MODULAR LADDER WITH A TAMBOUR BARRIER

Abstract

A user-adjustable, blow-molded ladder or a blow-molded staircase system for ingress and egress of an above-ground swimming pool is provided. In one embodiment, the ladder includes a first side rail structure and a second side rail structure oriented opposite and substantially parallel to the first side rail structure, a platform and a plurality of steps coupling the first side rail to the second side rail, and a flexible tambour barrier configured, in a first position, to inhibit access to the steps from the anterior direction and configured, in a second position, to allow access to the steps from an anterior direction and inhibit pass through entry between the steps.

Claims

1. A ladder for entering or exiting an above-ground swimming pool, the ladder comprising: a plurality of steps, each step comprising a first end and a second end opposite the first end; a first side rail structure having a first lower end configured to rest on a lower support surface, a first upper end, an anterior edge, a posterior edge, first apertures formed in the first side rail structure, and a first groove, wherein the first apertures are configured to receive respective first ends of each of the plurality of steps to be supported by the first side rail structure; a second side rail structure positioned parallel to the first side rail structure having a second lower end configured to rest on the lower support surface, a second upper end, an anterior edge, a posterior edge, and second apertures formed in the second side rail structure, and a second groove, wherein the second apertures are configured to receive respective second ends of each of the plurality of steps to be supported by the second side rail structure; a platform positioned perpendicular to the first side rail structure and second side rail structure including a first opening configured to receive the first upper end of the first side rail structure and a second opening configured to receive the second upper end of the second side rail structure; and a flexible barrier device having a first side and a second side, wherein the first side of the flexible barrier device is positioned in the first groove of the first side rail structure and the second side of the flexible barrier device is positioned in the second groove of the second side rail structure, wherein, in a first position, the flexible barrier device extends the length of the ladder between the recesses and the anterior edge, inhibiting access to the steps from the anterior direction, wherein, in a second position, the flexible barrier device extends the length of the ladder between the recesses and the posterior edge, allowing access to the steps from an anterior direction and inhibiting pass through entry between the steps, and wherein the flexible barrier device moves along the first groove and the second groove between the first position and the second position.

2. The ladder of claim 1, wherein the first apertures are distributed at even intervals beginning proximate to the first lower end and extending towards the first upper end, wherein the first groove begins at the first lower end between a lowermost aperture and the anterior edge of the first side rail structure extending substantially parallel to the anterior edge towards the first upper end, traverses the first side rail structure towards the posterior edge of the first side rail structure between an uppermost aperture and the first upper end, and proceeds toward the first lower end of the first side rail structure, terminating between the lower most aperture and the posterior edge, wherein the second apertures are distributed at even intervals beginning proximate to the second lower end and extending towards the second upper end, and wherein the second groove begins at the second lower end between a lowermost aperture and the anterior edge of the second side rail structure extending substantially parallel to the anterior edge towards the second upper end, traverses the second side rail structure towards the posterior edge of the second side rail structure between an uppermost aperture and the second upper end, and proceeds toward the second lower end of the second side rail structure, terminating between the lower most aperture and the posterior edge.

3. The ladder of claim 1, further comprising: a first handrail positioned above and substantially parallel to the first side rail structure and configured to interlock with the first side rail structure and an inner surface of the first aperture of the platform thereby coupling the first handrail and the first side rail structure to the platform; and a second handrail positioned above and substantially parallel to the second side rail structure and configured to interlock with the second side rail structure and an inner surface of the second aperture of the platform thereby coupling the second handrail and the second side rail structure to the platform.

