EP2157265A1

EP2157265A1 - Window hinge assembly and method of mounting a sash in a frame

Info

Publication number: EP2157265A1
Application number: EP09157624A
Authority: EP
Inventors: Søren Martin Mikkelsen
Original assignee: VKR Holding AS
Current assignee: VKR Holding AS
Priority date: 2008-08-21
Filing date: 2009-04-08
Publication date: 2010-02-24
Anticipated expiration: 2029-04-08
Also published as: EP2157265B1

Abstract

The window hinge assembly comprises a first and a second window hinge (6a, 6b) adapted to connect the sash to the frame and at least one window balance arm (7a, 7b). Each window hinge comprises a first mounting bracket (14), a second mounting bracket (15) and a connecting member (16) slidingly connected to the first mounting bracket and pivotally connected to the second mounting bracket. The displacement of the connecting member (16) relative to the first mounting bracket is restricted. A bearing block (18) has a boring (19a, 19b) for the pivot pin and an insertion channel (20a, 20b) allowing radial insertion of the pivot pin into the boring from a freely accessible insertion side (21). A locking member is provided for locking the pivot pin (17) in the boring. The pivot pin has a shaft section (23) and a head section (24) having a diameter larger than the boring.

Description

The present invention relates to a window hinge assembly for mounting a sash carrying a window pane in a frame so that the sash is movable between an open position and a closed position, the window hinge assembly comprising a first and a second window hinge adapted to connect the sash at its upper corners to the frame at its upper corners, respectively, and at least one window balance arm adapted to releasably connect the sash and the frame at a distance from said upper corners, each window hinge comprising a first mounting bracket to be mounted on the frame, a second mounting bracket to be mounted on the sash and a connecting member that is slidingly connected to the first mounting bracket and pivotally connected to the second mounting bracket by means of a pivot pin, and a releasable connection being provided between the first mounting bracket and the second mounting bracket.
JP 2002 138744 discloses window hinge assembly comprising a sliding and pivotal connection between a window sash and a window frame. The hinge assembly comprises, at either side of the window assembly, a track in which a slider is displaceable. The slider is pivotally connected to the window sash, and the track is releasably connected to the window frame by means of two mounting brackets mounted at either end of the slider, respectively, on the window frame. However, it may be difficult to position and connect either end of the track to a mounting bracket, first at a first side of the window assembly and secondly at a second side of the window assembly when at the same time carrying the window sash. Furthermore, this construction is rather bulky and cannot be combined with a slim window construction.
US 5,392,494 discloses a window stay comprising a base to be mounted on a frame, a window support arm to be mounted on a sash and a link arm. The base defines a channel that receives a slider on which one end of the window support arm is pivotally mounted, thereby providing a slidable and pivotal connection. The link arm is pivotally connected to the window support arm and releasably and pivotally connected to the base. The releasable connection is formed between a pin of the base and an end cap of the link arm. In order to mount the sash on the frame, firstly the base is mounted on the frame and the window support arm is mounted on the sash. Subsequently, the slider of the window support arm is introduced into the channel of the base, and the link arm is connected to the base by means of the pin. However, the mounting operation may be difficult due to the fact that the channel receiving the slider is open at its ends, so that the slider may escape from the channel during connection of the link arm to the base. As the window sash comprising the window pane must be carried by the person fitting the window assembly during the mounting operation, it is difficult to maintain the slider in the channel when manipulating the connection of the link arm to the base. In order to connect the link arm to the base, it is required to firstly position the link arm so that the through passage of the end cap is centred in relation to the pin, and to secondly press the link arm in a transverse direction, so that the pin is pressed into engagement with the through passage. This transverse movement of the link arm may require a considerable force to be exercised by the person fitting the window assembly, when at the same time carrying the window. Therefore, the mounting procedure with this window stay may be complicated.
