Roof window including a sash having an intermediate element - Patents.com

Abstract

In the roof window (1), each sash member (32) comprises a profile element (32a), an inner element (32c) and an intermediate element (32b) forming a connection between the profile element and the inner element of each sash member. The inner element (32c) of the sash member (32) forms a coherent inner element sash structure supporting the inner edge portions of the panes (4), and the profile elements (32a) of the sash members (32) are disposed along respective outer edge portions of the panes (4). The intermediate element (32b) of each sash member (32) comprises engagement means (32b3) configured to form a structural connection with the inner element (32c) at one of at least two different positions in the height direction.

Description

[Technical field]

[0001] The present invention relates to a roof window comprising a frame, a sash and a pane, the frame comprising a set of frame members including a top frame member, two side frame members and a bottom frame member, the sash comprising a set of sash members including a top sash member, two side sash members and a bottom sash member, each frame and sash member defining a longitudinal direction, the pane comprising an outer sheet and at least one inner sheet, the pane comprising a plurality of edge portions and an outer pane surface, the plane of the roof window being defined by an outer side of the outer sheet of the pane, and the height direction of the frame and sash members being substantially perpendicular to the plane and extending from the interior to the exterior of the roof window. [Background technology]

[0002] There are various types of roof windows that are installed on sloping roof surfaces. When selecting a roof window type for a particular specific location in a building, typically great importance is given to parameters such as operability, thermal properties, weather resistance, and suitable finishes for the interior of the building; however, it is often desirable, and in some areas even necessary, to also consider appearance. This is especially true when installing roof windows in protected areas, where building regulations may require that the roof window meet standards or local requirements. Therefore, certain requirements apply depending on whether the installation concerns a new roof window or is replacing an existing window or skylight as part of a renovation or remodeling project.

[0003] Because past windows or skylights were typically made of cast iron and had multiple single-pane components separated by one or more cast iron bars, the thermal efficiency of these roof windows or skylights left room for improvement. To meet the energy performance required by modern building regulations, conservation roof windows are typically provided with insulated panes while at the same time being designed to mimic the appearance of a traditional skylight.

[0004] In many installation situations, it is an additional requirement that a conservation roof window be able to be installed in a "low profile", i.e. that the portion of the roof window that protrudes above the surrounding roof has as little height as possible. This is particularly evident in buildings that have substantially flat roof materials such as slate or shingle. To meet this requirement, most major roof window manufacturers allow installation in at least two stages, thereby accommodating a variety of roof profile heights and installation conditions.

[0005] Due to the ever-increasing awareness of environmental concerns and the desire to reduce or eliminate the environmental footprint of products, there is a further need to provide products that are more environmentally friendly in terms of manufacture, supply, installation and use.

[0006] Considering all the above requirements, retrofitting roof windows for conservation purposes is an ongoing quest. Summary of the Invention

[0007] Against this background, it is an object of the invention to provide a roof window which makes it possible to obtain increased flexibility in the selection of the components of the roof window.

[0008] This and further objects are achieved by a roof window of the type mentioned in the opening paragraph, characterized in that each sash member comprises a profile element, an inner element and an intermediate element forming a connection between the inner element and the profile element of each sash member, the inner elements of the sash members forming a coherent inner element sash structure supporting the inner edge portions of the panes, the profile elements of the sash members being arranged along respective outer edge portions of the panes, and the intermediate element of each sash member comprising engagement means configured to form a structural connection with the inner element in one of at least two different positions in the height direction.

[0009] This design allows the use of the same sash components in roof windows with panes of different thicknesses. Under normal circumstances, the insulating properties of the pane increase with the thickness of the pane and / or the number of sheets or layers. Typically, the selection of the insulating properties of the pane is made according to the climate and the requirements for the roof window. The present invention allows the use of the same components for a variety of products with different requirements regarding weather protection.

[0010] In a currently preferred embodiment, the exterior of each inner element is provided with receiving means arranged to receive the engagement means of the intermediate element of the respective sash member, thereby ensuring accurate positioning and reliable engagement between the inner and intermediate elements, which engagement may be form-locking, which provides good load transfer performance of the structure, in that the load resulting from the weight of the panes, together with other forces such as wind loads to which the sash is exposed, is distributed between the inner and intermediate elements.

[0011] In a development of this preferred embodiment, the receiving means comprises at least two longitudinally extending grooves spaced apart from one another in the height direction, which grooves open in the outward direction of the roof window, the height distance between which provides the aforementioned two different positions in the height direction for the structural connection. Such grooves are easily formed in the inner element during manufacture and, by their longitudinal extension, form a coherent abutment surface for the engaging means of the intermediate element, thus further improving the load transfer characteristics.

[0012] In a currently preferred embodiment, each intermediate element comprises a base portion extending substantially in height and a head portion extending at an angle to the base portion, the base portion being provided with said engagement means on an inner surface thereof facing an outer surface of the respective inner element, in this way a suitable connection of the intermediate element to the inner element is made at the base portion, whilst the head portion can be used for connection with the profile element of the sash member.

[0013] In a further development of this preferred embodiment, the engagement means of the base portion of each intermediate element comprises a protruding portion configured to engage with a groove of a selective one of the inner elements of the sash member, such protruding portion ensuring easy positioning and proper mechanical properties.

[0014] Additional fastening means may be provided for fastening the intermediate element or elements to the respective inner elements of the sash members. Such additional fastening means may be in the form of screws or bolts, which are introduced into suitable openings in the intermediate and inner elements. If the inner elements are made of a material such as wood, it is also possible to envisage using self-tapping screws.

[0015] In a further embodiment, the base portion of each intermediate element comprises a stepped section offset inwards by an offset bend relative to the remaining section of the base portion, and the engagement means is provided on said stepped section, so that the connection between the intermediate element and the inner element can be made where the elements meet, while leaving a space towards the outside, leaving sufficient room for the panes with attached components such as pane clips.

[0016] The base portion of each intermediate element preferably comprises one or more apertures, optionally provided in the stepped section, configured to receive additional fastening means, with pre-formed apertures being preferred over, for example, holes drilled at installation site.

[0017] In a currently preferred embodiment, the intermediate elements of the top sash member and the two side sash members are formed as a set of longitudinal profiles, and although multiple individual intermediate elements could in principle be used in each sash member, the provision of a single longitudinal profile in each sash member offers several advantages not only during manufacture and assembly, but also in use due to the load-distributing capabilities of the longitudinally coherent areas.

[0018] In a further development of this preferred embodiment, the engagement means of the intermediate element of the set of longitudinal profiles is formed as a flange extending over the entire length of the profile. Such a flange is easy to incorporate into the profile cross-section and facilitates the assembly process.

[0019] Preferably, the intermediate elements of the set of longitudinal profiles have a uniform cross section, in this way one and the same intermediate element cross section can be used in the top sash member and in the side sash member, thus providing a cost-efficient solution in terms of manufacturing and storage resources.

[0020] In principle, any suitable manufacturing process can be used for forming the profiles. In a currently preferred embodiment, the longitudinal profiles of the set of longitudinal profiles are formed by a continuous molding process such as extrusion or pultrusion, in particular the longitudinal profiles can be formed by pultrusion of a composite material. Such manufacturing processes are well established and offer great flexibility in terms of the choice of suitable resins and materials, including reinforcing fibers.

[0021] In a further embodiment, the intermediate element of the bottom sash member includes at least one set of fittings which provide improved flexibility in assembly and can be custom configured to meet the specific requirements of a particular roof window.

[0022] Preferably, each set of fittings comprises at least one connecting fitting provided with engagement means configured to form a structural connection with the inner element in one of at least two different positions in the height direction, which provides a mechanically sufficient connection.

[0023] The at least one connecting fitting may comprise a first fitting and a second fitting, the first fitting may comprise the engagement means and the second fitting may be configured to be connected to the first fitting so as to act as a spacer between an outer surface of the inner element of the bottom sash member and the first fitting. This provides a suitable combination of flexibility and mechanical reliability.

[0024] For example, the second attachment part may be provided with at least one resilient hook configured to interact with a corresponding opening in the first attachment part, thus forming a snap connection, making assembly very easy.

