Ladder platform and folding mechanism

Abstract

A ladder platform is provided that includes a stow mechanism coupled to the ladder. The stow mechanism includes a tray or platform coupled to one section of the ladder, and one or more struts coupled to a portion of the tray or platform and to a second section of the ladder. In some embodiments, the stow mechanism further includes a spring or flexible member coupled to a portion of the tray or platform and / or configured to apply a biasing force to a portion of the tray or platform. The stow mechanism can enable locking and unlocking of the sections of the ladder relative to each other, as well as deployment and stowage of the ladder without the platform contacting the rails of the ladder. The stow mechanism can also assist a user in easily deploying or stowing the ladder. The ladder can also include nested links to assist in deployment or stowage of the ladder.

Description

Cross-reference to related applications

[0001] This application claims the benefit of U.S. Provisional Application No. 63 / 610,685, filed on December 15, 2023, which is incorporated herein by reference in its entirety. Technical Field

[0002] This disclosure generally relates to ladders, and more specifically to ladder platforms and struts. Background Technology

[0003] Climbing equipment, such as ladders and work platforms, typically includes transverse members or links, such as struts, between the front and rear sections. These struts help hold the sections in place relative to each other. The transverse members are usually located on either side of the ladder and help lock the sections in their extended position when the ladder is fully extended. In practice, in some cases, it is necessary to push the transverse members downwards to secure the sections relative to each other.

[0004] Previously, to fold a ladder, users typically needed to apply force upwards to the crossbars to unlock them, or downwards to lock them relative to each other. Damage to the crossbars can affect the ladder's functionality. For example, applying too much force to the crossbars and / or applying the force at an angle slightly orthogonal to the direction of operation can complicate the folding of the crossbars and future use. Additionally, users often had to operate the crossbars carefully to avoid creating clamps between them, which could trap the user when the crossbars are unlocked. Attached Figure Description

[0005] This document discloses embodiments of components and devices that provide a platform, a handle, and a retraction mechanism. This specification includes accompanying drawings, in which:

[0006] Figure 1 This is a perspective view of a folding mechanism connected to a portion of a ladder in a folded position, according to various embodiments;

[0007] Figure 2 This is a rear perspective view of a folding mechanism connected to a portion of a ladder in a folded position, according to various embodiments;

[0008] Figure 3 This is a top side perspective view of a folding mechanism connected to a portion of a ladder in the unfolded position, according to various embodiments;

[0009] Figure 4 This is a top rear perspective view of a folding mechanism attached to a portion of a ladder in the unfolded position, according to various embodiments.

[0010] Figure 5 This is a cross-sectional view of a retracting mechanism attached to a portion of a ladder according to various embodiments;

[0011] Figure 6 This is a perspective view of a folding mechanism connected to a portion of a ladder in a folded position, according to various embodiments;

[0012] Figure 7 This is a side perspective view of a folding mechanism connected to a portion of a ladder in a folded position, according to various embodiments;

[0013] Figure 8 This is a top side perspective view of a folding mechanism connected to a portion of a ladder in the unfolded position, according to various embodiments;

[0014] Figure 9 This is a top rear perspective view of a folding mechanism attached to a portion of a ladder in the unfolded position, according to various embodiments.

[0015] Figure 10 This is a cross-sectional view of a retracting mechanism attached to a portion of a ladder according to various embodiments;

[0016] Figure 11 This is a perspective view of a folding mechanism connected to a portion of a ladder in an intermediate position, according to various embodiments;

[0017] Figure 12 This is a rear perspective view of a retracting mechanism, according to various embodiments, connected to a portion of a ladder in its intermediate position; and

[0018] Figure 13 This is a rear perspective view of a portion of a retracting mechanism connected to a portion of a ladder in an intermediate position, according to various embodiments.

[0019] Figure 14 This is a front perspective view of a portion of a platform and a retracting mechanism according to various embodiments, the retracting mechanism being coupled to a portion of a ladder moving toward the retracted position.

[0020] Figure 15 yes Figure 14 A partial side perspective view.

[0021] Figure 16 yes Figure 14 A portion of the front perspective view.

[0022] Figure 17 yes Figure 14 A partial rear perspective view.

[0023] Figure 18 yes Figure 14 A portion of the front perspective view.

[0024] Figure 19 yes Figure 14 A portion of the upward perspective view.

[0025] Figure 20 This is a top view of another platform and a folding mechanism connected to a ladder in the unfolded position, according to various embodiments.

[0026] Figure 21 yes Figure 20 A partial rear perspective view.

[0027] Figure 22 yes Figure 20 A partial rear perspective view.

[0028] Figure 23 yes Figure 20 A partial rear perspective view.

[0029] Figure 24 yes Figure 20 A partial rear perspective view.

[0030] Figure 25 This is a side view of another platform according to various embodiments, wherein a folding mechanism is coupled to a ladder shown in a folded position compared to an unfolded position.

