GB2624024A - Compensator assembly for bi-fold door system - Google Patents

Abstract

The compensator assembly for a bi-fold door system, the compensator assembly 200 comprises: a compensator member 220 configured to pivotably connect to a swing panel of the bi-fold door system, and to pivotably connect to a supported panel of the bi-fold door system. The compensator member comprising a contact portion 222; and an alignment track comprising a guide channel 230 configured to receive the contact portion. The contact portion comprises a pair of rollers; and when, in use, the compensator member is in an aligned configuration with respect to the alignment track, there is a non-zero clearance between the pair of rollers and the guide channel. Also claimed is a method of manufacturing a compensator assembly and a bi-fold door assembly with the assembly.

Description

COMPENSATOR ASSEMBLY FOR BI-FOLD DOOR SYSTEM

[0001] The present disclosure relates to a compensator assembly for a bi-fold door system. Background [0002] Bi-fold door systems are systems comprising a plurality of door panels which fold. For example, a typical door used in domestic buildings has a door frame with a swing door panel hinged to the door frame. The swing door panel pivots about the hinges to transition between open and closed door configurations. On the other hand, in a bi-fold door system, there are a plurality of door panels which are connected up via hinges. For example, in a system with three door panels, there may be a first panel connected via hinges to the door frame, a second panel connected via hinges to the first door panel and to a third door panel. The third door panel may have one end which is connected via hinges to the second door panel and an end which is free to swing out away from the door frame.

[0003] In such a three door bi-fold configuration, a system of rollers may be provided at or close to where the second and third door panels connect to allow the three door panels to fold up. The system of roller may contact upper and/or lower tracks provided in the door frame, for example. When closed, the three door panels would be lined up. On the other hand, when fully open, the three door panels would be folded up onto one another in a kind of zig zag configuration.

[0004] In some examples, it may be desired to control the folding movement of the door panels so that the door panels do not become mis-aligned with one another. For example, it may be desired that a desired alignment is maintained so that the system of rollers can operate as intended without the door panels becoming stuck in a configuration between fully open and fully closed. Mis-alignment issues may be made worse when the door panels in question are very heavy. Therefore, there is a need to provide a system for bi-fold doors which provides for easy manipulation of the bi-fold door panels by compensating for mis-alignment issues within the bifold door system during use.

Summary

[0005] According to a first aspect of the present invention there is provided a compensator assembly for a bi-fold door system, the compensator assembly comprising: a compensator member configured to pivotably connect to a swing panel of the bi-fold door system, and to pivotably connect to a supported panel of the bi-fold door system such that the swing and supported panels are pivotable in relation to each other and in relation to the compensator member, the compensator member comprising a contact portion; and an alignment track comprising a guide channel configured to receive the contact portion, wherein: the contact portion comprises a pair of rollers; and when, in use, the compensator member is in an aligned configuration with respect to the alignment track, there is a non-zero clearance between the pair of rollers and the guide channel such that the pair of rollers are out of physical contact with the guide channel.

[0006] Optionally, the compensator assembly comprises: a post configured to be fixed to the compensator member, wherein the post is pivotably connected to the swing panel, and pivotably connected to the supported panel.

[0007] Optionally, the compensator assembly comprises: a first guide mount and a second guide mount, wherein: the first and second guide mounts are configured to be fixed to opposite sides of the post; and the first guide mount is configured to pivotably connect the post to the swing panel, and the second guide mount is configured to pivotably connect the post to the supported panel.

[0008] Optionally, each of the first and second guide mounts comprises a contact guide roller configured to roll along the alignment track.

[0009] Optionally, when the contact portion is in a mis-aligned configuration, there is physical contact between one or both rollers of the pair of rollers and an inner surface of the guide channel.

[0010] Optionally, the physical contact in the mis-aligned configuration is configured to cause a fraction of the weight of the swing panel to be supported by the alignment track via the compensator member.

[0011] Optionally, in the mis-aligned configuration, the compensator assembly is configured to cause the compensator member to cease progressing further away from the aligned configuration due to the fraction of the weight of the swing panel being supported by the alignment track, thereby causing the swing panel to cease progressing further away from a swing panel aligned configuration.

[0012] Optionally, both rollers of the pair of rollers are configured to roll such that the one or both rollers making physical contact with the inner surface of the guide channel are able to roll along the guide channel.

[0013] Optionally, the compensator member is configured such that, when in the mis-aligned configuration, the roller making physical contact being able to roll on the inner surface of the guide channel provides for movement along the alignment track to aid in the compensator member returning to the aligned configuration.

[0014] Optionally, the compensator member comprises an adjustment mechanism configured to adjust a longitudinal dimension of the compensator member such that, in use, the non-zero clearance between the pair of rollers and the guide channel in the aligned configuration is adjustable.

[0015] Optionally, the non-zero clearance between the pair of rollers and portions of the inner surface of the guide channel positioned, in use, underneath the pair of rollers is between 1.5 millimetres and 5 millimetres.

[0016] Optionally, the compensator assembly comprises: a moveable support member pivotably connected to the swing panel and pivotably connected to the supported panel; and a support track configured to engage with the moveable support member, wherein: the support track provides support against substantially all of the weight of the swing panel and the supported panel via the moveable support member, when the compensator member is in the aligned configuration; and the moveable support member is configured to move along the support track.

[0017] Optionally, the support track is configured to be arranged above ground level in use.

[0018] Optionally, the moveable support member comprises a plurality of support rollers; each support roller comprises a track channel formed in the circumferential surface of the support roller; and the track channel of each support roller is configured to engage with a tracking protrusion comprised in the support track.

[0019] According to a second aspect of the present invention, there is provided a bi-fold door system comprising the compensator assembly according to the first aspect; the swing panel and the supported panel.

[0020] According to a third aspect of the present invention, there is provided a method of use of the compensator assembly according to the first aspect, the method comprising: starting from the mis-aligned configuration, applying force to the swing panel or supported panel to urge the compensator member to move along the alignment track, and thereby cause the one or both rollers of the pair of rollers to roll on the inner surface of the guide channel.

[0021] Optionally, in the method according to the third aspect, urging the compensator member to move along the alignment track in the mis-aligned configuration causes the compensator member to move away from the mis-aligned configuration.

[0022] According to a fourth aspect of the present invention, there is provided a method of manufacturing a compensator assembly for a bi-fold door system, the method comprising: manufacturing a compensator member configured to pivotably connect to a swing panel and pivotably connect to a supported panel such that the swing and supported panels are pivotable in relation to each other and in relation to the compensator member, the compensator member comprising a contact portion, wherein manufacturing the compensator member comprises configuring the contact portion with a pair of rollers; and manufacturing an alignment track comprising a guide channel configured to receive the contact portion, wherein manufacturing the compensator member and the alignment track comprises: configuring the compensator assembly such that there is a non-zero clearance between the pair of rollers and the guide channel, such that the pair of rollers are out of physical contact with the guide channel, when, in use, the contact portion is in an aligned configuration with respect to the alignment track.