4. The ladder of claim 3, wherein the ladder of claim 3 is a first ladder, and further comprising a second ladder attachable to said first ladder, said first and second handrails of said first ladder attachable to said first and second hand rails of said second ladder to form an A-Frame ladder system where said first ladder may be positioned outside said pool and said second ladder may be positioned inside the pool with the platform of said first ladder is flush with the platform of said second ladder together forming a combined platform which traverses a top perimeter of the pool.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0010] The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become apparent and be better understood by reference to the following description of the invention in conjunction with accompanying drawing, wherein:

[0011] FIG. 1 is a perspective view of a modular ladder with a tambour barrier in a first position according to an embodiment of the present disclosure;

[0012] FIG. 2 is a perspective view of a modular ladder with a tambour barrier in a second position according to an embodiment of the present disclosure;

[0013] FIGS. 3A and 3B are perspective sectional views of a modular ladder with a tambour barrier in a first position and a second position, respectively, according to embodiments of the present disclosure;

[0014] FIG. 4 is a perspective view of a step and its male interconnections according to an embodiment of the present disclosure;

[0015] FIG. 5 is a view of apertures of a rail structure configured to receive the male interconnections of a step according to an embodiment of the present disclosure;

[0016] FIG. 6 is a view of apertures of a rail structure and corresponding locking tab according to an embodiment of the present disclosure;

[0017] FIG. 7 is a perspective view of a modular ladder mounted on an extension boot assembly according to an embodiment of the present disclosure;

[0018] FIG. 8A is a perspective view of an extension boot assembly according to an embodiment of the present disclosure;

[0019] FIG. 8B is an exploded perspective view of an extension boot assembly according to an embodiment of the present disclosure;

[0020] FIG. 8C is a perspective view of the extension step seen in FIG. 8B;

[0021] FIG. 8D is an enlarged, fragmented, perspective view of the side extension seen in FIG. 8B;

[0022] FIG. 9 illustrates a coupling configuration of a rail structure of a modular ladder and an extension boot of an extension boot assembly according to an embodiment of the present disclosure;

[0023] FIGS. 10A and 10B is a perspective sectional view of a modular ladder mounted on an extension boot assembly with a tambour barrier in a first position and a second position according to embodiments of the present disclosure;

[0024] FIGS. 11A and 11B illustrate a locking mechanism configured to secure a tambour barrier in a first position according to embodiments of the present disclosure;

[0025] FIGS. 12A and 12B illustrate detailed views of an upper end of a side rail structure according to embodiments of the present disclosure;

[0026] FIGS. 13A and 13B illustrate detailed views of a platform with openings configured to receive an upper end of a side rail structure according to embodiments of the present disclosure;

[0027] FIG. 14 illustrates a detailed view of a platform opening coupled to an upper end of a side rail structure according to an embodiment of the present disclosure;

[0028] FIGS. 15A and 15B illustrate detailed views of a handrail configured to interlock with an upper end of a side rail structure within an opening of a platform according to embodiments of the present disclosure;

[0029] FIGS. 16A-16C illustrate a coupling configuration of a handrail of a modular ladder and a mounting bracket assembly according to embodiments of the present disclosure; and

[0030] FIG. 17 illustrates modular ladders coupled together to form an A-Frame ladder according to an embodiment of the present disclosure.

[0031] Corresponding reference characters indicate corresponding parts throughout the several views. The embodiments set out herein are examples only and illustrate currently preferred embodiments of the present disclosure, and such examples are not to be construed as limiting the scope of the invention in any manner.

DETAILED DESCRIPTION

[0032] FIG. 1 is a perspective view of a modular ladder with a tambour barrier in a first position according to an embodiment of the present disclosure. Referring to FIG. 1, a user-adjustable, blow-molded ladder 100 for ingress or egress of an above-ground swimming pool is illustrated. Of course, it will be readily appreciated that the inventive ladder structure herein illustrated and described is not limited to this particular end use, and possesses general utility in other applications apart from this specific swimming pool environment.

[0033] The ladder 100 includes a plurality of molded plastic parts, certain of which are identical and assembled in mirror-image relationship to provide the completed user-adjustable, blow-molded ladder 100 (FIGS. 1 and 2). At this point it will be noted that identical parts described hereafter will be designated by the same numbers, as will be apparent from the drawings. As noted above, all parts, including the tambour device, may be fabricated of molded high-density polyethylene, polypropylene and/or conventional polymers.

