EP3263797B1 - A roof window and a sloping roof structure - Google Patents

A roof window and a sloping roof structure Download PDF

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Publication number
EP3263797B1
EP3263797B1 EP17178911.8A EP17178911A EP3263797B1 EP 3263797 B1 EP3263797 B1 EP 3263797B1 EP 17178911 A EP17178911 A EP 17178911A EP 3263797 B1 EP3263797 B1 EP 3263797B1
Authority
EP
European Patent Office
Prior art keywords
pane
exterior side
frame
sash
window
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17178911.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3263797A1 (en
Inventor
Per Jacobsen
Brent MØLLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VKR Holding AS
Original Assignee
VKR Holding AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VKR Holding AS filed Critical VKR Holding AS
Priority to PL17178911T priority Critical patent/PL3263797T3/pl
Publication of EP3263797A1 publication Critical patent/EP3263797A1/en
Application granted granted Critical
Publication of EP3263797B1 publication Critical patent/EP3263797B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/14—Junctions of roof sheathings to chimneys or other parts extending above the roof
    • E04D13/147—Junctions of roof sheathings to chimneys or other parts extending above the roof specially adapted for inclined roofs
    • E04D13/1473—Junctions of roof sheathings to chimneys or other parts extending above the roof specially adapted for inclined roofs specially adapted to the cross-section of the parts extending above the roof
    • E04D13/1475—Junctions of roof sheathings to chimneys or other parts extending above the roof specially adapted for inclined roofs specially adapted to the cross-section of the parts extending above the roof wherein the parts extending above the roof have a generally rectangular cross-section
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
    • E04D13/0305—Supports or connecting means for sky-lights of flat or domed shape
    • E04D13/031—Supports or connecting means for sky-lights of flat or domed shape characterised by a frame for connection to an inclined roof
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0481—Drainage guiding provisions, e.g. deflectors or stimulation by inclined surfaces

