 will resume its initial shape (not stretched), which will allow the latching tabs 20 to be retained in the retracted position by the edge of the opening 101. The user can then easily extract the electrical box 1 out of the opening 101.
    The present invention is not limited to the embodiment described and shown, but the skilled person will be able to make any possible variant.
    Thus, it could have been provided that the screw wells are carried, not by the latching lugs, but by the side wall of the rear body of the electrical box.
    It could also have been provided that the securing means of the electrical equipment are not in the form of screwing wells, but rather in the form of windows provided in recess in the internal face of the side wall of the rear body of the electric box. These windows then allow to fix the equipment support in the rear body of the electrical box, snap.
    According to another variant of the invention not shown in the figures, it could have been provided that the hooking flange of each latching lug has a means of securing a caliper. By way of example, the front face of this hooking flange could have a hollow dovetail groove, to fix the calle. This calle forming an extra thickness, it can then allow to fix the electrical box on gypsum panels of low thicknesses. It may also make it possible to force the peripheral belt to extend further axially, so as to increase the internal volume of the electrical box 1 (which will bring large electrical equipment).
    According to another variant of the invention, it could have been provided that the peripheral belt is partially open. Indeed, the peripheral belt being located in the thickness of the plaster wall, the openings provided in the peripheral belt do not open outwardly so that they would not affect the tightness of the box.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Electrical box (1) to engage through an opening (101) formed in a wall (100), comprising: - a rear body (10) which comprises a lateral wall (11) of rigid material centered on an axis central (A1), and at least one latching lug (20) adapted to engage the wall (100), and - a front flange (50) comprising a shoulder (51) of rigid material extending towards the outside, projecting from said side wall (11), characterized in that the rear body (10) and the front flange (50) are disjoint and are connected together by a peripheral belt (80) of flexible material, which is elastically deformable along the central axis (A1).
    [2" id="c-fr-0002]
    2. Electrical box (1) according to the preceding claim, wherein the peripheral belt (80) is elastically deformable along the central axis (A1), in tension, with an amplitude at least equal to 13 millimeters, preferably greater than or equal to 15 millimeters.
    [3" id="c-fr-0003]
    3. Electrical box (1) according to one of the preceding claims, wherein the peripheral belt (80) is elastically deformable along the central axis (A1), in compression, with an amplitude at least equal to 3 millimeters, preferably greater or equal to 5 millimeters.
    [4" id="c-fr-0004]
    4. Electrical box (1) according to one of the preceding claims, wherein each latching lug (20) is movable between an extended position in which it extends projecting from said side wall (11) and a retracted position. towards the central axis (A1).
    [5" id="c-fr-0005]
    5. Electrical box (1) according to the preceding claim, wherein, each latching lug (20) being elastically biased in the deployed position, each latching lug (20) carries a maneuvering part accessible to a user to place said latching lug (20) in the retracted position.
    [6" id="c-fr-0006]
    6. Electrical box according to claim 5, wherein each latching lug (20) carries a screwing well (30) which is adapted to receive the threaded rod of a screw (40) for fixing a mechanism apparatus and which forms said maneuvering part.
    [7" id="c-fr-0007]
    7. Electrical box (1) according to the preceding claim, wherein there is provided, in front of said latching lug (20), a hook (31) defining an opening which is located in the axis of said well. screwing (30) for receiving the threaded rod of the screw (40) and which is open towards the central axis (Ai) to allow the screw (40) to escape from this hook (31).
    [8" id="c-fr-0008]
    8. The electric box (1) according to claim 5, wherein said operating portion has a slot for insertion of the tip of a tool.
    [9" id="c-fr-0009]
    9. Electrical box (1) according to one of the preceding claims, wherein each latching lug (20) is located in an opening (13) formed in the side wall (11) and is connected to the edge of the opening (13), at least in part, by a seal (14) of flexible material.
    [10" id="c-fr-0010]
    10. Electrical box (1) according to one of the preceding claims, wherein each latching lug (20) carries on its outer face a ramp (23) for forcing said latching lug (20) to move towards its retracted position in favor of the depression of the electrical box (1) in said opening (101).
    [11" id="c-fr-0011]
    11. Electrical box according to one of the preceding claims, wherein each latching lug has a front flange facing said shoulder, which carries a means of securing a calle.
    [12" id="c-fr-0012]
    12. Electrical box (1) according to one of the preceding claims, wherein the rear body (10) has at least one opening (15) for passage of an electrical conductor, which is closed by a cover (16) of material flexible.
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    同族专利:
    公开号 | 公开日
    EP3159988B1|2018-06-27|
    RU2717572C2|2020-03-24|
    RU2016140563A3|2020-01-28|
    PT3159988T|2018-10-17|
    FR3042918B1|2017-12-22|
    ES2688269T3|2018-10-31|
    EP3159988A1|2017-04-26|
    RU2016140563A|2018-04-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    FR2859320A1|2003-09-03|2005-03-04|Legrand Sa|Electrical wiring junction box has telescopic base connected to sides by alternating rigid sections and flexible lugs to allow depth to be adjusted|
    EP1564859A1|2004-02-13|2005-08-17|Alombard SAS|Flanged housing for a thin wall|
    DE102011053486A1|2011-09-11|2013-03-14|Andreas Lück|Electrical installation box installed at cavity of wall, has retaining stop that is protruded from wall and is pressed on retaining edge of installation box|
    FR2806846B1|2000-03-24|2002-06-21|Legrand Sa|APPARATUS HOUSING AVAILABLE ALONG A CHUTE, ESPECIALLY FOR ELECTRIC APPARATUS|FR3062529B1|2017-01-31|2019-03-29|Legrand France|ELECTRICAL BOX INSERTED IN PARTITIONS OF DIFFERENT THICKNESSES|
    FR3076405B1|2017-12-29|2020-01-10|Legrand France|ELECTRICAL BOX WITH VARIABLE DEPTH|
    AT520425B8|2018-01-26|2019-05-15|Obo Bettermann Hungary Kft|As a hollow wall box running installation box|
    DE202018100433U1|2018-01-26|2019-04-30|Obo Bettermann Hungary Kft|As a hollow wall box running installation box|
    DE102019131367A1|2019-11-20|2021-05-20|Kaiser Gmbh & Co. Kg|Installation box|
    RU203543U1|2021-02-12|2021-04-12|Общество с ограниченной ответственностью "ЭЛЕКТРОРЕШЕНИЯ"|Electrical installation box|
    法律状态:
    2016-10-12| PLFP| Fee payment|Year of fee payment: 2 |
    2017-04-28| PLSC| Publication of the preliminary search report|Effective date: 20170428 |
    2017-10-03| PLFP| Fee payment|Year of fee payment: 3 |
    2018-10-30| PLFP| Fee payment|Year of fee payment: 4 |
    2020-10-16| ST| Notification of lapse|Effective date: 20200906 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1560039A|FR3042918B1|2015-10-21|2015-10-21|ELECTRICAL BOX INSERTED IN PARTITIONS OF DIFFERENT THICKNESSES|FR1560039A| FR3042918B1|2015-10-21|2015-10-21|ELECTRICAL BOX INSERTED IN PARTITIONS OF DIFFERENT THICKNESSES|
    PT16306168T| PT3159988T|2015-10-21|2016-09-14|Electrical box for installation in a wall having different thicknesses|
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