[0034] The ladder 100 includes a first side rail structure 110a opposing a second side rail structure 110b, a platform 120 coupled to an upper end of both the first and second side rail structures 110a, 110b, a flexible tambour barrier 130 configured to inhibit access to a plurality of steps 160 from an anterior direction when in a first position and configured to inhibit pass through entry between the steps when in a second position, and a first and second handrails 140a, 140b positioned atop and coupled to the platform 120.

[0035] The first and second side rail structures 110a, 110b may include a lower end configured to rest on a lower support surface (e.g., the bottom surface of an above-ground swimming pool or the ground around an outer wall of an above-ground swimming pool), a first upper end configured to support the platform 120 of the ladder 100, an anterior edge at which a user may ascend or descend the ladder 100, and a posterior edge which may be placed proximate to a wall of an above ground pool or other apparatus with which the ladder may be utilized. The first and second side rail structures 110a, 110b may each include apertures 112 formed therein and configured to receive respective ends of each of the plurality of steps to be supported by the first and second side rail structures 110a, 110b, and a groove 113 beginning at the lower end between a lowermost aperture 112 and the anterior edge of the side rail structure 110a, 110b, extending substantially parallel to the anterior edge towards the upper end of the side rail structure 110a, 110b, traversing the side rail structure 110a, 110b towards the posterior edge of the side rail structure between an uppermost aperture 112 and the upper end, and proceeding toward the lower end of the side rail structure 110a, 110b, terminating between the lower most aperture 112 and the posterior edge. The groove 113 has a width and depth that allows the flexible tambour barrier 130 to move freely up and down.

[0036] In some embodiments, the apertures 112 may be distributed at even intervals beginning proximate to the first lower end and extending towards the first upper end. For example, the apertures 112 may have a vertical separation of 6-14 inches and positioned such that the lowest step 160, when installed, rests on a bottom support surface. In some embodiments, the apertures 112 may include pairs of apertures 112 sitting side-by-side with a space between the inner edges of each pair of apertures 112. Additionally, the apertures 112 may be horizontally displaced as they extend towards the first upper end in a stepwise fashion.

[0037] In certain embodiments, the first and second side rail structures 110a, 110b may further include an integral railing 114 to aid a user in balancing while ascending or descending the ladder 100. In some embodiments, the two largest surfaces of the first and second side rail structures 110a, 110b may be substantially identical. That is, any rails, grooves, apertures, holes, protrusions, tabs, and the like found on a first of the largest surfaces of the side rail structures 110a, 110b may be mirrored on an opposing surface of the side rail structures 110a, 110b, thereby making the first side rail structure 110a interchangeable with the second side rail structure 110b. The interchangeability of the first side rail structure 110a with the second side rail structure 110b may simplify manufacturing and distribution of the ladder 100.

[0038] The platform 120 is coupled to an upper end of both the first and second side rail structures 110a, 110b. The platform 120 may be further coupled to the first and second handrails 140a, 140b. In some embodiments, the first and second handrails 140a, 140b, the upper ends of the first and second side rail structures 110a, 110b, and the platform 120 may interlock together providing rigidity to an upper portion of the ladder.

[0039] The flexible tambour barrier 130 includes a first side, a second side, a manipulation means 132 (e.g., a handle, a recess, an aperture, or the like) and is configured such that the first side of the flexible tambour barrier 130 is seated in the groove 113 of the first side rail structure 110a and the second side of the flexible tambour barrier 130 is seated in the groove 113 of the second side rail structure 110b. The groove 113 has a width and a depth that allows the flexible tambour barrier 130 to move freely up and down. As a result, the flexible tambour barrier 130 may be moved from a first position, which inhibits access to the plurality of steps 160 from an anterior direction to a second position, which reveals the steps for use and inhibits pass through between the plurality of steps 160. In certain embodiments, the ladder 100 may include one or more locking mechanisms to secure the tambour in a first position when outside the pool and prevent access to the plurality of steps 160 from an anterior direction. Locking the tambour in the first position and preventing access to the plurality of steps 160 may be beneficial in limiting unauthorized use of an associated above-ground pool.