[0025] In one embodiment, the head portion of the intermediate element of the bottom sash member is configured to be received in a slit in the inner portion of the profile element of the bottom sash member in the assembled state of the sashes, ensuring an easily achieved yet sturdy connection of the intermediate element with the profile element of the bottom sash member.

[0026] Other presently preferred embodiments and further advantages will become apparent from the detailed description and drawings which follow.

[0027] A feature described in relation to one of the aspects may be incorporated in the other aspects as well, and the advantages of that feature are applicable to all aspects in which it is incorporated. [Brief description of the drawings]

[0028] In the following description, embodiments of the invention will be described with reference to the drawings, in which [Figure 1] FIG. 1 is a perspective view of a roof window according to one embodiment of the invention, seen from the inside side. [Diagram 2] FIG. 2 is a perspective view of the roof window of FIG. 1, seen from the exterior side. [Diagram 3] FIG. 3 is a perspective cross-sectional side view of a roof window in another embodiment having a mounting bracket, corresponding to the cross-section taken along line III-III in FIG. [Figure 4] FIG. 4 is a view corresponding to FIG. 3, showing the insulating frame pieces exploded. [Diagram 5] FIG. 5 is a cross-sectional view taken along line III-III in FIG. [Figure 6] FIG. 6 is a cross-sectional view of a roof window in a further embodiment, corresponding to the cross-section along line VI-VI in FIG. [Figure 7] FIG. 7 is a view corresponding to FIG. 6, with the sash in the open position. [Figure 8]FIG. 8 is a perspective cross-sectional view of a roof window in an embodiment incorporating an operating assembly, corresponding to the cross-section taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along a line parallel to line VIII-VIII in FIG. [Figure 10] FIG. 10 is a partial perspective view of a roof window incorporating a hinge assembly and an operating assembly with the sash in an open position. [Figure 11] FIG. 11 is a partial perspective cross-sectional view of the frame of the roof window of FIG. 10, together with the insulating frame. [Figure 12a] FIG. 12a is a partial perspective view of the roof window sash of FIG. [Figure 12b] FIG. 12b is a perspective cross-sectional view of the sash of FIG. 12a. [Figure 13a] Figure 13a is an exploded cross-sectional view of a detail of Figure 12a. [Figure 13b] FIG. 13b is a perspective view of a detail of the sash of FIG. 12a. [Figure 14a] FIG. 14a is a partially exploded perspective view of the sash of FIG. 12a. [Figure 14b] Figure 14b is a perspective cross-sectional view of the detail shown in Figure 13a. [Figure 15] FIG. 15 is a partial perspective view of an intermediate element of the roof window sash of FIG. [Figure 16] FIG. 16 is a cross-sectional view corresponding to FIG. 5, but of the sash separated from the frame. [Figure 17] FIG. 17 is a simplified cross-sectional view corresponding to FIG. [Figure 18] FIG. 18 is a view corresponding to FIG. 17 of a roof window in another embodiment of the invention in which the panes have a greater overall thickness. [Figure 19] Figure 19 is an exploded perspective view of an upper corner of a roof window sash in a further embodiment. [Figure 20]20 and 21 are perspective views of the corner key of the sash of FIG. 19, seen from different angles. [Figure 21] 20 and 21 are perspective views of the corner key of the sash of FIG. 19, seen from different angles. [Figure 22] FIG. 22 is an exploded perspective view of a roof window frame and sash in an embodiment incorporating a hinge assembly. [Figure 23] FIG. 23 is a partial perspective view of a detail of the roof window of FIG. 22. [Figure 24] FIG. 24 is a perspective view of a roof window incorporating a flashing assembly in a typical embodiment of the invention. [Diagram 25] FIG. 25 is a partial perspective exploded view of an upper corner of the roof window frame in the embodiment of FIG. [Figure 26] 26 and 27 are cross-sectional views of elements of the interface unit of FIG. [Figure 27] 26 and 27 are cross-sectional views of elements of the interface unit of FIG. [Figure 28] FIG. 28 is a partial side view of the roof window in the open position shown in FIG. 7, illustrating the interaction between the interface unit of FIG. 25 and the sash. [Figure 29a] FIG. 29a is a cross-sectional view taken along line XXIX-XXIX in FIG. [Figure 29b] FIG. 29b is a corresponding view to FIG. 29a of an alternative embodiment to the general embodiment of FIG. [Diagram 30] FIG. 30 is a cross-sectional view of an alternative embodiment, corresponding to the cross-section taken along line XXX-XXX of the general embodiment of FIG. [Diagram 31] FIG. 31 is a cross-sectional view of an alternative embodiment, corresponding to the cross-section taken along line XXXI-XXXI of the general embodiment of FIG. [Diagram 32] FIG. 32 is a partial perspective view of the upper right corner of an alternative embodiment of a roof window. [Diagram 33] FIG. 33 is a partial cross-sectional view of the upper right corner of one embodiment of a roof window according to the invention. [Diagram 34] FIG. 34 is a partial perspective view of the lower right corner of an alternative embodiment of a roof window. [Diagram 35] FIG. 35 is an enlarged perspective view of a detail of the embodiment of FIG. [Diagram 36] FIG. 36 is an enlarged perspective view of further details of the embodiment of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Description of the embodiments In the following detailed description, preferred embodiments of the present invention will be described. However, it will be understood that the features of different embodiments can be exchanged between the embodiments and can be combined in different ways, unless otherwise stated. It will also be noted that for clarity, the dimensions of certain components shown in the drawings may differ from the corresponding dimensions in the actual implementation.

[0030] It is noted that terms such as "top", "bottom", "left hand", "right hand", "exterior", "interior", "outside", "inside" etc. are relative and refer to the viewpoint in question. Generally, when referring to the exterior side, this relates to the side of the roof window as installed that faces the outdoors or the exterior side of the building. Conversely, the interior side refers to the side that faces the inside side of the building, i.e. the room below, which typically includes any light shafts. Terms such as "outward facing" and "inward facing" refer to directions generally perpendicular to the interior-exterior direction, with the center of the roof window as its origin.

[0031] General description of roof windows - Figure 1 and Figure 2 1 and 2, there is shown a roof window 1. The roof window 1 is intended to be installed on a sloping roof surface (not shown).

[0032] The roof window 1 comprises a frame 2, a sash 3 and a pane 4. The frame 2 comprises a set of frame members including a top frame member 21, two side frame members 22, 23 and a bottom frame member 24. Correspondingly, the sash 3 comprises a set of sash members including a top sash member 31, two side sash members 32, 33 and a bottom sash member 34. Although the frame 2 and sash 3 are described as rectangular structures, some principles of the concepts presented may be applicable to other geometric shapes.

[0033] The pane 4 comprises a number of edge portions which are generally associated with members of the sash 3, as will be explained in more detail below. When in the closed position, the outer pane surface 4e defines a pane of the roof window 1 in the assembled state of the roof window 1. The assembled state of the roof window 1 is achieved when the main components of the frame 2 and the sash 3 are assembled and the frame 2 and the sash 3 are connected to one another, e.g. in an installed position when the roof window 1 is prepared for use. Correspondingly, the assembled state of the sash 3 is achieved when the main components of the sash 3 are assembled, and the assembled state of the frame 2 is achieved when the main components of the frame 2 are assembled.

[0034] The inner pane face 4i faces the interior, typically the room of the building below the roof surface in which the roof window 1 is installed. The outer pane face 4e has rungs 45 attached, and the inner pane face 4i has rung covers 46 attached. It would be possible, although less practical, to have a two-part pane with two pane halves separated by a thorough rung. In a wide roof window it is also possible to have more than two rungs, for example two rungs dividing the face of the pane visible from the outside into three sections.

[0035] In the embodiment shown, the sash 3 is openable and closable relative to the frame 2 to obtain one or more open positions. In such open positions, the sash 3 and pane 4 are moved out of the plane of the roof window 1. As will be explained below, the sash 3 is shown to be top-hung, i.e. such that in normal use the sash 3 rotates about a substantially horizontal hinge axis at or adjacent the top frame member 21 and top sash member 31. However, it is conceivable to apply some of the principles of the concepts presented with respect to roof windows to different types of windows having other opening patterns or provided as fixed skylights.

[0036] Further details shown in Figures 1 and 2 include an operating assembly 5, shown here as a handwinder or screwjack, although other operating assemblies may also be presented.