[0023] Optionally, the method according to the fourth aspect comprises: configuring the compensator member with an adjustment mechanism for adjusting a longitudinal dimension of the compensator member such that, in use, the non-zero clearance between the pair of rollers and the guide channel in the aligned configuration is adjustable.

[0024] Optionally, the method according to the fourth aspect comprises: creating an internally threaded hole in a compensator member base for receiving an externally threaded portion of the contact portion.

Brief Description of the Drawings

Examples of the present disclosure will now be described with reference to the accompanying drawings, in which: Figure 1 is a simplified schematic sketch of a bi-fold door assembly; Figure 2 is a first partial schematic side internal view of a compensator assembly, according to examples; Figure 3 is a schematic perspective view of a door frame, a supported panel and a swing panel; according to examples; Figure 4 is a schematic perspective view of the supported panel and the swing panel, and including components of the compensator assembly, according to examples; Figure 5 a schematic plan view of the components shown in Figure 4, according to

examples;

Figure 6 is a schematic perspective view of parts of the compensator assembly, according to examples; Figure 7 is a second partial schematic side internal view of a compensator assembly, according to examples; Figure 8 is a first simplified schematic sketch showing a side view of a compensator member within a guide channel, according to examples; Figure 9 is a second simplified schematic sketch showing a side view of the compensator member within the guide channel, according to examples; Figure 10 is a first simplified schematic sketch of the compensator assembly as viewed from a direction orthogonal to that of Figures 8 and 9, according to examples; Figure 11 is a second simplified schematic sketch of the compensator assembly as viewed from the direction orthogonal to that of Figures 8 and 9, according to examples; Figure 12 is a simplified schematic sketch of the compensator assembly, according to examples; Figure 13 is a schematic bottom view of a moveable support member connected to the support panel and the swing panel, according to examples; Figure 14 is a schematic perspective view showing the moveable support member connected to the support panel and the swing panel, according to examples; Figure 15 is a second partial schematic side internal view of the compensator assembly, according to examples; Figure 16 is a schematic perspective view of the compensator member and the moveable support member mounted to a post, according to examples; Figure 17 is a flow diagram illustrating a method of manufacturing a compensator assembly for a bi-fold door system, according to examples; and Figure 18 a simplified schematic plan view showing a folded arrangement of door panels; according to examples.

Detailed Description

[0025] The present disclosure relates to a compensator assembly for a bi-fold door system. Misalignment problems can arise within bi-fold door systems when door panels of the system are being folded and unfolded. Figure 1 is a simplified schematic sketch of a three door bi-fold system to illustrate problems that might arise. In the examples of Figure 1, the below described problem may arise if a compensator assembly according to the present invention is not deployed, for example. In the examples of Figure 1, there is a base panel 102. The base panel 102 is pivotably connected to a door frame 104. In these examples, the base panel 102 is pivotably connected to a supported panel 106. The supported panel 106 is supported at one end by its pivotable connection to the base panel 102. The supported panel 106 is also supported at the other end by its pivotable connection to a swing panel 108. The swing panel 108 has a free end 110 which is free to swing when the door is open.

[0026] Where the supported panel 108 and the swing panel 106 connect to one another, both the supported panel 108 and the swing panel 106 are supported by the door frame 104 at a connection region 112. Reference is here made to the "top" and "bottom" of the described door panels or door frame. These references are with respect to the prevailing orientation when the bi-fold door assembly is installed as intended in a doorway. For example, the connection region 112 comprises points of engagement between the supported and swing panels 106, 108, and the door frame 104. For example, the connection region 112 may comprise rollers fixed to the bottom of the supported panel 106, the swing panel 108 or a post pivotably connected to both the supported and swing panels 106, 108. Such bottom rollers may engage with a support track provided along the bottom of the door frame 104, for example. The connection region 112 may comprise a connection member configured to engage with a connection track provided along the top of the door frame 104, for example. For example, the retaining member may be fixed to the top of the supported panel 106, the swing panel 108 or the post which may be pivotably connected to both the supported and swing panels 106, 108. The retaining member may function to so as to allow movement of the connection region 112 along the connection track at the top. As referred to herein, the support track is a portion of the door frame 104 closest to the floor 118 and the connection track (i.e., the top track) is a portion of the door frame 104 farthest away from the floor in the "in use" arrangement. Accordingly, the connection region 112 may be configured to move along the door frame 104 as indicated by double sided arrow 114.

[0027] In these examples, the weight of the swing panel 108 is intended to be supported by the support track at the connection region 112. In these examples, substantially (within acceptable tolerances) no weight of the swing panel 108 is intended to be supported by the alignment track of the door frame 104. In these examples, the weight of the supported panel 106 is also supported by the bottom of the connection region 112.

[0028] When the swing panel 108, the supported panel 106 and the base panel 102 are pivoted out of the plane of the door frame 104, the swing panel 108 may become mis-aligned. This may, for example, occur because the free end 110 is not supported. In addition, this may occur because the connection region 112 can freely move along the door frame 104, given that the supported panel 106 and the base panel 102 are not within the plane of the door frame 104 to restrict movement of the connection region 112 closer to the base panel 102. For example, the bottom of the connection region 112 (with respect to the orientation shown in Figure 1) may move in the direction of the base panel 102, the top of the connection region 112 may move away from the base panel 102, and the free end 110 of the swing panel may tilt towards the floor 118.

[0029] For example, the amount by which the swing panel 208 tilts may depend upon the relative angle between the supported panel 106 and the swing panel 108. When the door panels 102, 106, 108 are out of the plane of the door frame 104, and there is a large angle between the supported panel 106 and the swing panel 108, the problem of tilt may occur to a relatively large degree. For example, the problem is more acute when the swing panel 108 is only just out of the plane of the door frame 104. On the other hand, when the swing panel 108 is pivoted fully towards the supported panel 106 such that the angle between these panels is as small as it can be (given the physical arrangement, dimensions, etc.), then the problem of the tilt may occur to a relatively small degree or not at all. For example, Figure 18 is a simplified schematic plan view showing the folded arrangement of the door panels in which the problem of the tilt may occur to a relatively small degree or not at all. For example, this is a consequence of the way in which and the directions in which forces due to the weights of the supported and swing panels 106, 108 act at the bottom of the connection portion 112.

[0030] Accordingly, the intended configuration for opening and closing the bi-fold door system (Figure 18) may be to create the minimum angle between the supported panel 106 and the swing panel 108 before attempting to move the connection portion 112 as indicated by the arrow 114. Accordingly, it may be intended that the connection region 112 is attempted to be moved when there is a configuration of the door panels causing minimal to no tilt of the swing panel 108, for example. Nevertheless, it may be desirable to provide an assembly to be incorporated in the bi-fold door system which alleviates the problem of tilt when the angle between the supported panel 106 and the swing panel 108 is not minimal. For example, it may be desirable to improve the usability of the system when the swing panel 108 is mis-aligned (due to the described tilt).