Definitions

  • the present invention relates to a roof window comprising a sash and a frame, said sash carrying a pane and being connected to the frame via hinges, and said frame being adapted for being connected to a load-bearing structure of a roof of a building, where each of the sash and the frame comprises two side members, a top member and a bottom member, where said frame members delimit a frame opening and said sash members delimit a sash opening, where each of the pane, the sash members and frame members has an interior side adapted for facing the interior of the building in the mounted state and an exterior side adapted for facing the exterior of the building in the mounted state, wherein an exterior side of the bottom frame member is inclined so that in the mounted and closed state of the roof window, said exterior side of the frame bottom member has a lower inclination than the exterior side of the pane, and wherein the window comprises a sash bottom covering and a frame bottom covering, which are both provided with a bend, so that a section extends towards
  • windows of this kind When windows of this kind are mounted deep in the roof structure, they project only a little or not at all above the exterior surface of the roofing used as the outermost weather screen of the roof structure. Mounting the windows deep in the roof is often considered to provide aesthetics advantages, but it also provides thermal advantages as explained in EP2843148A and/or gives room for sun-screening devices as in DE20316919U1 .
  • Arranging the window with the exterior surface of the pane below an exterior surface of the roof means that precipitation hitting the pane and running or sliding down towards the bottom members of the sash and frame will end up at a level from where it cannot continue directly onto the roofing. It therefore has to be brought up to the level of the exterior side of the roofing in order to be drained off.
  • a gutter shaped flashing member is provided below the window seen in the direction of slope of the roof structure, said flashing member having a first section, which is arranged to abut directly or indirectly against an outer side of the frame bottom member facing away from the frame opening, and a second section, which is arranged with a lower inclination than the roof in the mounted state, so that it may "lift” water up to the exterior surface of the roofing.
  • Such gutter flashing members which typically have a U- og V-shaped cross-section, work very well, but there is a limit to how deep they can project into the roof construction without influencing the thermal properties of the construction too much in a negative direction.
  • windows are mounted with the pane below the exterior side of the roofing this has been seen to result in water overflowing the upper side of the first section of the gutter flashing member and penetrating into the roof construction.
  • the precipitation includes snow or hail, which does not easily flow onto the roofing material and thus fills the gutter, or if the gutter is filled wholly or partially with dirt, such as leaves or moss.
  • EP 1 760 220 discloses another roof window having a bottom frame member with an inclined exterior surface and bottom coverings having a section extending towards the interior of the building.
  • a roof window according to claim 1 where, in the mounted and closed state of the window, the exterior side of the frame bottom member is located in the interval between 0 mm and 30 mm above the exterior side of the pane measured in a direction perpendicularly to the exterior side of the pane.
  • the first section of the bottom flashing member may also project relatively far from the bottom of the gutter and hence that the gutter may have a larger volume than with a prior art window mounted in the same depth in the roof structure.
  • the exterior side of the frame bottom member is to be understood as meaning the highest point on the frame bottom member when seen in a direction from the interior side of the frame bottom member towards the exterior side and perpendicularly to the exterior side of the pane. Often this will also be the point located highest in the mounted state, but it need not be case.
  • the exterior side of the frame bottom member is located in the interval between 15 mm and 25 mm, preferably approximately 20 mm, above the exterior side of the pane measured in a direction perpendicularly to the exterior side of the pane.
  • the distance from the interior side of the pane to the exterior side of the frame bottom member is 25-100 mm, more specifically 45-85 mm measured in a direction perpendicularly to the exterior side of the pane.
  • a first section of the exterior side of the frame bottom member located at an outer side of the frame facing away from the frame opening is located above a second section of the exterior side of the frame bottom member located at an inner side of the frame facing the frame opening measured in a direction from the interior side of the frame bottom member towards the exterior side of the frame bottom member and perpendicularly to the exterior side of the pane.
  • the exterior side of the frame bottom member may be embodied in several different ways, including a wooden surface covered by lacquer or paint in the case of a window having a traditional wooden frame or a polymer surface if the window frame is for example made by moulding polyurethane onto a core of reinforcing and/or insulating members as is also well-known within this field.
  • the frame bottom member is composed of several different elements, the exterior surface may be formed by for example an insulating element attached to the exterior surface of a load-bearing frame member such that the insulating member is forming the actual exterior surface of the frame at the bottom member.
  • a frame bottom cladding, covering or flashing member may be arranged on the exterior side of frame member, thereby forming the exterior surface of the frame at the bottom member.
  • sash bottom covering which extends from the exterior side of the pane over the frame bottom member so as to lead water etc. onto the flashing member arranged below the window.
  • the sash bottom covering also covers the joint between the pane and the sash bottom member.
  • such a sash bottom covering is arranged at an angle to the exterior side of the pane so that in the mounted and closed state of the window it has a lower inclination than the exterior side of the pane.
  • the sash bottom covering is angled slightly upwards in relation to the plane defined by the exterior side of the pane, thereby "lifting" water or other precipitation running down along the pane and thus effectively creating a greater distance to the bottom of the gutter formed by the bottom flashing member.
  • a negative inclination of the sash bottom covering i.e. an inclination in a direction opposite the pitch of the roof, is, however, usually undesirable as it may result in the formation of pools of water, which cannot be drained off and which in turn can cause deterioration of the materials of the window and/or leakage into the roof construction.
  • the exterior side of frame bottom member is inclined as described above it may be given substantially the same angle of inclination as the sash bottom covering, so that in the closed state of the roof window the sash bottom covering will be substantially parallel with the exterior side of the frame bottom member and with a possible frame bottom covering arranged on and in parallel with the exterior side of the frame bottom member. This will reduce the risk of wind and dirt entering the space between the sash and the frame, particularly as the sash bottom covering and a frame bottom covering are both provided with a bend, so that a section extends towards the interior side.