[0040] In some embodiments, the first and second handrails 140a, 140b may be coupled to a first and second mounting assembly 150a, 150b. The first and second mounting assembly 150a, 150b may be used to secure ladder 100 to a pool deck or platform, this being an option rather than attaching to a second ladder system to form an A-Frame ladder system as discussed above. The first and second mounting assembly 150a, 150b may be height adjustable to accommodate a variety of deck or platform heights. Further, the first and second mounting assembly 150a, 150b may include a base or feet to securely affix first and second mounting assembly 150a, 150b to the deck or platform and provide additional stability to the ladder 100.

[0041] FIG. 2 is a perspective view of a modular ladder with a tambour barrier in a second position according to an embodiment of the present disclosure. Referring to FIG. 2, the flexible tambour barrier 130 may be moved along the groove 113 from a first position, which is substantially parallel to the anterior edges of the first and second side rail structures 110a, 110b, to a second position, which is between the plurality of steps 160 and the posterior edges of the first and second side rail structures 110a, 110b. Moving the flexible tambour barrier 130 from the first position to the second position provides access to the plurality of steps from the anterior direction and inhibits pass through entry between the plurality of steps 160.

[0042] FIGS. 3A and 3B are perspective sectional views of a modular ladder with a tambour barrier in a first position and a second position according to embodiments of the present disclosure. Referring to FIGS. 3A and 3B, the flexible tambour barrier 130 may be moved along the groove 113 from a first position, which inhibits access to the plurality of steps 160 from an anterior direction, to a second position, which inhibits pass through entry between the plurality of steps 160. In certain embodiments, the first and second side rail structures 110a, 110b may further include a second groove 313. The second groove 313 may be an additional groove, slightly greater in length than a length of the flexible tambour barrier 130, and positioned substantially parallel to a portion of the first groove which is utilized when the flexible tambour barrier 130 is in the second position.

[0043] In some configurations, the ladder 100 may regularly occupy an interior portion of an above-ground pool. For example, a ladder 100 may be mounted to a deck or platform or may be mounted to a second ladder 100 to form an A-frame ladder and continually extend into the pool. In such instances, an unsafe situation may arise by allowing the flexible tambour barrier 130 to be moved into the first position, thereby preventing access to the plurality of stairs while in the water. In such instances, the flexible tambour barrier 130 may be installed in the groove 113, thereby fixing the flexible tambour barrier 130 in the second position. Installing the flexible tambour barrier 130 in the groove in the second position0 113 inhibits pass through entry between the plurality of steps 160 and provides continual access to the plurality of steps 160 from the pool.

[0044] FIG. 4 is a perspective view of a step and its male interconnections according to an embodiment of the present disclosure. Referring to FIG. 4, a step 160 of the plurality of steps may include a first end and a second end and is configured to couple with corresponding apertures 112 of the first and second side rail structures 110a, 110b. In some embodiments, the first end of each of the plurality of steps 160 may include one or more male interconnections 400.

[0045] Protruding from the first end and the second end of the step 160 is a male interconnection 400. The male interconnection 400 can have numerous and various configurations. A fundamental feature of each male interconnection 400 is that it has an insertion section 404 and a locking section 406. Generically, the insertion section 404 is essentially perpendicular in relation to the first and second end of the steps 160. The insertion section 404 is defined by at least one adjacent recess 402, and the locking section 406 is angled, preferably perpendicular, to the insertion section 404. Exemplary configurations of the male interconnection 400 include and are not limited to the T shape, the J shape, an L shape, a serpentine shape, a zig-zag shape, and variations thereof. The insertion section 404 is a narrow section with a predetermined height, a predetermined width, and a predetermined length. The predetermined height, length and width correspond with the apertures 112 of the first and second side rail structures 110a, 110b.