[0031] When the swing panel 108 is mis-aligned, a bottom 116 of the free end 110 may contact the floor 118. In other word, the swing panel 108 may become tilted towards the ground. Contact with the floor 118 may damage the floor 118 and/or the swing panel 108. Contact with the floor 118 may also inhibit the desired motion of the panel to open or close the bi-fold door. For example, the tilt may cause mis-alignment of the roller system so as the inhibit motion of the connection region 112 along the door frame 104. For example, the mis-alignment may cause rollers at the top and/or the bottom of the connection region 112 to disengage from the frame and cause door panels to fall out of the frame, or may cause other damage.

[0032] It is therefore desirable to compensate for such mis-alignment caused by the swinging out of the swing panel 108. Coming away from the specific illustrative example of Figure 1, various features and examples of the present compensator assembly for addressing this and other problems are hereafter described.

[0033] In examples, the compensator assembly comprises a compensator member configured to pivotably connected to a swing panel of a bi-fold door system, and to pivotably connect to a supported panel of the bi-fold door system such that the swing and supported panels are pivotable in relation to each other and in relation to the compensator member. In examples, the compensator member comprises a contact portion. In examples, the compensator assembly comprises an alignment track comprising a guide channel configured to receive the contact portion. In examples, the contact portion comprises a pair of rollers. The compensator member can be in an aligned configuration with respect to the alignment track. When, in use, the compensator member is in an aligned configuration with respect to the alignment track, there is a non-zero clearance between the pair of rollers and the guide channel such that the pair of rollers are out of physical contact with the guide channel.

[0034] In other words, in the aligned configuration, the rollers of the contact portion do not make physical contact with the guide channel. Accordingly, the contact portion does not support any of the weight of the door panels when in the aligned configuration with respect to the alignment track.

[0035] Figure 2 is a first partial schematic side internal view of a compensator assembly 200, according to examples. As part of the compensator assembly 200, there is provided the compensator member 220 comprising the contact portion 222. The contact portion 222 comprises the pair 224 of rollers. The pair 224 of rollers comprises a first roller 224a and a second roller 224b. In these examples, the compensator member 220 comprises a compensator base 226.

[0036] In these examples, there is provided the alignment track 228 comprising the guide channel 230. In some examples, the alignment track 228 is formed into the top portion of the door frame 204. For example, the guide channel 230 is defined in the top region of the door frame 204. The guide channel 230 is configured to receive the contact portion 222. For example, the guide channel 230 defines a space within the alignment track 228 where the contact portion 222 can be accommodated. In these examples, the guide channel 230 extends along a first axis 232 along the door frame 204. In the orientation of Figure 2, the first axis is into and out of the page. In these examples, the first axis is parallel to the direction along which the door panels are aligned when arranged end to end in the plane of the door frame 204.

[0037] As referred to herein, the pair 224 of roller form part of the contact portion 222. Each of the pair 224 of rollers is arranged along a second axis 234 perpendicular to the first axis 232. In these examples, the second axis 234 is along the direction corresponding to the thickness of the door panels when the door panels are arranged end to end in the plane of the door frame 204 (i.e., when the bi-fold door is fully closed). It should be noted that various spatial axes are referred to in order to clearly define directions of movement and of rotation/pivoting. The described axes give an indication of direction with respect to the "in use" arrangement of a bi-fold door system incorporating the compensator assembly described herein. In some examples, the location of an axis relative to an element of the described assemblies may be chosen arbitrarily. In some examples, the location of an axis may be linked to a particular element. In the accompanying drawings, indications of only the directions defined by the axes are depicted. In the drawings, no particular positions of the axes are intended to be specified, and the positions where various axes are marked and labelled are simply chosen for clarity of depiction.

[0038] In these examples, the guide channel 230 is arranged with an opening facing into the region surrounded by the door frame 204 (in other words, downwards in the "in use" arrangement). Figure 3 is a schematic perspective view of the door frame 204, the supported panel 206 and the swing panel 208. In Figure 3, there is labelled the opening 302 (see also Figures 10 and 11). The opening 302 is for receiving the contact portion 222 (not visible in Figure 3) into the guide channel 230. Figure 4 is a schematic perspective view similar to Figure 3, but omitting the portions of the door frame 204 shown in Figure 3, according to examples. Figure 5 is a schematic plan view of the components shown in Figure 4, according to examples.

[0039] It should be noted that the Figures forming part of the present disclosure are schematic, and while they illustrate various features, actual "in use" dimensions and proportions may vary. In these examples, reference may be made to a third axis 304 perpendicular to the first axis 232 and perpendicular to the second axis 234. The extent of the door panels in the third axis 304 may be larger (or smaller) as compared to other shown dimensions in Figure 3, for example.

[0040] Returning to Figure 2, in these examples, the aligned configuration of the contact portion 222 with respect to the alignment track 228 is shown. In the aligned configuration, the pair 224 of rollers do not make physical contact with any inner surface of the guide channel 230. As can be seen in Figure 2, the first and second rollers 224a, 224b do not touch the inside surfaces of the guide channel. While rollers 224a, 224b are provided on the contact portion 222, a separation (in other words a non-zero clearance) is maintained between these rollers 224a, 224b and the guide channel 230 surface when in the aligned configuration. While in the above examples, alignment of certain door panels have been referred to, the "aligned configuration" and the "misaligned configuration" as used herein refer to configurations of the compensator member 220 with respect to the alignment track. Consequently, the terms, the "aligned configuration" and the "mis-aligned configuration" also refer to the configurations of the contact portion 222 within the guide channel 230.

[0041] In some examples, there is provided a post 235 configured to be fixed to the compensator member 220. In these examples, the post 235 is pivotably connected to the swing panel 208, and pivotably connected to the supported panel 206. For example, in examples where the door panels in question are heavy, a post such as the post 235 may be deployed for providing additional structural stability to the bi-fold door assembly. In such examples, the compensator member 220 is fixed to the post 235, which corresponds to the connecting region which moves along the door frame 204. In some such examples, the post 235 comprises a rigid material such as steel, stainless steel, galvanised steel, etc., depending on the application.

[0042] Figure 6 is a schematic perspective view of parts of the compensator assembly 200, according to examples. In these examples, the compensator assembly 200 comprises a first guide mount 402 and a second guide mount 404. The first and second guide mounts 402, 404 are configured to be fixed to opposite sides of the post 235. Note that the post 235 is not shown in Figure 6 (see Figure 16). In these examples, the first guide mount 402 is configured to pivotably connect the post 235 to the swing panel 208. In these examples, the second guide mount 404 is configured to pivotably connect the post 235 to the supported panel 206. In this manner, in these examples, the compensator member 220 is pivotably connected to the swing panel 208 and the supported panel 206 via the post 235 and the first and second guide mounts 402, 404.

[0043] For example, the first and second guide mounts 402, 404 comprise hinge mechanism which connect to the respective door panels such that the respective door panels pivot relative to the guide mounts. In other examples, one or more hinge mechanisms may be provided elsewhere, for example, directly on the post 235 without the inclusion of the guide mounts 402, 404, or directly on the compensator member 220. The skilled in the art appreciate the typical constructions of hinge mechanisms in the context of doors.

