Patent Publication Number: US-11028627-B2

Title: Hinge for a window, a window including a set of such hinges, and a method of installing such a window

Description:
TECHNICAL FIELD 
     The present invention relates to a hinge for a window having a frame and a sash, in which the hinge comprises a set of hinge components including a frame hinge part, a sash hinge part, a mounting arrangement and a plurality of movement supporting parts. The invention furthermore relates to a window including a set of hinges with a mounting arrangement, and to a method of installing such a window. 
     BACKGROUND ART 
     Basically, windows may be provided in a number of varieties and include more or less complicated structures in order to allow opening of the sash and to fulfil other functions, such as ventilation, while permitting cleaning of the outside of the pane from inside the building. The varieties include windows configured for installation in an inclined roof, of which one variety is roof windows of the pivoting type, the hinge axis being either located at the centre or displaced from the centre of the window, and top-hung roof windows that pivot for cleaning by means of an intermediate frame. 
     These requirements are made possible by the provision of a hinge with a particular pattern of movements, which in turn makes it possible to establish an overlap between the covering elements fastened to the frame and the counterpart covering elements fastened to the sash in the closed position of the roof window. 
     One very well-proven type of hinge is the pivot hinge including a guidance on the frame hinge part cooperating with a slide rail on the sash hinge part. Such pivot hinges are for instance disclosed in Applicant&#39;s EP 1 038 083 B1 and EP 1 781 883 B1, and are very versatile as regards operational areas and adaptation of components. Examples of roof windows incorporating such adapted hinges are shown in Applicant&#39;s published European patent applications EP 2 770 146 A1 and EP 2 770 149 A1. 
     However, as the traditional pivot hinges to some extent rely on frictional forces to operate correctly, it is desirable to utilize an alternative configuration of the hinge in certain fields of application, in which the desired pattern of movements is provided by a linkage mechanism. The use of such hinges, known as so-called pantograph hinges, including linkage mechanisms is traditionally most often known from the furniture field, but such hinges are also well-known to use for roof windows. Prior art examples include Danish patent No. 114 321, U.S. Pat. No. 4,446,597, and Applicant&#39;s European patents EP 22 657 B1 and EP 89 813 B1, and co-pending international application WO 2017/076416 A1. 
     Mounting a hinge comprising a linkage mechanism can be a challenge, since the frame hinge part and the sash hinge part are inherently connected to each other via the linkage mechanism itself. Subsequently, mounting the window sash to the frame may be heavy and tricky for one person to do, considering that during the step of installing the window sash, the installation person must hold the window sash in place and fasten the hinge at the same time. The installation process is complicated by the limited available space, as the set of hinges needs to be positioned between the sash and the frame, in a gap that for apparent reasons needs to be as small as possible, thus restraining the degree of freedom for transverse movements, i.e. in directions perpendicular to the hinge plane defined by the base plate of the frame hinge part. Further, once the window is installed it is difficult to have the window sash removed of the same reason as mentioned above without involving more than one person. Therefore, there is a need for an improved solution to install a window, in particular as regards connecting the hinge to the window frame. 
     SUMMARY OF INVENTION 
     With this background it is an object of the present invention to improve a hinge of the kind mentioned in the introduction with respect to the overall mounting conditions. 
     In a first aspect, this and further objects are met by the provision of a hinge for a window having a frame and a sash and adapted to define a hinge axis of the window, said hinge comprising a set of hinge components including: a frame hinge part having a base plate configured to be connected to a frame member of the frame; a sash hinge part having a base plate configured to be connected to a sash member of the sash; a mounting arrangement configured to assist in bringing the hinge from a supply condition to a mounted condition, in which the base plate of the frame hinge part is connected to the frame member and the base plate of the sash hinge part to the sash member; and a plurality of movement supporting parts, connected to a respective base plate of the frame hinge part and the sash hinge part, and configured to allow the sash hinge part to assume an angle relative to the frame hinge part, in which the base plate of the frame hinge part defines a hinge plane substantially perpendicular to the hinge axis of the window in the mounted condition of the hinge, the base plate of the sash hinge part being substantially parallel to the base plate of the frame hinge part, which is characterised by the features of the characterising portion of claim  1 . 
