Patent Description:
Document GB <NUM> A A. <NUM> discloses such a roof window.

Roof windows to be installed in inclined roof surfaces come in a variety of types. When selecting a roof window type for a specific installation location in a building, parameters such as operability, thermal properties, weather-tightness, and suitable finishing to the interior of the building are typically given substantial weight; however, it is also often desired and in some areas in fact necessary to factor in the external appearance as well. This applies in particular when installing roof windows in conservation areas, in which building regulations may demand that the roof windows meet standard or local requirements. Thus, certain requirements apply whether the installation concerns a newly fitted roof window, or to replace an existing window or rooflight as part of a renovation or refurbishment project.

While the windows or rooflights of past times were typically made of cast iron with single glass pane pieces, separated by one or more cast iron glazing bars, the thermal efficiency left room for improvement. To fulfil the energy performance required by modern day building regulations, conservation roof windows are typically provided with an insulating pane, while at the same time setting out to mimic the look of traditional rooflights.

In many installation situations it is a further requirement that the conservation roof window is able to be installed with a "low profile", i.e. that the height of the parts of the roof window protruding above the surrounding roofing is as small as possible. This is particularly pronounced in buildings with substantially flat roofing materials, such as slate or shingle. To meet this requirement, most major roof window manufacturers allow installation in at least two levels, thus accommodating the height of various roofing profiles and installation conditions.

With an ever-increasing awareness of environmental considerations and the wish to reduce or even eliminate the climate footprint of products, there is furthermore a need for providing products which are more environmentally friendly in terms of manufacturing, supply, installation, and use.

Taking all of the above requirements into account, it is an ongoing quest to improve fitting and operating assemblies for a roof window for conservation purposes.

With this background, it is an object of the invention to provide a roof window, which provides for safer and less resource demanding transportation.

This and further objects are achieved with a roof window according to claim <NUM>. In a supply condition of the roof window, the sash fitting is connected to the bottom sash member of the roof window whereas the spindle part with the nut part and the socket fitting are provided separately from the roof window.

By providing only parts of the operating assembly connected to the sash, not only is protection of the remaining parts of the operating assembly achieved, but also a considerable reduction of the packaging volume.

In a presently preferred embodiment, the nut part comprises a nut ring connected to a set of flanges protruding from a base plate of the socket fitting, preferably by means of a set of bolts. The nut ring makes it possible to accommodate the spindle in a way that allows adjustment of the position.

It is preferable that the operating assembly comprises a split associated to the sash fitting, the split being displaceable between an active position in which it is in engagement with a set of openings in a set of flanges protruding from a base plate of the sash fitting and an inactive position to reveal a reception gap between the flanges of the sash fitting. In this way, engagement and disengagement of the spindle part is made particularly easy.

In a further embodiment, the spindle part comprises an end portion configured to cooperate with the sash fitting in the mounted condition of the operating assembly, the spindle part preferably comprises a handle. This provides for a simple, yet mechanically reliable structure.

Advantageously, the end portion of the spindle part is provided with an opening configured to cooperate with the split in the mounted condition of the operating assembly. This is an easy and well-functioning solution to the connection issue.

In a further embodiment, the socket fitting is provided with at least one guide protrusion configured to be accommodated in at least one corresponding guiding hole of the bottom frame member in the mounted condition of the operating assembly. This ensures correct positioning of the operating assembly and also improves the load transfer properties.

In the supply condition of the roof window, a transportation fitting is connected to the sash fitting and to the bottom frame member such that the sash is held stationary relative to the frame. This measure improves the transportation and handling conditions to a large extent.

It is advantageous that the transportation fitting comprises a base portion configured to abut an inner side of the bottom frame member and an anchor portion with an aperture cooperating with the split associated with the sash fitting in the supply condition of the roof window, wherein the anchor portion preferably extends substantially perpendicularly to the base portion. In this way, a safe and reliable connection is ensured.

Preferably, the transportation fitting comprises an inclined portion forming a transition between the base portion and the anchor portion. This makes it easier to accommodate the transportation fitting.

To ensure simple and fast assembly during manufacture, it is advantageous if the base portion is provided with at least one guide protrusion cooperating with at least one corresponding guiding hole of the bottom frame member in the supply condition of the roof window.

In order to improve the retention, the base portion may be provided with a hole configured to receive fastening means such as a screw to provide the connection of the transportation fitting to the bottom frame member.

A feature described in relation to one of the aspects may also be incorporated in the other aspect, and the advantage of the feature is applicable to all aspects in which it is incorporated.

In the following description embodiments of the invention will be described with reference to the drawings, in which.

In the following detailed description, a preferred embodiment of the present invention will be described. However, it is to be understood that features of the different embodiments are exchangeable between the embodiments and may be combined in different ways, unless anything else is specifically indicated. It may also be noted that, for the sake of clarity, the dimensions of certain components illustrated in the drawings may differ from the corresponding dimensions in real-life implementations.

It is noted that terms such as "up", "down", "left-hand", "right-hand", "exterior", "interior", "outer", "inner" are relative and refers to the viewpoint in question. In general, when referred to an exterior side, this relates to a side of a roof window in the mounted condition facing the outdoors or external side of the building. Conversely, an interior side refers to a side facing the internal side of the building, i.e. typically a subjacent room including any light shaft. Terms such as "outwards" and "inwards" are directions generally perpendicular to an interior-exterior direction, taking as its base point a centre of the roof window.

Referring initially to <FIG> and <FIG>, a roof window <NUM> is shown. The roof window <NUM> is intended to be installed in an inclined roof surface (not shown).