[0044] In some examples, each of the first and second guide mounts 402, 404 comprises a contact guide roller 406 configured to roll along the alignment track 228. For example, the contact guide roller 406 is a part of the respective guide mount which makes contact with the alignment track 228 and rolls along the alignment track 228 such that the movement along the door frame 204 is facilitated in the desired manner (e.g., smooth movement). In some examples, in the aligned configuration, there may little or no contact between the guide rollers 406 and a part of the alignment track 228. In some such examples, such contact may be established and have an effect on the movement of the connection region 212 when there is the mis-aligned configuration. In some examples, there is contact between the guide rollers 406 and the alignment track even in the aligned configuration.

[0045] In the examples of Figure 6, the first guide mount 402 comprises two contact guide rollers 406, and the second guide mount 404 comprises two contact guide rollers 406 as well. In these examples, the contact guide rollers 406 are aligned such that their rotation axis is aligned with (parallel to) the third axis 304. In some examples, the contact guide rollers 406 contact and roll along the sides of the opening 302 into the guide channel 230.

[0046] In the above description, the aligned configuration of the compensator member 220 with respect to the alignment track 228 has been referred to. In the examples of Figure 2, the aligned configuration is shown. As previously described, the aligned configuration is defined as a configuration in which there is a non-zero clearance between the pair 224 of rollers 224a, 224b and the guide channel.

[0047] The contact portion 222 may take up a mis-aligned configuration with respect to the alignment track 228 (and therefore a mis-aligned configuration within the guide channel 230).

For example, when the contact portion 222 is in the mis-aligned configuration, there is physical contact between one or both of the rollers 224a, 224b of the pair 224 of rollers and an inner surface of the guide channel 230. In other words, there is an instance of zero clearance between one or both of the rollers 224a, 224b and the inner surface of the guide channel 230 in the mis-aligned configuration.

[0048] As described above, the compensator member 220 (which comprises the contact portion 222) is pivotably connected to the swing panel 208. Figure 7 is a simplified schematic sketch of a bi-fold door system 500 which incorporates an example of the compensator assembly 200, according to examples. The assembly shown in Figure 7 comprises three door panels, however, the compensator assembly 200 may be deployed on bi-fold door systems with a different number of door panels. Note that Figure 7 is simplified and certain components (e.g., the compensator member 220) are not shown. Figure 7 is similar to Figure 1 discussed above, however, in Figure 7 the alignment of the swing panel 208 is different when the swing panel 208 is pivoted out of the plane of the door frame 204. The difference is that the free end 210 of the swing panel 208 does not contact the floor 218 due to the function of the compensator assembly 200, described in more detail below. In the examples of Figure 7, there is a base panel 202 pivotably connected (for example, via hinges) to the door frame 204 at a frame hinge end 501. Also, there is a supported panel 206 and a swing panel 208. In other examples, there may be additional panels between the base panel 202 and the supported panel 206. All the door panels 202, 206, 208 are pivotably connected to one another, while the swing panel 208 has a free end 210 not connected/supported by another element such that it can swing out of the plane of the door frame 204. The supported panel 206 is pivotably connected to the swing panel 208 at the connection region 212. The connection region 212 comprises the points of engagement between the supported and swing door panels 206, 208, and the door frame 204. For example, the connection region 212 comprises the compensator member 220, which as described above, engages with the guide channel 230.

[0049] In order for the bi-fold door system 500 to open and close, the connection region 212 is moved along the first axis 232 towards and away from the frame hinge end 501 On other words towards and away from the base panel 202). To achieve this movement, the base panel 202 pivots relative to the door frame at the frame hinge end 501, and the supported panel 206 and base panel 202 pivot relative to one another, for example. According to the intended use of the bi-fold door system 500, the swing panel 208 is to be pivoted fully towards the supported panel 206. When the swing panel 208 is pivoted fully towards the supported panel 206, the supported panel 206 and swing panel 208 have surfaces substantially facing one another. In this intended configuration, various components of the bi-fold door assembly 500 remain in an alignment which allows relatively easy movement of the connection region 212.

[0050] For example, there may be relatively easy movement when opposite ends of the connection region are aligned close to parallel (or at parallel) with the frame hinge end 501. For example, in the "in use" configuration, this means vertically aligned. However, if there is a tilt such that a bottom of the connection region is not vertically aligned with the top of the connection region, it may become relatively more difficult to move the connection region 212 along the first axis 232.

[0051] For example, the swing panel 208 is intended to pivot about the third axis 304 (by the arrangement of hinges to line up with the third axis 304, for example). In the examples of Figure 7, the swing panel 208 swings out of the page initially. Pivoting exclusively about the third axis 304 means that the distance between a part of the swing panel (e.g., the part of the free end closest to the floor) and the floor should not substantially (within acceptable tolerances -and assuming a flat and level floor) vary. In normal use, it is not intended that the separation between the swing panel 208 and the floor should change. For example, in normal use, it is not intended that the free end 210 of the swing panel contact the floor 218. Some clearance is intended to be maintained between the free end 210 (i.e., the bottom of the free end 210) of the swing panel 208 and the floor 218. For simplicity of explanation, these examples assume that the floor 218 is substantially flat and level.

[0052] However, the forces generated when the swing panel pivots away from the plane of the door frame 204 may cause a tilt in the swing panel 208 which may urge the free end 210 of the swing panel 208 to become closer to/contact the floor 218 (as described in the context of Figure 1). For example, the compensator assembly 200 may counteract this effect. In these examples, in the aligned configuration, the alignment track 228 does not support substantially any of the weight of the swing panel 208. Instead, there is provided a support track 502, at which substantially (within acceptable tolerances) the entire weight of the swing panel 208 and the supported panel 206 is supported. For example, there may be provided a movable support member (described in more detail further below) through which the weight of the swing panel 208 and the supported panel 206 is supported, positioned within the connection region 212 as indicated by 504. The connection region 212 is the region where the supported panel 206 connects to the swing panel 208. The portion 504 is the portion of the connection region 212 towards the floor 218 when in the "in use" arrangement. The portion 504 where the movable support member is provided may be referred to as the bottom portion 504 of the connection region 212. In the configuration shown in Figure 7, the three door panels 202, 206, 208 are out of the plane of the door frame 204. In this configuration, the first panel 202 and the supported panel 206 are not aligned within the door frame 204 so as to inhibit the movement of the bottom portion 504 towards the base panel 202. Therefore, when the swing panel 208 pivots away from the plane of the door frame 204, the bottom portion 504 may move closer to the base panel 202.

[0053] Also, the compensator member 220 may move in the opposite direction to the movement of the bottom portion 504. For example, the compensator assembly may move away from the base panel 202. Substantially no weight (within acceptable tolerances) is supported by the alignment track 228.

