AU2019101345A4 - Overhead sectional door top hanger - Google Patents

Overhead sectional door top hanger Download PDF

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Publication number
AU2019101345A4
AU2019101345A4 AU2019101345A AU2019101345A AU2019101345A4 AU 2019101345 A4 AU2019101345 A4 AU 2019101345A4 AU 2019101345 A AU2019101345 A AU 2019101345A AU 2019101345 A AU2019101345 A AU 2019101345A AU 2019101345 A4 AU2019101345 A4 AU 2019101345A4
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AU
Australia
Prior art keywords
panels
door
hanger
panel
wall
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Active
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AU2019101345A
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AU2019101345A9 (en
AU2019101345B4 (en
Inventor
Grant NICHOLLS
Bianto Santoso
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B&D Australia Pty Ltd
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B&D Australia Pty Ltd
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Priority to AU2019101345A priority Critical patent/AU2019101345B4/en
Publication of AU2019101345A4 publication Critical patent/AU2019101345A4/en
Publication of AU2019101345A9 publication Critical patent/AU2019101345A9/en
Application granted granted Critical
Publication of AU2019101345B4 publication Critical patent/AU2019101345B4/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/48—Wings connected at their edges, e.g. foldable wings
    • E06B3/485—Sectional doors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/14—Counterbalance devices with weights
    • E05D13/145—Counterbalance devices with weights specially adapted for overhead wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
    • E05D15/24—Suspension arrangements for wings for wings sliding vertically more or less in their own plane consisting of parts connected at their edges
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
    • E05D15/165—Details, e.g. sliding or rolling guides
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/108—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for hangars

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Extensible Doors And Revolving Doors (AREA)

Abstract

C:\Interwovn\NRPortbl\DCC\KMII\9383577 _.docx-5/ll/2019 Abstract Disclosed is an overhead sectional door having a plurality of panels each connected to at least one adjacent panel by a hinge. The panels are configured to move between an open position and a closed position along guides located at either end of the panels. Each panel has a hanger at each end for connecting the panel to the respective guide. One of the hangers on each side is a top hanger located at an uppermost edge of the door, which travels in a different channel of the guide to the rest of the hangers. The panels are arranged to be aligned when the door is in the closed position, adjacent panels pivot to a positive relative angle during transition towards the open position, and the panels are aligned when the door is in the open position. The result is that adjacent panels never have a negative relative angle at any point, allowing the use of closely fitting cladding on the external side of the door. [Fig. 6] N Al /m //~ l