The roof window <NUM> comprises a frame <NUM>, a sash <NUM>, and a pane <NUM>. The frame <NUM> comprises a set of frame members including a top frame member <NUM>, two side frame members <NUM>, <NUM> and a bottom frame member <NUM>. Correspondingly, the sash <NUM> comprises a set of sash members including a top sash member <NUM>, two side sash members <NUM>, <NUM> and a bottom sash member <NUM>. While the frame <NUM> and sash <NUM> are described as rectangular structures, some principles of the presented concepts may be applicable to other geometrical shapes as well.

The pane <NUM> comprises a number of edge portions generally associated to members of the sash <NUM> as will be described in further detail below. An exterior pane surface 4e defines a plane of the roof window <NUM> in an assembled condition of the roof window <NUM>. The assembled condition of the roof window <NUM> is achieved when main components of the frame <NUM> and sash <NUM> have been assembled and the frame <NUM> and sash <NUM> are connected to each other, for instance in an installed position when the roof window <NUM> is ready for use. Correspondingly, an assembled condition of the sash <NUM> is achieved once main components of the sash <NUM> have been assembled, and an assembled condition of the frame <NUM> when main components of the frame <NUM> are assembled. The term "main components" is to be understood as encompassing primary parts of the roof window necessary to perform all operational functions, and not including accessories or auxiliary equipment.

An interior pane surface 4i faces the interior, typically a room of a building subjacent the roof surface in which the roof window <NUM> is installed. A glazing bar <NUM> is fitted to the exterior pane surface 4e, and a glazing bar cover <NUM> is fitted on the interior pane surface 4i. Although less practical, it would also be possible to have a two-part pane with two pane halves divided by a throughgoing glazing bar. In wide roof windows, it is also possible to have more than one glazing bar, for instance two glazing bars dividing the surface of the pane visible from the exterior into three sections.

In the embodiments shown, the sash <NUM> is openable relative to the frame <NUM>, to obtain one or more open positions. In such open positions, the sash <NUM> and pane <NUM> are moved out of the plane of the roof window <NUM>. As will be described in the following, the sash <NUM> is shown as being tophung, i.e. during normal use, the sash <NUM> is rotated about a substantially horizontal hinge axis at or near the top frame member <NUM> and top sash member <NUM>. It is however conceivable to apply some principles of the presented concepts for roof windows on different types of windows having other opening patterns, or being provided as fixed skylights.

Further details shown in <FIG> and <FIG> include an operating assembly <NUM>, here shown as a manual handwinder or screwjack. Other operating assemblies may be present as well.

Also shown is a representative mounting bracket <NUM> forming part of a plurality of mounting brackets forming a load-transferring connection between the roof window <NUM> and a surrounding roof structure (not shown). Such a roof structure may include rafters and battens, plywood or other construction materials.

Finally, an insulating frame <NUM> is shown. Insulation by an insulating frame is optional and may be provided along only some of the frame members or as shown surrounding all four frame members <NUM>, <NUM>, <NUM>, <NUM>.

In the following description of various embodiments, elements having the same or analogous function carry the same reference numerals throughout. Suitable variations and modifications will be apparent to the person skilled in the art.

Typically, a roof window such as the roof window <NUM> shown in <FIG> and <FIG> is supplied with a set of mounting brackets <NUM>. As indicated, two mounting brackets <NUM> are fastened to each side frame member <NUM>, <NUM>. In the following, a single mounting bracket <NUM> will be described, in association with one side frame member <NUM>. The mounting brackets of the set will most often be identical, although variations are possible.

The mounting bracket <NUM> comprises a first bracket leg <NUM> for fastening to the roof structure and a second bracket leg <NUM> for fastening to the frame <NUM> of the roof window <NUM>. To that end, the second bracket leg <NUM> comprises engagement means to interact with a corresponding receiving structure in an outer side of the side frame member <NUM> of the frame <NUM> of the roof window <NUM>. This ensures that the mounting bracket <NUM> is positioned correctly on the side frame member <NUM> and facilitates the installation process. The positioning of the mounting bracket <NUM> may be indicated in both the longitudinal direction and the height direction of the side frame member <NUM>, for instance by suitable markings and/or holes. The first bracket leg <NUM> of the mounting bracket <NUM> is connected to the second bracket leg <NUM> via a bend <NUM>.

In the embodiment shown, the second bracket leg <NUM> is provided with a first engagement means <NUM> in a first section <NUM> of the second bracket leg <NUM> and a second engagement means <NUM> in a second section <NUM> of the second bracket leg <NUM>.

Of these two engagement means <NUM>, <NUM>, the second engagement means <NUM> is configured to assume an inactive position and an active position, of which the active position is shown.

The first engagement means <NUM> is configured to be received in one receiving structure of the outer side of the frame member in the mounted condition of the mounting bracket <NUM> on the frame <NUM> of the roof window <NUM>, and the second engagement means <NUM> is configured to be received in another receiving structure of the outer side of the frame member in the mounted condition of the mounting bracket <NUM> on the frame <NUM> of the roof window <NUM> in its active position only. This is shown most clearly in <FIG>, in which the first engagement means <NUM> is received in a first outer groove <NUM>, and the second engagement means <NUM> is received in a second outer groove 27b. At least the side frame members <NUM>, <NUM> each comprises a plurality of receiving structures at an outer side of the respective side frame member, such that at least one of the receiving structures interacts with the mounting bracket <NUM> in the mounted condition of the roof window <NUM>. The first outer groove <NUM> and the second outer groove 27b both extend in the longitudinal direction of the side frame member <NUM> at a distance from each other in the height direction, the first outer groove <NUM> being located to the exterior of the second outer groove 27b, as seen in the height direction.