[0054] Gravity acts on the free end 210 of the swing panel (which is unsupported). In addition, the whole weight of the swing panel 208 is supported by the support track 502 at the bottom portion 504 of the connection region 212. The combination of these two factors causes the described movement of the bottom portion 504 of the connection region 212 and the compensator member 220 (which is at an upper portion of the connection region 212) in opposite directions.

[0055] In this case, the axis about which the swing panel 208 is pivotable via hinges itself may tilt relative to the third axis 304 and may no longer be parallel to the third axis 304. For example, the hinges connecting to the swing panel 208 may become tilted such that they are no longer parallel to the third axis 304. This problematic tilt of the swing panel 208 may occur due to pivoting about the second axis 234. In this case, the compensator member 220 may also tilt in a corresponding manner because it is connected to the swing panel 208. Accordingly, the contact portion 222 tilts within the guide channel 230. \Mien this tilt becomes extreme enough for the rollers 224a, 224b to contact the inner surface of the guide channel 230, the described misaligned configuration is achieved. Reference is made to the tilt" and the like herein. Such references are to the described tilt of the swing panel 108 about the first axis 232 and the second axis 234. Pivoting on hinges as intended is not included in the undesirable "tilt" being addressed.

Such references are also to the described tilt of the compensator member 220 (and to the components thereof such as the contact portion 222) because the compensator 220 is connected to the swing panel 108.

[0056] The following description further illustrates the above-described tilting resulting in the mis-aligned configuration. Figure 8 is a first simplified schematic sketch showing a side view from the second axis 234 of the compensator member 220 within the guide channel 230, according to examples. In the examples of Figure 8, the contact portion 222 is in the aligned configuration. Figure 9 is a second simplified schematic sketch showing a side view from the second axis 234 of the compensator member 220 within the guide channel 230, according to examples. In the examples of Figure 9, the compensator member 220 has tilted about the second axis 234. In these examples, the tilt about the second axis 234 results in the rollers 224a, 224b contacting the inner surface of the guide channel 230.

[0057] Figure 10 is a first simplified schematic sketch of the compensator assembly 200 as viewed from the first axis 232, according to examples. In the examples of Figure 10, the contact portion 222 is in the mis-aligned configuration. In these examples, the compensator member 220 (of which the contact portion 222 is a part) has tilted about the second axis 234. In these examples, both the first roller 224a and the second roller 224b contact the inner surface 802 of the guide channel 230. More specifically, the first roller 224a contacts a first inner surface portion 802a which is a portion of the inner surface 802 closest to the first roller 224a (with respect to the third axis 304) and towards the opening 302. Furthermore, the second roller 224b contacts a second inner surface portion 802b which is a portion of the inner surface 802 closest to the second roller 224b (with respect to the third axis 304) and towards the opening 302. Basically, the rollers 224a, 224b contact the bottom part (with respect to the "in use" arrangement) of the inner surface 802 of the guide channel.

[0058] As previously described, in the aligned configuration of the compensator member 220, there is a non-zero clearance between the pair 224 of rollers and the guide channel 230. More specifically, there is a non-zero clearance between the first roller 224a and the first inner surface portion 802a. And, there is a non-zero clearance between the second roller 224b and the second inner surface portion 802b. In other words, there is a non-zero clearance between the pair 224 of rollers and an inner surface of the guide channel positioned, in use, underneath the pair 224 of rollers. In some specific examples, the non-zero clearance between the pair 224 of rollers and the inner surface 802 of the guide channel positioned, in use, underneath the pair of rollers is between 1.5 millimetres and 5 millimetres. In some examples, the clearance is between 2 and 3 millimetres. The clearance may be chosen depending on the desired manner of functioning (e.g., at what amount of tilt should the mis-aligned configuration exit).

[0059] In some examples, the physical contact in the mis-aligned configuration causes a fraction of the weight of the swing panel 208 to be supported by the alignment track 228 via the compensator member 220. For example, the fraction is such that most of the weight is still supported by the support track 502. In some examples, the fraction amounts to less than 25%. In some examples, the fraction amounts to less than 10%. In some examples, the fraction amounts to less than 5%. However, these are merely examples of fractions and the disclosure is not so limited.

[0060] For example, as described above, it is intended that the weight of the swing panel be supported by the support track 502 at the bottom region 504 of the connection region 212. As described above, when the door panels 202, 206, 208, are out of the plane of the door frame 204, the bottom portion 504 may move closer to the base panel 202 along the support track 502 while the compensator member 220 moves away from the base panel 202 along the alignment track 228. In addition, the swing panel 208 may tilt about an axis parallel to the second axis 234.

[0061] However, when in the mis-aligned configuration, the rollers 224a, 224b contact the inner surface 802 of the guide channel 230 in these examples. In these examples, due to this contact, a fraction of the weight becomes supported by the alignment track 228. In these examples, in the mis-aligned configuration, the fraction of the weight of the swing panel 208 being supported by the alignment track 228 causes the compensator member 220 to cease progressing further away from the aligned configuration, thereby causing the swing panel 208 to cease progressing further away from a swing panel aligned configuration. The swing panel 208 aligned configuration is a configuration in which the described tilt problem does not occur.

[0062] This change in the distribution of where the weight of the swing panel 208 is supported, alleviates the forces causing the bottom portion 504 to be urged towards the base panel 202 along the support track 502 and the compensator member 220 to be urged away from the base panel 202 along the alignment track 228. Accordingly, a fraction of the weight being supported by the alignment track 228 alleviates the forces causing the compensator member 220 to be urged away from the base panel 202 along the alignment track 228. In this manner, the compensator member 220 may cease progressing further away from the aligned configuration.

Therefore, in these examples, the compensator assembly 200 provides alleviation of the tilting of the swing panel 208 when contact portion 222 is in the mis-aligned configuration within the guide channel 230.

[0063] The following are some advantages of alleviating the tilting of the swing panel 208. For example, alleviating the filling of the swing panel 208 may advantageously avoid contact of the free end 210 of the swing panel 208 with the floor 218. Advantageously, this may avoid damage to the swing panel 208 during movement, or otherwise. Advantageously, avoid contact with the floor may mean the swing panel 208 can be moved by a user with relative ease.

[0064] Furthermore, it will be appreciated that in order to open the door panels 202, 206, 208, the connection region 212 is to be moved along the first axis 232 towards the base panel 202, as described above. As described above, the connection region 212 may be moved relatively easily when the connection region 212 is aligned "in use" vertically. When there is tilt of the swing panel as described, the connection region 212 is not in vertical alignment. For example, the connection region 212 can be out of vertical alignment enough for the contact portion 222 to be in the misaligned configuration. The more the connection region 212 is out of vertical alignment, the more difficult to move the connection region along the first axis 232. Accordingly, alleviating the tilt as described alleviates the lack of vertical alignment of the connection region 212, thereby advantageously making it easier to open and close the bi-fold door system 500.

[0065] In examples, the compensator assembly 200 may be configured so that the mis-aligned arrangement occurs at a particular amount of tilt of the swing panel 208. In this manner, a limit may be placed on how much tilt will be experienced by the relevant structures. Some amount of tilt may be acceptable depending on the application while still achieving the advantages described herein.