US 6,643,896 discloses a similar window stay, whereby a link arm is pivotally connected to a window support arm and releasably and pivotally connected to a base. The base defines a channel that receives a slider on which one end of the window support arm is pivotally mounted. Consequently, the mounting operation may be difficult due to the fact that the channel receiving the slider is open at its ends, so that the slider may escape from the channel during connection of the link arm to the base. The releasable connection between the window support arm and the base is formed between a stud on the base inserted into an aperture in the link arm. A retaining clip is slidable along the link arm by use of U-shaped side walls. A slot formed in the retaining clip has circular outlines which are designed to engage a groove on the stud. However, this snap connection may also be too weak for a heavy window. Furthermore, this snap connection procedure also comprises to different movements when at the same time carrying a heavy window.
EP 1 612 354 A2 discloses an upper articulation assembly for a turn and tilt window or door. The assembly comprises an swivel arm having a first end connected in articulated fashion to the frame and a second end slidably arranged in a guiding groove in the sash, and a scissors lever having a first end pivotally connected to the swivel arm and a second end pivotally journalled in an articulation seat of the sash. The second end of the scissors lever bears an articulation pivot pin which engages in snap-on fashion the articulation seat of the sash. However, the snap connection procedure comprises three different movements in that firstly, the articulation pivot pin must be positioned at the seat of the sash, and, at the same time, the second end of the swivel arm must be positioned at an insertion opening of the guiding groove in the sash, secondly, the articulation pivot pin must be pressed axially into the seat, whereby a spring metal element is depressed, and, at the same time, the second end of the swivel arm must be pressed into the insertion opening of the guiding groove, and thirdly, the articulation pivot pin must be slidingly displaced in the seat, in order for the spring metal element to snap behind and lock the pivot pin in the seat. Furthermore, disassembly of this snap connection is very complicated, as the spring metal element is hidden inside the seat of the sash.
The object of the present invention is to provide a robust and compact window hinge permitting easier mounting of the window sash in the frame.
In view of this object, the displacement of the connecting member relative to the first mounting bracket is restricted, the pivot pin is releasably journalled in a bearing block, the bearing block has a boring forming a bearing for the pivot pin and an insertion channel allowing radial insertion of the pivot pin into the boring from a freely accessible insertion side of the bearing block, a locking member is provided for locking the pivot pin in the boring, and the pivot pin has a shaft section and a head section having a diameter larger than the boring forming the bearing for the pivot pin.
In this way, the mounting of the window sash in the frame is easily performed by a single person by lifting and displacing the upper part of the sash, thereby hanging the first mounting brackets at the upper corners of the sash in the second mounting brackets at the upper corners of the frame, respectively, and by subsequently mounting an end of the window balance arm in an arm mounting bracket by positioning the arm accordingly and swinging the window sash towards its closed position. As the insertion side of the bearing block is freely accessible, only a single displacement of the sash may be necessary to hang the sash by means of the hinges. As the displacement of the connecting member relative to the first mounting bracket is restricted, the connecting member may be able to carry the sash until mounting of the window balance arm in its arm mounting bracket. Thereby, complicated manipulation of hinges when carrying the heavy window sash is avoided.
In a structurally particularly advantageous embodiment, the bearing block forms part of the connecting member, the pivot pin is mounted on the second mounting bracket, and the insertion channel is adapted to open upwards in the mounted position of the window hinge on the frame.
In an embodiment, the locking member has the form of an elastic plate element that is attached to the bearing block and covers the insertion channel at least partially, so that, during insertion of the pivot pin into the boring, the pivot pin may bend the elastic plate element and thereby lift part of the elastic plate element away from the bearing block, and so that the pivot pin after insertion may be retained in the boring by means of the elastic plate element. Thereby, locking of the pivot pin in the boring may be performed automatically without any separate handling steps by the person fitting the window.
In a structurally advantageous embodiment, the elastic plate element comprises an inclined section that is inclined relative to the direction of the insertion channel, so that, during insertion of the pivot pin into the boring, the pivot pin may slide against the inclined section of the elastic plate element, thereby bending the elastic plate element and lifting part of the elastic plate element away from the bearing block.
In an embodiment, the bearing block has a first wall and a second wall being mutually spaced, the first wall has a first boring and a first insertion channel and the second wall has a second boring and a second insertion channel, the shaft section of the pivot pin extends on either side of the head section of the pivot pin so that the head section may be positioned in between the first wall and a second wall of the bearing block and the shaft section may be journalled in either of the first boring and the second boring. Thereby, a better connection between the pivot pin and the bearing block may be obtained.