  • the sash bottom covering may be attached either to the pane or to the sash or to both.
  • the sash bottom covering is connected directly to the pane in a manner, which allows water to pass from the exterior side of the pane and onto the sash bottom covering. This may for example be achieved by attaching the sash bottom covering to the pane using an adhesive, and/or by waterproofing the joint between the sash bottom covering and the pane using a sealing strip or a caulking compound.
  • a border element attached to the pane.
  • a border element may for example be provided by moulding and may extend only along the bottom edge of the pane, along several edges of the pane, or even along the entire circumference of the pane.
  • a border element may embrace the rim of the pane entirely so that it extends from interior side to the exterior side and extends over both of them, or that it may be locate only at one side of the pane.
  • a border element may be provided as one or more discrete member(s) having a shorter extend than the width of the pane.
  • sash bottom covering to the sash bottom member, either as the sole means of attachment or as a supplement to an attachment to the pane as described above.
  • Attachment to the sash bottom member may for example be achieved by means of screws.
  • a cladding may be provided and adapted to lead water from the pane onto the sash bottom covering.
  • the sash bottom covering will typically be provided at the exterior side of the pane, but is also possible to provide it at the interior side of the pane, particularly if using a pane projecting over the exterior side of the sash bottom member.
  • kits including a bottom flashing member and a roof window comprising a sash and a frame, said sash carrying a pane and being connected to the frame via hinges, and said frame being adapted for being connected to a load-bearing structure of a roof of a building, where each of the sash and the frame comprises two side members, a top member and a bottom member, where said frame members delimit a frame opening and said sash members delimit a sash opening, where each of the pane, the sash members and frame members has an interior side adapted for facing the interior of the building in the mounted state and an exterior side adapted for facing the exterior of the building in the mounted state, where, in the mounted and closed state of the window, the highest point on the bottom flashing member, which is located furthest away from interior side of the frame bottom member when measured in a direction perpendicularly to
  • the corresponding high position of the highest point on the bottom flashing member will still make it possible to reduce the risk of water penetrating into the roof construction at the bottom member of the frame when the roof window is mounted with the pane at least partially below an exterior surface of the roof.
  • This may require the bottom flashing member to be made of a somewhat stiffer material in order to withstand the water pressure occurring when the gutter is full, since it is not supported by the frame bottom member along its entire height, but otherwise the flashing member can be substantially the same as described above.
  • the highest point on the bottom flashing member which is located furthest away from interior side of the frame bottom member when measured in a direction perpendicularly to the exterior side of the pane, is located in the interval between 15 mm and 25 mm, preferably approximately 20 mm, above the exterior side of the pane measured in a direction perpendicularly to the exterior side of the pane.
  • a roof window 1 comprising a frame and a sash carrying a pane 2 and where the sash is connected to the frame via hinges is shown in Fig. 1 .
  • the window is mounted in a roof with a pitch of approximately 40 degrees and the roofing is tiles, but it will be understood that the window may also be used in other types of roofs.
  • the joint between the roof and the window is weather-proofed with a flashing assembly 4, which includes a series of flashings members and covering members, of which only the sash bottom covering 41 and the bottom flashing member 42 with the skirt member 43 are clearly visible in Fig. 1 , as well as a top casing 44 and cladding members 45, 46 on the side members of the frame and sash, respectively.
  • flashing assemblies are well known and will therefore not be described in further detail.
  • a roof window according to the invention is shown in a cross-sectional partly cut-away view, where the load-bearing structure is represented by a lath 5 supporting the roofing 3.
  • the sash is represented only by the sash bottom member 11 and the frame by the bottom member of the frame 12, but it will be understood that both the sash and frame further comprises a top member and two side members, so that the frame members delimit a substantially rectangular frame opening and the sash members delimit a substantially rectangular sash opening in the same way as shown in Fig. 1 .
  • the bottom flashing member 42 has a first section 421 extending up along an outer side 123 of the frame bottom member 12 so that the bottom flashing member 42 with the skirt member 43 forms a gutter below the window.
  • the first section is provided with a flange projecting over the exterior side 121 of the frame bottom member and a frame bottom covering 47 is attached on top of it and extending down along the outer side of the frame bottom member in order to provide extra weather-proofing, but this need not be the case.
  • the exterior side 121 of the frame bottom member 12 is located at a distance d 3 above the exterior side 21 of the pane measured in a direction perpendicularly to the exterior side of the pane, the distance d 3 here being approximately 15 mm.
  • the distance d 3 from the exterior side 21 of the pane to the highest point on frame bottom member 12 will of course depend on the thickness of the pane.
  • the window is provided with a three-layer pane, where the interior pane layer forming the interior side 22 of the pane is laminated glass.
  • Such a pane 2 has a thickness of approximately 50 mm, meaning that the distance d 4 from the interior side 22 of the pane to the highest point on the frame bottom member 12 measured in a direction perpendicularly to the exterior side of the pane is here approximately 65 mm.
  • the window is mounted deep in the roof with the interior side 22 of the pane 2 substantially at level with the level B defined by the exterior surfaces of the laths 5 (also known as the blue level) and with the pane located below the exterior surface of the roofing in the mounted and closed state of the window. Consequently, the distance d 1 from the lowermost point on the bottom flashing member 42 to the exterior side 21 of pane is relatively low. With a traditional roof window (not shown) this would result in that the distance from the lowest point on bottom flashing member including the skirt member to the highest point on the exterior side of the frame bottom member and hence the uppermost level of the first section of the bottom flashing member becoming very small, thus leading to a potential risk of water overflowing the exterior side of the frame bottom member and entering the building.
  • the distance d 2 from the lowest point on bottom flashing member to the highest point on the exterior side of the frame bottom member remains sufficiently high to ensure a good weather proofing thanks to the exterior side 121 of the frame bottom member being positioned above the exterior side 21 of the pane.