[0066] In some examples, both rollers 224a, 224b of the pair 204 of rollers are configured to roll such that the roller 224a, 224b making physical contact with the inner surface 802 of the guide channel 230 is able to roll along the guide channel 230. As described above, one or both of the rollers 224a, 224b may contact the inner surface 802 when in the mis-aligned configuration. Examples relating to only one of the rollers 224a, 224b contacting the inner surface 802 of the guide channel 230 are described further below.

[0067] In some examples, the described rolling may assist in movement of the connection region 212 along the first axis 232 when in the mis-aligned configuration.

[0068] For example, the compensator member 220 is configured such that, when in the mis-aligned configuration, the roller 224a, 224b which makes physical contact being able to roll on the inner surface 802 of the guide channel 230 provides for movement along the alignment track 228 to aid in the compensator member 220 returning to the aligned configuration. In other words, whichever roller contacts the inner surface 802 can roll along the inner surface 802. This aides in the compensator member 220 moving along the alignment track 228 rather than becoming stuck in the guide channel 230 due to the physical contact with the guide channel 230.

[0069] For example, the compensator member 220 may have to move along the alignment track 228 to move out of the mis-aligned configuration and back towards the aligned configuration within the guide channel 230. For example, to reverse tilting of the swing panel 208 (and therefore tilt of the compensator member 220) that may have occurred, the compensator member 220 may be moved along the alignment track 228 [0070] Accordingly, the roller 224a, 224b advantageously provide continued operation of the bifold door system even when the mis-aligned configuration exists. Also, advantageously, the rollers 224a, 224b may assist in coming out of the mis-aligned configuration.

[0071] In some examples, during movement of the connection region 212, the mis-aligned configuration may persist while the connection region 212 moves along the first axis 232. For example, the connection region 212 may be moved along the first axis 232 while the mis-aligned configuration is maintained. In some examples, the compensator member 220 may move out of the mis-aligned configuration when the connection region 212 is moved along the first axis 232, and may keep returning to the mis-aligned configuration. In some examples, the compensator member 220 may move out of the mis-aligned configuration when the connection region 212 is moved along the first axis 232, and may continue to be in the aligned configuration as the connection region 212 continues to move further. The particular scenario which occurs may depend on factors such as physical dimensions of the various components (e.g., the contact portion 222, the guide channel 230, the door panels 202, 206, 208, etc.), and/or the weight of the various components such as the swing panel 208, and/or the particular angle between the supported panel 206 and the swing panel 208, for example.

[0072] In the examples of Figure 10, both the first and second rollers 224a, 224b contact the inner surface 802. In these examples, tilt of the compensator member 220 occurs primarily about the second axis 234. In these examples, the swing panel 208 may only be slightly out of the plane of the door frame 204. However, as the swing panel 208 swings open further such that the swing panel 208 pivots further away from the plane of the door frame 204, there may be a component of the tilt of the swing panel about the first axis 232.

[0073] Figure 11 is a second simplified schematic sketch of the compensator assembly 200 as viewed from the first axis 232, according to examples. In these examples, the swing panel 208 has pivoted to a point such that the swing panel 208 is pivoted about the first axis 232, in addition to being pivoted about the second axis 234 as described previously. In the examples of Figure 11, the compensator member 220 has pivoted about second axis 234 such that there is contact between a roller and the inner surface 802. Also, in these examples, the compensator member 220 has pivoted about the first axis 232 such that the first roller 224a contacts the first inner surface portion 802a, but the second roller 224b does not contact the inner surface 802. In the examples, the swing panel has pivoted on the side of the first roller 224a, for example, as roughly depicted using dashed lines.

[0074] Door systems such as the bi-fold door system 500 are typically designed such that the swing panel swings out to one side of the door frame, but not the other. However, in examples where the swing panel 208 swings out to the opposite side of what is depicted in Figure 11, the second roller 224b may contact the second inner surface portion 802b while the first roller 224a does not contact the inner surface 802. In either set of examples, the compensator member 220 functions in a similar manner. For example, when there is physical contact, a fraction of the weight of the swing panel 208 becomes supported by the alignment track 228 such that progress away from the aligned configuration is ceased. Also, for example, the one roller being rollable on the inner surface 802 provides the above-described effects and advantages (such as, for example, providing movement of the connection region 212 along the first axis 232 in the misaligned configuration).

[0075] For example, when there is pivoting of the swing panel 208 about the first axis 232, the contact guide rollers of the compensator member 220 may press up against an adjacent surface of the alignment track 228. For example, this pressing up may transfer additional weight of the swing panel 208 to the alignment track 228 and assist in the described alleviation provided by contact of the first and second rollers 224a, 224b of the contact portion 222.

[0076] In some examples, the compensator member 220 comprises an adjustment mechanism configured to adjust a longitudinal dimension of the compensator member 220. The adjustment is such that, in use, the non-zero clearance between the pair 224 of rollers and the guide channel in the aligned configuration is adjustable. In other words, the longitudinal dimension of the compensator member 220 is adjustable such that the position of the contact portion 222 within the guide channel 230 can be adjusted. For example, the longitudinal dimension is in a direction perpendicular to a separation between the first and second roller 224a, 224b. For example, in the "in use" arrangement, when the first and second rollers are aligned along the second axis 234 and are at the same position with respect to other orthogonal axes, the longitudinal dimension is aligned along the third axis 304.

[0077] Figure 12 is a simplified schematic sketch of the compensator member 220, according to examples. In these examples, the compensator 220 comprises the compensator base 226 which connects to the contact portion 222. In these examples, there is provided the adjustment mechanism 1004. The adjustment mechanism 1004 may be any suitable mechanism which can be used to adjust the separation between two connected components. As one of many possible examples, the adjustment mechanism 1004 may comprise an external thread member provided on the contact portion 222. For example, the external thread member may be a rod with an external thread fixed to the contact portion 222. In these examples, the compensator base 226 may comprises an orifice with an internal thread for engaging with the external thread of the external thread member. For example, the longitudinal dimension [maybe adjusted by screwing the external thread more or less into the internal thread of the orifice. It should be noted that Figure 12 does not necessarily specify proportions between components, but is instead schematic. The same is true with the remaining figures.

[0078] For example, when the desired longitudinal dimension is found, one or more nuts may be used to fix the relative position of the external and internal threads. Those skilled in the art will appreciate other mechanisms which may be used. For example, a clamp and release type mechanism may be used to clamp together the contact portion 222 and the compensator base 226 at different separations. For example, a spring-loaded latch type mechanism engageable at different positions may be used, and the like.

[0079] As previously described, there may be provided a moveable support member at the bottom portion 504 of the connecting region 212. For example, the moveable support member may be provided as part of the compensator assembly 200. Figure 13 is a schematic bottom view of the moveable support member 1302 connected to the support panel 206 and the swing panel 208, according to examples. Figure 14 is a schematic perspective view showing the moveable support member 1302 connected to the support panel 206 and the swing panel 208, according to examples. In these examples, there is provided the moveable support member 1302 pivotably connected to the swing panel 208 and pivotably connected to the supported panel 206.