In an embodiment, the head section of the pivot pin has a first conical section mating a first conical section of the first boring of the first wall and a second conical section mating a second conical section of the second boring of the second wall. Thereby, an even better and stable connection between the pivot pin and the bearing block may be obtained.
In a structurally advantageous embodiment, the connecting member is formed by a plate member that is bent to form the first wall and the second wall of the bearing block, and the first wall of the bearing block forms a slider that is slidingly connected to the first mounting bracket.
In an embodiment, a flat section of the elastic plate element is attached to and abuts a flat surface of the second wall of the bearing block, and a locking hole is provided in the elastic plate element in line with the boring forming a bearing for the pivot pin so that the pivot pin may engage the locking hole in the connected state of the first mounting bracket and the second mounting bracket.
In an embodiment, the sliding connection between the connecting member and the first mounting bracket comprises a track in the form of an elongated cutout in a track plate member and a slider comprising a sliding block of friction reducing material, such as PTFE or the like, the sliding block is fastened to a slider bracket by means of at least one security rivet having a head portion with a diameter larger than the width of the elongated cutout in the track plate member, so that the slider bracket is located at a first side of the track plate member, the security rivet extends through the elongated cutout and the head portion of the security rivet is located at a second side of the track plate member. By means of the sliding block of friction reducing material, a good sliding operation may be achieved, and at the same time, due to the fact that the security rivet has a head portion with a diameter larger than the width of the elongated cutout in the track plate member, the window sash is secured to the frame, also in the case that the sliding block of friction reducing material should break as a result of an attempt to break in or for instance due to poor handling during mounting.
In an embodiment, the security rivet is sufficiently long for the slider bracket to be located at a distance of the first side of the track plate member. Thereby, it may be ensured that the sliding block of friction reducing material and not the slider bracket slides along the track plate member.
In a structurally advantageous embodiment, the track plate member forms part of the first mounting bracket, the slider bracket forms part of the slider, and the slider forms part of the connecting member.
In an embodiment, the first mounting bracket and the sliding block are so dimensioned that the sliding block may slide against the frame in the mounted state of the window hinge assembly. Thereby, tilting of the slider may be avoided.
In an embodiment, the window balance arm has a first end pivotally journalled in a first arm mounting bracket to be mounted on the frame and a second end pivotally journalled in a second arm mounting bracket to be mounted on the sash, the second end being releasably connected to the second arm mounting bracket.
The present invention further relates to a window assembly comprising a sash carrying a window pane and being mounted in a frame movable between an open position and a closed position by means of a window hinge as described above.
The present invention further relates to a method of mounting a sash carrying a window pane in a frame by means of a window hinge assembly so that the sash is movable between an open position and a closed position, whereby, in arbitrary succession, a first mounting bracket of a first window hinge is mounted at a first upper corner of the frame, a first mounting bracket of a second window hinge is mounted at a second upper corner of the frame, a second mounting bracket of the first window hinge is mounted at a first upper corner of the sash, a second mounting bracket of the second window hinge is mounted at a second upper corner of the sash, a first arm mounting bracket carrying a first end of a window balance arm is mounted on the frame at a distance from said upper corners of the frame, and a second arm mounting bracket is mounted on the sash at a distance from said upper corners of the sash. The method is characterized by mounting the sash in the frame by lifting and displacing an upper part of the sash, thereby hanging the first mounting brackets at the upper corners of the sash in the second mounting brackets at the upper corners of the frame, respectively, and by that subsequently, a second end of the window balance arm is mounted in the second arm mounting bracket by positioning the arm accordingly and swinging the window sash towards its closed position. Thereby, the above-mentioned properties may be obtained.