  • the highest point on the bottom flashing member 42 which is located furthest away from interior side of the frame bottom member 12 when measured in a direction perpendicularly to the exterior side of the pane, is the bend where the flange projecting over the exterior side 121 of the frame bottom member is connected to the main part of the first section 421.
  • the sash bottom covering 41 in Fig. 2 has been arranged at an angle A with respect to the plane defined by the exterior side 21 of the pane, so that in the mounted and closed state of the window the sash bottom covering has a lower inclination than the exterior side of the pane and extends over the exterior side of the frame bottom member 12. This allows the sash bottom covering to "lift" water running down along the pane to a higher level in a direction perpendicularly to the exterior side of the pane, thereby allowing it to pass over the exterior side of the frame bottom member.
  • the angle A allows the window to be adapted for different pitches of the roof and/or the exterior side of the frame bottom member to be located even higher. Regardless how the sash bottom covering 41 is embodied and attached the angle A should preferably be such that in the mounted and closed position of the window, the part of the covering extending from the exterior of the pane is inclined in the same direction as the roof. This ensures that water and other precipitation will flow or slide off the sash bottom covering instead of forming a pool or pile on the pane.
  • the sash bottom covering 41 is attached to a moulded border element 6, which is provided on the edge of the pane 2, but it is also possible to attach it to the sash in a manner known per se.
  • Fig. 3 shows another embodiment of the invention, where the exterior side 121 of the frame bottom member 12 is located even higher, here approximately 25 mm, above the exterior side 21 of the pane 2, and where the angle A is consequently somewhat larger than in Fig. 2 .
  • the sash bottom covering 41 is provided with a flange extending in parallel with the exterior side of the pane and this flange has been attached directly to the pane by means of a caulking material 23. Adhesives or other means for attachment may also be used for this purpose.
  • Fig. 3 as well as in Figs 4 and 5 , which will be described below, the windows are shown with a bottom flashing member 42 as the only weather protection of the frame bottom member, but it is to be understood that a frame bottom covering 47 may be provide as in Fig. 2 and that the flashing assembly may vary in other ways. Likewise, it is to be understood that the invention is not limited to a particular type of panes and that unless otherwise stated the shapes of the sash member, frame members and other parts of the window and/or flashing assembly may vary in relation to what is shown.
  • the exterior surface 121 of the frame bottom member 12 is shown as being inclined with substantially the same inclination as the sash bottom covering. This allows the frame member and hence the flashing member 42 attached thereto to follow the shape of the covering and hence prevent wind and dirt from entering the space between the sash and the frame.
  • the exterior side 121 of the frame bottom member includes a first section located at an outer side 123 of the frame facing away from a frame opening and a second section at an inner side, where the first section is located above the second section when measured in a direction from the interior side of the frame bottom member towards the exterior side 121 of the frame bottom member and perpendicularly to the exterior side 21 of the pane.
  • Said first and second sections do not have to be provided in continuation of each other as in this embodiment, but may also be embodied in other ways, including being formed as separate steps and/or being separated by a groove adapted for receiving a flange (not shown) on the flashing or covering member or a sealing strip (not shown).
  • FIG. 4 Another embodiment of a roof window according to the invention is shown in Fig. 4 .
  • the exterior side 121 of the frame bottom member 12 is located at level with the exterior side 21 of the pane 2 and the bottom flashing member 42 does not project over the exterior side of the frame bottom member.
  • the distance d 4 is here approximately 25 mm corresponding to a traditional double glazing unit.
  • FIG. 5 An embodiment resembling the one in Fig. 2 with respect to the height of the frame bottom member 12 is shown in Figs 5 and 6 .
  • skirt member 43 extends beyond the bottom flashing member 42 in order to provide an overlap with a side flashing member 48 and the side sash cladding member 45 is seen extending along the side of the pane 2 in Fig. 6 .
  • the sash bottom covering 41 is here attached to two holders 411 arranged one at each side of the window, and the exterior side of the sash bottom covering abuts on an interior side of a flange 61 of the border element 6.
  • a bend edge 412 provides the sash bottom covering 41 with sufficient strength and stiffness to maintain its shape, but it is also possible to attach it to the border element for extra support, either at discrete points or sections or continuously along the entire length.
  • a continuous attachment to the border element is presently preferred as it will also provide improved water-tightness.
  • further holders may be provided in the space between the inner side 122 of the frame bottom member 12 and the border element. Such holders may also contribute to supporting the pane 2.
  • Fig. 7 shows a window mounted with a flashing kit where the exterior side 121 of the frame bottom member 12 is at level with the interior side of the pane and where the bottom flashing member projects above the exterior side 21 of the pane.
  • the highest point which any water collected in the gutter formed by the bottom flashing member 42 and a possible skirt attached thereto will have to pass over to penetrate into the roof construction, is the highest point on the bottom flashing member 42, i.e. the bend 424 where the flange 423 projecting over the exterior side 121 of the frame bottom member is connected to the main part of the first section 421.
  • the distance d 3 is here 30 mm.
  • the kit consisting of the bottom flashing member 42 and the roof window 1 allows the roof window to be installed deep in the roof even if the roof window itself is designed for other purposes.
  • the room 425 provided between the bottom flashing member 42, the frame bottom member 12 and the sash bottom member 11 may for example be used to house a ventilation unit (not shown) or allow the provision of additional insulation material (not shown) depending on the climate zone in which the kit is to be used.
  • the exterior side of the frame bottom member is located in the interval between 0 mm and 30 mm above the exterior side of the pane measured in a direction perpendicularly to the exterior side of the pane in the mounted and closed state of the window.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
EP17178911.8A 2016-07-01 2017-06-30 A roof window and a sloping roof structure Active EP3263797B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17178911T PL3263797T3 (pl) 2016-07-01 2017-06-30 Okno dachowe i pochyła konstrukcja dachowa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA201600395A DK201600395A1 (en) 2016-07-01 2016-07-01 A roof window, a kit including a bottom flashing member and a roof window, and a sloping roof structure