     By providing the mounting arrangement with one or more mounting plates to be initially provided on the frame member, it is possible to achieve the facilitated installation of the window aimed at. A hinge including a mounting arrangement of this type thereby facilitates bringing the hinge from a supply condition to a mounted condition. The mutual engagement of the coupling means of the remaining components of the hinge with the coupling means of the mounting arrangement is easily carried out while at the same time taking place only in a plane parallel with the hinge plane. In this way, no transverse movements are required for attaining the releasable connection. Further, using a prefabricated mounting plate allows the installation to be accurate every time, taking positions and tolerances into account. Moreover, the provision of a mounting plate or mounting plates allows for connection and disconnection without the risk of destroying components of the hinge or any parts of the window when repeatedly being connected and disconnected. This is because the mounting plate may be configured to allow for repeatedly connecting and disconnecting of the window without the use of any penetrating or threaded fastening elements introduced into the material of the window itself and that may cause rupture. The coupling means may be configured without the use of loose fastening elements. By avoiding loose fastening elements, the installation of a window is facilitated even further since the complete installation may be done by one person, without the need for reaching out for fastening means such as screws etc. This type of installation using mounting plates is especially suitable when installing windows in challenging working positions, such as is often the case with roof windows. Since the window may be situated at an inclination and may involve working positions over the head, which are known to cause back and neck strain, it is a great advantage that the installation procedure is facilitated. It is noted that by the term “installation of a window” it is understood that this encompasses assembly of various components constituting or forming a window. During installation of the window, the coupling preferably takes place by first sliding the bolt into the slot and subsequently rotating the base plate of the frame hinge part and the other remaining components of the hinge about the bolt. Initial engagement of these coupling means is logical, and during installation of the window, the installer is supported in that once the coupling has been obtained, the weight of the sash is sustained by the mounting plate connected to the frame. The weight of the sash is often substantial, since the sash is carrying not only the remaining components of the hinge but also the pane. By forming the second engagement member of the coupling means of the remaining components as comprising a shoulder portion, and the second reception member of the coupling means of the mounting arrangement as comprising a spring-biased latch element provided with an abutment portion to engage with said shoulder portion in the mounted condition, it is ensured in this manner that secure engagement of the respective coupling means is obtained as a logical step during installation. It is noted that with the provision of the spring-biased latch element to engage with the shoulder portion, a “semi-automatic” connection may be obtained by simply rotating the sash relative to the frame in the closing direction, thus without the need for additional steps or tools. 
     The definitions of “frame” and “sash” should be interpreted as encompassing any structure fulfilling the requirements of acting as parts in an openable window. Although the mounting plate of the mounting arrangement is described as being configured for arrangement on the stationary frame, it is also conceivable to mount the hinge inversely, i.e. connecting the mounting plate or plates on the movable sash, or other movable frame, and arranging the remaining components of the set of hinge components on the frame. The coupling procedure is then carried out in a manner corresponding to the one described. 
     The terms “remaining components of the set of hinge components” and “remaining components of the hinge” are used interchangeably. In the present context, the term “remaining components of the hinge” encompasses any component forming part of the hinge excluding the mounting plate or plates and parts associated thereto. 
     In a presently preferred embodiment, the spring-biased latch element is connected to said at least one mounting plate in a pivotal connection. This provides for an advantageous and simple way of allowing the second engagement member to be coupled to the second reception member during installation while at the same time being able to provide the required releasability of the coupling. 
     The spring-bias of the latch element may in principle be carried out in any suitable manner; however, a mechanically reliable and simple solution is found by providing the spring-bias by a leaf spring and the latch element with a spring engagement portion. To this end, the mounting plate may include a spring pocket for receiving an end of the leaf spring. In a preferred development of this embodiment, the base late of the frame hinge part is provided with a protruding bottom portion to interact with the leaf spring. 
     In a further presently preferred embodiment, the spring-biased latch element includes a tongue portion acting as a handle for release of the releasable connection. 
     Further ease of installation is obtained by providing the spring-biased latch element with a guide portion. 
     In a still further presently preferred embodiment, the mounting arrangement comprises a first mounting plate and a second mounting plate. This opens up to a more flexible configuration of the mounting arrangement and associated details. 
     As a further development of the still further presently preferred embodiment, the second mounting plate comprises a cover portion. In this way, a safe and aesthetically pleasant protection of the parts behind the cover portion is obtained. 
     The principles underlying the present invention are generally applicable to all kinds of hinges; however, it is particularly advantageous in case the movement supporting parts of the hinge comprises a linkage mechanism including links, springs and at least one pick-up element to provide the hinge as a pantograph hinge. 
     In a second aspect, a window including a set of hinges is provided, and in a third aspect, a method of installing such a window is provided. 