The present application further discloses separate invention relating to a window hinge comprising a first mounting bracket, a second mounting bracket and a connecting member that is slidingly connected to the first mounting bracket and pivotally connected to the second mounting bracket by means of a pivot pin, and a releasable connection being provided between the first mounting bracket and the second mounting bracket. The window hinge is characterized in that the pivot pin is releasably journalled in a bearing block, in that the pivot pin has a shaft section and a head section having larger diameter than the shaft section, in that the bearing block has a boring forming a bearing for the pivot pin and an insertion channel allowing radial insertion of the pivot pin into the boring, in that an elastic plate element is attached to the bearing block, covers the insertion channel at least partially and comprises an inclined section that is inclined relative to the direction of the insertion channel, so that, during insertion of the pivot pin into the boring, the pivot pin may bend the elastic plate element and thereby lift part of the elastic plate element away from the bearing block as it slides against the inclined section of the elastic plate element, and so that the pivot pin after insertion may be retained in the boring by means of the elastic plate element.
This separate invention may further be characterized in that in that the bearing block forms part of the connecting member, in that the pivot pin is mounted on the second mounting bracket, and in that the insertion channel is adapted to open upwards in the mounted position of the window hinge on the frame.
The present application further discloses a separate invention relating to a window hinge comprising a sliding connection between a connecting member and a first mounting bracket, the connecting member being connected to a second mounting bracket. The window hinge is characterized in that the sliding connection comprising a track in the form of an elongated cutout in a track plate member and a slider comprising a sliding block of friction reducing material, such as PTFE or the like, in that the sliding block is fastened to a slider bracket by means of at least one security rivet having a head portion with a diameter larger than the width of the elongated cutout in the track plate member, so that the slider bracket is located at a first side of the track plate member, the security rivet extends through the elongated cutout and the head portion of the security rivet is located at a second side of the track plate member. By means of the sliding block of friction reducing material, a good sliding operation may be achieved, and at the same time, due to the fact that the security rivet has a head portion with a diameter larger than the width of the elongated cutout in the track plate member, the window sash is secured to the frame, also in the case that the sliding block of friction reducing material should break as a result of an attempt to break in or for instance due to poor handling during mounting.
The invention will now be explained in more detail below by means of examples of embodiments with reference to the very schematic drawing, in which

Fig. 1 is a perspective view of a window assembly comprising a window hinge assembly according to the invention, in the disassembled state,
Fig. 2 is an exploded view of the second window hinge of the window hinge assembly in Fig. 1,
Fig. 3 is a perspective view of the second window hinge in Fig. 2, in the disassembled state,
Fig. 4 is a perspective view of the second window hinge in Fig. 3, in the assembled state,
Fig. 5 is an end view of the second mounting bracket of the second window hinge in Fig. 3,
Fig. 6 is a perspective view of the connecting member of the second window hinge in Fig. 3,
Fig. 7 is a perspective view of the connecting member in Fig. 6, seen from another side,
Fig. 8 is a perspective view of part of the sash on which the second mounting bracket of the second window hinge of the window hinge assembly in Fig. 1 is mounted, and
Fig. 9 is a perspective view of part of the frame on which the first mounting bracket of the second window hinge of the window hinge assembly in Fig. 1 is mounted.

Fig. 1 shows an outwardly opening window assembly 1 comprising a window sash 2 carrying a window pane 3 and being mounted in a window frame 4 movable between an open position and a closed position. The upper corners 5 of the window sash are connected to the window frame by means of a first and a second window hinge 6a, 6b according to the invention, so that the upper corners 5 of the window sash may slide vertically in relation to the window frame and may pivot about a horizontal axis. Each window hinge 6a, 6b has the form of a snap-connection for connection of the window sash to the window frame without tools.
Furthermore, the window sash 2 is connected to the window frame 4 by means of a first and a second window balance arm 7a, 7b. In Fig. 1, the window balance arms are shown before snap connection to the window sash. A first end 8 of the window balance arm 7a, 7b is pivotally journalled in a first arm mounting bracket 9 mounted on a vertical side member 13 of the window frame 4 and a second end 11 of the window balance arm is adapted to be pivotally journalled in a second arm mounting bracket 12 mounted on a side member 10 of the window sash 2. However, the first mounting bracket 9 could also be mounted on the window sash 2, in which case the second mounting bracket 12 would be mounted on the window frame 4.
The first and second window hinges 6a, 6b and the first and second window balance arms 7a, 7b together form the window hinge assembly according to the invention.