Reference is briefly made to <FIG>, showing the mounting bracket <NUM> in a supply condition, in which the second engagement means <NUM> is in its inactive position. In this position, i.e. the inactive position of the second engagement means <NUM>, the second section <NUM> with the second engagement means <NUM> is accommodated in an aperture <NUM> in the first section <NUM>.

To bring the second section <NUM> with the second engagement means <NUM> from the position in the aperture <NUM> to a position in which the second section <NUM> is located substantially in extension of the first section <NUM>, the second section <NUM> with the second engagement means <NUM> is connected to the first section <NUM> via a hinge connection <NUM>, such that the second section <NUM> is configured to be brought from the inactive position to the active position by rotating the second section <NUM>.

In the embodiment shown, each of the first and second engagement means comprises a flange <NUM>, <NUM> protruding at substantially right angles from the respective first and second sections <NUM>, <NUM>. Alternative configurations such as discrete spikes are also conceivable.

In order to fasten the mounting bracket <NUM> securely to the outer side of the side frame member <NUM>, each of the first and second sections <NUM> of the second bracket leg <NUM> comprises one or more openings <NUM>, <NUM>, <NUM>, <NUM> to receive fastening means in the mounted condition of the mounting bracket <NUM> on the frame <NUM> of the roof window <NUM>. Such fastening means typically include screws (not shown).

As shown in <FIG>, the first section <NUM> is provided with an offset 621a. This allows for accommodation of auxiliary equipment including an underroof collar. Details of such auxiliary equipment are described in more detail in Applicant's co-pending patent applications filed on the same date as the present application.

In order to allow alternative mounting of the mounting bracket <NUM> at a different height position on the side frame member <NUM>, the second section <NUM> is provided with an offset 626a matching the offset 621a such that the offset 626a of the second section <NUM> is located substantially in line with the offset 621a of the first section <NUM> in the inactive position of the second section <NUM> of the second bracket leg <NUM> of the mounting bracket <NUM>.

Correct positioning in the height direction ensures that fastening means such as screws (not shown) for fastening the second bracket leg <NUM> to the side frame member <NUM> may be dimensioned to suitable length and diameter to be received in a sufficient material thickness of the side frame member <NUM>. As shown for instance in <FIG>, the side frame member <NUM> has a larger material thickness towards the interior; it is thus suitable to ensure that fastening means are entered into this area.

Specifically, this is ensured in that at least one opening <NUM>, <NUM> in each of the first and second section <NUM>, <NUM> spans the respective offset 621a, 626a. The aperture <NUM> of the first section <NUM> spans the bend <NUM> and the engagement means <NUM> of the second section <NUM> is accommodated in the part of the aperture <NUM> spanning the bend <NUM> when in the inactive position. The first bracket leg <NUM> comprises one or more openings <NUM>, <NUM> to receive fastening means in the mounted condition of the mounting bracket <NUM> on the frame <NUM> of the roof window <NUM> for fastening the mounting bracket <NUM> to the roof structure.

As mentioned in the above, the mounting bracket <NUM> has a supply condition in which the second engagement means <NUM> is in its inactive position. In order to ensure that the mounting bracket <NUM> is brought to an installation condition and subsequently mounted in the correct height position, i.e. the one shown in <FIG>, the second section <NUM> is provided with a protrusion 626b configured to face outwards, away from the outer side of the frame member in the mounted condition when the engagement means <NUM> of the second section <NUM> is in its active position, and to face inwards, towards the outer side of the frame member in the mounted condition when the engagement means <NUM> of the second section <NUM> is in its inactive position. In this way, the protrusion 626b acts as a guard to prevent that an installer does not bring the second section <NUM> with the second engagement means <NUM> to its active position and/or positions the mounting bracket <NUM> at a more interior position on the side frame member <NUM>, since the protrusion 626b will in that case come into contact with the outer side of the side frame member <NUM> such that face contact is not possible.

In the event that it is in fact desired to position the mounting bracket <NUM> further to the interior in the height direction of the side frame member <NUM>, it is possible to provide a further receiving structure (not shown) in the outer side of the side frame member <NUM> to accommodate the protrusion 626b of the second section <NUM> while the first engagement means <NUM> is received in the second outer groove 27b.

Also visible in <FIG> and <FIG> is an interface unit <NUM> mounted to the frame <NUM> and having multiple functions relative to other components of the roof window <NUM>, including acting as sealing towards the sash <NUM> and for accommodating auxiliary equipment including a covering assembly (not shown) providing a weather-tight transition to the surrounding roofing.

Referring first to <FIG> and <FIG> it is shown that the roof window <NUM> furthermore comprises a hinge assembly <NUM>.

The hinge assembly <NUM> is configured in such a way that it allows the sash <NUM> to be tophung in a first operational condition corresponding to normal use. That is, during normal use the sash <NUM> is rotated about a substantially horizontal first hinge axis α at or near the top frame member <NUM> and top sash member <NUM> between a closed position and an open position.

Referring now also to <FIG>, it is seen that the hinge assembly <NUM> comprises a hinge unit <NUM> with a frame hinge part <NUM> connected to or connectable to at least the top frame member <NUM>, a sash hinge part <NUM> connected to at least the top sash member <NUM>, and a hinge pin <NUM> connecting the frame hinge part <NUM> with the sash hinge part <NUM>.