[0046] In some embodiments, the first end and the second end of the step 160 may each include two male interconnections 400. The two male interconnections 400 may be separated from and symmetric about a longitudinal axis of the step 160. In some embodiments, the first and second end of the steps 160 may include a locking ridge 410 positioned between the two male interconnections 400. For example, the locking ridges 410 found at each end of the step 160 may be centered on the longitudinal axis of the step 160. In other instances, the locking ridge 410 found at each end of the step 160 may be positioned slightly above or slightly below the longitudinal axis of the step 160.

[0047] FIG. 5 is a view of apertures of a rail structure configured to receive the male interconnections of a step according to an embodiment of the present disclosure. Referring to FIG. 5, the second rail structure 110b may include pairs of apertures 112 configured to receive the two male interconnections 400 found at each end of each step 160. Inner longitudinal surfaces of the apertures 112 may include one or more protrusions 502 positioned to nest within the one or more recesses 402 of the male interconnections 400. In some embodiments, the second rail structure 110b may further include recesses 510 positioned between the pair apertures 112 that are configured to receive the locking ridge 410 found between the male interconnections 400.

[0048] FIG. 6 is a view of apertures of a rail structure and a corresponding locking tab according to an embodiment of the present disclosure. Referring to FIG. 6, in some embodiments of the disclosure, one or more recesses 510 of the first side rail structure 110a or the second side rail structure 110b may include a ramped locking tab 610 positioned to engage with locking ridge 410. After the male interconnections 400 are inserted into the apertures 112 and the locking sections 406 of the male interconnections 400 extend laterally beyond the one or more protrusions 502 of the apertures 112, the recesses 510 receive the locking ridges 410. Male interconnections 400 are subsequently moved towards the one or more protrusions 502 so that the one or more protrusions 502 nest within the one or more recesses 402. As the male interconnections 400 are moved alongside the one or more protrusions 502, the locking ridges 410 of the step 160 engage the ramped locking tabs 610. When fully seated within the apertures 112, an edge of the locking ridges 410 rigidly engage a terminal lip of the ramped locking tabs 610 within the recesses 510 of the first and second side rail structures 110a, 110b.

[0049] FIG. 7 is a perspective view of a modular ladder mounted on an extension boot assembly according to an embodiment of the present disclosure. Referring to FIG. 7, in some instances it may be beneficial to elevate the ladder 100. For example, a height between the platform 120 and the ground may be insufficient to mount the ladder 100 to a deck or platform or extend the platform 120 over a side wall of a pool. Accordingly, certain embodiments of the present disclosure provide an extension boot assembly configured to couple to the first and second side rail structures 110a, 110b to elevate the ladder 100 12 inches or more. For example, an extension boot assembly may raise the platform 120 from 48 inches above the ground to 60 inches above the ground.

[0050] The extension boot assembly includes a first side extension 710a, a second side extension 710b, a barrier extension 730, and a bottom extension step 760. When installed, the barrier extension 730, which may be separate (see FIG. 10A) but is preferably integrally formed (see FIG. 10B) with the flexible tambour barrier 130, may be placed in a posterior position and fixed in the second position. Additionally, the groove 113 terminates at the lower ends of the first and second side rail structures 110a, 110b. Accordingly, the flexible tambour barrier 130 extends to a lowest most step 160 of the ladder 130 and barrier extension 730 extends to the bottom extension step 760. In the integral embodiment, a user may cut off the barrier extension if it is not needed (e.g. when installed on the outside pool ladder).

[0051] FIG. 8A is a perspective view of an extension boot assembly according to an embodiment of the present disclosure. Referring to FIG. 8A, the first and second side extensions 710a, 710b further include attachment holes 800 that may be aligned and coupled with corresponding holes in the first and second side rail structures 110a, 110b.