[0031] Figure 26 yes Figure 25 A perspective view of a portion of the retracting mechanism linkage.

[0032] Figure 27 yes Figure 25 A perspective view of a portion of the retracting mechanism linkage.

[0033] Figure 28 The central plane portion has been removed. Figure 20 A cross-sectional view of a portion of it.

[0034] Figure 29 yes Figure 20 A detailed perspective view of a portion of it.

[0035] Figure 30 yes Figure 18 A close-up, detailed view.

[0036] Figure 31 It includes Figure 14 A perspective view of the platform and the ladder of the gathering mechanism.

[0037] Figure 32 It includes Figure 20 A perspective view of the platform and the ladder of the gathering mechanism.

[0038] Those skilled in the art will understand that the elements in the figures are illustrated for simplicity and clarity only and are not necessarily drawn to scale. For example, the size and / or relative positioning of some elements in the figures may be enlarged relative to other elements to aid in understanding the various embodiments. Furthermore, common but easily understood elements that are useful or necessary in commercially viable embodiments are generally not depicted to help to lessen the obscuring of the view of these various embodiments. It should be further understood that certain actions and / or steps may be described or depicted in a specific order of occurrence, and those skilled in the art will understand that such specificity regarding the order is not actually required. It should also be understood that, unless different specific meanings are set forth herein, the terms and expressions used herein have the ordinary technical meanings that those skilled in the art would assign to such terms and expressions as set forth above. Detailed Implementation

[0039] This disclosure relates to ladders and ladder platform mechanisms, including, for example, retraction mechanisms. The ladder platforms and retraction mechanisms described herein are generally used to assist in deploying, locking, and using ladders. For example, by providing spring-loaded handles, the ladder can be more securely locked in place, and by providing accompanying trays and platforms, the usability of the ladder can be increased. Additionally, the extended usable surface of the platform described herein can provide additional rigidity and stability to certain ladders.

[0040] Through various methods, the ladder retraction mechanism described herein can be mounted on the ladder at the location of a typical strut, for connecting the front section of the ladder to the rear section. The spring-loaded handle described herein avoids the risks associated with clamping points, which are typically created by struts. Furthermore, the ladder platform and retraction mechanism can be used to assist in moving the ladder.

[0041] In one configuration, the ladder folding mechanism includes a tray having a first end or front end connected to a front section via a hinge or pivot point, and a second end or rear end connected to a rear section via struts, fasteners, and / or other releasable mechanical mechanisms. The hinge is connected to one of a plurality of front section rungs, and at least one of the struts and fasteners is connected to one of a plurality of rear section rungs. In use, the tray includes a platform area configured to extend the usable depth of the front section rungs, i.e., allowing a user to stand on the platform section of the tray. The tray includes an opening substantially located in the center of the tray to provide a handle for facilitating the movement of the ladder when it is in the folded position. In an exemplary configuration, the tray also includes a spring-loaded handle actuated within the opening to lock the ladder in the extended position. The spring-loaded handle is typically disposed on a sliding member connected to the tray. The sliding member includes a lip located at the end of the handle, and the lip is movable by actuating the handle. In the locked state, the lip contacts a fastener located on one of the multiple rear crossbars. The lip and the fastener mechanically engage to lock the ladder in the extended or extended position. Alternatively, a mechanical arrangement or corresponding geometry can also lock or secure the ladder in a folded or retracted position.

[0042] In some configurations, the tray includes ribs located on the sides of the bottom of the tray. These ribs are configured to contact the sides of fasteners to restrict lateral movement or displacement of the tray. Additionally, in some configurations, the tray includes recesses or indentations configured to hold various tools, fasteners, and equipment. The tray may also include tool slots for use with other ladder accessories and attachments.

[0043] Another method allows the tray to be tapered to match the tapered shapes of the front and rear sections of the ladder. For example, the tray can have a first width and a second width. In some illustrative configurations, the tray has a first section and a second section, the first section having a first width and the second section having a gradually decreasing width. In this way, the tray near the hinge can have a wider width than the tray near the fastener. In this way, the size of the tray can be increased, while the size is designed to fit between the ladder beams when the ladder is folded and collapsed.

[0044] In some methods, a tapered platform is positioned between the rungs of the ladder. The tapered shape of the platform causes the struts to be angled relative to the rungs, and the struts are not perpendicular to the rungs when the ladder is in the extended position. When the ladder is extended, the first rungs of the front section and the first rungs of the rear section are substantially parallel to each other. A typical ladder includes struts that are substantially parallel to the first rungs of the front and rear sections and generally perpendicular to the rungs positioned between the rungs. By providing a tapered platform for an increased standing surface, the struts are angled relative to the first rungs of the front and rear sections when the ladder is extended. Flexible components such as springs, brackets, and housings can be used to assist in extending and retracting the tapered platform and the non-parallel struts.