The term "connected to" implies that the component in question is in a condition, state or position in which the component in question is in fact connected to a part, whereas "connectable to" is intended to encompass such conditions, states and positions in which the component in question may be connected to the relevant part, but is not necessarily in connection with the part. In the description of <FIG>, the frame hinge part <NUM> including any sub-components will be described as being connected to parts of the frame <NUM>. Further below, the possibility of providing the frame hinge part <NUM> and sub-components as connectable to parts of the frame <NUM> will be described in more detail.

The frame hinge part <NUM> comprises a frame hinge base plate <NUM> connected to an inner side of the top frame member <NUM> and provided with a receiving structure <NUM> for the hinge pin <NUM> defining the hinge axis, and the sash hinge part <NUM> comprises a sash hinge base plate <NUM> connected to an outer side of the top sash member <NUM> and provided with a receiving structure <NUM> for the hinge pin <NUM>, such that the hinge unit <NUM> forms a pin-and-barrel hinge.

In the embodiment shown, the receiving structure <NUM> of the frame hinge part <NUM> forms a two-part barrel, the barrel parts 922a, 922b surrounding a barrel <NUM> formed by the receiving structure of the sash hinge part <NUM>. A gap is provided between the barrel <NUM> of the sash hinge part <NUM> and the barrel parts 922a, 922b to accommodate manufacturing tolerances.

The frame hinge base plate <NUM> is substantially parallel to the inner side of the top frame member <NUM> in the mounted condition, and the sash hinge base plate <NUM> is substantially parallel to the frame hinge base plate <NUM> in the closed position of the sash <NUM>.

Furthermore, the receiving structure <NUM> of the frame hinge part <NUM> is connected to the frame hinge base plate <NUM> via an inclined section <NUM>, and the receiving structure <NUM> of the sash hinge part <NUM> is connected to the sash hinge base plate <NUM> via an inclined section <NUM>, such that the first hinge axis α is offset outwards relative to the base plate <NUM> of the frame hinge part <NUM>.

Although not shown in these drawing figures, the hinge assembly <NUM> may comprise a set of hinge units <NUM> connected to or connectable to top corners of the frame <NUM> and sash <NUM>, such that one hinge unit <NUM> is connected to top corners of the top frame member <NUM> and one side frame member <NUM>, and the top sash member <NUM> and one side sash member <NUM>, and another, preferably mirror-inverted, hinge unit is connected to or connectable to top corners of the top frame member <NUM> and the other side frame member <NUM>, and the top sash member <NUM> and the other side sash member <NUM>.

While each hinge unit <NUM> could in principle be connected only to the top frame member <NUM> and top sash member <NUM>, the embodiment shown provides for connection also to the adjoining side frame member and side sash member as well. Thus, the frame hinge base plate <NUM> is connected to a frame hinge side flange <NUM>, here in a one-piece integral connection, and the frame hinge side flange <NUM> is connected to an inner side of the side frame member <NUM>. Some portions of the frame hinge base plate <NUM> and the frame hinge side flange <NUM> are offset from other portions, but in general, the frame hinge side flange <NUM> extends substantially perpendicularly to the frame hinge base plate <NUM> from a transition section 924a to a free end section 924b.

Correspondingly, the sash hinge base plate <NUM> is connected to a sash hinge side flange <NUM>, preferably in a one-piece integral connection, and wherein the sash hinge side flange <NUM> is connected to an inner side of a side sash member <NUM>. As for the frame hinge portion <NUM>, the sash hinge side flange <NUM> generally extends substantially perpendicularly to the sash hinge base plate <NUM> from a transition section 934a to a free end section 934b, but some portions may be offset from other portions.

At the free end section 924b of the frame hinge side flange <NUM>, a secondary hinge pin <NUM> is provided (shown in <FIG>). In this way, the hinge assembly <NUM> provides for means to allow the sash <NUM> to be rotated about a substantially horizontal second hinge axis β at a distance from the top frame member <NUM> and top sash member <NUM>.

The hinge assembly <NUM> thus makes it possible to put the roof window <NUM> in a second operational condition in which a plurality of additional open positions are achievable. As will be described further on in the description, means are provided to allow decoupling of the frame hinge base plate <NUM> from the top frame member <NUM> so as to allow the sash <NUM> to rotate about the second hinge axis β.

In order to ensure that the movement of the sash <NUM> is restricted, the hinge unit <NUM> may be provided with opening restricting means. In the embodiment shown, two independent opening restricting means are present, but other configurations including only one opening restricting means are conceivable.

A first opening restrictor <NUM> is provided by an arm <NUM> rotatably connected to a sash or frame member, and the arm <NUM> comprises a track <NUM> engaging with a pin <NUM> on a frame or sash member. The arm <NUM> is rotatably connected to the sash hinge side flange <NUM> in a rotatable joint <NUM>, and wherein the pin <NUM> interacting with the track <NUM> is provided on the frame hinge side flange <NUM>.

A second opening restricting means is foreseen in that an abutment notch <NUM> is provided on the frame hinge side flange <NUM> and configured to cooperate with a stop pin <NUM> provided at the side frame member <NUM>, in the embodiment shown on a side frame coupling plate <NUM> (<FIG>) to be described in more detail below. The stop pin could alternatively be provided on the side frame member <NUM> itself.