     Other presently preferred embodiments and further advantages will be apparent from the following detailed description and the dependent claims. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The invention will be described in more detail below by means of non-limiting examples of embodiments and with reference to the schematic drawing, in which 
         FIG. 1  is a perspective view of a prior art window; 
         FIG. 2  is an exploded front view of a hinge in a first embodiment of the invention, shown in a position corresponding to an initial step of an installation process; 
         FIGS. 3 to 6  are perspective views of details a hinge in the first embodiment of the invention, from different angles; 
         FIG. 7  is a view corresponding to  FIG. 2 , of a hinge in a second embodiment of the invention; 
         FIGS. 8, 9, 10   a ,  10   b ,  11   a,    11   b,    12   a ,  12   b ,  13   a ,  13   b ,  14   a  and  14   b  are all views showing details of the hinge in the second embodiment of the invention; 
         FIGS. 15 and 16  show details of a hinge in a third embodiment of the invention; and 
         FIGS. 17 to 22  show perspective views from different angles of details of a hinge in a fourth embodiment of the invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     In the following, embodiments of the inventive hinge and window will be described in further detail, with reference to a window with a prior art hinge  10 ′ is shown in  FIG. 1 . Such a hinge  10 ′ and other parts of the window which are applicable also to a window according to the invention are described in Applicant&#39;s published European patent applications EP 2 770 146 A1 and EP 2 770 149 A1 to which reference is hereby explicitly made. It is hence to be understood that the hinge and mounting arrangement according to the invention replaces the prior art hinge  10 ′ at one or both sides of the window. 
     In a manner known per se, the window comprises a sash  2  carrying a glazing in the form of a pane  3  and a frame  1 . The window is intended to be built into a surface, which is inclined with respect to the horizontal, typically a roof, and the window will in the following be referred to as roof window. At a position between the top and centre of the window, there is a hinge connection between the frame  1  and the sash  2 . The hinge connection in  FIG. 1  comprises a set of two prior art hinges, of which one hinge  10 ′ is visible. The frame  1  and sash  2  is each formed by four members of which one frame side member la and one sash side member  2   a  are indicated. The sash  2  is openable with respect to the frame  1 , as the sash  2  may be moved from a closed position, in which e.g. the sash side member  2   a  is substantially parallel with the frame side member  1   a,  to an open position, in which the sash side member  2   a  forms an angle with the frame side member  1   a.  During this movement the sash  2  rotates about a hinge axis α situated at the hinge connection. As indicated in  FIG. 1 , the hinge axis α is located between a centre axis and the top of the roof window, preferably in the interval ⅓ to ⅔ of the distance between the centre axis and the top, most preferred substantially at ½ of the distance between the centre axis and the top. Other positions of the hinge axis are of course conceivable, for instance at the centre of the roof window. A corresponding operation of the window as described above and from here on is also true for the type of hinge described in the Applicant&#39;s co-pending international application published under WO 2017/076416 A1. Common to the hinge types applicable in such windows is that a number of movement supporting parts are provided in the hinge, as will be described further below. 
     To protect the interior and the components of the window itself and to ascertain weather-proof transition to the surrounding roofing, the roof window comprises a covering, including flashing members (not shown), cladding and covering elements of which a frame side covering element  1   b  and sash side covering element  2   b  are shown. 
     From a closed position, the user operates the operating device of the window. The operating device typically comprises a handle (not shown) connected with the sash bottom member and/or an operating and locking assembly including a ventilation flap at the sash top member with a lock mechanism to interact with a striking plate on the frame top member. The hinge  10  exerts a moment on the sash  2 , and in combination with the force, and hence moment, exerted by the user operating the operating device, the moment resulting from the weight of the sash  2  and pane  3  is overcome, along with any frictional forces present. All in all, the opening operation entails that the sash  2  is moved from a closed position to an open position as represented by  FIG. 1 , in which the sash plane forms an opening angle with the frame plane. Closing the window from the open position entails the opposite movement of the sash  2 . It is possible to position the sash  2  in a number of arbitrary opening positions, in which the sash  2  is held stable relative to the frame  1 . The sash  2  is also able to be rotated substantially through 180° to allow cleaning of the outside of the pane  3  from the inside of the building in which the roof window is installed. 
     Referring now to  FIGS. 2 to 6 , a first embodiment of a hinge  110  according to the invention will be described in detail. 
     When referring to the Figures, the terms up, down, upwards, downwards, top and bottom are taken relative to how the figures are displayed, that is having the frame arranged in a lying position with the covering elements facing upwards. A front view is taken from the hinge and viewing towards the frame. A view from behind is therefore taken as viewed from the frame towards the hinge. A longitudinal direction is, if nothing else is mentioned, longitudinal along the length of the frame member. It is to be understood that the arrangement shown in a horizontal orientation is not the normal orientation as the window is installed in an inclined roof. 