[0045] In some configurations, the ladder includes a platform having a central plane portion formed of metal, which may include a textured raised pattern. The platform may include flanges or sidewalls extending orthogonally to the central plane portion. As discussed below, struts may be fixed at one end of the platform to the flanges or sidewalls. Additionally, the platform may include a front cover and / or a rear cover, which may be formed of polymeric materials, fiberglass materials, metal, and other alternative materials.

[0046] In one method, a ladder is provided comprising a front section and a rear section, each of the front and rear sections including a first ladder beam, a second ladder beam, and a plurality of rungs spaced apart between corresponding first and second ladder beams in the front and rear sections. A top of the ladder is directly connected to at least one of the front or rear sections. A platform is disposed below the top of the ladder and attached via a bracket to both the first and second ladder beams of the front section via a plurality of rivets, and the platform is attached via one or more struts to one of the rungs of the rear section. A flexible member is disposed along bolts within the bracket, the flexible member being configured to apply a biasing force to a portion of the bolts and the platform. The flexible member provides the biasing force to prevent lateral movement of the platform when the ladder is extended or retracted.

[0047] In another approach, a ladder is provided comprising a front section and a rear section, each of the front and rear sections comprising a first ladder beam, a second ladder beam, and a plurality of rungs spaced apart between corresponding first and second ladder beams in the front and rear sections. The top of the ladder is directly connected to at least one of the front or rear sections. A platform is disposed below the top of the ladder and attached via brackets to the first and second ladder beams of the front section, the brackets being connected to both the first and second ladder beams via a plurality of rivets, and the platform is attached via one or more struts and one or more L-shaped brackets to one of the rungs of the rear section. The ladder includes at least one bolt that secures the one or more L-shaped brackets and struts relative to each other. At least one spring is disposed between a portion of the at least one bolt and the one or more L-shaped brackets and is configured to apply a biasing force to the struts. The spring provides the biasing force so that the platform can move laterally when the ladder is extended or retracted.

[0048] In another configuration, a ladder is provided comprising a front section and a rear section, each of the front and rear sections comprising a first ladder beam, a second ladder beam, and a plurality of rungs spaced apart between corresponding first and second ladder beams in the front and rear sections. A top of the ladder is directly connected to at least one of the front or rear sections. A platform is disposed below the top of the ladder and attached via a bracket to both the first and second ladder beams of the front section, the bracket being connected to both the first and second ladder beams. The platform is attached via one or more struts to one of the rungs of the rear section. The one or more struts include nested links, each including an outer member and an inner member configured to at least partially extend into the outer member. The one or more struts include springs connected to the outer member and the inner member. The springs are configured to provide a biasing force to the nested links.

[0049] The ladders, components, and / or fittings described herein can be formed from a variety of materials and using a variety of manufacturing techniques. Such materials can include, for example, metals, plastics, and other polymers, and / or composite materials. Additionally, some parts of the ladder components can be formed from one material, while one or more other components or fittings can be formed from another similar or completely different material. In some constructions, the ladder beams can be formed from composite materials such as glass fiber or glass fiber reinforced plastic (FRP) and can be manufactured via a pultrusion process. FRP materials can contain various plastic resins, such as polyurethane or polyethylene, or can contain various glass materials. It has been considered that adjusting the FRP formulation to use different material combinations can reduce material weight and / or cost. Ladder beams can also be formed from metallic materials such as aluminum or aluminum alloys and can be manufactured via an extrusion process. After extrusion or pultrusion, the ladder beams are typically cut to the desired length. For box-shaped ladder beams, a computer numerical control (CNC) machine can machine or form one or more holes in the ladder beam. For other shapes of ladder beams, such as C-shaped or I-shaped ladder beams, one or more holes can be punched in the ladder beam using other tools such as a punch press.

[0050] The rungs of a ladder can be formed from composite materials such as glass fiber or carbon fiber. In some methods, the rungs can also be formed from metallic materials such as magnesium, magnesium alloys, aluminum, or aluminum alloys. For example, the rungs can be manufactured by an extrusion process and cut to the desired length. The rungs can take various shapes and can be, for example, circular, D-shaped, or triangular. In addition, the rungs can have a hollow or substantially hollow cross-section.

[0051] The rungs of a ladder can be attached to the ladder beam in various ways. In one method, the rungs and the ladder beam are forged together, for example, by attaching the rungs to the ladder beam via a direct die forging connection. In a direct die forging connection, the rungs are attached directly to the ladder beam using a cold forming process, wherein a moving die shapes the rungs around pre-punched holes in the ladder beam. An annealing operation can be used to soften the metal to prevent cracking. In other methods, among other attachment types, the rungs are also attached to the ladder beam via a rung plate connection. In a rung plate connection, the rungs are attached to a plate, and the plate is attached to the ladder beam via one or more rivets or other mechanical elements.