[0037] Also shown is a representative mounting bracket 6 which forms part of a plurality of mounting brackets which form a load-transfer connection between the roof window 1 and the surrounding roof structure (not shown), which may include rafters and battens, plywood, or other building materials.

[0038] Finally, an insulating frame 7 is shown. Insulation by an insulating frame is optional and may be provided along only some of the frame members or may surround all four frame members 21, 22, 23, 24 as shown.

[0039] In the following description of various embodiments, elements having the same or similar functionality are provided with the same reference numerals throughout. Suitable variations and modifications will be apparent to those skilled in the art.

[0040] Roof window with mounting bracket and set of mounting brackets - Fig. 3-4 Typically, a roof window, such as the roof window 1 shown in Figures 1 and 2, is equipped with a set of mounting brackets 6. As shown, two mounting brackets 6 are fixed to each side frame member 22, 23. A single mounting bracket 6 will be described below in relation to one side frame member 22. The mounting brackets 6 of the set will in most cases be identical, although there can be variations.

[0041] The mounting bracket 6 comprises a first bracket leg 61 for fastening to a roof structure and a second bracket leg 62 for fastening to the frame 2 of the roof window 1. For that purpose, the second bracket leg 62 comprises an engagement means which interacts with a corresponding receiving structure on the outer side of the side frame member 22 of the frame 2 of the roof window 1. This ensures that the mounting bracket 6 is correctly positioned on the side frame member 22, facilitating the mounting process. The positioning of the mounting bracket 6 can be indicated both in the longitudinal and height direction of the side frame member 22, for example by suitable markings and / or holes. The first bracket leg 61 of the mounting bracket 6 is connected to the second bracket leg 62 via a bent section 614.

[0042] In the embodiment shown, the second bracket leg 62 is provided with first engagement means 624 in a first section 621 of the second bracket leg 62 and second engagement means 629 in a second section 626 of the second bracket leg 62 .

[0043] Of these two engagement means 624, 629, the second engagement means 629 is adapted to assume a non-activated position and an activated position, of which the activated position is shown.

[0044] The first engagement means 624 is configured to be received in one receiving structure on the outside of the frame member 22 in the mounted state of the mounting bracket 6 on the frame 2 of the roof window 1, and the second engagement means 629 is configured to be received in another receiving structure on the outside of the frame member 22 only in its operative position in the mounted state of the mounting bracket 6 on the frame 2 of the roof window 1. This is most clearly shown in FIG. 4, in which the first engagement means 624 is received in the first outer groove 27 and the second engagement means 629 is received in the second outer groove 27b. At least the side frame members 22, 23 each have a number of receiving structures on the outside of the respective side frame member, such that in the mounted state of the roof window 1, at least one of the receiving structures interacts with the mounting bracket 6. The first outer groove 27 and the second outer groove 27b both extend in the longitudinal direction of the side frame member 22 at a height distance from each other, the first outer groove 27 being located outside the second outer groove 27b as viewed in the height direction.

[0045] In order to bring the second section 626 having the second engagement means 629 from a position in the opening 620 in the second bracket leg 62 to a position in which the second section 626 is located substantially in extension of the first section 621, the second section 626 having the second engagement means 629 is connected to the first section 621 via a hinge connection 625 and is configured such that by rotating the second section 626, the second section 626 can be brought from a non-operated position to an operated position.

[0046] In the embodiment shown, the first and second engagement means each include a flange 624, 629 that projects substantially perpendicularly from the respective first and second sections 621, 626. Alternative configurations are also contemplated, such as discrete spikes.

[0047] Hinge Assembly and Coupling Unit - Figures 6-7, 22 and 23 Referring first to FIGS. 6 and 7, the roof window 1 is shown to further comprise a hinge assembly 9.

[0048] The hinge assembly 9 is configured such that in a first operational condition which corresponds to normal use, the sash 3 is top hung, i.e. during normal use, the sash 3 is rotated about a substantially horizontal first hinge axis at or adjacent the top frame member 21 and top sash member 31 between the closed and open positions.

[0049] 22 and 23, it can be seen that the hinge assembly 9 comprises a hinge unit 91 having a frame hinge portion 92 connected or connectable to at least the top frame member 21, a sash hinge portion 93 connected to at least the top sash member 31, and a hinge pin 94 connecting the frame hinge portion 92 to the sash hinge portion 93.

[0050] The term "connected to" implies that the component in question is in a state, condition, or location where it is actually connected to the part, whereas the term "connectable to" is intended to encompass a state, condition, or location where the component in question is connectable to the associated part, but not necessarily connected to that part. In the description of Figures 22 and 23, the frame hinge portion 92, including any sub-components, is described as being connected to a portion of the frame 2.

[0051] The coupling unit 95 of the hinge assembly 9 is described in some detail below. Details of the hinge assembly 9 are described in more detail in the applicant's co-pending patent application filed on even date herewith.

[0052] Coupling unit 95 is configured to allow selective coupling of at least the frame hinge portion 92 of hinge unit 91 to the top frame member 21 and optionally to one of the side frame members 22, 23. In the following, coupling unit 95 is described as comprising both a top frame coupling plate 96 and a side frame coupling plate 97. Alternative configurations are contemplated.

[0053] The top frame coupling plate 96 includes a base section 961 that is connected to an inner side of the top frame member 21. The top frame coupling plate 96 is connected to the top frame member 21 by a number of fastening means including at least one spigot 961c on the base section 961 and two bolt elements that also function as engagement pins 962, 963, each of which cooperates with an insert nut 982, 983 on the outer side of the top frame member 21. To accommodate the top frame coupling plate 96, the top frame member 21 includes a hinge assembly receiving milling 29a and a set of apertures 29c, 29e, the latter of which is a through aperture or hole.

[0054] The side frame coupling plate 97 includes a base section 971 and is connected to an inner side of the side frame member 22 by a plurality of fastening means including at least one spigot 971e in the base section 971 and at least one opening (not shown in detail) for fastening means such as a screw 981. To receive the side frame coupling plate 97, the side frame member 22 includes a hinge assembly receiving milling 29b and a set of openings 29d, 29f.

[0055] Operating Assembly - Figures 8 and 10 During normal use, i.e. when the roof window 1 is installed and a user wishes to place the sash 3 in the ventilation position, opening, closing and locking may be performed with the aid of an operating assembly, such as for example a manual hand winder or a screw jack as shown constituting the operating assembly 5.

[0056] Referring first to FIG. 8, the operating assembly 5 comprises a sash mounting fixture 55, a spindle portion 52 having a spindle 521 connected to the socket mounting fixture 51 via a nut portion 53, and a handle 522, the sash mounting fixture 55 being connected to the bottom sash member 34, and the socket mounting fixture 51 being connected to the bottom frame member 24 in the mounted state of the operating assembly such that upon relative rotation of the spindle portion 52 with respect to the nut portion 53, the bottom sash member 34 is moved relative to the bottom frame member 24.

[0057] In the embodiment shown, the roof window 1 may be provided in a supply state suitable for packaging and transport, with the sash fitting 55 being connected to the bottom sash member 34 of the roof window 1, whilst the spindle portion 52 with nut portion 53 and the socket fitting 51 are provided separately from the roof window 1.

[0058] The nut portion 53 includes a nut ring 531 connected, here by a set of bolts 532, to a set of flanges 512 that protrude from a base plate 511 of the socket fixture 51. The base plate 511 is provided with holes 513 for mounting the socket portion 51 to the bottom frame member 24.

[0059] The operating assembly 5 further includes a divider 56 associated with the sash mounting 55, the divider 56 being displaceable between an active position in which it engages a set of openings 553 in flanges 552 protruding from a base plate 551 of the sash mounting 55, and an inactive position to expose a receiving gap between the flanges 552 of the sash mounting 55.

[0060] The spindle portion 52 includes an end portion 54 that is configured to cooperate with a sash mounting fixture 55 in an attached state.