Description

OVERHEAD SECTIONAL DOOR TOP HANGER
TECHNICAL FIELD [0001] The present invention generally relates to overhead sectional doors, and in particular to mounting and guiding systems for the tops of such doors.
BACKGROUND [0002] Overhead sectional doors commonly use a two channel guide system that allows different parts of the door to be guided along slightly different paths. The majority of the door can be guided along a primary channel, while the very top of the door can be guided along a separate channel.
[0003] The channels diverge at the top of the door opening, so that while the primary channel may curve away from the opening before reaching the top, the separate channel allows the top of the door to still be guided all the way in to the lintel. This brings the top of the door to a completely closed position, even though the majority of the door is moving away from the opening before reaching the top.
[0004] The advantage of this system is that the required radius of curvature in the guide can be maintained while limiting the height required internally above the door opening. That is, the door is suspended at the same height as the lintel when open, rather than requiring the door to be suspended at a distance above the top of the door opening. This can be critical in some situations, where additional height may not be available.
[0005] The disadvantage of this system is that the horizontal portion of the guide must remain as separate channels, resulting in misalignment of the door panels when the door is open. This may put strain on hinges, for example, or may prevent the use of close fitting external cladding or cause damage to such cladding from interference when the door is simply opened.
[0006] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as, an
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-2acknowledgement or admission or any form of suggestion that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
SUMMARY [0007] According to one example aspect of the invention, there is provided an overhead sectional door including a plurality of panels each connected to at least one adjacent panel by a hinge, the panels being configured to move between an open position and a closed position along guides located at either end of the panels, each panel including a hanger at each end for connecting the panel to the respective guide, with one of the hangers on each side being a top hanger located at an uppermost edge of the door, wherein the panels are aligned when the door is in the closed position, adjacent panels pivot to a positive relative angle during transition towards the open position, and the panels are aligned when the door is in the open position, so that adjacent panels never have a negative relative angle at any point.
[0008] In one form, each guide includes a first channel and a second channel, with the top hanger connecting to the first channel and the remaining hangers connecting to the second channel, and wherein each panel includes a frame and a cladding, the panels being configured so that edges of the cladding of adjacent panels move apart from one another when the panels pivot to the positive relative angle.
[0009] In another form, the top hanger includes a top wall and a bottom wall connected by an end wall at an outer end, and a flange extending from each of the top wall and the bottom wall at an inner end, wherein the flanges are substantially aligned and extend in the same direction, wherein a connecting axle is attached to two slots in the top wall so that a position of the connecting axle can be adjusted to be closer or further away from the cladding of the panel to which the top hanger is attached.
[0010] In yet another form, the top hanger extends over the frame such that the top wall and the bottom wall of the top hanger are on different sides of a section of the frame,
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-3 wherein the top wall is spaced apart from the frame to provide space for a fastener to attach the connecting axle.
[0011] According to another example aspect of the invention, there is provided a top hanger for an overhead sectional door, including a top wall and a bottom wall connected by an end wall at an outer end, and a flange extending from each of the top wall and the bottom wall at an inner end, wherein the flanges are substantially aligned and extend in the same direction.
[0012] The invention, in its various combinations, either in method or apparatus form, may also be characterised by the following listing of items:
[0013] 1. An overhead sectional door comprising a plurality of panels each connected to at least one adjacent panel by a hinge, the panels being configured to move between an open position and a closed position along guides located at either end of the panels, each panel comprising a hanger at each end for connecting the panel to the respective guide, with one of the hangers on each side being a top hanger located at an uppermost edge of the door, wherein the panels are aligned when the door is in the closed position, adjacent panels pivot to a positive relative angle during transition towards the open position, and the panels are aligned when the door is in the open position, so that adjacent panels never have a negative relative angle at any point.
[0014] 2. The overhead sectional door according to item 1, wherein each guide comprises a first channel and a second channel, wherein the top hanger connects to the first channel and the remaining hangers connect to the second channel.
[0015] 3. The overhead sectional door according to any one of the preceding items, wherein the top hanger comprises a bracket in a substantially U shape, each end of the U shape having a flange with one or more holes for connecting the flange close to the uppermost edge of the door, wherein each of the flanges extends from the body of the hanger in the same direction.
[0016] 4. The overhead sectional door according to any one of the preceding items, wherein the top hangers are adjustable.
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-4[0017] 5. The overhead sectional door according to any one of the preceding items, wherein each panel comprises a frame and a cladding, the panels being configured so that edges of the cladding of adjacent panels move apart from one another when the panels pivot to the positive relative angle.
[0018] 6. The overhead sectional door according to item 5, the top hanger comprising a top wall and a bottom wall connected by an end wall, wherein a connecting axle is attached to the top wall.
[0019] 7. The overhead sectional door according to item 6, wherein the connecting axle attaches to two slots in the top wall so that the position of the connecting axle can be adjusted.
[0020] 8. The overhead sectional door according to item 7, wherein the slots are arranged so that the axle can be adjusted to be closer or further away from the cladding on the panel to which the hanger is attached.
[0021] 9. The overhead sectional door according to any one of items 6 to 8, wherein the top hanger extends over the frame such that the top wall and the bottom wall of the top hanger are on different sides of a section of the frame.
[0022] 10. The overhead sectional door according to item 9, wherein the top wall is spaced apart from the frame to provide space for a fastener to attach the connecting axle.
[0023] 11. The overhead sectional door according to any one of the preceding items, wherein a bracket of the top hanger is formed from a flat sheet of material.
[0024] 12. The overhead sectional door according to any one of the preceding items, wherein the hangers each comprise a bracket, an axle, and a wheel, wherein the wheel couples with one of the guides and the bracket connects to one of the panels.