[0052] Other parts, fittings, and / or components used in the ladder, such as legs, locks, ropes, rope pulleys, end caps, and / or knee supports, can be made of materials such as rubber or plastics (e.g., polypropylene or any other suitable plastic). Plastic parts can be injection molded or insert molded. In some methods, fittings and components, such as guide brackets, legs, knee supports, and / or locks, can be formed, extruded, or stamped from metallic materials such as aluminum, aluminum alloys, steel, or sheet metal. Rubber legs can be riveted to the base of the ladder. Metal locks can be extruded and then cut to the desired length. Rope pulleys can comprise extruded metal side portions and plastic circular pulleys formed from injection-molded plastic, wherein the side portions and pulleys are secured together by rivets. During assembly, end caps can be riveted or snap-fitted to the ladder. Similarly, knee caps can be riveted to the ladder.

[0053] Generally, the various embodiments and systems described herein can be used to provide platform mechanisms comprising a ladder-mounting mechanism, which can serve as a platform and tray to increase stability and usability while potentially eliminating potential gripping points for the user. In one illustrative method, the ladder-mounting mechanism includes a tray hinged to a front section of the ladder and coupled to a strut disposed on a rear section. The strut may additionally or alternatively be coupled to a fastener disposed on the rear section. The tray includes a sliding member disposed on its underside. The tray and the sliding member include an opening and a handle disposed in the opening. The handle includes a lip located at at least one end of the sliding member, the lip being configured to interact with the fastener to lock and unlock the tray relative to the fastener.

[0054] In some embodiments, the tray includes one or more ribs disposed on the underside and configured to contact the fasteners to help increase the rigidity of the tray and ladder by inhibiting lateral movement or displacement of the tray and ladder beams. In some configurations, the ribs also help reinforce the platform. The handle may include a torsion spring so that the handle can be actuated to lock the lip onto the fasteners, and the handle returns to the locked state once it is released.

[0055] In another embodiment, the tray may include tool slots or accessory slots near the fasteners, allowing other accessories to slide into the tool slots to facilitate ladder storage and / or use. Additionally, the tray may include notches, tool openings, channels, and various side openings to hold various fasteners, tools, or equipment accessories. The tray may also be magnetized to help retain metal plates on the tray. The tray may also include a platform area near the hinges, which provides a standing area for the user and increases the depth of the rungs. In some methods, the tray may be removable. In this way, the tray may be a panel, allowing the user to replace the tray or panel as needed. The tray may be configured to provide a shelf area on the ladder.

[0056] Referring to the accompanying drawings, where similar reference numerals are used throughout several views to refer to similar or identical parts, and in particular, Figure 1 The ladder 100 is described, comprising a top 102, a front section 104, a rear section 114, and a platform mechanism, the platform mechanism including a folding mechanism 111. The front section 104 includes a first ladder beam 106, a second ladder beam 108, and a plurality of rungs 110. Similarly, the rear section 114 includes a first ladder beam 116, a second ladder beam 118, and a plurality of rungs 120.

[0057] The ladder 100, and more specifically the retracting mechanism 111, includes a tray 112 connected to one of a plurality of rungs 110. The tray 112 is disposed between the rungs of the ladder 100. Figure 1 As shown, ladder 100 is in a folded or stowed position. In this position, tray 112 is folded inside the ladder beams. In this way, tray 112 is tapered to include at least a portion of tray 112 that is substantially parallel to the non-parallel ladder beams. This allows tray 112 to encompass a larger usable area.

[0058] refer to Figure 2 The tray 112 of the retracting mechanism 111 includes a sliding member 152 disposed on the bottom surface of the tray 112. The sliding member 152 includes a handle 130. The handle 130 is spring-loaded and actuable toward the crossbar 110 to which the tray 112 is attached. The retracting mechanism 111 includes an opening 140 in the sliding member 152, and the handle 130 is disposed within the opening 140. Furthermore, the opening 140 extends through the tray 112, allowing the user to place their hand within the handle 130 and actuate the handle. In this way, the opening 140 also provides a position for picking up and carrying the ladder 100. Due to the circular shape of the opening 140, this provides a more comfortable grip position for the user when carrying the ladder 100.

[0059] The sliding member 152 includes a lip 138 disposed at each end of the sliding member 152. The tray 112 includes alignment geometry 136 or ribs disposed on the underside of the tray 112 facing the top of the tray 112. Figure 2 As shown. The tray 112 also includes a strut 134 that connects the tray 112 to at least one of the plurality of crossbars 120 or fasteners 132. In this configuration, the strut 134 is disposed inside one side of the tray 112. In this way, the strut 134 is covered, and potential clamping points on the ladder 100 are eliminated.

[0060] The retraction mechanism 111 also includes a fastener 132. The fastener 132 is disposed on one of the plurality of crossbars 120. The fastener 132 is shaped to receive an alignment geometry 136 and helps maintain the lateral rigidity of the tray 112 and ladder 100 when they are in the extended or retracted positions. The lip 138 of the sliding member 152 interacts with the fastener 132 to hold the tray 112 in the extended or retracted position. In some configurations, a strut 134 is coupled to the fastener 132, which is coupled to one of the crossbars 120.