Fig. 3 and 4 show a perspective view of the second window hinge 6b in Fig. 1 in the disassembled and assembled state, respectively. The second window hinge 6b comprises a first mounting bracket 14 to be mounted on the frame 4 by means of screws or rivets as shown in Fig. 9 and a second mounting bracket 15 to be mounted on the sash 2 by means of screws or rivets as shown in Fig. 8. Furthermore, the second window hinge 6b comprises a connecting member 16 that is slidingly connected to the first mounting bracket 14 and pivotally connected to the second mounting bracket 15 by means of a pivot pin 17. The pivot pin is rotatably mounted in the second mounting bracket 15, and a bearing block 18 forming part of the connecting member 16 has a boring 19a, 19b forming a bearing for the pivot pin 17 and an insertion channel 20a, 20b allowing radial insertion of the pivot pin into the boring from a freely accessible insertion side 21 of the bearing block 18. A locking member in the form of an elastic plate element 22 is provided for locking the pivot pin 17 in the boring 19a, 19b, so that the pivot pin is releasably journalled in the bearing block 18, and a releasable connection is provided between the first mounting bracket 14 and the second mounting bracket 15.
The pivot pin 17 has a shaft section 23 and a head section 24 having a diameter larger than the boring 19 forming the bearing for the pivot pin. The bearing block 18 has a first wall 25a and a second wall 25b being mutually spaced. The first wall 25a has a first boring 19a and a first insertion channel 20a and the second wall 25b has a second boring 19b and a second insertion channel 20b. The insertion channels 20a, 20b are adapted to open upwards in the mounted position of the window hinge 6a, 6b on the frame. The shaft section 23 of the pivot pin extends on either side of the head section 24 of the pivot pin 17 so that the head section may be positioned in between the first wall 25a and a second wall 25b of the bearing block 18 and the shaft section 23 may be journalled in either of the first boring 19a and the second boring 19b. The head section 24 of the pivot pin 17 has a first conical section 26a mating a first conical section 27a of the first boring 19a of the first wall 25a and a second conical section 26b mating a second conical section 27b of the second boring 19b of the second wall 25b.
As it may be seen in Figs. 6 and 7, the connecting member 16 is formed by a plate member that is bent to form the first wall 25a and the second wall 25b of the bearing block 18, and the first wall 25a of the bearing block forms a slider 28 that is slidingly connected to the first mounting bracket 14 as explained below.
The elastic plate element 22 forming the locking member comprises a flat section that is attached to and abuts a flat surface of the second wall 25b of the bearing block by means of rivets 33, so that it covers the second insertion channel 20b. A locking hole 29 is provided in the elastic plate element in line with the boring 19a, 19b forming a bearing for the pivot pin 17, so that the pivot pin may engage the locking hole in the connected state of the first mounting bracket 14 and the second mounting bracket 15 and thereby be retained in the boring by means of the elastic plate element.
The elastic plate element 22 further comprises an inclined section 30 that is inclined relative to the direction of the insertion channels 20a, 20b, so that, during insertion of the pivot pin 17 into the boring, the pivot pin may slide against the inclined section of the elastic plate element, thereby bending the elastic plate element and lifting part of the elastic plate element away from the second wall 25b of the bearing block, so that the pivot pin may enter the locking hole 29.
The sliding connection between the connecting member 16 and the first mounting bracket 14 comprises a track in the form of an elongated cutout 37 in a track plate member 38 and the slider 28 comprising a sliding block 39 of friction reducing material, such as PTFE or the like. The sliding block 39 is fastened to a slider bracket 40 by means of two security rivets 41 having a head portion 42 with a diameter larger than the width of the elongated cutout 37 in the track plate member. The slider bracket 40 forms part of the slider 28 and thereby of the first wall 25a of the bearing block. The slider bracket 40 is located at a first side 43 of the track plate member 38, the security rivets 41 extends through the elongated cutout 37 and the head portion 42 of the security rivets is located at a second side 44 of the track plate member. Due to the fact that the security rivets have a head portion with a diameter larger than the width of the elongated cutout in the track plate member, the window sash is secured to the frame, also in the case that the sliding block of friction reducing material should break.