     In  FIG. 2 , the hinge  110  is shown in a position corresponding to an initial step of an installation process. This position also corresponds to a supply condition of the hinge according to the invention. The hinge  110  comprises a frame hinge part  130  and a sash hinge part  140  configured to assume an angle relative to the frame hinge part  130 . The hinge  110  forms part of a set of hinges, of which the frame hinge part  130  of each hinge  110  is configured to be connected to the frame side member  1   a  of the frame  1  of the roof window in a mounted condition by a mounting arrangement to be described in further detail, at a location chosen to provide the desired position of the hinge axis α, and the sash hinge part  140  is correspondingly configured to be connected to the sash side member  2   a.    
     As in the prior art hinge  10 ′, the base plate  135  of the frame hinge part  130  defines a hinge plane substantially perpendicular to the hinge axis α of the window in the mounted condition of the hinge, the base plate  145  of the sash hinge part  140  being substantially parallel to the base plate  135  of the frame hinge part  130 . The hinge  110  moreover comprises a plurality of movement supporting parts  190 , connected to a respective base plate  135 ,  145  of the frame hinge part  130  and the sash hinge part  140 , and configured to allow the sash hinge part  140  to assume an angle relative to the frame hinge part  130 . In the specific embodiments shown and described, the movement supporting parts  190  comprises a linkage mechanism including links, springs and at least one pick-up element to provide the hinge as a pantograph hinge. For a description of the parts and operation of such a pantograph hinge, explicit reference is hereby made to the embodiment shown in and described in relation to  FIGS. 2 to 5  of the above-mentioned WO 2017/076416 A1. In principle, however, the fundamental principles of the invention are also applicable to traditional pivot hinges including an arc-shaped guidance on the frame hinge part to receive an arc-shaped slide on the sash hinge part. 
     A mounting arrangement generally designated  150  comprises a mounting plate  151  which is shown in the position it will take in the mounted condition of the hinge on the frame side member  1   a  with fastening means which can be for example pins or spigots (not shown in this embodiment, cf. second embodiment), or any type of threaded fastening means. The spigots are configured to be arranged in corresponding holes  173 ,  174  on the mounting plate  151 . Preferably, the spigots are arranged such that they end in flush with an outer surface  151   a  of the mounting plate  151  in order to avoid collision with the components of the frame hinge part  130 . The outer surface  151   a  is the surface of the mounting plate  151  that faces the frame side member  1   a,  an inner surface  151   b  facing away from the frame side member  1   a  in the mounted condition. The base plate  145  of the sash hinge part  140  is provided with corresponding spigots (not described in detail). 
     The remaining components of the hinge  110  shown in  FIG. 2 , i.e. the base plate  135  of the frame hinge part  130 , the movement supporting parts  190  and the sash hinge part  140  with its base plate  145 , are in a position corresponding to that the sash (not shown) would have in this initial step of installation, namely substantially vertical. This position also corresponds to the supply condition of the hinge on the window, in which these remaining components are all connected to the sash. Hence, in the supply condition, only the mounting plate (or mounting plates, if more than one) of the hinge is fastened to the frame. 
     This initial step is common to the first embodiment, the second embodiment (cf.  FIG. 7 ) and further embodiments. Elements having the same or analogous function as in the first embodiment are provided with the same reference numerals to which  100 ,  200 ,  300  and  400 , respectively, have been added. The operational principles underlying the invention are thus based on the following fundamental features, referring now jointly to  FIGS. 2 and 7 , and described referring only to the first and second embodiments: 
     The mounting arrangement  150 ;  250  has one or more mounting plates  151 ;  251 ,  252  arranged on the frame member  1   a  substantially in parallel to the base plate  135 ;  235  of the frame hinge part  130 ;  230  in the mounted condition. At least one set of coupling means  153 ,  154 :  253 ,  254  is configured to engage with corresponding coupling means  163 ,  164 ;  263 ,  264  of the remaining components of the set of components of the hinge  110 ;  210 . The coupling means of the mounting arrangement  150 ;  250  comprise at least one reception member  153 ,  154 ;  253 ,  254  provided on the at least one mounting plate  151 ;  251 ,  252  to engage with a respective engagement member  163 ,  164 ;  263 ,  264  of the coupling means of the remaining components by movement of the remaining components of the hinge substantially in parallel with said hinge plane to provide a releasable connection between the remaining components of the hinge  110 ;  210  and the at least one mounting plate  151 ;  251 ,  252 . 