[0061] Sash and frame structure - Figures 5 to 16 As shown in the cross-sectional views of the bottom of the roof window 1 in Figures 8 and 9, the pane 4 comprises an outer sheet 41 and at least one inner sheet, here two inner sheets 42, 43 arranged in contact with each other. Here, the pane 4 is a so-called stepped pane, in which the outer sheet 41 comprises an extension portion 41a that extends beyond the bottom edge portions 42b of the inner sheets 42, 43 to the bottom edge portion 41b of the outer sheet 41. Now, referring also to Figures 4 and 5, which respectively show the side and top portions of the roof window 1, the pane 4 has a common side edge portion 4b - which also applies to the opposite side, not shown - and a common top edge portion 4c. Between the outermost inner sheet 42 and the outer sheet 41, spacers 47 are provided along all edges.

[0062] Common to all sash members 31, 32, 33, 34 of a sash 3 according to the invention is that each sash member comprises a profile element 31a, 32a, 34a, an inner element 31c, 32c, 34c, and an intermediate element 31b, 32b, 34b. Also not shown, but not shown in cross section, is of similar construction to side sash member 32 which is shown.

[0063] The intermediate elements 31b, 32b, 34b of the respective sash members 31, 32, 33, 34 form the connection between the profile element 31a, 32a, 34a and the inner element 31c, 32c, 34c of the sash member 31, 32, 33, 34 in question. The intermediate elements 31b, 32b, 34b of the sash members 31, 32, 33, 34 may in principle be formed the same for all four sash members or may be formed to have individual properties. Typically, however, the two side sash members 32, 33 of a sash 3 are designed with equal properties.

[0064] Referring also to Figure 12a, in the embodiment shown, the intermediate elements 31b, 32b, 33b of the two side sash members 32, 33 and the top sash member 31 are formed as a set of longitudinal profiles, while the intermediate element 34b of the bottom sash member 34 comprises a separate set of fittings which will be described in further detail in relation to Figures 14a-b. Details of each of the intermediate elements 31b, 32b, 33b, 34b will be described below.

[0065] The inner elements 31c, 32c, 33c, 34c of the sash members 31, 32, 33, 34 form a coherent inner element sash structure which supports the inner edge portions of the pane 4. That is, the edge portions of the pane 4 overlap the inner elements 31c, 32c, 33c, 34c when viewed from the inside. In this manner, the top edge portion 4c, side edge portion 4b and opposite side edge portion and bottom edge portion 42b of the inner sheet 42 are all disposed on the outer side of the coherent sash structure provided by the inner elements such that any spacers 47 and other elements present along the edge portions of the pane 4 are hidden from view by the inner elements 31c, 32c, 33c, 34c and thereby cannot be seen from the inside of the building. The inner elements 31c, 32c, 33c, 34c of the sash members 31, 32, 33, 34 may have substantially identical cross-sections and may be formed of any suitable material, for example wood, joined at the corners with mortise joints. It is also contemplated that the inner element structures may be formed as a fully coherent structure, for example by moulding.

[0066] Furthermore, as will be explained in more detail in relation to the embodiments below, the profile elements 31a, 32a, 33a, 34a of the sash members 31, 32, 33, 34 are arranged along respective outer edge portions of the pane 4, and the intermediate elements 31b, 32b, 33b, 34b of each sash member 31, 32, 33, 34 are provided with engagement means 32b3, 34b3 configured to form a structural connection with the inner elements 32c, 34c at one of at least two distinct positions in the height direction.

[0067] Also shown in Figures 5 and 6 are hinge assemblies 9 which reside in the gaps between the top sash member 31 and the top frame member 21, and between the side sash member 32 and the side frame member 22, thereby connecting the sash 3 to the frame 2 and providing a top-hung hinge connection.

[0068] For the frame 2 of the roof window 1, each frame member 21, 22, 23, 24 comprises a number of receiving structures at the interior, exterior, inner and / or outer side of the respective frame member, each receiving structure being configured to interact with an accessory device in the assembled state of the frame 2.

[0069] In the embodiment shown, the top frame member 21 and the two side frame members 22, 23 have substantially identical cross-sections.

[0070] 8 and 9, the bottom frame member 24 includes an outer piece 24a and a separate inner piece 24b. The outer piece 24a and the separate inner piece 24b may be formed from the same materials as the top frame member 21 and side frame members 22, 23, such as wood, or may be formed as a composite member including plywood and other materials.

[0071] A further feature of the roof window 1 in the embodiment shown is that the frame 2 comprises at least one releasable component configured to allow replacement with a different set of components to change the functionality of the roof window 1.

[0072] In the embodiment shown, one such releasable component includes a cover 24c that is releasably connected to and defines a cavity relative to the remaining components of the bottom frame member 24. The cover 24c may be formed from any suitable material, for example a profile element of a plastic or metal material.

[0073] Here, where the bottom frame member 24 includes an outer piece 24a and a separate inner piece 24b, the cavity defined by the cover 24c is defined in an outward direction by the inner side of the outer piece 24a, and is primarily defined by the outer side of the separate inner piece 24b, which is directed inward.

[0074] To obtain the releasable connection, edge portions 24c1, 24c2 of cover 24c are received in receiving grooves in bottom frame member 24, specifically one receiving groove 24a1 in outer piece 24a and one receiving groove 24b1 in separate inner piece 24b.

[0075] In the embodiment shown in which the roof window 1 is prepared for manual operation by an operating assembly 5, an insulating strip 24d is received in a cavity defined by the cover 24c.

[0076] In order to change the function of the roof window 1, the cavity defined by the cover 24c is configured to receive an electrical control body (not shown), and the cover 24c is configured to be replaceable with another cover (not shown) to allow the control means of the electrical control body to be connected to the sash 3.

[0077] It is also possible to envisage that the sash mounting 55 connected to the bottom sash member 34 could be adapted to selectively connect to such an electrical control body, in which case the sash mounting 55 would simply be reused for the operating means of the electrical control body.

[0078] It is likewise conceivable that the roof window 1 is provided with a bottom frame member 24 equipped with a dummy element arranged to be replaced by a socket fitting 51 of the operating assembly 5 .

[0079] Correspondingly, if the roof window 1 is provided in a basic form having a hinge different from the hinge assembly 9 described in the above embodiment, it is also conceivable to use a blind plate covering the hinge assembly receiving millings 29a, 29b to allow replacement of the previous hinge by the hinge assembly 9.

[0080] The first receiving structure comprises a lining groove 25 at the inner side of each frame member 21, 22, 23, 24. The lining groove 25 is configured to interact with a set of inner lining panels. Such lining panels typically form the transition between the roof window 1 and the inner wall. The bottom frame member 24 is provided with a first groove portion 25a in the outer piece 24a and a second groove portion 25b in the separate inner piece 24b. In the assembled state of the frame 2, the first and second groove portions 25a, 25b form the lining groove 25.

[0081] In the embodiment shown, each frame member 21, 22, 23, 24 includes an inwardly projecting portion 21i, 22i, 24i that, when viewed from the inside, at least partially overlaps the corresponding sash member 31, 32, 33, 34. This is possible because all parts of the sash 3 move outwardly when the sash 3 is opened relative to the frame 2.

[0082] The second receiving structure includes a sealing groove 26 on the outer side of the inwardly protruding portion 21i, 22i, 24i. The sealing groove 26 is configured to interact with a frame sealing profile 26p.

[0083] The third receiving structure comprises a first outer groove 27 on the outer side of the frame members 21, 22, 23, 24. The first outer groove 27 is configured to interact with the respective pieces 71, 72, 73, 74 of the insulation frame 7. The interaction can be achieved by introducing a longitudinal protrusion 78 of the insulation frame piece into the groove 27 or by the correct placement of a separate fastening means.

[0084] Taking again the user's perspective from the interior of the building, at the roof with the roof window 1 installed, it is also noted that the inwardly projecting portions 21i, 22i, 24i of each frame member 21, 22, 23, 24 have inwardly facing surfaces which together form a cohesive inwardly facing surface. As shown, this appearance mimics the corresponding cohesive inwardly facing surface of the sash 3.

[0085] The fourth receiving structure includes an interface unit groove 28 on the outer sides of the top frame member 21 and the two side frame members 22, 23. This interface unit groove 28 interacts with respective top and side elements 81, 82, 83 of the interface unit 8.

[0086] Further details visible in the drawings include guide element 22g (see Figure 7) and guide element 32g (see Figure 10) which ensure that the sash 3 is aligned relative to the frame 2 when closed so that any distortion caused by the sash 3 in the open position is removed. Visible in Figure 8 is a shielding mounting bracket 32s which allows an internal shielding device (not shown) to be attached to the sash 3 to provide shielding for the pane 4. The abutment element 22s provides a stop for the bottom sash member 34 when closed.