While the coupling of the frame hinge part <NUM> to the top and side frame members by means of a coupling unit <NUM> will be described under a separate heading below, the connection between the sash hinge part <NUM> and the top and side sash members is less complicated:
The sash hinge part <NUM> comprises a plurality of fastening means to allow connection of the sash hinge part <NUM> to the sash <NUM>, preferably comprising one or more holes <NUM> in the sash hinge base plate <NUM>, one or more holes <NUM> in a sash hinge side flange <NUM> and/or a spigot <NUM> in the sash hinge side flange <NUM>. The top sash member <NUM> and side sash members <NUM>, <NUM> comprise suitable receiving means (not shown).

Further details visible in the figures describing the first operational condition of the roof window include guiding elements <NUM> (see <FIG>) and <NUM> (see <FIG>), which ascertain that the sash <NUM> is aligned relative to the frame <NUM> when closing the sash such that any skewness occurring in the open position of the sash <NUM> is eliminated.

Details of the insulating frame <NUM> are also shown in these figures; these include a top piece <NUM>, side pieces <NUM>, <NUM>, and a bottom piece <NUM>. In the embodiments shown, each such insulation frame piece comprises a protrusion <NUM> to be received in the outer side of the respective frame member, and an indentation <NUM> to interact with auxiliary equipment in the form of an underroof collar described in more detail in Applicant's co-pending patent applications filed on the same date as the present application. With particular reference to <FIG>, a recess <NUM> is shown which makes place for the mounting bracket <NUM> to be mounted on the side frame member <NUM> of the frame <NUM>, and a folding line <NUM> which allows folding back of part of the side piece <NUM> of the insulating frame <NUM> to allow access to the outer side of the side frame member <NUM>. At least the side pieces <NUM>, <NUM> of the insulating frame <NUM> are provided with such recesses <NUM> and folding lines <NUM> at or near the location of the intended positions of the mounting brackets <NUM> of the set of mounting brackets supplied with the roof window <NUM>.

Finally, a number of features visible in the figures but not immediately related to the present invention include the configuration of members of the sash <NUM>, namely to include a profile element, an intermediate element and an inner element, and of the bottom frame member <NUM> including an outer piece 24a, a separate inner piece 24b, a cover 24c and an insulating piece 24d. Details of the configuration are described in more detail in Applicant's co-pending patent application filed on the same date as the present application. Exemplary elements include a profile element 31a, intermediate element 31b and inner element 31c of the top sash member <NUM>, profile element 32a, intermediate element 32b and inner element 32c of the side sash member <NUM>, and profile element 34c and inner element 34c of the bottom sash member <NUM>. A screening mounting bracket <NUM> is visible in <FIG> and <FIG>, by which it is possible to install an interior screening device (not shown) in the sash <NUM> to provide screening of the pane <NUM>.

During normal use, i.e. when the roof window <NUM> has been installed, and a user wishes to put the sash <NUM> in a ventilating position, the opening, closing and parking may be carried out by the assistance of an operating assembly, for instance as the shown manual handwinder or screwjack constituting the operating assembly <NUM>.

Referring first to <FIG>, the operating assembly <NUM> comprises a sash fitting <NUM>, a spindle part <NUM> with a spindle <NUM> connected to a socket fitting <NUM> via a nut part <NUM>, and a handle <NUM>, the sash fitting <NUM> being connected to the bottom sash member <NUM> and the socket fitting <NUM> being connected to the bottom frame member <NUM> in a mounted condition of the operating assembly, such that upon rotation of the spindle part <NUM> relative to the nut part <NUM>, the bottom sash member <NUM> is moved relative to the bottom frame member <NUM>.

In the embodiment shown, in which the roof window <NUM> defines a supply condition which is suitable for packaging and transportation, the sash fitting <NUM> is connected to the bottom sash member <NUM> of the roof window <NUM> whereas the spindle part <NUM> with the nut part <NUM> and the socket fitting <NUM> are provided separately from the roof window <NUM>.

The nut part <NUM> comprises a nut ring <NUM> connected to a set of flanges <NUM> protruding from a base plate <NUM> of the socket fitting <NUM>, here by means of a set of bolts <NUM>.

The operating assembly <NUM> furthermore comprises a split <NUM> associated to the sash fitting <NUM>, the split <NUM> being displaceable between an active position in which it is in engagement with a set of openings <NUM> in a set of flanges <NUM> protruding from a base plate <NUM> of the sash fitting <NUM> and an inactive position to reveal a reception gap between the flanges <NUM> of the sash fitting <NUM>.

The spindle part <NUM> comprises an end portion <NUM> configured to cooperate with the sash fitting <NUM> in the mounted condition.

Referring now also to <FIG>, the end portion <NUM> of the spindle part <NUM> is provided with an opening <NUM> configured to cooperate with the split <NUM> in the mounted condition.

The socket fitting <NUM> is provided with at least one guide protrusion <NUM> configured to be accommodated in at least one corresponding guiding hole <NUM> of the bottom frame member <NUM> in the mounted condition of the operating assembly <NUM>.

As shown in <FIG>, in the supply condition of the roof window <NUM>, a transportation fitting <NUM> is connected to the sash fitting <NUM> and to the bottom frame member <NUM> such that the sash <NUM> is held stationary relative to the frame <NUM>.

Referring now also to <FIG>, the transportation fitting <NUM> comprises a base portion <NUM> configured to abut an inner side of the bottom frame member <NUM> and an anchor portion <NUM> with an aperture <NUM> cooperating with the split <NUM> associated with the sash fitting <NUM> in the supply condition of the roof window <NUM>, said anchor portion <NUM> extending substantially perpendicularly to the base portion <NUM>.