     In all shown embodiments, a first engagement member of the coupling means of the remaining components of the hinge is a bolt  163 ;  263  provided on the base plate  135 ;  235  of the frame hinge part  130 ;  230 , and a first reception member is a slot  153 ;  253  in one of the mounting plates  151 ;  251  adapted to receive the bolt  163 ;  263 . It is preferred that from the position shown in  FIGS. 2 and 7 , the remaining components of the hinge are moved downwards and the bolt  163 ;  263  is first slid into the slot  153 ;  253 . Subsequently the base plate  135 ;  235  of the frame hinge part  130 ;  230  and the other remaining components of the hinge  110 ;  210  are rotated about the bolt  163 ;  263  to provide an at least temporary retention of the remaining components of the hinge relative to the at least one mounting plate  151 ;  251 . 
     It is noted that during the entire movement, the respective planes of the mounting plate and the base plates of the frame hinge part and the sash hinge part are at all times kept substantially parallel, thus avoiding transverse movements perpendicular to the hinge plane as defined by the base plate  135 ;  235  of the frame hinge part  130 ;  230 . 
     Following the engagement of the coupling means of remaining hinge components with the coupling means of the mounting arrangement as described in the above, the window sash is in “safe position”, as the weight of the sash is transferred to the frame via the mounting arrangement. The installer is thus in principle free to leave the window at least temporarily. 
     An increased security against unintentional release is however increased if also a secondary coupling is present. 
     According to the invention, and as shown in connection with the first and second embodiments, a second engagement member of the coupling means of the remaining components comprises a shoulder portion  164 ;  264 , and the second reception member of the coupling means of the mounting arrangement  150 ;  250  comprises a spring-biased latch element  154 ;  254  provided with an abutment portion  155 ;  255  to engage with said shoulder portion  164 ;  264  in the mounted condition. 
     As shown, the spring-biased latch element  154 ;  254  is here connected to the mounting plate in question, the mounting plate  151  in the first embodiment, and a second mounting plate  252  in the second embodiment, in a pivotal connection  159 ;  259 . 
     The spring-bias of the latch element  154 ;  254  is specifically provided by a leaf spring  156 ;  256  and the latch element  154 ;  254  includes a spring engagement portion  157   a;    257   a.  As shown in detail only in connection with the second embodiment, the leaf spring  256  is received in a spring pocket  256   a  of the second mounting plate  252 . Other means of accommodating the leaf spring are conceivable. 
     The provision of the spring-biased latch element  154 ;  254  ensures a simple, precise and reliable secondary coupling between the remaining hinge components and the mounting arrangement such that the releasable connection is achieved in a “semi-automatic” step when rotating the sash relative to the frame during installation. 
     In order to be able to release the engagement in an easy manner, the spring-biased latch element  154 ;  254  in the specific first, second and third embodiments includes a tongue portion  157   b;    257   b  acting as a handle for release of the releasable connection. 
     A further detail of the latch element  154 ;  254  is the presence of a guide portion  157   c;    257   c.  The guide portion  157   c;    257   c  is particularly useful during installation, i.e. activation of the releasable connection, and when releasing the connection. 
     Although the releasable connection is thus achieved without the need for carrying out additional steps to secure the sash to the frame, an additional locking device may be incorporated in the hinge or mounting arrangement. It is conceivable to utilise parts of the window covering for locking the set of hinge components relative to each other in the mounted condition of the hinge. Examples of locking devices are conceivable to the person skilled in the art. 
     One difference between the first and second embodiments is that in the second embodiment, the mounting arrangement  250  comprises a first mounting plate  251  and the second mounting plate  252  mentioned above. Referring also to the above description, it is apparent that the first reception member  253  is positioned in the first mounting plate  251  and the second reception member in the form of spring-biased latch element  254  is associated to the second mounting plate  252 . 
     Another difference is that the second mounting plate  252  comprises a cover portion  258  ensuring that the operational parts of the mounting arrangement are hidden to the user. In principle, the only exception is the tongue portion  257   b  acting as a handle for release of the connection which is accessible to the user. It is noted that the provision of a cover portion is also conceivable in connection with the first embodiment. 
     The fastening of the respective mounting plates  251 ,  252  to the frame side member is ensured in substantially the same way as with the one-piece mounting plates of the first embodiment, namely via spigots  271   a,    271   b  on the first mounting plate  251 , and spigots  272   a,    272   b  on the second mounting plate  252 . Only holes  273 ,  274  in the first mounting plate  251  for spigots  271   a,    271   b  are shown. It is for instance conceivable to form the second mounting plate  252  in one-piece as a moulded part of a suitable plastic material, including the cover portion  258  and the spigots  272   a,    272   b.    