[0087] Details of the insulating frame 7 are also shown in these figures; as mentioned above, the insulating frame 7 includes a top piece 71, side pieces 72, 73, and a bottom piece 74. In the embodiment shown, each such insulating frame piece includes a projection 78 received at the outer side of the respective frame member, and a recess 75 for interacting with an attachment device in the form of an underroof collar, which is described in more detail in the applicant's co-pending patent application filed on the same day as the present application. With particular reference to FIG. 11, there is shown a recess 76 making a location for a mounting bracket 6 to be attached to the side frame member 23 of the frame 2, and a fold line 77 allowing folding of a portion of the side piece 73 of the insulating frame 7 to allow access to the outer side of the side frame member 23. At least the side pieces 72, 73 of the insulating frame 7 are provided with such recess 76 and fold line 77 at or near the location of the intended location of the mounting bracket 6 of the set of mounting brackets to be mounted to the roof window 1. The insulating frame 1 can in principle be made of any material having suitable insulating properties. It is currently preferred to use a foamed material, such as polyethylene foam.

[0088] Intermediate elements - Figures 5-16 Turning now to a description of the connections between the elements of the sash 3, firstly the engagement between the intermediate elements 31b, 32b, 33b and the respective inner elements 31c, 32c, 33c of the top sash member 31 and the two side sash members 32, 33 will be described.

[0089] With particular reference to FIG. 16, the outer side of each inner element, here shown as inner element 32c of the side sash member 32, is provided with receiving means configured to receive the engagement means of the intermediate element 32b of the side sash member 32.

[0090] In the embodiment shown, the receiving means comprises two longitudinally extending grooves 32c1, 32c2 spaced from one another in the height direction and which open in the outward direction of the roof window 1.

[0091] In the embodiment shown, the longitudinal profiles forming the intermediate elements 31b, 32b, 33b have a uniform cross section and can in principle be cut from one and the same profile length. The longitudinal profiles are preferably formed by a continuous molding process such as extrusion or pultrusion. In particular, they are formed by pultrusion of a composite material incorporating resin and glass fibers.

[0092] Therefore, only one of these intermediate elements, namely intermediate element 32b, will be described in detail. Referring now to Figure 15, intermediate element 32b comprises a base portion 32b1 extending substantially in the height direction in the assembled state of the sash 3, and a head portion 32b2 extending obliquely relative to the base portion 32b1. The base portion 32b1 is provided with engagement means on its surface which faces inwards in the assembled state and which faces the outer surface of the inner element 32c, as shown in Figure 16. The position, location and length of the individual intermediate elements 31b, 32b and 33b can also be seen from Figures 3, 4, 5, 10 and 12a.

[0093] In the embodiment shown, the engagement means of the base portion 32b1 of the intermediate element 32b is formed as a flange 32b3 extending over the entire length of the profile and includes a protruding portion configured to engage with a selected one of the grooves 32c1, 32c2 of the inner element 32c of the side sash member 32.

[0094] The base portion 32b1 of each intermediate element 32b includes a stepped section 32b4 that is offset inwardly relative to the remainder of the base portion 32b1 by an offset bend 32b5. An engagement means, here a flange 32b3, is provided on the stepped section 32b4.

[0095] Additional fastening means 30x (see Figures 12a and 16) are provided for fastening one or more intermediate elements 32b to the inner element 32c of the side sash member 32. To receive the additional fastening means 30x, the base portion 32b1 of the intermediate element 32b is provided with an opening 32b6, i.e. in the stepped section 32b4, configured to receive the additional fastening means 30x.

[0096] 14a and 14b, the connection between the inner element 34c and the middle element 34b of the bottom sash member 34 will now be described in detail.

[0097] Similar to the intermediate elements 31b, 32b, 33b described above, the intermediate element 34b includes a base portion 34b1 extending substantially in the height direction and a head portion 34b2 extending obliquely relative to the base portion 34b1. The base portion 34b1 is provided with an engagement means 34b3 on its inner surface facing the outer surface of the inner element 34c. The engagement means of the base portion 34b1 includes a protruding portion 34b3 for engaging with a selected one of the grooves 34c1, 34c2 of the inner element 34c of the bottom sash member 34. An additional fastening means 30y is provided at an opening 34b6 in the stepped section 34b4, which is offset inwardly by offsetting the bent portion 34b5 relative to the remaining section of the base portion 34b1, to secure the intermediate element 34b to the inner element 34c of the bottom sash member 34.

[0098] In the embodiment shown, the intermediate element 34b of the bottom sash member 34 includes a set of fittings. There may be two such sets provided along the length of the bottom sash member 34.

[0099] Each set of fittings includes a connecting fitting provided with engagement means configured to form a structural connection with the inner element 34c at one of at least two different positions in the height direction. The connecting fitting comprises a first mounting part 34b0 and a second mounting part 34b10. The first mounting part 34b0 comprises the engagement means and the second mounting part 34b10 is configured to be connected to the first mounting part 34b0 and to act as a spacer between the outer peripheral surface of the inner element 34c of the bottom sash member 34 and the first mounting part 34b0. To connect the first and second mounting parts 34b0, 34b10 to each other, the second mounting part 34b10 is provided with at least one resilient hook 34b11 configured to interact with a corresponding opening 34b12 in the first mounting part 34b0. The head portion 34b2 of the intermediate element 34b of the bottom sash member 34 is received in a slit 34a5 in the inner portion 34a2 of the profile element 34a of the bottom sash member 34 in the assembled state of the sash 3.

[0100] Comparative Example - Figures 17 and 18 Turning now to Figures 17 and 18, which show a simplified overview of the main components of the side sash member 32, it can be seen how the same components of the sash 3 can accommodate two different thicknesses of the pane 4. This is done by changing the position of the engagement means of the intermediate element 32b from the first groove 32c1 to the second groove 32c2. This requires a slightly adapted side frame member 22c. The intermediate elements 31b, 33b, 34b in the other sash members 31, 33, 34 are moved similarly.

[0101] Profile Elements - Figures 19-21 Focusing now on the profile elements of the sash 3. The general arrangement of the profile elements 31a, 32a and 33a of the top and side sash members 31, 32, 33 is shown in perspective views in Figures 3 to 6 and 10, whilst details are shown in cross section in Figure 16. The profile element 34a of the bottom sash member 34 is most clearly shown in Figures 12a to 14b.

[0102] Corresponding to the above, only the profile element 32a of the side sash member 32 is described in the representation of the longitudinal profiles of the top sash member 31 and the two side sash members 32, 33, because in the embodiment shown, these profile elements are formed as a set of longitudinal profiles of substantially uniform cross-section.

[0103] Details common to all profile elements 31a, 32a, 33a, 34a are as follows: Each profile element 32a, 34a includes a head portion 32a1, 34a1 and adjacent outer portions 32a3, 34a3.

[0104] The head portions 32a1, 34a1 are substantially parallel to the plane of the roof window 1 in the assembled state of the roof window 1, and the adjacent outer portions 32a3, 34a3 are substantially perpendicular to the head portions 32a1, 34a1.

[0105] However, the head portion 32a1 of the profile element 32a of each of the top and side sash members 31, 32, 33 is located on the outer side of the outer pane surface 4e and on the outer sides of the top edge portion 4c and side edge portion 4b of the pane 4, while the head portion 34a1 of the profile element 34a of the bottom sash member 34 is located on the inner side of the extended portion 41a of the outer sheet 41 of the pane 4.

[0106] The profile element 32a of the side sash member 32 and the profile element 34a of the bottom sash member 34 are thus separated by a layer of glass; an overlap is nevertheless provided by selecting the length of the profile elements 32a, 33a of the two side sash members 32, 33 to substantially correspond to or slightly exceed the distance between the top edge portion 4c of the pane 4 and the bottom edge portion 41b of the outer sheet 41 of the pane 4. The length of the profile element 34a of the bottom sash member 34 is suitably selected to extend substantially to the side edge portion 4b of the pane 4.