[0025] 13. A top hanger for an overhead sectional door, comprising a top wall and a bottom wall connected by an end wall at an outer end, and a flange extending from each of the top wall and the bottom wall at an inner end, wherein the flanges are substantially aligned and extend in the same direction.
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-5 [0026] 14. The top hanger according to item 13, wherein the top wall comprises two slots to which a connecting axle is adjustably attached.
[0027] 15. The top hanger according to any one of items 13 or 14, wherein the top hanger is cut, stamped, pressed and/or folded from a sheet of material.
[0028] It will be appreciated that the broad forms of the invention and their respective features can be used in conjunction and/or independently, and reference to separate broad forms is not intended to be limiting. Furthermore, it will be appreciated that features of the method can be performed using the system or apparatus and that features of the system or apparatus can be implemented using the method.
BRIEF DESCRIPTION OF FIGURES [0029] Example embodiments should become apparent from the following description, which is given by way of example only, of at least one preferred but non-limiting embodiment, described in connection with the accompanying figures, wherein:
[0030] Figure 1 (prior art) illustrates a perspective view of a top corner of an overhead sectional door and guide, including a prior art top hanger, where the door is in a closed configuration;
[0031] Figure 2 (prior art) illustrates a perspective view of the complete overhead sectional door from Figure 1, including the prior art top hanger, where the door is in an open configuration;
[0032] Figure 3 (prior art) illustrates an enlarged view of Detail A from Figure 2;
[0033] Figure 4 (prior art) illustrates an angled side view of the complete overhead sectional door from Figure 2 in the open configuration;
[0034] Figure 5 (prior art) illustrates an enlarged view of Detail B from Figure 4;
[0035] Figure 6 illustrates a perspective view of a complete overhead sectional door according to an embodiment of the invention, where the door is in an open configuration;
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-6[0036] Figure 7 illustrates an enlarged view of Detail C from Figure 6;
[0037] Figure 8 illustrates an angled side view of the complete overhead sectional door from Figure 6 in the open configuration;
[0038] Figure 9 illustrates an enlarged view of Detail D from Figure 8;
[0039] Figure 10 (prior art) illustrates an outer end perspective view of a prior art top hanger;
[0040] Figure 11 (prior art) illustrates an inner end perspective view of the prior art top hanger from Figure 10;
[0041] Figure 12 illustrates an outer end perspective view of a top hanger according to an embodiment of the invention; and [0042] Figure 13 illustrates an inner end perspective view of the top hanger from Figure 12.
DETAILED DESCRIPTION [0043] The following modes, given by way of example only, are described in order to provide a more precise understanding of the subject matter of a preferred embodiment or embodiments.
[0044] In the Figures, incorporated to illustrate features of an example embodiment, like reference numerals are used to identify like parts throughout the Figures.
[0045] An example of an overhead sectional door according to the invention will first be described with general reference to the Figures, including Figures 1 to 5, which illustrate prior art overhead sectional doors.
[0046] Referring to Figures 1 to 5, the prior art door 100 includes a number of panels 101, each connected to at least one adjacent panel by a hinge 102. The panels 101 are configured to move between an open position, as shown in Figure 2 to 5, and a closed
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-7position, as shown in Figure 1. This movement occurs along guides 105 located at either end of the panels 101.
[0047] Each panel has a hanger at each end for connecting the panel to the respective guide 105. In practice, the hangers are located in approximate alignment with the hinges 102, to allow the door 100 to move through curves in the guides 105. One of the hangers on each side is a top hanger 108 located at an uppermost edge of the door 100.
[0048] The panels 101 are substantially aligned when the door 100 is in the closed position, thereby completely or at least substantially covering an opening in a wall between the guides 105. During transition towards the open position, adjacent panels 101 pivot to a positive relative angle as they move along curves in the guides 105. When the door 100 is in the open position the panels 101 are somewhat aligned, however the top two panels 101 have a small negative relative angle.
[0049] This negative relative angle is caused by the top hanger 108 travelling in a different channel to the remaining hangers. That is, each guide 105 has a first channel 111 in which the top hanger 108 travels, and a second channel 112 in which the remaining hangers travel. The first channel 111 is located above the second channel 112, causing this negative angle when the door is in the open configuration.
[0050] The reason for the two channels is illustrated in Figure 1. As the door 100 is at approximately the same height as the top of the door opening when in the open configuration, the second channel 112 of the guide 105, along which most of the hangers travel, is separated from the top of the door opening due to the curvature in the second channel 112. Therefore, if this was the only channel used, the top of the door would never completely close.
[0051] In order to rectify this situation without requiring additional space above the height of the door opening, the separate channel 111 for the top hanger 108 is used. As shown in Figure 1, the first channel 111 does not have the same curve, allowing the top of the door 100 to completely close off the door opening when in the closed configuration.
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-8[0052] The door according to the invention aims to address one or more issues with the prior art door 100 described above. An overhead sectional door according to one embodiment of the invention includes a number of panels each connected to at least one adjacent panel by a hinge. The panels are configured to move between an open position and a closed position along guides located at either end of the panels.
[0053] Each panel has a hanger at each end for connecting the panel to the respective guide. In practice, the hangers are located in approximate alignment with the hinges, to allow the door to move through curves in the guides. One of the hangers on each side is a top hanger located at an uppermost edge of the door.
[0054] The panels are substantially aligned when the door is in the closed position, thereby completely or at least substantially covering an opening in a wall between the guides. During transition towards the open position, adjacent panels pivot to a positive relative angle as they move along curves in the guides. When the door is in the open position the panels are aligned, so that adjacent panels never have a negative relative angle at any point.
[0055] The invention is advantageous over prior art systems, such as the one described previously, where the panels can have a negative relative angle.
[0056] The negative angle seen in the prior art system is particularly problematic when closely fitting cladding is used. In such a situation, positive relative angles are not an issue because adjacent sheets of cladding move apart from one another. However, with a negative relative angle, the sheets move toward one another and may collide, causing damage to the edges of the adjacent sheets.