     Referring now to  FIGS. 15 and 16 , details of a third embodiment of a hinge generally designated  310  are shown. Only differences relative to the first and second embodiments will be described in detail. 
     As in previously described embodiments, the hinge  310  comprises a mounting arrangement  350  comprising a mounting plate  350  in which a first reception member in the form of slot  353  is provided. A second reception member in the form of latch element  354  is provided as well. 
     Spring  356  for biasing the latch element  354  extends from under the latch element  354  to a hook-up section at a spring engagement protrusion  351   a  on the mounting plate  350 . 
     A cover  358  is provided as well, configured to be connected to the mounting plate  351  by means of first and second engagement means  358   b,    358   c  to engage with first and second cover engagement protrusions  351   b,    351   c  on the mounting plate  351 . As is furthermore apparent, the cover  358  has a first spring abutment portion  358   a  and a second spring abutment portion  358   d.    
     As a further detail, reference is initially made to  FIGS. 4 and 8 , in which the connection of the frame side covering element  1   b  and sash side covering element  2   b  to the respective hinge  110 ,  210  is carried out by a snap connection  160 ,  170 ;  260 ,  270 . The snap connection typically comprises a snap anchor fastened to the covering element  1   b,    2   b  and a holding clip formed in the relevant hinge part. An advantageous version of the snap anchor will be described in more detail below with reference to  FIGS. 15 to 20 . 
     In the first embodiment, it is noted that the snap connection  170  for connecting the covering element  1   b  to the hinge  110  is located on the mounting plate  151 . In the second embodiment, the snap connection  270  for connecting the covering element  1   b  to the hinge  210  is located on the base plate  235  of the base plate  230 . 
     In the following, it will be described in more detail how a snap connection  470  is carried out by introducing a snap anchor  80  connected to the covering element  1   b  into a holding clip  90  connected to a hinge generally designated  410 . 
     The snap anchor  80  is generally pre-mounted onto the covering element  2   b,    1   b  and the covering element may subsequently, after installing the hinge  410 , be snapped in place. Referring back to  FIG. 1 , in which it also emerges how the frame side covering element  1   b  and sash side covering element  2   b  interact with each other, it is noted that the movement pattern of the hinge allows that the sash side covering element  2   b  is able to be retracted from its position under the frame side covering element  1   b  during the opening movement of the sash  2  relative to the frame  1 , and conversely, be inserted under the frame side covering element  1   b  at the final stage of the closing movement. 
     Referring now to  FIGS. 17 to 22 , detailed views of the snap connection  470  are illustrated. Only the snap connection  470  of the frame hinge part of the hinge  410  will be described. Generally, the snap connection of the sash hinge part may be identical. In that way, the same snap anchor  80  can be used on either of the holding clips  90 . The snap anchor  80  is thus connected to the covering arrangement  1   b,    2   b  and configured for releasable connection directly to a respective holding clip  90  integral with the hinge  10  and arranged to receive the respective snap anchor  80 . 
     Each holding clip  90  comprises a receiving portion  91  and an anchor engagement portion  92 . The receiving portion  91  of the holding clip  90  is here substantially U-shaped and comprises two opposing supporting surfaces  93  extending between a respective upper end surface  95  and the anchor engagement portion  92 . Introduction of the snap anchor  80  into the holding clip  90  is facilitated if at least one of the opposing surfaces  93  is provided with a rounded edge  94  at the transition between the respective upper end surface  95  and the supporting surface  93 . The holding clip  90  furthermore has a front side  90   a  and a back side  90   b.    
     The anchor engagement portion  92  of each holding clip  90  is in the embodiment shown formed as an offset section comprising at least one side surface  96  and a lower end surface  97 . Here, there are two symmetrically arranged side surfaces  96  to end in the lower end surface  97 , and the offset section has a front surface  98   a,  a back surface  98   b  and also an inclined upper surface  99 . 
     Turning now to a description of preferred embodiments of the snap anchor with further reference to  FIGS. 15 to 20 , the snap anchor  80  comprises a top surface  85  configured to abut a lower side of the respective covering element  1   b,    2   b,  a guide portion  81  and an engagement portion  82 . 
     The guide portion  81  of the snap anchor  80  comprises two opposing guide surfaces  83  to interact with the two opposing supporting surfaces  93  of the receiving portion  91  of the holding clip  90 . In order to facilitate the mounting process, each guide portion  81  may as shown be provided with a rounded lower edge  81   a.  Furthermore, and in particular for improving the retention of the snap anchor  80  in the holding clip  90 , a protruding side wall portion  81   b  is also provided at both sides of the guide portion  81 . 