[0107] The length of the profile element 31a of the top sash member 31 is selected based on the dimensions of the pane 4 and the desired manner of joining the profile element 31a to the profile elements 32a, 33a. In the embodiment shown, the longitudinal profiles form mitred joints between the profile element 31a of the top sash member 31 and the profile elements 32a, 33a of the side sash members 32, 33, respectively, in the assembled state of the sash 3, see FIG.

[0108] Also visible in Figures 12a-13b are end plugs 38 which close the profile element 32a of the side sash part 32. The end plugs 38 are provided with ribs which increase friction and with snap arms which will not be described in detail. The rungs 45 are provided with corresponding end plugs. Furthermore, a trailing element 37 is provided to drain condensed water to the profile element sealing 34p.

[0109] To ensure a strong bond at the miter joints, each miter joint is provided with a corner key 39, see Figures 19-21. During manufacture, a sealant 39b is preferably applied, as will be described in more detail below with particular reference to Figures 19-21.

[0110] Corner key 39 has a generally L-shaped configuration having two vertical legs 39a1 separated by grooves 39a2. Grooves 39a2 are provided with a set of primary openings 39a3.

[0111] Additionally, each leg 39a1 is adjacent on a first side a depending skirt 39a4 in which a secondary opening 39a5 is provided.

[0112] To match the profile of the profile elements 31a, 32a, 33a, each leg 39a1 adjoins on a second side an inclined section 39a6.

[0113] As shown in Figures 20 and 21, groove 39a2 terminates in a tongue 39a7, optionally adjacent to an angled groove section 39a8.

[0114] The profile elements 31a, 32a, 33a are suitably configured to receive the pane 4 in an upside-down position, i.e. with their respective head portions 32a1 facing a substrate such as an assembly table. This step of the assembly of the sash 3 can be performed after the intermediate elements 31b, 32b, 33b have been introduced into the respective profile elements 31a, 32a, 33a. Also visible in Figures 16 and 19 are the pane clips 4t, which are positioned at an appropriate distance from each other along the top edge portion 4c and the side edge portion 4b of the pane 4. In the embodiment shown, the interaction between the main components of the sash 3 is defined by the following arrangement of the components: Each of the longitudinal profiles forming the profile elements 31a, 32a, 33a of the top sash member 31 and the two side sash members 32, 33 comprises an inner portion 32a2 adjacent to the head portion 32a1, the dimensions of which are chosen such that in the assembled state of the sash 3, the inner portion 32a2 overlaps the pane 4.

[0115] The head portion 32a1 of each profile element 31a, 32a, 33a is configured, in the assembled state of the sash 3, to project outwardly relative to the outer face 4e of the pane.

[0116] The inner portion 32a2 is inclined from the head portion 32a1 relative to the head portion 32a1 and extends inwardly and inwardly towards the outer face 4e of the pane in the assembled state of the sash 3.

[0117] The inner portion 32a2 is adjacent to a first bend 32a4 that is configured to be located at or near the outer surface 4e of the pane.

[0118] For example, as shown in Fig. 16, a second bent portion 32a5 is provided, the function of which is to accommodate the sealing 4p against the outer face 4e of the pane.

[0119] A third bent portion 32a6 is also provided, said third bent portion 32a6 being configured to receive an inner edge portion 32b9 of the intermediate element 32b against the inner side of the inner portion 32a2. For details of the intermediate element 32b, see FIG.

[0120] A transition portion 32a7 is provided between head portion 32a1 and inner portion 32a2. Transition portion 32a7 is configured to receive raised portion 32b7 of intermediate element 32b.

[0121] The fourth bent portion 32a8 is provided adjacent the outer portion 32a3 of the profile element 32a and is configured to receive the outer edge portion 32b12 of the intermediate element 32b.

[0122] The inner portion 32a2 of the profile element 32a is configured to be arranged opposite the inner inclined portion 32b8 of the intermediate element 32b in the assembled state of the sash 3.

[0123] Finally, the outer edge portion 32b12 of the intermediate element 32b is associated with the head portion 32b2 of the intermediate element 32b via the outer angled portion 32b11 and the bend 32b10.

[0124] Overall, the configuration of the described embodiment makes it possible to provide a secure engagement between the intermediate elements 31b, 32b, 33b and the profile elements 31a, 32a, 33a.

[0125] The length of the intermediate elements 32b, 33b of the side sash members 32, 33 may be chosen to be slightly shorter than the associated profile elements 32a, 33a.

[0126] In the bottom sash member 34, the head portion 34a1 of the profile element 34a is provided with at least one longitudinally extending groove 34a4 for receiving a respective sealing strip 4s. These sealing strips 4s may be formed by silicone so as to form an adhesive connection between the profile element 34a and the extended portion 41a of the outer sheet 41 of the pane 4. A masking 44 may be provided on the extended portion 41a at the inner side of the outer sheet 41.

[0127] As mentioned above, the intermediate element 31b, 32b, 33b, 34b of each sash member 31, 32, 33, 34 includes engagement means 32b3, 34b3 configured to form a structural connection with the inner element 31c, 32c, 33c, 34c. To also secure the intermediate element 34b of the bottom sash member 34 to the profile element 34a, the head portion 34b2 of the intermediate element 34b is configured to be received in a slit 34a5 of the inner portion 34a2 of the profile element 34a of the bottom sash member 34 in the assembled state of the sash 3, see figures 14a-b. To increase the strength of the inner portion 34a2, this portion may be formed as a double layer turn-up portion.

[0128] The manufacture of the sash 3 can in principle be carried out in any suitable manner. In the following one currently preferred method is described: In a first step, a set of three longitudinal profiles is provided. The longitudinal profiles may, for example, form a single profile length of extrusion material, such as metal, e.g., aluminum, etc. Other materials and manufacturing processes are also contemplated, including roll forming of steel or other metals, or composite materials.

[0129] Secondly, miter shapes are formed at the opposing ends of the longitudinal profiles. Where the longitudinal profiles are formed from a single length, and where convenient, the miter shapes may be formed in a coherent length by appropriately shaped cuts to form inside corners at the intersections between the top and sides.

[0130] A pane of suitable dimensions is provided, for example as described above.

[0131] Such sets of four inner elements and four intermediate elements are provided, for example, as described above.

[0132] The longitudinal profiles are placed in an upside-down position on the assembly table to form a profile element frame structure constituting three sides of a rectangle, typically by means of guide elements which can be fixed to the assembly table which correspond to the periphery of the sash.

[0133] The panes are placed in a profile element frame structure, which is connected to the inner elements, optionally via intermediate elements, to form the sash. During this procedure, the intermediate elements at the top and sides are typically inserted into the mating profile elements. As mentioned above, the inner elements may be connected to each other to form an inner element frame structure that is placed on the panes, and then the intermediate elements are connected to the respective inner elements.

[0134] 19 to 21, a set of two corner keys 39 is advantageously provided in the longitudinal profile elements 31a, 32a, 33a at their mitered ends facing each other before placing the pane 4 in the profile element frame structure. A sealant 39b is preferably applied to each corner key 39. During assembly, it is ensured that the sealant 39b can flow through the primary openings 39a3 of the corner keys 39 so that the sealant 39b is distributed.

[0135] In the embodiment shown, each corner key 39 is configured to be mechanically connected to the respective adjacent profile element 31a, 32a, 33a. This can be done by clinching, for example by the TOX® technique.

[0136] In embodiments in which the roof window 1 comprises one or more runners, such as runner 45, the runner or runners are aligned on an assembly table before placing the pane 4 in the profile element frame structure. The runner 45 is provided with one or more adhesive strips 45a for fastening it to the outer face 4e of the pane 4.

[0137] Sealing Assembly and Interface Unit - Figures 24 to 36 24-29a, there is shown an embodiment in which a roof window 1 is provided with a cover assembly 10. Details of the cover assembly 10, generally including a flashing assembly and any other ancillary equipment, are described in more detail in applicant's co-pending patent application filed on the same day as the present application.

[0138] In the following there will be described a sealing assembly of the roof window 1. Some details of the sealing assembly have also been given above.

[0139] The sealing assembly generally comprises a set of sealing profiles.

[0140] In the embodiment shown, the sealing between the sash 3 and the frame 2 is provided by an outer sealing surface, an intermediate sealing surface and an inner sealing surface. Reference is also made to the cross-sectional views of the top, side and bottom of the roof window 1 shown and described above.