[0061] refer to Figure 3 and 4 The folding mechanism 111 includes a hinge 146 that connects the tray 112 to one of a plurality of crossbars 110. The folding mechanism 111 further includes a platform 142 and a recessed area 144. The platform 142 provides additional depth to the crossbar 110 to which the tray is connected. The depth of the platform 142 may be, for example, between 2 and 4 inches, to allow a user to stand. In this way, the stability of the user standing on the ladder 100 can be enhanced. The platform 142 may be textured to increase its surface area and help prevent slipping on it.

[0062] The retractable mechanism 111, and more specifically the tray 112, may also include a recessed area 144. The recessed area 144 provides a location for the user to place various parts, fasteners, tools, and equipment. In some embodiments not shown, the tray 112 may include tool slots at its ends for sliding engagement with tool slot fittings. In yet another embodiment not shown, the tray 112 may include a magnetized area, openings for tool placement, channels for holding various pipes, conduits, or tools, or may include power tool openings for placing various power tools therein.

[0063] refer to Figure 5 The image shows a cross-section of the tray 112. Both ends of the sliding member 152 include lips 138. The lips 138 interact with the extensions 156 of the fastener 132. Figure 5The ladder 100 is included in the retracted position. In this manner, the bottom lip 138 interacts with the extension 156 to hold the ladder 100 in the retracted state. In the extended position, the top lip 138 interacts with the extension 156 to hold the ladder 100 in the extended state. Because the handle 130 is spring-loaded, it remains stationary once the ladder 100 is in either the extended or retracted position. When the opening 140 is used as a handle for easy carrying, the retraction mechanism not only facilitates easy carrying of the ladder 100 but also keeps it in the retracted state during transport because the bottom lip 138 interacts with the extension 156 and the handle 130 is spring-loaded to hold the ladder 100 in the retracted state.

[0064] refer to Figures 6 to 12 The ladder 100 is shown comprising the various elements described above, including a retracting mechanism 111. In this configuration, the tray 113 is shown having a generally rectangular shape. The tray 113 includes many elements similar to those in the tray 112. Additionally, the tray 113 includes an alignment geometry 136 disposed on the bottom side of the tray 113, rather than at the top center. Furthermore, the sliding member 152 includes a side having a lip 138 configured to hold the ladder 100 in the extended position.

[0065] refer to Figure 13 The ladder 100, particularly the rear section 114, is shown to include a retraction mechanism 111. In this embodiment, the tray 115 is shown to include an alignment geometry. The alignment geometry includes a protrusion 137 disposed on the underside of a corner of the tray 115. The alignment geometry further includes an opening 139 disposed within one of a plurality of rungs 120 on the top surface of the alignment geometry. In this way, the protrusion 137 can engage with the opening 139 to properly align the tray 115. The alignment geometry also increases the rigidity of the tray 115, thereby increasing the overall rigidity of the ladder 100. By providing the protrusion 137 and the opening 139, the retraction mechanism 111 can be more securely locked.

[0066] In use, the user can move the ladder by means of the opening in the retracting mechanism. Once the ladder is in the desired position, the user can actuate the handle located in the opening. To actuate the handle, pull it toward the front section of the ladder. If the ladder is upright and the retracting mechanism is locked, the handle is pulled essentially downwards. When pulled, the lip of the sliding member disengages from the extension of the fastener, allowing the front and rear sections to move relative to each other.

[0067] Once the ladder is in the extended position, the handle can be actuated again, allowing the other lip of the sliding member to interact with the extension of the fastener. In some configurations, instead of actuating the handle, the tray can be pushed down to move the lip into engagement with the extension. In this way, the ladder is now in the extended position and ready for use. In the extended position, the folding mechanism provides additional support through the platform area and additional storage space through the recessed area.

[0068] In some embodiments described herein, the ladder retraction mechanism utilizes struts as links, as well as portions of the associated platform and associated brackets, springs, and mechanical connectors such as pins, bolts, and rivets. For example, a portion of the platform, such as its flange or sidewall, may be connected to a first ladder beam in the front section, and the strut may be connected to a portion of the rear section (e.g., a rung or reinforcing member). In an illustrative configuration, the flange and strut are connected via a pivot point (e.g., a rivet or pin).

[0069] Additionally, the mechanisms described herein may include varying biasing forces provided via springs or the like to facilitate the continued use of the ladder. This may include, for example, a lateral movement limiter for the platform preventing contact with the ladder beams, a lateral movement mechanism allowing the struts to move laterally and facilitating the unfolding or retraction of the ladder, or nested linkages facilitating the unfolding or retraction of the ladder. In the embodiments described herein, the struts may include an over-center design. When unfolded, the force generated by the over-center design is greater than any of the biasing forces described herein. In this way, the biasing force can be used as an aid to operating and using the ladder without compromising its safety. For example, the biasing force assisting in retracting the ladder will be less than the force generated by the over-center design of the struts. The biasing force described herein may be a fraction of the force generated by the over-center design, for example, approximately 20% or less.