Publications (2)

Publication Number Publication Date
EP3263797A1 EP3263797A1 (en) 2018-01-03
EP3263797B1 true EP3263797B1 (en) 2021-05-19

Family

ID=59298230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17178911.8A Active EP3263797B1 (en) 2016-07-01 2017-06-30 A roof window and a sloping roof structure

Country Status (6)

Country Link
EP (1) EP3263797B1 (zh)
CN (1) CN207063350U (zh)
DE (1) DE202017007274U1 (zh)
DK (1) DK201600395A1 (zh)
HU (1) HUE055271T2 (zh)
PL (1) PL3263797T3 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023186247A1 (en) * 2022-03-31 2023-10-05 Vkr Holding A/S A roof window and a method for mounting a roof window

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU194971U1 (ru) * 2019-08-21 2020-01-09 Общество с ограниченной ответственностью "Летний сад" (ООО "Летний сад") Мансардное окно
DK180977B1 (en) * 2019-12-30 2022-08-29 Vkr Holding As A roof window system with a ventilation unit mounted adjacent to the roof window, a roof structure including a roof window system, a method of providing a roof window system and a method of retrofitting a roof window system
EP3779091B1 (en) * 2020-02-03 2023-03-15 VKR Holding A/S A skylight window
EP3783161B8 (en) * 2020-02-03 2022-05-11 VKR Holding A/S A skylight window

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Publication number Priority date Publication date Assignee Title
DE343966C (zh) *
US4663905A (en) * 1986-09-02 1987-05-12 Kenneth Schulz Skylight assembly
JPH07233597A (ja) * 1994-02-24 1995-09-05 Asahi Glass Co Ltd 天 窓
PL2088256T3 (pl) * 2005-09-05 2012-09-28 Vkr Holding As Ościeżnica okna dachowego i sposób jej wytwarzania
EP2192248B1 (en) * 2008-11-26 2015-07-15 VKR Holding A/S Roof component flashing, a flashing system and a method of flashing
EP2488710A1 (en) * 2009-10-12 2012-08-22 CSA Lundegaard Holding APS A window construction and a method for mounting the window construction

Non-Patent Citations (1)

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023186247A1 (en) * 2022-03-31 2023-10-05 Vkr Holding A/S A roof window and a method for mounting a roof window

Also Published As

Publication number Publication date
DK201600395A1 (en) 2018-01-29
EP3263797A1 (en) 2018-01-03
DE202017007274U1 (de) 2020-07-27
HUE055271T2 (hu) 2021-11-29
PL3263797T3 (pl) 2021-11-29
CN207063350U (zh) 2018-03-02

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