[0141] The interior sealing surface includes a frame sealing profile 26p provided on the exterior side of each frame member 21,22,23,24 and interacting with the interior side of the respective sash member 31,32,33,34.

[0142] The intermediate sealing surface includes a sash sealing profile 30p1 provided on an outer side of each sash member 31, 32, 33, 34 and interacts with an inner side of the respective frame member 21, 22, 23, 24. The sash sealing profile 30p1 is provided in a sash sealing groove 30g1.

[0143] At the bottom side an external sealing surface is provided such that a profile element sealing 34p in the profile element 34a of the bottom sash member 34 contacts the outer side of the bottom frame member 34 in the closed position of the sash 3.

[0144] At the top and sides, the external sealing surfaces are defined by interface elements 81, 82, 83. With particular reference to Figures 26 and 27, the similarities and differences between the top interface element 81 in the illustrated embodiment and the side interface element, here represented by interface element 82, will be described: Each interface element 81, 82 comprises a base portion 80 having an anchor section 801, an inner leg 86, an outer leg 87, a flange 88 and a sealing portion 89. The anchor section 801 of the base portion 80 is received in the interface unit groove 28 in the assembled state of the roof window 1. The sealing portion 89 faces externally and interacts with the top sash member 31 and side sash members 32, 33 when the sash 3 is opened or closed and when the sash 3 is in a closed position.

[0145] The inner leg 86, outer leg 87, and flange 88 together form grooves 810, 820 in the top interface element 81 and side interface element 82. Corresponding grooves are formed in the other side interface element 83. In this manner, water from rain or other precipitation may be channeled from groove 810 in the top interface element 81 to grooves 820 in the side interface elements 82, 83 and further into the cover assembly 10 (not shown in detail).

[0146] Common to both the top interface element 81 and the side interface element 82 in the illustrated embodiment is that the sealing portion 89 comprises an inner sealing lip 891 and an outer sealing lip 892. The inner sealing lip 891 of both the top interface element 81 and the side interface element 82 is provided sufficiently inboard such that the inner sealing lip 891 interacts with the interior of the side sash member 32 and the top sash member 31, see Figures 6 and 5; however, the outer sealing lip 892 of the top interface element 81 is located on the outer side of the top sash member 31. In the illustrated embodiment, this is because the flange 88 of the top interface element 81 is longer than the corresponding flange of the side interface element 82. It is noted that although at least the sealing portion 89 of each interface element 81, 82, 83 is formed to be elastic, i.e. as is customary in sealing, the sealing portion 89 can be deformed when in contact with another component and then elastically return to its original shape when relaxed, this is not reflected in the figures, since they show the elements generally in their undeformed state. In general, at least the sealing portion 89 has different properties than at least the base portion 80. This can be provided by co-extrusion or co-molding of two (or more) different materials.

[0147] To ensure a firm interaction at the top of the roof window 1, the top interface element 81 is provided with an additional inner sealing lip 893, a first additional outer sealing lip 894 and a second additional outer sealing lip 895, see also FIG.

[0148] In the embodiment shown, interface elements 81, 82, 83 further enable interaction with cover assembly 10 in that base portion 80, inner leg 86 and flange 88 form a flashing reception groove 85. Flashing reception groove 85 has a groove opening 85b and is provided with a plurality of protrusions 85a.

[0149] The sealing assembly further comprises a pane sealing 30p2 that is received in the pane sealing groove 30g2. It is noted that the pane sealing 30p2 remains stationary relative to the sash 3.

[0150] An alternative embodiment will now be described in detail with reference to Figures 29b to 36. Only the differences to the embodiment described above will be described in detail.

[0151] In FIG. 29b, a foam element 32f is shown to be present in the sash side member 32. A similar foam element may also be present in the opposite sash side member 33. The longitudinal extension of the foam element 32f may be such that it extends over most of the length of the sash side member 32. The foam element 32f abuts the inner side of the head portion 32b2 of the intermediate element 32b along the extent of the intermediate element 32b. The portion of the foam element 32f that projects beyond the longitudinal end of the intermediate element 32b is allowed to extend towards the inner side of the head portion 32a1 of the profile element 32a of the side sash member 32. The foam element 32f has typical weather shielding properties.

[0152] In FIG. 30, a stabilizing plate 310x is arranged in the groove 810 of the top element 81 of the interface unit 8 to improve the structural properties. Furthermore, an extension plate 310y is shown fixed to the profile element 31a of the top sash member 31 so as to protrude into the groove 810. The extension plate 310y is for improving the guidance of precipitation into the groove 810 and further towards the side of the roof window. This is particularly relevant for roof windows installed in roofs with high slopes. The relative positions of the stabilizing plate 310x and the extension plate 310y are shown more clearly in FIG. 32. To make it easier to read the relevant parts of the interface unit 8, FIG. 33 shows the top element 81 of the interface unit 8 without the stabilizing plate 310x and without the sash 3 including the extension plate 310y.

[0153] FIG. 31 shows the interaction between the bottom of the roof window 1 and the cover assembly 10.

[0154] Finally, Figure 34 shows a view of the lower right corner of a roof window 1, in which the sash 3 has been slightly raised relative to the frame 2 for clarity.

[0155] Here, clip 22x is attached to side element 82 of interface unit 8. Clip 22x is provided with clip flange 22xa, as shown in detail in Figure 35. Figure 36 shows end plug 38 of sash side member 32, in this embodiment provided with end plug flange 38a. In the closed position of the roof window 1, end plug flange 38a overlaps clip flange 22xa.

[0156] In general, the components of the roof window can be easily disassembled and each component may in principle be reused, recycled by appropriate environmentally responsible disposal means or may be material recovered for other uses. [Explanation of symbols]

[0157] List of reference numbers 1 Roof Window 2 Frames 21 Top frame member 21i Inner protrusion 22 Side frame member 22c Suitable side frame material 22g Guide Elements 22i Inward protruding part 22s Contact element 22x Clips 22xa Clip flange 23 Side frame member 24 Bottom frame member 24a Outer piece of bottom frame member 24a1 receiving groove 24b Separate inner piece of bottom frame member 24b1 receiving groove 24c cover 24c1 Edge part 24c2 Edge part 24d Insulation strip 24i Inward protruding part 25 Lining groove 25a 1st groove part 25b 2nd groove part 26 Sealing groove 26p Frame Sealing Profile 27 First outer groove 27b 2nd outer groove 28 Interface unit groove 29a Hinge assembly receiving milling section 29b Hinge assembly receiving milling section 29c aperture 29d aperture 29e Through opening 29f opening 3 Sash 30g1 Sash sealing groove 30p1 sash sealing profile 30g2 pane sealing groove 30p2 Pain Sealing 30x fixing means 30y fixing means 31 Top sash components 31a Profile element of top sash member 31b Intermediate element 31c inner element 310x Stabilizing Plate 310y extension plate 32 Side sash components 32a Profile elements of side sash members 32a1 Head part 32a2 inner part 32a3 outer part 32a4 First bend 32a5 Second bend 32a6 Third bend 32a7 Transition 32a8 4th bend 32b Intermediate element 32b1 Base part 32b2 Head part 32b3 Engagement means / protrusion / flange 32b4 stepped section 32b5 offset bend 32b6 opening 32b7 Raised part 32b8 Inner slope part 32b9 Inner edge part 32b10 Bending part 32b11 Outer slope part 32b12 Outer edge part 32c inner element 32c1 Receiving means / first groove 32c2 Receiving means / second groove 32f Foam element 32g Guide Elements 32s Shielded Mounting Bracket 33 Side sash components 33a Profile elements of side sash members 33b Intermediate element 33c inner element 34 Bottom sash member 34a Profile element of bottom sash member 34a1 Head part 34a2 inner part 34a3 outer part 34a4 Groove in head portion 34a1 34a5 Slit in inner portion 34a2 34b Intermediate elements 34b0 First mounting part of the connection fitting 34b1 Base part 34b2 Head part 34b3 Engagement means / protruding part 34b4 stepped section 34b5 offset bend 34b6 opening 34b10 Second mounting part of connecting fixture 34b11 Elastic hook 34c inner element 34c1 Receiving means / first groove 34c2 Receiving means / second groove 34p Profile element sealing 37 Trailing Elements 38 End plug 38a End plug flange 39 Corner Key 39a1 Legs 39a2 groove 39a3 Primary aperture 39a4 Dependent skirt 39a5 Secondary opening 39a6 Inclined Section 39a7 Tongue 39a8 Inclined Groove Section 39b Sealing material 4 Panes 41 External Sheet 41a Extension 41b Bottom edge of outer sheet 42 Inner Sheet 42b Bottom edge of inner sheet 43 additional interior sheet 44 Masking 45 Crosspiece 45a adhesive tape 46 Crosspiece Cover Element 47 Spacer 4b Side edge of pane 4c Top edge of pane 4e Outer surface of pane 4i-pane interior surface 4p Ceiling (Pain) 4s sealing strip (pane) 4t Pain Clip 5 Operation Assembly 51 Socket attachment 511 Socket mounting base plate 512 Socket fitting flange 513 holes 52 Spindle section 521 Spindle 522 Handle 53 Nut part 531 Nut ring 532 Volts 54 End part 55 Sash mounting fixture 551 Base plate for sash mounting fixture 552 Flange for sash mounting fixture 553 Aperture 56 Division 6 Mounting bracket 61 First bracket leg 614 Bending section 62 Second bracket leg 620 aperture 621 Section 1 624 First engagement means / flange 625 Hinge connection 626 Second Section 629 Second engagement means / flange 7 Insulation Frame 71 Top piece of insulation frame 72 Insulation frame side piece 73 Insulation frame side piece 74 Bottom piece of insulation frame 75 Depression 76 Recess 77 Broken Line 78 Protrusion 8 Interface Unit 80 Base part 801 Anchor Section 81 Top element of the interface unit 810 Groove in top interface element 82 Side elements of the interface unit 820 Groove in Side Interface Element 83 Side elements of the interface unit 85 Flushing groove 85a Protrusion 85b Groove opening 86 Medial leg 87 Outer leg 88 Flange 89 Sealing part 891 Inner sealing lip 892 Outer sealing lip 893 additional inner sealing lip 894 1st additional outer sealing lip 895 2nd additional outer sealing lip 9 Hinge Assembly 91 Hinge unit 92 Frame hinge part 93 Sash hinge part 94 Hinge pin 95 Coupling unit 96 Top frame coupling plate 961 Bass Section 961c Spigot 962 Bolt / Engagement Pin 963 Bolt / Engagement Pin 97 Side frame coupling plate 971 Bass Section 971e Spigot 981 Screw 982 Insert Nut 983 Insert Nut 10 Cover Assembly