Because the sliding connection between the slider 28 and the first mounting bracket 14 is provided by means of the elongated and closed cutout 37 in the track plate member 38, the displacement of the connecting member relative to the first mounting bracket is restricted. This is an advantage during mounting of the window sash in the window frame, because the first mounting brackets at the upper corners of the sash may hang in the second mounting brackets at the upper corners of the frame, respectively, during the subsequent mounting of the window balance arm, thereby facilitating the mounting procedure. In order to hang the first mounting brackets 14 in the second mounting brackets 15, an upper part of the sash is lifted and displaced, thereby engaging the pivot pins 17 in the bearing block 18.
The length of the security rivets 41 is sufficient for the slider bracket 40 to be located at a distance of the first side 43 of the track plate member 38, so that a certain flexibility is obtained, whereby the first mounting bracket and the sliding block may be so dimensioned that the sliding block may slide against the frame in the mounted state of the window hinge assembly.
In order to further secure the window assembly in its closed position, a locking block 31 is mounted on the top of the second mounting bracket 15 and is adapted to engage a separate locking plate 32 mounted on the frame.

Claims

A window hinge assembly for mounting a sash (2) carrying a window pane (3) in a frame (4) so that the sash is movable between an open position and a closed position, the window hinge assembly comprising a first and a second window hinge (6a, 6b) adapted to connect the sash at its upper corners to the frame at its upper corners, respectively, and at least one window balance arm (7a, 7b) adapted to releasably connect the sash and the frame at a distance from said upper corners, each window hinge (6a, 6b) comprising a first mounting bracket (14) to be mounted on the frame (4), a second mounting bracket (15) to be mounted on the sash (2) and a connecting member (16) that is slidingly connected to the first mounting bracket (14) and pivotally connected to the second mounting bracket (15) by means of a pivot pin (17), and a releasable connection being provided between the first mounting bracket and the second mounting bracket, characterized in that the displacement of the connecting member (16) relative to the first mounting bracket (14) is restricted, in that the pivot pin (17) is releasably journalled in a bearing block (18), in that the bearing block has a boring (19a, 19b) forming a bearing for the pivot pin and an insertion channel (20a, 20b) allowing radial insertion of the pivot pin into the boring from a freely accessible insertion side (21) of the bearing block (18), in that a locking member is provided for locking the pivot pin (17) in the boring (19a, 19b), and in that the pivot pin has a shaft section (23) and a head section (24) having a diameter larger than the boring (19a, 19b) forming the bearing for the pivot pin (17).
A window hinge assembly according to claim 1, characterized in that the bearing block (18) forms part of the connecting member (16), in that the pivot pin (17) is mounted on the second mounting bracket (15), and in that the insertion channel (20a, 20b) is adapted to open upwards in the mounted position of the window hinge (6a, 6b) on the frame (4).
A window hinge assembly according to claim 1 or 2, characterized in that the locking member has the form of an elastic plate element (22) that is attached to the bearing block (18) and covers the insertion channel (20a, 20b) at least partially, so that, during insertion of the pivot pin (17) into the boring (19a, 19b), the pivot pin may bend the elastic plate element (22) and thereby lift part of the elastic plate element away from the bearing block, and so that the pivot pin after insertion may be retained in the boring by means of the elastic plate element.
A window hinge assembly according to claim 3, characterized in that the elastic plate element (22) comprises an inclined section (30) that is inclined relative to the direction of the insertion channel (20a, 20b), so that, during insertion of the pivot pin (17) into the boring (19a, 19b), the pivot pin may slide against the inclined section of the elastic plate element, thereby bending the elastic plate element and lifting part of the elastic plate element away from the bearing block (18).
A window hinge assembly according to any one of the preceding claims, characterized in that the bearing block (18) has a first wall (25a) and a second wall (25b) being mutually spaced, in that the first wall (25a) has a first boring (19a) and a first insertion channel (20a) and the second wall (25b) has a second boring (19b) and a second insertion channel (20b), in that the shaft section (23) of the pivot pin extends on either side of the head section (24) of the pivot pin so that the head section may be positioned in between the first wall and a second wall of the bearing block and the shaft section may be journalled in either of the first boring and the second boring.