[0052] FIG. 8B is an exploded perspective view of an extension boot assembly according to an embodiment of the present disclosure. Referring to FIGS. 8A-D, extension step 760 includes an extension barrier groove 810 in which the free edge of extension barrier 730 is seated and secured (e.g., with screws) and one or more male interconnections 400 included at both a first end and a second end of extension step 760. It is noted the dimensions of bottom step 760 may be different in shape and size than steps 160 as needed for alignment and fitting purposes with the extension boot assembly and barrier groove. Additionally, the first and second side extensions 710a, 710b may further include one or more apertures 712 having one or more protrusions 502. In certain embodiments, apertures 712 may be configured to have the one or more male interconnections 400 inserted at a lower end of the first and second side extensions 710a, 710b. In these embodiments, the first and second side extensions 710a, 710b may also include ramped locking tabs 610 oriented to engage locking ridges 410 (FIG. 8C) when the one or more male interconnections 400 are moved alongside the one or more protrusions 502, such that an edge of the locking ridges 410 rigidly engage a terminal lip of the ramped locking tabs 610. It is noted and seen in FIG. 8C that male interconnections 4oo may include one or more indentations 400a and 400b to allow for adjustability when mounting step 760 to the first and second side extensions 710a, 710b.

[0053] FIG. 9 illustrates a coupling configuration of a rail structure of a modular ladder and an extension boot of an extension boot assembly according to an embodiment of the present disclosure. Referring to FIG. 9, in some embodiments the first and second side extensions 710a, 710b may further include one or more alignment protrusions 900 positioned such that the alignment protrusions 900 may be seated in a portion of groove 113. When alignment protrusions 900 are seated in groove 113, alignment of the attachment holes 800 of the first and second side rail structures 110a, 110b and the attachment holes 800 of the first and second side extensions 710a, 710b for coupling may be simplified. Coupling the attachment holes 800 of the first and second side rail structures 110a, 110b with the attachment holes 800 of the first and second side extensions 710a, 710b may be done with any suitable fasteners. For example, the attachment holes 800 of the first and second side rail structures 110a, 110b may be coupled with the attachment holes 800 of the first and second side extensions 710a, 710b using 2 inch bolts and corresponding nuts of appropriate thickness.

[0054] FIGS. 10A and 10B are perspective sectional views of a modular ladder mounted on an extension boot assembly with a tambour barrier in a first position and a second position according to embodiments of the present disclosure, respectively. Referring to FIG. 10A, in the first position, the manipulation means 132 (e.g., a handle, a recess, an aperture, or the like) of the flexible tambour barrier 130 may sit on or near an upper surface of a lower most step 160 of the ladder 100. In the second position seen in FIG. 10B, the flexible tambour barrier 130 may include integral barrier extension 730 which locates within groove 810 of extension step 760 barrier extension 730. When inside the pool, the tambour barrier 130 and integral barrier extension 730 are fixed in the second position so that the steps 160 are always available to egress the pool.

[0055] FIGS. 11A and 11B illustrate a locking mechanism configured to secure a tambour barrier in a first position according to embodiments of the present disclosure. Referring to FIGS. 11A and 11B, in certain embodiments the flexible tambour barrier 130 may be secured in the first position. For example, a locking device 1100 may be secured to the first side rail structure 110a or the second side rail structure 110b across the groove 113 just beyond the flexible tambour barrier 130, when in the first position, such that the locking device impedes the movement of the flexible tambour barrier 130 along the groove 113. In some embodiments, the first and second side rail structures 110a, 110b may have recesses 1110 and one or more holes 1120 through which a locking device 1100 may be secured. By securing the flexible tambour barrier 130 in the first position with locking device 1100, unauthorized access use of an associated above-ground pool may be limited.

[0056] As discussed above, the platform 120 is coupled to an upper end of both the first and second side rail structures 110a, 110b. The platform 120 may be further coupled to the first and second handrails 140a, 140b. In some embodiments, the first and second handrails 140a, 140b, the upper ends of the first and second side rail structures 110a, 110b, and the platform 120 may interlock together providing rigidity to an upper portion of the ladder.