The transportation fitting <NUM> comprises an inclined portion <NUM> forming a transition between the base portion <NUM> and the anchor portion <NUM>.

In order to ensure correct positioning of the transportation fitting <NUM>, the base portion <NUM> is provided with at least one guide protrusion <NUM> cooperating with at least one corresponding guiding hole <NUM> of the bottom frame member <NUM> in the supply condition of the roof window <NUM>.

To retain the stationary relationship between the sash <NUM> and frame <NUM>, the base portion <NUM> is provided with a hole <NUM> configured to receive fastening means such as a screw to provide the connection of the transportation fitting <NUM> to the bottom frame member <NUM>.

In the following, the coupling unit <NUM> of the hinge assembly <NUM> will be described in some detail.

The coupling unit <NUM> is configured to allow selective coupling of at least the frame hinge part <NUM> of the hinge unit <NUM> to the top frame member <NUM> and optionally to one of the side frame members <NUM>, <NUM>. In the following, the hinge unit <NUM> will be described as comprising both the frame hinge base plate <NUM> and the frame hinge side flange <NUM>, and the coupling unit <NUM> will be described as comprising both a top frame coupling plate <NUM> and a side frame coupling plate <NUM>. Alternative configurations are conceivable.

To render the selective coupling possible, the frame hinge part <NUM> is provided with engagement means <NUM>, <NUM> to cooperate with the top frame coupling plate <NUM> and the side frame coupling plate <NUM>, respectively, such that the frame hinge base plate <NUM> of each hinge unit <NUM> of the hinge assembly <NUM> is connectable to the top frame coupling plate <NUM> and the frame hinge side flange <NUM> is connectable to the side frame coupling plate <NUM>.

The top frame coupling plate <NUM> comprises a base section <NUM> connected to an inner side of the top frame member <NUM>. The top frame coupling plate <NUM> is connected to the top frame member <NUM> by means of a plurality of fastening means including at least one spigot 961c on the base section <NUM> and two bolt elements functioning also as engagement pins <NUM>, <NUM> of the engagement means of the top frame coupling plate <NUM>. In this case, each engagement pin <NUM>, <NUM> cooperates with an insert nut <NUM>, <NUM> on the outer side of the top frame member <NUM>. To accommodate the top frame coupling plate <NUM>, the top frame member <NUM> comprises a hinge assembly receiving milling 29a and a set of openings 29c, 29e of which openings 29e are through-going openings, or through-holes.

In the embodiment shown, the engagement means <NUM> of the frame hinge part <NUM> provided on the frame hinge base plate <NUM> comprise a set of receiving recesses including two abutment recesses 926a, 926b to interact with counterpart engagement means on the top frame coupling plate <NUM> to align the hinge unit <NUM> relative to the coupling unit <NUM> in the longitudinal direction of the top frame member <NUM>, preferably also to act as a stop for the hinge unit <NUM> in the direction towards the interior and in the inwards direction relative to the inner side of the top frame member <NUM>. Here, the counterpart engagement means comprise two engagement pins <NUM>, <NUM> protruding inwards relative to the base section <NUM> and relative to the inner side of the top frame member <NUM>.

A further engagement means of the top frame coupling plate <NUM> comprise a hook element <NUM> comprising an arm 964a with a hook 964b and connected to the base section <NUM> in a rotational joint 964c. The hook element <NUM> is configured to cooperate with a nook section 926d of a lock recess 926c) formed in the frame hinge base plate <NUM> and forming part of the set of receiving recesses constituting the engagement means <NUM> of the frame hinge part <NUM> to lock the hinge unit <NUM> relative to the coupling unit <NUM> in the direction towards the exterior.

The hook element <NUM> is biased towards a locking position in which the hook 964b is lodged in the nook section 926d of the lock recess 926c. Here, the bias is provided by a spring 964e accommodated with one end in a spring-receiving opening 964d in the arm 964a and with another end in a spring-receiving opening in the base section <NUM>, such that the spring 964e passes through an opening 961a allowing movement of the spring 964e during movement of the hook element <NUM> from the locking position to an unlocking position in which the hook 964b is free of the nook section 926d.

The engagement means of the frame hinge part <NUM> provided on the frame hinge side flange <NUM> are constituted by the secondary hinge pin <NUM> to lock the hinge unit <NUM> to the side frame member <NUM> in the first operational condition and to allow rotation of the sash <NUM> in the second operational condition.

By forming each coupling unit <NUM> with one top frame coupling plate <NUM> and one side frame coupling plate <NUM>, the coupling unit <NUM> allows selective coupling of the frame hinge part <NUM> of the associated hinge unit <NUM> to the top frame coupling plate <NUM> and the side frame coupling plate <NUM> in the first operational condition, and to only the side frame coupling plate <NUM> in the second operational condition.

The side frame coupling plate <NUM> comprises a base section <NUM> connected to the inner side of the side frame member <NUM>, and the engagement means of the top frame coupling plate <NUM> comprise a key-hole shaped recess 971r in the base section <NUM> of the side frame coupling plate <NUM>. The key-hole shaped recess is configured to cooperate with a secondary hinge pin <NUM> to engage and lock the hinge unit <NUM> to the side frame member <NUM> in the first operational condition and to allow rotation of the sash <NUM> about the substantially horizontal second hinge axis β in the second operational condition.