A window hinge assembly according to claim 5, characterized in that the head section (24) of the pivot pin (17) has a first conical section (26a) mating a first conical section (27a) of the first boring (19a) of the first wall (25a) and a second conical section (26b) mating a second conical section (27b) of the second boring (19b) of the second wall (25b).
A window hinge assembly according to claim 5, characterized in that the connecting member (16) is formed by a plate member that is bent to form the first wall (25a) and the second wall (25b) of the bearing block (18), and in that the first wall (25a) of the bearing block (18) forms a slider (28) that is slidingly connected to the first mounting bracket (14).
A window hinge assembly according to any one of the claims 5 to 7, characterized in that a flat section of the elastic plate element (22) is attached to and abuts a flat surface of the second wall (25b) of the bearing block (18), and in that a locking hole (29) is provided in the elastic plate element (22) in line with the boring (19a, 19b) forming a bearing for the pivot pin (17) so that the pivot pin may engage the locking hole in the connected state of the first mounting bracket (14) and the second mounting bracket (15).
A window hinge assembly according to any one of the preceding claims, characterized in that the sliding connection between the connecting member (16) and the first mounting bracket (14) comprises a track in the form of an elongated cutout (37) in a track plate member (38) and a slider (28) comprising a sliding block (39) of friction reducing material, such as PTFE or the like, in that the sliding block is fastened to a slider bracket (40) by means of at least one security rivet (41) having a head portion (42) with a diameter larger than the width of the elongated cutout in the track plate member, so that the slider bracket is located at a first side (43) of the track plate member, the security rivet extends through the elongated cutout and the head portion of the security rivet is located at a second side (44) of the track plate member.
A window hinge assembly according to claim 9, characterized in that the security rivet (41) is sufficiently long for the slider bracket (40) to be located at a distance of the first side of the track plate member (38).
A window hinge assembly according to claim 9 or 10, characterized in that the track plate member (38) forms part of the first mounting bracket (14), in that the slider bracket (40) forms part of the slider (28), and in that the slider forms part of the connecting member (16).
A window hinge assembly according to claim 11, characterized in that the first mounting bracket (14) and the sliding block (39) are so dimensioned that the sliding block may slide against the frame (4) in the mounted state of the window hinge assembly.
A window hinge assembly according to any one of the preceding claims, characterized in that the window balance arm (7a, 7b) has a first (8) end pivotally journalled in a first arm mounting bracket (9) to be mounted on the frame and a second end (11) pivotally journalled in a second arm mounting bracket (12) to be mounted on the sash, the second end being releasably connected to the second arm mounting bracket.
A window assembly comprising a sash (2) carrying a window pane (3) and being mounted in a frame (4) movable between an open position and a closed position by means of a window hinge assembly according to any one of the preceding claims.
A method of mounting a sash (2) carrying a window pane (3) in a frame (4) by means of a window hinge assembly so that the sash is movable between an open position and a closed position, whereby, in arbitrary succession, a first mounting bracket (14) of a first window hinge (6a) is mounted at a first upper corner of the frame, a first mounting bracket (14) of a second window hinge (6b) is mounted at a second upper corner of the frame, a second mounting bracket (15) of the first window hinge (6a) is mounted at a first upper corner of the sash, a second mounting bracket (15) of the second window hinge (6b) is mounted at a second upper corner of the sash, a first arm mounting bracket (9) carrying a first end of a window balance arm (7a, 7b) is mounted on the frame at a distance from said upper corners of the frame, and a second arm mounting bracket (12) is mounted on the sash at a distance from said upper corners of the sash, characterized by mounting the sash (2) in the frame by lifting and displacing an upper part of the sash, thereby hanging the first mounting brackets (14) at the upper corners of the sash in the second mounting brackets (15) at the upper corners of the frame, respectively, and by that subsequently, a second end (11) of the window balance arm (7a, 7b) is mounted in the second arm mounting bracket (12) by positioning the arm accordingly and swinging the window sash towards its closed position.