[0057] FIGS. 12A and 12B illustrate detailed views of an upper end of a side rail structure according to embodiments of the present disclosure. Referring to FIGS. 12A and 12B, the upper end of the first and second side rail structures 110a, 110b may include an upper surface 1200, a recess forming receiver 1210 and a channel 1220, and ledge 1230 along a first surface of the first and second side rail structures 110a, 110b, as illustrated in FIG. 12A, and a channel 1240 along a second surface of the first and second side rail structures 110a, 110b, as illustrated in FIG. 12B.

[0058] FIGS. 13A and 13B illustrate detailed views of a platform with openings configured to receive an upper end of a side rail structure according to embodiments of the present disclosure. Referring to FIGS. 13A and 13B, the platform 120 includes a first pair of openings 1300a, 1300b configured to receive an upper end of the first and second side rail structures 110a, 110b and a second pair of opening 1310a, 1310b. The first pair of openings 1300a, 1300b each include a ramped locking tab 1302 and a protrusion 1340. The protrusion 1340 is configured to engage the channel 1240 of the upper end of a corresponding side rail structure 110a, 110b.

[0059] The second pair of openings 1310a, 1310b may include one or more protrusions 1304. In some embodiments, the ramped locking tab 1302 and the one or more protrusions 1304 are configured to couple to the first and second handrails 140a, 140b as described below.

[0060] FIG. 14 illustrates a detailed view of a platform opening coupled to an upper end of a side rail structure according to an embodiment of the present disclosure. Referring to FIG. 14, the platform 120 includes the opening 1300b where the protrusion 1340 on an inner surface of the opening 1300a is seated in channel 1240 of the upper end of the first side rail structure 110a. Accordingly, the upper surface 1200 of the upper end of the first side rail structure 110a is substantially level with an upper surface of the platform 120, and ledge 1230 is substantially level with a lower surface of the platform 120.

[0061] FIGS. 15A and 15B illustrate detailed views of a handrail configured to interlock with an upper end of a side rail structure within an opening of a platform according to embodiments of the present disclosure. Referring to FIGS. 15A and 15B, the first and second handrails 140a, 140b each include a posterior locking lug 1500, at least one anterior locking lug 1505, and a coupling flange 1510 extending along a length of a posterior member of the respective handrails 140a, 140b. The coupling flange 1510 includes a plurality of coupling holes 1520 which may be used to couple the ladder 100 to a mounting bracket assembly, a corresponding coupling flange 1510 of a second ladder 100, or any other ladder of suitable style and structure.

[0062] The posterior locking lug 1500 may be an integral extension of the posterior member of the handrail along which the coupling flange extends. Posterior locking lug 1500 may include one or more channels 1504 configured to couple with the one or more protrusions 1304 of the corresponding opening of the second pair of openings (e.g., the opening 1310a) of the platform 120. That is, the one or more protrusions 1304 of the opening 1310a may be seated in the corresponding one or more channels 1504 of the posterior locking lug 1500.

[0063] The anterior locking lugs 1505 may include a one or more locking protrusions 1512 on a first surface of the anterior locking lugs 1505 configured to engage with the locking channel 1220 of the upper end of a corresponding side rail structure 110a, 110b. Anterior locking lugs 1505 may further include a recess 1502 configured to engage with the ramped locking tab 1302 of the platform 120. Additionally, the anterior locking lugs 1505 are configured to align with receivers 1210 of the upper end of the corresponding first or second side rail structure 110a, 110b, such that when the anterior locking lugs 1505 are fully seated in the corresponding opening 1300a, 1300b within the receivers 1210 and moved in an anterior direction, a bottom surface of the anterior locking lugs 1505 rests on the ledge 1230, and the one or more locking protrusions 1512 are seated within the locking channel 1220 of the upper end of the corresponding first or second side rail structure 110a, 110b, thereby providing a bilateral, interlocked rigidity to an upper portion of the ladder 100.