[0070] refer to Figures 14 to 19 Figures 31 and 31 show a portion of a ladder 200, including a top 202, a front section 204, and a rear section 214. The front section 204 includes a first front ladder beam 206 and a second front ladder beam 208. The rear section 214 includes a first front ladder beam 216 and a second rear ladder beam 218. A plurality of rungs 210 extend between the first front ladder beam 206 and the second front ladder beam 208. Similarly, a plurality of rungs or reinforcing members 220 extend between the first rear ladder beam 216 and the second rear ladder beam 218. The ladder 200 further includes a platform 222 configured for a user to stand on.

[0071] In some configurations, platform 222 includes a central planar portion 224 formed of metal, which may include a textured raised pattern. By one method, platform 222 further includes a pair of overhanging flanges 222a, 222b orthogonally disposed to the central planar portion 224. Figure 17 As shown, the overhanging flanges 222a and 222b, typically formed of metal, are portions of the platform 222 to which the strut 262 is fastened (e.g., via rivets or screws). Additionally, the platform 222 may include a front cover 226 and / or a rear cover 228. In some illustrative configurations, the front cover 226 and the rear cover 228 may be formed of polymeric materials, fiberglass materials, or metals, as well as other alternative materials.

[0072] As described above, flanges 222a and 222b can be connected to the first front ladder beam 206 and the second front ladder beam 208 of the front section 204, respectively, and strut 262 can be connected to a portion of the rear section 214 (e.g., one of the crossbars or reinforcing members 220). More specifically, flanges 222a and 222b of platform 222 are connected to the first front ladder beam 206 and the second front ladder beam 208 via one or more pins 268, which pass through corresponding openings in flanges 222a and 222b and openings in brackets 260a and 260b. As discussed in more detail below, brackets 260a and 260b are connected to the first front ladder beam 206 and the second front ladder beam 208. Figure 17 This describes a pivotable connection 270 formed between one end of the strut 262 and the flange 222a via one or more rivets 269. Figure 17 It is also shown that the other end of the strut 262 is connected to the L-shaped bracket 271 via another rivet 269, which extends through an opening at one end of the strut 262 and an opening in the L-shaped bracket 271.

[0073] In one illustrative configuration, platform 222 is connected via bracket 260 or housing to the first front ladder beam 206 and the second front ladder beam 208 of the front section 204. (See also...) Figure 19 As shown, the rear cover 228 has an opening therein to secure the rear cover 228 to the central plane portion 224.

[0074] like Figure 16As shown, when in use, platform 222 is positioned below the top 202 of the ladder and above the uppermost rung of the plurality of rungs 210. Platform 222 is connected to struts 262 located on each side of platform 222. Struts 262 are positioned within the periphery of platform 222 such that, in the extended position, struts 262 are positioned below platform 222. Struts 262 are also connected to one of the rungs or reinforcing members 220. In use, struts 262 function as connecting rods to connect platform 222 to the uppermost rung or reinforcing member of the plurality of rungs or reinforcing members 220.

[0075] exist Figure 14 In the embodiment, when in the unfolded position, platform 222 tapers gradually from its wider base adjacent to the front section 204 (i.e., adjacent to the first front ladder beam 206 and the second front ladder beam 208) towards its narrower end adjacent to the first rear ladder beam 216 and the second rear ladder beam 218. Due to the tapered shape of platform 222, when opened in this configuration, strut 262 is angled relative to the ladder beams. This causes lateral displacement of strut 262 as ladder 200 unfolds and retracts. To prevent lateral movement of platform 222 due to the movement of strut 262, a lateral movement limiter 264 can be used.

[0076] Figure 19 The illustrated lateral movement limiter 264 includes a bracket 260 connected to a ladder beam on one side via rivets 273 and to a platform 222 on the other side via one or more pins or bolts 268. The pins or bolts 268 include one end disposed between the bracket 260 and the corresponding ladder beam, and a second end disposed through an opening in the platform 222. The lateral movement limiter 264 also includes a flexible member 266 disposed on a portion (e.g., a shaft) of the pins or bolts 268. The flexible member 266 is configured to apply a biasing force to the pins or bolts 268 and the platform 222. The flexible member 266 provides a biasing force to prevent lateral movement of the platform 222 when the ladder is extended or retracted.

[0077] The biasing force provided by the flexible member 266 can be provided inward or outward. That is, depending on the type of flexible member 266, the biasing force can provide an inward force on each side of the platform 222 or an outward force on each side of the platform 222. The biasing force is configured to keep the platform 222 centered between the ladder beams when the ladder 200 is extended and retracted.