[0080] In some examples, the compensator assembly also comprises the support track 502 configured to engage with the moveable support member 1302. Figure 15 is a second partial schematic side internal view of a compensator assembly 200, according to examples. In the examples of Figure 15, there is provided the support track 502. As previously described, in the examples described herein, the weight of the supported and swing panels is intended to be supported by the support track 502 which forms the bottom part of the door frame 204 in use. In these examples, the support track 502 provides support against substantially (within acceptable tolerances) all of the weight of the swing panel 208 and the supported panel 206 via the moveable support member 1302, when the compensator member 220 is in the aligned configuration. In these examples, the moveable support member 1302 is configured to move along the support track 502.

[0081] For example, the moveable support member 1302 comprises a set of rollers which roll along the support track 502. In some examples, the support track 502 is configured to be arranged above ground level in use.

[0082] Those skilled in the art will appreciate that the weight of the panels of a bi-fold door system can be supported by the top part of the door frame, or the bottom part of the door frame. In some typical examples when the weight is supported by the bottom part of the door frame (such as a bottom track), the bottom track is installed below ground level. For example, a channel may be created in the ground. For example, said channel penetrates into the ground, and the bottom track is installed into the channel. A set of bottom rollers is then inserted into the channel below ground to engage with the bottom track. As an example, this arrangement may avoid disengagement of the rollers from the bottom track when, for example, there is tilt of the swing panel (among other examples). However, there may be disadvantages to this known arrangement. For example, it may add complication to create a channel below ground level and instaal a bottom track there. Also, for example, the channel penetrating the ground may collect dirt and debris, and may require regular cleaning and maintenance. Malfunctions may regularly occur due to the debris, for example.

[0083] Those skilled in the art will appreciate that in some typical examples, weight may be supported by a top track provided at the top of the door frame. In such arrangements, above ground bottom tracks may be used as disengagement from a bottom track may be less adverse in this scenario. However, a disadvantage of this arrangement may be adverse effects on the part of the building above the door frame. This disadvantage may be exacerbated if the door panels are relatively heavy, for example.

[0084] However, the compensator assembly disclosed herein provides that an above ground support track 502 can be deployed at the bottom of the door frame 204 which supports the weight of the relevant panels, so that the problem of adverse effects on the building due to a weight bearing top track does not occur. In addition, there is compensation for tilt provided at the top of the door frame (by virtue of the compensator member 220 and its interaction with the alignment track 228) so that the system can be deployed without relying on a below ground channel for a bottom track to be installed therein. In other words, the disclosed systems provide unique benefits by providing a unique way of providing tilt compensation (or alleviation).

[0085] In the examples of the Figures, the moveable support member 1302 comprises a plurality of support rollers 1304. For example, the moveable support member 1302 may comprise one or more pairs of support roller 1304. For example, each pair of support rollers 1304 may be provided on a corresponding axle. In some examples, the axle may comprise a gimble arrangement configured to allow pivoting of the axle relative to the swing panel 208, for example. For example, the gimble arrangement may allow the support rollers 1304 to remain engaged with the support track 502 when there is some pivoting of the swing panel 208 about the first axis 232 (e.g., as depicted in Figure 11). In these examples, the support track 502 takes the weight of the relevant door panels via the support rollers 1304. In these examples, the support rollers 1304 are oriented such that their axis of rotation is parallel to the second axis 234.

[0086] In some examples, each support roller 1304 comprises a track channel 1306 formed in the circumferential surface of the support roller 1304 in question. In other words, the track channel 1306 is formed so as to effectively create a trough in the surface of the roller which rolls along another surface. In these examples, the support track 502 comprises tracking protrusions 1504 configured to engage with the track channels 1306. For example, the track channel 1306 of each support roller 1304 is configured to engage with a tracking protrusion 1504 comprised in the support track 502. For example, the support rollers 1304 engage with the tracking protrusions 1504 via the track channels 1306. For examples, the tracking protrusions 1504 have a complimentary shape to the track channels 1306. The engagement of the track channels 1306 with the tracking protrusions 1504 provide the desired alignment of the moveable support member 1302 with the support track 502, for example. In this manner, the moveable support member 1302 engages with the support track 502. The moveable support member 1302 may move along the support track 502 along the first direction 232.

[0087] The moveable support member 1302 may comprise one or more moveable member contact rollers 1308. In these examples, the moveable support member 1302 comprises a plurality of moveable member contact rollers 1308. In these examples, the moveable member contact rollers 1308 are oriented, in use, such that their axis of rotation is parallel to the third axis 304. The moveable member contact rollers 1308 may roll along appropriately oriented surface provided on the support track 502, for example, to assist in the movement of the moveable support member 1302 along the support track 502 [0088] Figure 16 is a schematic perspective view of the compensator member 220 and the moveable support member 1302 mounted to the post 235, according to examples. In these examples, the first and second guide mounts 402, 404 are shown (which provide the pivotable connection of the compensator member 220 to the relevant door panels). In these examples, there may also be a third guide mount 1602 and a fourth guide mount (not shown in Figure 16) to pivotably connect the moveable support member 1302 to the supported and swing panels 206, 208. For example, the moveable support member 1302 may comprise the third and fourth guide mounts.

[0089] In some examples, there is provided a bi-fold door system comprising the compensator assembly according to any of the described examples, the swing panel and the supported panel.

In examples, the bi-fold door system may have a larger number of door panels. For example, supported panel is the panel pivotably connected to the swing panel. Advantageously, a bi-fold door system may be provided which puts into practice the various technical advantages provided by the described examples of the compensator assembly.

[0090] For example, there may be provided a method of use of the compensator assembly according to any of the described examples. In examples, the method of use may comprise, starting from the mis-aligned configuration, applying force to the swing panel or supported panel to urge the compensator member to move along the alignment track, and thereby cause the one or both rollers of the pair of rollers to roll on the inner surface of the guide channel. For example, urging the compensator member to move along the alignment track in the mis-aligned configuration may cause the compensator member to move away from the mis-aligned configuration.

[0091] For example, there may be provided a method of manufacturing a compensator assembly for a bi-fold door system. Figure 17 is a flow diagram illustrating a method 1700 of manufacturing a compensator assembly for a bi-fold door system, according to examples. It should be noted Figure 17 should not be seen to specify any particular order for processes to be performed For example, the method 1700 may be used for manufacturing the compensator assembly according to any of the examples described herein.

[0092] At block 1702 of the method 1700, a compensator member is manufactured which is configured to pivotably connect to a swing panel and pivotably connect to a supported panel such that the swing and supported panels are pivotable in relation to each other and in relation to the compensator member, and such that the compensator member comprises a contact portion. As part of block 1702, manufacturing the compensator member comprises configuring the contact portion with a pair of rollers.