[0064] FIGS. 16A-16C illustrate a coupling configuration of a handrail of a modular ladder and a mounting bracket assembly according to embodiments of the present disclosure. Referring to FIGS. 16A and 16B, the first and second handrails 140a, 140b may be coupled, via a coupling flange 1510, to a coupling flange 1610 of the first and second mounting assemblies 150a, 150b. The first and second mounting assemblies 150a, 150b may each include a telescoping arm 152 positioned within a hollow portion of a posterior member of the respective mounting assembly, a mounting foot 154 pivotally affixed to a distal end of the telescoping arm 152, and a coupling flange 1610 extending along a length of an anterior member of the respective mounting assembly. The first and second mounting assemblies 150a, 150b may be height adjustable by way of the telescoping arms 152 to accommodate a variety of deck or platform heights. Further, the coupling flange 1610 of the first and second mounting assemblies 150a, 150b may include a plurality of attachment holes 1620 corresponding to a plurality of attachment holes 1520 of the coupling flange 1510 of the first and second handrails 140a, 140b.

[0065] As illustrated in FIG. 16C, coupling flange 1610 of the first and second mounting assemblies 150a, 150b may be positioned immediately adjacent to coupling flange 1510 of the first and second handrails 140a, 140b. Coupling the attachment holes 1620 of the coupling flange 1610 with the attachment holes 1520 of the coupling flange 1510 may be done with any suitable fasteners 1650. For example, the attachment holes 1620 of the coupling flange 1610 may be coupled with the attachment holes 1520 of the coupling flange 1510 using inch bolts and corresponding nuts and washers of appropriate thickness.

[0066] FIG. 17 illustrates two modular ladders 100a and 100b coupled together to form an A-Frame ladder according to an embodiment of the present disclosure. Referring to FIG. 17, the coupling flange 1510 of the first and second handrails 140a, 140b may be used to secure two instances of ladder 100a, 100b to form an A-frame ladder. In other embodiments, the coupling flange 1510 may be used to secure the ladder 100 to another ladder of suitable style and structure. The attachment holes 1520 of the coupling flange 1510 of ladder 100a may be coupled with the attachment holes 1520 of the coupling flange 1510 of ladder 100b using -inch bolts and corresponding nuts and washers of appropriate thickness, for example.

[0067] In some configurations, the ladder 100b may regularly occupy an interior portion of an above-ground pool. For example, a ladder 100 may be mounted to a deck or platform or may be mounted to a second ladder 100a to form an A-frame ladder and continually extend into the pool. In such instances, an unsafe situation may arise by allowing the flexible tambour barrier 130 to be moved into the first position, thereby preventing access to the plurality of stairs while in the water. In such instances, the flexible tambour barrier 130 may be fixed in the second position as explained above. Fixing the flexible tambour 130 from being moved along the first groove 113 into the first position, inhibits pass through entry between the plurality of steps 160, and provides continual access to the plurality of steps 160 from the pool.

[0068] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms a, an, and the are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms comprise (and any form of comprise, such as comprises and comprising), have (and any form of have, such as has and having), include (and any form of include, such as includes and including), and contain (and any form of contain, such as contains and containing) are open-ended linking verbs. As a result, a method or device that comprises, has, includes, or contains one or more steps or elements possesses those one or more steps or elements, but is not limited to possessing only those one or more steps or elements. Likewise, a step of a method or an element of a device that comprises, has, includes, or contains one or more features possesses those one or more features, but is not limited to possessing only those one or more features. Furthermore, a device or structure that is configured in a certain way is configured in at least that way, but may also be configured in ways that are not listed.

[0069] The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below, if any, are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The description set forth herein has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the form disclosed. While the invention has been described by reference to various specific embodiments, it should be understood that numerous changes may be made within the spirit and scope of the inventive concepts described. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the disclosure. The embodiment was chosen and described in order to best explain the principles of one or more aspects set forth herein and the practical application, and to enable others of ordinary skill in the art to understand one or more aspects as described herein for various embodiments with various modifications as are suited to the particular use contemplated. Accordingly, it is intended that the invention not be limited to the described embodiments, but will have full scope defined by the language of the following claims.