[0078] For details, please refer to the following: Figure 19 and 30 One or more pins or bolts 268 extend through or are partially disposed in openings in brackets 260a and 260b. The pins or bolts 268 typically include a flexible member 266 disposed thereon or associated with them. For example, as... Figure 30 As shown in the close-up portion 290, from Figure 18 Initially, a flexible member 266 may be positioned along its axis between the heads of one or more pins or bolts 268. In some configurations, the flexible member 266 extends from the head of the pin or bolt 268 to the bracket 260b. Another portion of the one or more pins or bolts 268 is positioned through an opening in the platform 222, such that said portion is engaged with the platform 222. As described above, the biasing force provided by the flexible member 266 typically pushes or pulls the one or more pins or bolts 268 engaged with one end of the platform 222, thereby providing a centering force for the platform 222. The centering force may be inward or outward, depending on the type of flexible member 266. The flexible member 266 may be, for example, a spring, a tension or compression spring, a rubber gasket, a grommets, and / or bushings.

[0079] In some configurations, the lateral movement limiter 264 can assist in limiting the left and right movement of the platform 222 as it rotates. The flexible member 266 can be, for example, a wave spring disposed within each lateral movement limiter 264 and configured to provide equal and opposite forces to each other, thereby centralizing the forces in the platform 222 and enabling more continuous operation of the platform.

[0080] refer to Figures 20 to 24 Figures 28, 29, and 32 illustrate a ladder 300 (or a portion thereof). The ladder 300 typically includes a top 302, a front section 304, and a rear section 314. The front section 304 includes a first front ladder beam 306 and a second front ladder beam 308. The rear section 314 includes a first rear ladder beam 316 and a second rear ladder beam 318. A plurality of rungs 310 extend between the first front ladder beam 306 and the second front ladder beam 308. Similarly, a plurality of rungs or reinforcing members 320 extend between the first rear ladder beam 316 and the second rear ladder beam 318. The ladder 300 further includes a platform 322, which is typically configured to support the weight of a user (i.e., for the user to stand on). The ladder 300, and more specifically the platform 322, may also include handles 330 or openings for facilitating carrying or lifting of the ladder 300.

[0081] Similar to platform 222, platform 322 is connected via bracket 360 or housing to the first front ladder beam 306 and the second front ladder beam 308 of the front section 304. Platform 322 is typically located below the top of the ladder (see, for example...). Figure 32The platform 322 is positioned above the uppermost of the plurality of crossbars 310. In some configurations, the platform 322 is connected to struts 362 located on each side of the platform 222, for example via flanges or sidewalls provided along one side of the platform. The struts 362 are positioned within the periphery of the platform 322 such that, in the extended position, the struts 362 are positioned below the platform 322. Alternatively, in this configuration, the struts 362 are positioned substantially parallel to the periphery of the platform 322. The L-shaped bracket 372 is connected to one of the crossbars or reinforcing members 320 via one or more rivets 373. The strut 362 is connected to the L-shaped bracket 372 via one or more pins or bolts 376. The strut 362 serves as a connecting rod to connect the platform 322 to the uppermost of the plurality of crossbars or reinforcing members 320.

[0082] In some configurations, the ladder 300 includes a lateral movement mechanism 370, which comprises at least one spring 374 disposed between a portion of one or more pins or bolts 376 and an L-shaped bracket 372. The at least one spring 374 is typically configured to provide a biasing force on the strut 362, allowing the platform 322 to move laterally when the ladder 300 is extended or retracted. As described above, due to the tapered shape of the platform 322, the strut 362 is angled relative to the ladder beam when the ladder is extended, causing lateral displacement of the strut 362 during the extension and retraction of the ladder 300. The at least one spring 374 allows the strut 362 to move / displace laterally.

[0083] Depending on the type of spring 374, the biasing force can be applied inward toward the center of platform 322 or outward toward the ladder beam. This biasing force applied to the strut 362 in a specific direction can assist the ladder 300 in closing or opening. For example, when a biasing force is applied toward the center of platform 322, the biasing force assists the ladder 300 in closing. In some embodiments, when a biasing force is applied toward the ladder beam and away from platform 322, the biasing force assists the ladder 300 in opening. As described above, the biasing force provided by at least one spring 374 is less than the biasing force generated by the over-center design of the strut 362. At least one spring 374 can be a compression spring or a tension spring to provide the corresponding biasing force to assist in opening and closing the ladder 300.

[0084] For details, please refer to the following: Figure 22 , 2829. A portion (e.g., its end) of one or more pins or bolts 376 extends through an opening in the strut 362 and engages the one or more pins or bolts 376 to the strut 362. Another portion of one or more pins or bolts 376 extends through a portion of the L-shaped bracket 372 and typically includes at least one spring 374 disposed thereon, for example, between the heads of one or more pins or bolts 368 on the side of the L-shaped bracket 372. As described above, a biasing force provided by at least one spring 374 pushes or pulls the engagement of one or more pins or bolts 376 to one end of the strut 362, thereby allowing the strut 362 to move laterally when the ladder 300 is extended or retracted. The biasing force can be inward or outward, depending on the type of spring 374. The spring 374 can be, for example, a tension or compression spring.