The secondary hinge pin <NUM> comprises an enlarged head and a shaft, and the key-hole shaped recess 971r comprises an entry opening 971ra allowing entry of the head of the secondary hinge pin <NUM> and a narrowed track section 971rb allowing entry of the shaft but preventing withdrawal of the head of the secondary hinge pin <NUM>, as shown in <FIG>.

In order to guide the secondary hinge pin <NUM> into the key-hole shaped recess, the entry opening 971ra comprises a recessed section 971c.

Once the secondary hinge pin <NUM> has entered the key-hole shaped recess 971r, it is locked by means of a biased lock element <NUM> on the side of the base section <NUM> facing the inner side of the side frame member <NUM>. The biased lock element <NUM> comprises a connection section 972a and a resilient end section 972b with an opening 972c allowing entry of the head of the secondary hinge pin <NUM>. In order to release the locked engagement, the resilient end section 972b is provided with a release tab 972d, which may be manipulated manually.

The side frame coupling plate <NUM> is connected to the side frame member <NUM> by means of a plurality of fastening means including at least one spigot 971e on the base section <NUM> and at least one opening 971f for fastening means such as screws <NUM>. To receive the side frame coupling plate <NUM>, the side frame member <NUM> comprises a hinge assembly receiving milling 29b and a set of openings 29d, 29f.

Turning now to <FIG>, possible movement patterns and positions of the sash <NUM> in the second operational condition will be described. Three positions will be described, namely a side coupling position corresponding to the position in which the sash <NUM> with the hinge unit <NUM> is first coupled to the frame <NUM> in that the frame hinge side flange <NUM> is brought into engagement with the side frame coupling plate <NUM>, a top coupling position corresponding to the position in which the sash <NUM> with the hinge unit <NUM> is ready to be brought into engagement with the top frame coupling plate <NUM>, and a service position, in which a clearing is created between the top sash member <NUM> and the top frame member <NUM>. It is self-evident that the sash <NUM> may assume other positions in the second operational condition.

To protect the components of the roof window <NUM> and to facilitate the coupling, a sash installation component <NUM> is provided to support the sash <NUM> during installation and use.

Referring in particular to <FIG>, the sash installation component <NUM> comprises a body portion <NUM>, a frame engagement portion <NUM> and a plurality of support surfaces <NUM>, <NUM>, <NUM> for the sash <NUM>.

In the embodiment shown, the sash installation component <NUM> comprises three distinct support surfaces.

Of these support surfaces, a first support surface <NUM> supports the bottom sash member <NUM> in the side coupling position. The side coupling position is shown in <FIG>, and the abutment between the first support surface <NUM> and the bottom sash member <NUM> is shown most clearly in the cross-sectional view of <FIG>.

A second support surface <NUM> supports the bottom sash member <NUM> in the top coupling position shown in <FIG>. As is apparent, the sash <NUM> has been moved closer to the top frame member <NUM> and thus, the hinge unit <NUM> is in closer proximity to the top frame coupling plate <NUM>. In this position, it is possible to bring the recesses 926a and 926b over the engagement pins <NUM>, <NUM>, and the hook element <NUM> is moved into engagement with the lock recess 926c until the hook 964b is lodged in the nook 926d. If the engagement is indeed carried out, the roof window <NUM> is in its first operational condition and may be taken into normal use.

If the first operational condition has been reached, and it is desired to obtain the service position, the hinge unit <NUM> is first disengaged from the top frame coupling plate <NUM> by releasing the hook element <NUM>, for instance by applying a suitable tool.

Once the disengagement has been carried out and the roof window <NUM> is in its second operational condition, the sash installation component <NUM> is arranged at the longitudinal ends of the bottom frame member <NUM>. In this way, it is possible to allow a third support surface <NUM> to support the side sash member or members <NUM>, <NUM>. To provide adequate support, the portion of the sash installation component <NUM>, in which the third support surface <NUM> is formed, is wider than the body portion <NUM>.

To ensure safe retention of the sash installation component <NUM> on the bottom frame member <NUM>, the frame engagement portion <NUM> is shaped in accordance with a profile of the bottom frame member <NUM>, such that the dimensions of the engagement portion <NUM> match the contours and dimensions of the bottom frame member <NUM>. In the embodiment shown, an interior contact section 352a, a first inner contact section 352b, a first exterior contact section 352c, a second inner contact section 352d, and a second exterior contact section 352e are provided. Additionally, an interior end section 352f and an outer end section <NUM> are provided.

Finally, the first support surface <NUM> is separated from the second support surface <NUM> by a dividing rib <NUM>.

Two sash installation components <NUM> are suitably provided together with the roof window <NUM> in its supply condition. While not preferred, it is also possible to provide support of the sash <NUM> by a single sash installation component <NUM>, just as more than two may be provided, for instance in the case of wide roof windows.

In the following, an exemplary method of installing the roof window <NUM> in a roof structure (not shown) will be described. It is understood that various steps may be carried out differently, or in a different order.

<FIG> shows the roof window <NUM> when mounted in a roof structure (not shown) and in a position of normal use, i.e. in the first operational condition allowing opening of the sash <NUM> relative to the frame <NUM>. When mounted, the roof window <NUM> is surrounded by underroofing and flashing assemblies (not shown) providing a weather-tight transition to a surrounding roofing. Details of the configuration of such assemblies are described in more detail in Applicant's co-pending patent applications filed on the same date as the present application.

In the following description, the installation steps will be described only briefly. For a detailed description of the interaction between components, reference is made to the relevant sections in the above description of embodiments.