     The engagement portion  82  comprises a tongue  88  and two legs  87  extending from the top surface  85  of the snap anchor  80  and meeting in a lower point  87   a  such that a slot  89  is formed between the legs  87  and the tongue  88 . The tongue  88  is in the embodiment shown formed integral with the guide portion  81  of the snap anchor  80  and has a central aperture  88   a.  The central aperture  88   a  is present in order to facilitate the manufacturing process. 
     The engagement between the engagement portion  82  of the snap anchor  80  and the anchor engagement portion  92  of the holding clip  90  is performed in that the slot  89  of the engagement portion  82  of the snap anchor  80  surrounds the anchor engagement portion  92  of the holding clip  90  in the mounted condition. 
     In the mounted condition, a back surface  88   b  of the tongue  88  abuts the front surface  98   a  of the offset section of the anchor engagement portion  92  of the holding clip. 
     The legs  87  of the snap anchor  80  are pre-formed with a bias in a direction away from the tongue  88 . 
     Furthermore, the snap anchor  80  comprises at least one resilient arm  86 , here two resilient arms  86 , connected at a transition portion  86   a  to the top surface  85  of the snap anchor  80  and having a free end portion  86   b.  As shown, the resilient arms  86  are in the embodiment shown located at a lower level than the top surface  85 . 
     When mounting the covering elements  1   b,    2   b  to which the snap anchors  80  have been connected, the snap anchor  80  is introduced into the holding clip  90  as indicated in the above and moved downwards in the receiving portion  91 . In order to attain the releasable connection, the engagement portion  82  is moved further downwards until the lower part of the slot  89  is located below the lower end surface  97  of the offset section of the anchor engagement portion  92 . 
     In the snap connection, a slight play is necessary in order to allow the slot  89  of the engagement portion  82  of the snap anchor  80  to be guided over the anchor engagement portion  92 . Furthermore, unavoidable tolerances in the parts of the hinge including the holding clip  90 , and in the snap anchor  80  itself, make it advantageous to incorporate resilient means into the connection. Such resilient means may take any suitable form, but here the required play and any tolerances are accommodated by the presence of the resilient arms  86  at the top surface  85  of the snap anchor  80 . Once the engagement portion  82  has been brought into engagement with the anchor engagement portion  92 , the free end portions  86   a  of the resilient arms  86  come into contact with the respective upper end surface  95  of the holding clip  90 . When the resilient legs  86  bend, the relative movement will in turn pull the legs  87  upwards and thereby ensure abutment between the lower point  87   a  with the lower end surface  97  of the anchor engagement portion  92  of the holding clip  90 . 
     In the mounted condition, and in the case of a pulling force acting on the associated covering element, either as a mechanical force when handling the window or due to wind load, the configuration of the snap anchor  80  will support the snap engagement and prevent unwarranted release from the holding clip  90  of the hinge  10 . 
     As a first measure to retain the snap engagement, this is obtained by the fact that a tensional load transmitted via the symmetrically arranged legs  87  gives rise to substantially radial reaction forces having as their centre a position in the offset section of the anchor engagement portion  92  defined by radius of curvature of the side surfaces  96  and the lower end surface  97  of the anchor engagement portion, thereby reducing stress caused by moment to an absolute minimum, leaving only tension stress in legs  87  and lower point  87   a.    
     A further factor contributing to enforcing the snap engagement in the mounted condition is the configuration of the legs  87  with a pre-formed bias to force the legs  87  as close to the centre of the snap anchor  80  as possible. In this manner, the respective line of action of a pulling force acting substantially centrally in the snap anchor  80  on one hand and the reaction force between the legs  87  and lower point  87   a  with the anchor engagement portion  92  on the other will be located close to each other and hence the resulting moment will be minimized. Optimally, the lines of actions coincide. 
     Finally, stability of the snap anchor  80  in the holding clip  90  and in turn of the associated covering element  1   b  is provided by the arrangement of suitable abutment surfaces between back sides of the legs  87  and front sides  90   a  of the holding clip  90  and between the protruding side wall portions  81   b  of the guide portion  81  and the back sides  90   b  of the holding clip  90 . In an optimal configuration, these abutment surfaces are all plane and parallel to each other; however, this may be difficult to obtain in practice due to for instance practical considerations during moulding of the snap anchor  80 . A sufficient stability is obtained if only opposing abutment surfaces are present though. 
     In case it is for some reason desirable to dismount the covering element from the hinge, release of the snap engagement is particularly easy as the snap anchor  80  as in the shown embodiment comprises a grip portion  84  formed at the ends of the legs  87  opposite the top surface  85 . 