Claims

1. A roof window (1) comprising a frame (2), a sash (3), and a pane (4), The frame (2) comprises a set of frame members including a top frame member (21), two side frame members (22, 23), and a bottom frame member (24), and the sash (3) comprises a set of sash members including a top sash member (31), two side sash members (32, 33), and a bottom sash member (34), and each frame and each sash member has a defined longitudinal direction. The pane (4) comprises an outer sheet (41) and at least one inner sheet (42, 43), and the pane (4) comprises an outer pane surface (4e) and a plurality of edge portions. The plane of the roof window (1) is determined by the outer side of the outer sheet (41) of the pane (4), and the height direction of the members of the frame (2) and the sash (3) is substantially perpendicular to the plane and extends from the inside to the outside of the roof window (1). Each sash member (31, 32, 33, 34) comprises a profile element (31a, 32a, 33a, 34a), an inner element (31c, 32c, 33c, 34c), and an intermediate element (31b, 32b, 33b, 34b) that forms a connection between the profile element and the inner element of each sash member. The inner elements (31c, 32c, 33c, 34c) of the sash members (31, 32, 33, 34) form a cohesive inner element sash structure that supports the inner edge portion of the pane (4). The profile elements (31a, 32a, 33a, 34a) of the sash members (31, 32, 33, 34) are arranged along the respective outer edge portions of the pane (4). Each sash member (31, 32, 33, 34) has an intermediate element (31b, 32b, 33b, 34b) which is provided with engaging means (32b3, 34b3) configured to form a structural connection with the inner element at one of at least two different positions in the height direction. Each intermediate element (31b, 32b, 33b, 34b) comprises a base portion (32b1, 34b1) substantially extending in the height direction and a head portion (32b2, 34b2) extending diagonally with respect to the base portion, and the base portion (32b1, 34b1) is provided together with the engaging means (32b3, 34b3) on the inner surface facing the outer surface of the inner element (31c, 32c, 33c, 34c). The intermediate element (34b) of the bottom sash member (34) comprises at least one set of mounting fixtures (34b0, 34b10), The head portion (34b2) of the intermediate element (34b) of the bottom sash member (34) is configured to be received in the slit (34a5) of the inner portion (34a2) of the profile element (34a) of the bottom sash member (34) when the sash (3) is assembled. A roof window (1) characterized by the following:

2. The roof window (1) according to claim 1, wherein the outer sides of each inner element (31c, 32c, 33c, 34c) are provided together with receiving means (32c1, 32c2; 34c1, 34c2) configured to receive the engaging means (32b3, 34b3) of the intermediate elements (31b, 32b, 33b, 34b) of each of the sash members (31, 32, 33, 34).

3. The receiving means comprises at least two longitudinally extending grooves (32c1, 32c2; 34c1, 34c2) spaced apart from each other in the height direction, and the grooves open outward from the roof window (1), as described in claim 2.

4. The roof window (1) according to claim 1 or 3, wherein the engaging means (32b3, 34b3) of the base portion (32b1, 34b1) of the intermediate element (31b, 32b, 33b, 34b) comprises a protruding portion (32b3, 34b3) configured to engage with a selected groove (32c1, 32c2; 34c1, 34c2) of the inner element (31c, 32c, 33c, 34c) of the sash member (31, 32, 33, 34).

5. The roof window (1) according to claim 4, wherein additional fixing means (30x) are provided to fix the one or more intermediate elements (32b, 34b) to the inner elements (32c, 34c) of each of the sash members (31, 32, 33, 34).

6. The roof window (1) according to claim 1, wherein the base portion (32b1, 34b1) of each intermediate element (31b, 32b, 33b, 34b) comprises a stepped section (32b4, 34b4), the stepped section (32b4, 34b4) being offset inward relative to the rest of the base portion (32b1, 34b1) by an offset bend (32b5, 34b5), and the engaging means (32b3, 34b3) is provided on the stepped section (32b4, 34b4).

7. The roof window (1) according to claim 1, wherein the base portion (32b1, 34b1) of each intermediate element (31b, 32b, 33b, 34b) comprises one or more openings (32b6, 34b6) configured to receive additional fastening means (30x), and the openings (32b6, 34b6) are optionally provided in the stepped section (32b4, 34b4).

8. The roof window (1) according to claim 1, wherein the intermediate elements (31b, 32b, 33b) of the top sash member (31) and the two side sash members (32, 33) are formed as a set of longitudinal profiles.

9. The roof window (1) according to claim 8, wherein the engaging means (32b3) of the intermediate elements (31b, 32b, 33b) of the set of longitudinal profiles is formed as a flange (32b3) extending along the entire length of the profile.

10. The roof window (1) according to claim 8 or 9, wherein the intermediate elements (31b, 32b, 33b) of the set of longitudinal profiles have a uniform cross-section.

11. The roof window (1) according to claim 10, wherein the set of longitudinal profiles is formed by a continuous molding process such as extrusion or pultrusion, and the longitudinal profiles are formed in particular by pultrusion of composite materials.

12. The roof window (1) according to claim 1, wherein each set of mounting fixtures (34b0, 34b10) is provided with at least one connecting fixture (34b0) configured to form a structural connection with the inner element (34c) at one of at least two different positions in the height direction.

13. The roof window (1) according to claim 12, wherein the at least one connecting fitting comprises a first mounting portion (34b0) and a second mounting portion (34b10), the first mounting portion (34b0) comprising the engaging means, and the second mounting portion (34b10) connected to the first mounting portion (34b0) and configured to function as a spacer between the outer surface of the inner element (34c) of the bottom sash member (34) and the first mounting portion (34b0).

14. The roof window (1) according to claim 13, wherein the second mounting portion (34b10) is provided together with at least one elastic hook (34b11) configured to interact with a corresponding opening (34b12) in the first mounting portion (34b0).

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