The roof window <NUM> with the frame <NUM>, sash <NUM>, and pane <NUM> are provided in a supply condition. Depending on the conditions on the installation site, the roof window <NUM> is typically supplied in a packaging which is opened in proximity to the building, in which the roof window <NUM> is to be installed, possibly inside a room of the building. One example of an unpacking situation is shown in <FIG>. To ease handling of the sash <NUM>, a set of suction disc tools <NUM> is provided; however, it is also possible to handle the roof window <NUM> manually without tools, or craning with or without suction disc tools, cf.

It is noted that in the shown embodiment, the insulation frame <NUM> is connected to the frame <NUM> in the supply condition. The principles of the present invention are however also applicable to roof windows in which the insulation frame <NUM> is supplied separately, or without an insulation frame altogether.

The operating assembly <NUM> is supplied with only some components fastened to the sash <NUM>, while others are supplied separately. In case the transportation fitting <NUM> is present, such transportation fitting <NUM> is removed.

Following unpacking, the sash <NUM> is opened relative to the frame <NUM>. The hinge unit <NUM> of the hinge assembly <NUM> is disengaged from the coupling unit <NUM> as shown in <FIG> until the sash <NUM> is detached from the frame <NUM>.

The sash <NUM> with the hinge unit <NUM> is placed at a suitable location awaiting further handling. This allows easy handling and subsequent installation of the frame <NUM> in the roof structure. In preparation of the installation, the mounting brackets <NUM> need to be fastened to the frame <NUM>.

The set of mounting brackets <NUM> is typically provided separately, for instance in a separate packaging within the roof window packaging. As indicated in <FIG>, each mounting bracket <NUM> is brought from its supply condition to the installation condition.

Subsequently, access to the frame <NUM> is provided by swinging portions of the insulating frame <NUM> to reveal the outer side of the side frame members as outlined in <FIG>. Once the mounting bracket <NUM> has been fastened as outlined in <FIG>, the portions of the insulating frame <NUM> are repositioned as shown in <FIG>.

Installation of the frame <NUM> takes place by positioning the frame <NUM> in the opening provided and fastening the mounting brackets <NUM> to the subjacent roof structure. Underroofing and flashing assemblies are installed as prescribed.

When the frame <NUM> is in its appropriate place, the sash installation components <NUM> are positioned on the bottom frame member and the sash <NUM> lifted into the opening of the frame <NUM>, resting on one of the sash installation components <NUM> as shown in <FIG>. The sash <NUM> is placed in the side coupling position on the sash installation components <NUM> as shown in <FIG> and each hinge unit <NUM> is engaged with the respective side frame coupling plate at either side of the frame <NUM> and sash <NUM> as indicated in <FIG>.

The sash <NUM> is then moved into the top coupling position on the sash installation components <NUM> as shown in <FIG> and each hinge unit <NUM> then engaged with the respective top frame coupling plate as shown in <FIG>.

In case the roof window <NUM> has been craned into position including suction disc tools <NUM> as shown in <FIG>, the tools <NUM> may be removed from the interior of the building by placing the sash <NUM> in the service position shown in <FIG>. As mentioned in detail above, this operation requires disengagement of the hinge units <NUM> from the top frame coupling plates of the coupling units <NUM> and positioning of the sash installation components <NUM> at the ends of the bottom frame member as shown in <FIG>. Once the service opening between the frame and sash has been established, an installer or other person may gain access to the exterior of the sash and remove the tools.

It is understood that the service position may be established at any time during use of the roof window.

Finally, a series of photographs of details of an actual roof window is shown in <FIG> and <FIG>.

Claim 1:
A roof window (<NUM>) comprising a frame (<NUM>), a sash (<NUM>), and a pane (<NUM>), in which
the frame (<NUM>) comprises a set of frame members including a top frame member (<NUM>), two side frame members (<NUM>, <NUM>) and a bottom frame member (<NUM>) and the sash (<NUM>) comprises a set of sash members including a top sash member (<NUM>), two side sash members (<NUM>, <NUM>) and a bottom sash member (<NUM>), and
the sash (<NUM>) is configured to be tophung during normal use in that the sash (<NUM>) is intended to be rotated about a substantially horizontal hinge axis at or near the top frame member (<NUM>) and top sash member (<NUM>), the sash (<NUM>) being openable relative to the frame (<NUM>) from a closed position to an open position within a predefined opening angle by means of an operating assembly (<NUM>) in a mounted condition of the roof window (<NUM>),
the operating assembly (<NUM>) comprising a sash fitting (<NUM>), a spindle part (<NUM>) with a spindle (<NUM>) connected to a socket fitting (<NUM>) via a nut part (<NUM>), the sash fitting (<NUM>) being connected to the bottom sash member (<NUM>) and the socket fitting (<NUM>) being connected to the bottom frame member (<NUM>) in a mounted condition of the operating assembly such that upon rotation of the spindle part (<NUM>) relative to the nut part (<NUM>), the bottom sash member (<NUM>) is moved relative to the bottom frame member (<NUM>), characterised in that
in a supply condition of the roof window (<NUM>), the sash fitting (<NUM>) is connected to the bottom sash member (<NUM>) of the roof window (<NUM>) whereas the spindle part (<NUM>) with the nut part (<NUM>) and the socket fitting (<NUM>) are provided separately from the roof window (<NUM>),
and in that in the supply condition of the roof window (<NUM>), a transportation fitting (<NUM>) is connected to the sash fitting (<NUM>) and to the bottom frame member (<NUM>) such that the sash (<NUM>) is held stationary relative to the frame (<NUM>).