[0057] The cladding issue can be easily overcome by providing larger gaps between the adjacent cladding, however this may not provide the same visual appeal of more closely fitting sheets. Therefore, avoiding the negative relative angles is a particular advantage of the invention.
[0058] An example of a top hanger according to the invention for use with an overhead sectional door will now be described. The top hanger may be used with an overhead
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-9sectional door to realise the embodiment of the invention described previously. The top hanger has a top wall and a bottom wall connected by an end wall at an outer end. A flange extends from each of the top wall and the bottom wall at an inner end. These flanges are substantially aligned and extend in the same direction.
[0059] This particular embodiment of the top hanger has a number of advantages. Firstly, it allows significantly improved packaging over prior art hangers, which allows the door to which the top hanger is attached to have panels that never move into negative relative angles, similar to the embodiment of the door as described previously. Secondly, there are other advantageous aspects, such as providing improved adjustability of the top hanger and allowing better access for fasteners when the top hanger is installed on a door.
[0060] Various other example embodiments of an overhead sectional door will now be described with reference to Figures 6 to 9.
[0061] An example embodiment of an overhead sectional door 200 is shown that has a number of panels 201. Each of the panels 201 is connected to at least one adjacent panel 201 by a hinge 205. The panels 201 are again configured to move between an open position and a closed position along guides 205 located at either end of the panels 201.
[0062] Each panel 201 has a hanger at each end for connecting the panel 201 to the respective guide 205. One of the hangers on each side is a top hanger 208 located at an uppermost edge of the door.
[0063] The panels 201 are aligned when the door 200 is in the closed position, adjacent panels 201 pivot to a positive relative angle during transition towards the open position, and the panels 201 are aligned when the door 200 is in the open position. That is, adjacent panels 201 never have a negative relative angle at any point. This includes the top two panels, which are aligned even when the door is open, as shown in particular in Figure 6 for example.
[0064] In some embodiments of the door 200, each guide 205 may have a first channel 211 and a second channel 212. In this configuration, the top hanger 208 connects to the first channel 211 and the remaining hangers connect to the second channel 212. The top
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-10hangers 208 are adjustable to ensure that despite the use of different channels 211,212, the door 200 can be arranged so that the panels 201 are never at a negative relative angle.
[0065] Each panel 201 includes a frame 215 and a cladding 216, where the cladding 216 is on the outside of the frame, or otherwise stated, towards the external of the building to which the door 200 is fitted. In this way, the panels 201 are configured so that edges of the cladding 216 of adjacent panels 201 move apart from one another when the panels 201 pivot to the positive relative angle during transition between the open and closed configurations.
[0066] It can be seen in the Figures that the present embodiment of the door 200 has the cladding 216 mounted so that it abuts the cladding 216 of an adjacent panel, or at least sits very close, when the panels 201 of the door 200 are aligned. As the panels 201 never move to a negative relative angle, this makes such an arrangement possible. Prior art doors would not have permitted such a close fit, as negative relative angles either would not be possible or would result in damage to the cladding.
[0067] Referring to Figure 7, the top hanger 208 includes a bracket 220 to which an axle holder 221 is attached using fasteners 222. A connecting axle 223 is fitted in the axle holder 221 and has a wheel 224 that sits in the first channel 211, completing the connection between the door 200 and the guide 205. The axle holder 221 is connected to the bracket 220 in a manner that allows the connecting axle 223 to be adjusted towards or away from the cladding 216.
[0068] The top hanger 208 extends over part of the frame 215 so arms of the bracket 200 are on different sides of this section of the frame 215. The part of the bracket 220 where the axle holder 221 is attached is spaced apart from the frame 215. This provides space for the fasteners 222 to attach the axle holder 221 and also provides access to the fasteners 222 the event that this is necessary for assembly and/or adjustment.
[0069] Referring now to Figures 12 and 13, the bracket 220 of the top hanger 208 is shown in more detail. This bracket 220 has a body 228 with a substantially U shape, with each end of the U shape having a flange 229 with one or more holes 230. These holes 230
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- 11 are used for connecting the flange 229 close to the uppermost edge of the door 200, as was shown in Figures 6 to 9. Importantly, each of the flanges 229 extends from the body 228 of the bracket 220 in the same direction. This is in contrast to the brackets 120 of the prior art door 100, where the flanges extended in opposite directions, as shown in Figures 10 and
11.
[0070] Described another way, the top hanger 208 has a top wall 232 and a bottom wall 233 connected by an end wall 234 at an outer end. The flanges 229 extend from each of the top wall 232 and the bottom wall 233 at an inner end. The flanges 229 are substantially aligned and extend from the respective walls 232, 233 in the same direction as one another.
[0071] The top wall 232 of the bracket 220 has two slots 235 to which the fasteners 222 for the axle holder 221 is attached. The position of the axle holder 221, and therefore the connecting axle 223, can be adjusted by loosening and moving the fasteners 222 along the slots 235.
[0072] When the bracket 220 is attached to a panel 201 of the door 200, it will be appreciated that the top wall 232 and the bottom wall 233 are on different sides of a section of the frame 215. As the flanges 229 extend in the same direction, this ensures there is a gap between the top wall 232 and the frame 215. In turn, this design allows the top wall 232 to be closer to the top edge of the door 200, providing the necessary flexibility in positioning of the connecting axle 223.
[0073] Preferably, the bracket 220 of the top hanger 208 is formed from a flat sheet of material. For example, the bracket 220 might be cut, stamped, pressed and/or folded from a sheet of material.
[0074] In the foregoing description of preferred embodiments, specific terminology has been resorted to for the sake of clarity. However, the invention is not intended to be limited to the specific terms so selected, and it is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar technical purpose. Terms such as “front” and “rear”, “inner” and “outer”, “above” and
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- 12“below” and the like are used as words of convenience to provide reference points and are not to be construed as limiting terms.
[0075] Whilst the present invention has been described with reference to particular embodiments, it will be understood that many modifications will be apparent to those skilled in the art. All such variations and modifications should be considered to fall within the scope of the invention as broadly described and as claimed below.
[0076] Throughout this specification and the claims which follow, unless the context requires otherwise, the word “comprise”, and variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