     The connection between the snap anchor and the covering element  1   b,    2   b  may in principle be carried out in any suitable manner, including introducing a fastening element such as a screw or rivet into an opening in the top surface of the snap anchor. Such a rivet would be for instance a blind or pop rivet on the covering element  1   b,    2   b,  further provided with an external thread to engage the opening in the snap anchor. Alternatively, or additionally, the snap anchor could be connected to the covering element  1   b,    2   b  by an adhesive connection, this renders the presence of fastening means such as a screw or rivet redundant, and the snap anchor is so to say integral with the covering element. As a further alternative, the snap anchor may be connected to the covering element as described in Applicant&#39;s published WO 2018/077367 A1. 
     It is to be understood that the locking and the mounting may differ depending on the specific installation and the specific hinge. The hinge with mounting arrangement described may also be suitable for any window, including roof windows at any inclination and facade windows of any size. Also some different shapes when possible to use a hinge as the one described. 
     It should be noted that the above description of preferred embodiments serves only as an example, and that a person skilled in the art will know that numerous variations are possible without deviating from the scope of the claims. 
     LIST OF REFERENCE NUMERALS 
       1  frame
           1   a  frame side member     1   b  frame covering element       

       2  sash
           2   a  sash side member     2   b  sash covering element       

       3  pane 
       10 ′ hinge (prior art) 
       110  hinge (first embodiment) 
       130  frame hinge part
           135  base plate       

       140  sash hinge part
           145  base plate       

       150  mounting arrangement 
       151  mounting plate
           151   a  outer surface     151   b  inner surface set of coupling means of mounting arrangement       

       153  first reception member/slot 
       154  second reception member/latch element 
       155  abutment portion 
       156  leaf spring 
       157   a  spring engagement portion 
       157   b  tongue portion 1   
       157   c  guide portion 
       159  pivotal connection coupling means of remaining components of set of hinge components 
       163  first engagement member/bolt 
       164  second engagement member/shoulder portion 
       165  protruding bottom portion 
       173  hole in mounting plate for spigot 
       174  hole in mounting plate for spigot 
       160  snap connection (sash hinge part) 
       170  snap connection (frame hinge part) 
       190  movement supporting parts 
       210  hinge (second embodiment) 
       230  frame hinge part
           235  base plate       

       240  sash hinge part
           245  base plate       

       250  mounting arrangement 
       251  first mounting plate 
       252  second mounting plate set of coupling means of mounting arrangement 
       253  first reception member/slot 
       254  second reception member/latch element 
       255  abutment portion 
       257   a  spring engagement portion 
       257   b  tongue portion 
       257   c  guide portion 
       258  cover portion 
       259  pivotal connection coupling means of remaining components of set of hinge components 
       263  first engagement member/bolt 
       264  second engagement member/shoulder portion 
       265  protruding bottom portion 
       271   a  spigot on first mounting plate 
       271   b  spigot on first mounting plate 
       272   a  spigot on second mounting plate 
       272   b  spigot on second mounting plate 
       273  hole in mounting plate for spigot  271   a    
       274  hole in mounting plate for spigot  271   b    
       260  snap connection (sash hinge part) 
       270  snap connection (frame hinge part) 
       290  movement supporting parts 
       310  hinge (third embodiment) 
       350  mounting arrangement 
       351  mounting plate
           351   a  spring engagement protrusion     351   b  first cover engagement protrusion     351   c  second cover engagement protrusion       

       353  first reception member/slot 
       354  second reception member/latch element 
       358  cover
           358   a  first spring abutment portion     358   b  first engagement means     358   c  second engagement means     358   d  second spring abutment portion       

       359  pivotal connection 
     α hinge axis 
       410  hinge (fourth embodiment) 
       470  snap connection 
       80  snap anchor 
       81  guide portion
           81   a  rounded lower edge of guide portion     81   b  protruding side wall portion of guide portion       

       82  engagement portion 
       83  guide surface 
       84  grip portion 
       85  top surface 
       85   a  opening 
       86  resilient arm
           86   a  transition portion of resilient arm     86   b  free end portion of resilient arm       

       87  leg 
       87   a  lower point 
       88  tongue
           88   a  aperture in tongue     88   b  back surface of tongue       

       89  slot 
       90  holding clip 
       90   a  front side of holding clip 
       91  receiving portion 
       92  anchor engagement portion 
       93  supporting surface 
       94  rounded edge 
       95  upper end surface 
       96  side surface of anchor engagement portion 
       97  lower end surface of anchor engagement portion 
       98   a  front surface of offset section 
       98   b  back surface of offset section 
       99  inclined upper surface