[0093] At block 1704 of the method 1700, an alignment track is manufactured which comprises a guide channel configured to receive the contact portion.

[0094] More specifically in the method 1700, manufacturing the compensator member and the alignment track comprises configuring the compensator assembly such that there is a non-zero clearance between the pair of rollers and the guide channel such that the pair of rollers are out of physical contact with any inner surface of the guide channel, when, in use, the contact portion is in an aligned configuration with respect to the alignment track.

[0095] Those skilled in the art will appreciate the various techniques that may be used to make components for bi-fold door systems, for example, using metals, plastics such as polyvinyl chloride, wood and the like. Materials and associated techniques may be chosen according to the particular component being manufactured. For example, the materials and techniques used are suitable for providing the functions described herein, and suitable for the dimensions and weights involved in bi-fold door systems. In some examples, 3D printing materials and techniques may be used.

[0096] In some examples, the method 1700 further comprises configuring the compensator member with an adjustment mechanism for adjusting a longitudinal dimension of the compensator member such that, in use, the non-zero clearance between the pair of rollers and the guide channel in the aligned configuration is adjustable. In some examples, the method comprises creating an internally threaded hole in a compensator member base for receiving an externally threaded portion of the contact portion. For example, the method comprises manufacturing the above described external threaded member provided on the contact portion 222 and an internally threaded orifice on the compensator base 226. Those skilled in the art will appreciate the methods of creating threads on components.

[0097] Attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.

[0098] All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.

[0099] Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.

[0100] The invention is not restricted to the details of the foregoing example(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims (20)

1. CLAIMS1. A compensator assembly for a bi-fold door system, the compensator assembly comprising: a compensator member configured to pivotably connect to a swing panel of the bi-fold door system, and to pivotably connect to a supported panel of the bi-fold door system such that the swing and supported panels are pivotable in relation to each other and in relation to the compensator member, the compensator member comprising a contact portion; and an alignment track comprising a guide channel configured to receive the contact portion, wherein: the contact portion comprises a pair of rollers; and when, in use, the compensator member is in an aligned configuration with respect to the alignment track, there is a non-zero clearance between the pair of rollers and the guide channel such that the pair of rollers are out of physical contact with the guide channel.
2. 2. The compensator assembly according to claim 1, comprising: a post configured to be fixed to the compensator member, wherein the post is pivotably connected to the swing panel, and pivotably connected to the supported panel.
3. 3. The compensator assembly according to claim 2, comprising: a first guide mount and a second guide mount, wherein: the first and second guide mounts are configured to be fixed to opposite sides of the post; and the first guide mount is configured to pivotably connect the post to the swing panel, and the second guide mount is configured to pivotably connect the post to the supported panel.
4. 4. The compensator assembly according to claim 3, wherein: each of the first and second guide mounts comprises a contact guide roller configured to roll along the alignment track.
5. 5. The compensator assembly according to any one of the preceding claims, wherein: when the contact portion is in a mis-aligned configuration, there is physical contact between one or both rollers of the pair of rollers and an inner surface of the guide channel.
6. 6. The compensator assembly according to claim 5, wherein: the physical contact in the mis-aligned configuration is configured to cause a fraction of the weight of the swing panel to be supported by the alignment track via the compensator member.
7. 7. The compensator assembly according to claim 6, wherein: in the mis-aligned configuration, the compensator assembly is configured to cause the compensator member to cease progressing further away from the aligned configuration due to the fraction of the weight of the swing panel being supported by the alignment track, thereby causing the swing panel to cease progressing further away from a swing panel aligned configuration.
8. 8. The compensator assembly according to any one of claims 5 to 7, wherein: both rollers of the pair of rollers are configured to roll such that the one or both rollers making physical contact with the inner surface of the guide channel are able to roll along the guide channel.
9. 9. The compensator assembly according to claim 8, wherein: the compensator member is configured such that, when in the mis-aligned configuration, the roller making physical contact being able to roll on the inner surface of the guide channel provides for movement along the alignment track to aid in the compensator member returning to the aligned configuration.
10. 10. The compensator assembly according to any one of the preceding claims, wherein: the compensator member comprises an adjustment mechanism configured to adjust a longitudinal dimension of the compensator member such that, in use, the non-zero clearance between the pair of rollers and the guide channel in the aligned configuration is adjustable.
11. 11. The compensator assembly according to any one of the preceding claims, wherein: the non-zero clearance between the pair of rollers and portions of the inner surface of the guide channel positioned, in use, underneath the pair of rollers is between 1.5 millimetres and 5 millimetres
12. 12. The compensator assembly according to any one of the preceding claims, comprising: a moveable support member pivotably connected to the swing panel and pivotably connected to the supported panel; and a support track configured to engage with the moveable support member, wherein: the support track provides support against substantially all of the weight of the swing panel and the supported panel via the moveable support member, when the compensator member is in the aligned configuration; and the moveable support member is configured to move along the support track.
13. 13. The compensator assembly according to claim 12, wherein: the support track is configured to be arranged above ground level in use.
14. 14. The compensator assembly according to any one of claim 12 or claim 13, wherein: the moveable support member comprises a plurality of support rollers; each support roller comprises a track channel formed in the circumferential surface of the support roller; and the track channel of each support roller is configured to engage with a tracking protrusion comprised in the support track.
15. 15. A bi-fold door system comprising: the compensator assembly according to any one of claims 1 to 14; the swing panel; and the supported panel.
16. 16. A method of use of the compensator assembly according to any one of claim 8 or claim 9, the method comprising: starting from the mis-aligned configuration, applying force to the swing panel or supported panel to urge the compensator member to move along the alignment track, and thereby cause the one or both rollers of the pair of rollers to roll on the inner surface of the guide channel.
17. 17. The method according to claim 16, wherein: urging the compensator member to move along the alignment track in the mis-aligned configuration causes the compensator member to move away from the mis-aligned configuration.
18. 18. A method of manufacturing a compensator assembly for a bi-fold door system, the method comprising: manufacturing a compensator member configured to pivotably connect to a swing panel and pivotably connect to a supported panel such that the swing and supported panels are pivotable in relation to each other and in relation to the compensator member, the compensator member comprising a contact portion, wherein manufacturing the compensator member comprises configuring the contact portion with a pair of rollers; and manufacturing an alignment track comprising a guide channel configured to receive the contact portion, wherein manufacturing the compensator member and the alignment track comprises: configuring the compensator assembly such that there is a non-zero clearance between the pair of rollers and the guide channel, such that the pair of rollers are out of physical contact with the guide channel, when, in use, the contact portion is in an aligned configuration with respect to the alignment track.
19. 19. The method of manufacture according to claim 18, comprising: configuring the compensator member with an adjustment mechanism for adjusting a longitudinal dimension of the compensator member such that, in use, the non-zero clearance between the pair of rollers and the guide channel in the aligned configuration is adjustable.
20. 20. The method of manufacturing according to claim 19, comprising: creating an internally threaded hole in a compensator member base for receiving an externally threaded portion of the contact portion.