Claims (5)

  1. The claims defining the invention are as follows:
    1. An overhead sectional door comprising a plurality of panels each connected to at least one adjacent panel by a hinge, the panels being configured to move between an open position and a closed position along guides located at either end of the panels, each panel comprising a hanger at each end for connecting the panel to the respective guide, with one of the hangers on each side being a top hanger located at an uppermost edge of the door, wherein the panels are aligned when the door is in the closed position, adjacent panels pivot to a positive relative angle during transition towards the open position, and the panels are aligned when the door is in the open position, so that adjacent panels never have a negative relative angle at any point.
  2. 2. The overhead sectional door according to claim 1, wherein each guide comprises a first channel and a second channel, with the top hanger connecting to the first channel and the remaining hangers connecting to the second channel, and wherein each panel comprises a frame and a cladding, the panels being configured so that edges of the cladding of adjacent panels move apart from one another when the panels pivot to the positive relative angle.
  3. 3. The overhead sectional door according to claim 2, the top hanger comprising a top wall and a bottom wall connected by an end wall at an outer end, and a flange extending from each of the top wall and the bottom wall at an inner end, wherein the flanges are substantially aligned and extend in the same direction, wherein a connecting axle is attached to two slots in the top wall so that a position of the connecting axle can be adjusted to be closer or further away from the cladding of the panel to which the top hanger is attached.
  4. 4. The overhead sectional door according to claim 3, wherein the top hanger extends over the frame such that the top wall and the bottom wall of the top hanger are on different sides of a section of the frame, wherein the top wall is spaced apart from the frame to provide space for a fastener to attach the connecting axle.
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  5. 5. A top hanger for an overhead sectional door, comprising a top wall and a bottom wall connected by an end wall at an outer end, and a flange extending from each of the top wall and the bottom wall at an inner end, wherein the flanges are substantially aligned and extend in the same direction.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2034790B (en) * 1978-11-22 1983-01-19 Bax Doors Pty Ltd Bipanel overhead garage door
DE29605430U1 (en) * 1996-03-23 1996-05-30 Siebau Garage door unit
ITBS20050093A1 (en) * 2005-07-27 2007-01-28 Sepi Societa Europ Porte Indust GUIDE SYSTEM FOR SECTIONAL DOORS
AU2019200973A1 (en) * 2018-03-13 2019-10-03 Steel-Line Garage Doors Australia Pty Ltd A System

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