[0085] A lateral movement mechanism 370, comprising a tapered platform 322 and an angled strut 362, assists in deploying and / or retracting the ladder 300. A spring 374 allows the angled strut 362 to move laterally. The strut 362 is substantially parallel to the angle of the tapered platform 322. In this way, a compression or tension spring can be used to assist in deploying or retracting the ladder 300, while also allowing lateral displacement by the strut 362.

[0086] refer to Figures 25 to 27 The image shows a ladder 400 (or a portion thereof). The ladder 400 typically includes a top 402, a front section 404, and a rear section 414. The front section 404 includes a first front ladder beam 406 and a second front ladder beam 408. The rear section 414 includes a first rear ladder beam 416 and a second rear ladder beam 418. A plurality of rungs 410 extend between the first front ladder beam 406 and the second front ladder beam 408. Similarly, a plurality of rungs or reinforcing members 420 extend between the first rear ladder beam 416 and the second rear ladder beam 418. The ladder 400 further includes a platform 422 configured for a user to stand on. The ladder 400, and more specifically the platform 422, may also include nested links 480 disposed below the periphery of the platform 422. Figure 25 The rear ladder beam 416 of the ladder 400 is shown in the retracted position with a solid line, and for illustrative purposes, the rear ladder beam 416 is also depicted in the extended position with a dashed line.

[0087] The nested link 480 includes a first link 482, an outer member, a second link 484, and an inner member. The first link 482 includes a groove 488. The second link includes a post 490 disposed within the groove 488 and configured to slide within the groove 488. The first link 482 and the second link 484 are also connected via a spring 486 connected to each of the first link 482 and the second link 484. The spring 486 provides a biasing force to the nested link 480. By utilizing the nested link 480, the length of the support rod 462 can be extended when the ladder is extended, while maintaining a shorter length when the ladder 400 is retracted.

[0088] The support rod 462, located below the periphery of platform 422, restricts the overall size, particularly the length of the support rod 462. This could make it more difficult to unfold and retract ladder 300. By extending support rod 462, the associated leverage is increased, which in turn facilitates easier unfolding and retraction of ladder 400. Nested linkage 480 also allows support rod 462 to remain positioned below the periphery of platform 422.

[0089] Those skilled in the art will recognize that a wide variety of modifications, alterations, and combinations can be made to the above embodiments without departing from the scope of this disclosure, and that such modifications, alterations, and combinations are considered to be within the scope of the disclosed concepts.

Claims

1. A ladder comprising: The front section and the rear section each include a first ladder beam, a second ladder beam and a plurality of crossbeams, the plurality of crossbeams being spaced apart between the corresponding first ladder beam and second ladder beam of the front section and the rear section respectively; The top of the ladder is directly connected to at least one of the front section or the rear section; as well as A retracting mechanism, disposed below the top of the ladder, is hinged to one of the plurality of front rungs, the retracting mechanism comprising: The tray, which is connected to the hinge, A strut, attached to the tray and one of the plurality of rear section crossbars, and A sliding member, coupled to the tray, includes at least one lip disposed at a top or bottom end of the sliding member and configured to interact with one of the plurality of rear section crossbars. Actuating the sliding member causes at least one lip to move from one of the plurality of rear section crossbars and unlock the ladder.

2. The ladder of claim 1, wherein the tray further includes a platform section that is generally flat and can be used as a support surface, and one of the plurality of rear section rungs includes a fastener configured to receive the at least one lip of the sliding member.

3. The ladder of claim 2, wherein the platform section of the tray has a depth of approximately 2-6 inches, and wherein the tray further includes a recessed area.

4. The ladder of claim 1, wherein the tray further comprises at least one of a magnetized surface and a tool receiving slot.

5. The ladder of claim 1, wherein the sliding member further comprises a spring-loaded handle, wherein the spring-loaded handle comprises a torsion spring.

6. The ladder of claim 1, further comprising an alignment geometry disposed on the sliding member, wherein the strut is disposed within the side portion of the tray.

7. The ladder of claim 1, wherein one of the plurality of rear section rungs includes an extension configured to interact with the lip of the sliding member.

8. A ladder comprising: The front section and the rear section each include a first ladder beam, a second ladder beam and a plurality of crossbeams, the plurality of crossbeams being spaced apart between the corresponding first ladder beam and second ladder beam of the front section and the rear section respectively; The top of the ladder is directly connected to at least one of the front section or the rear section; A platform is disposed below the top of the ladder, the platform being attached to the first and second ladder beams of the front section via a bracket, the bracket being connected to both the first and second ladder beams via a plurality of rivets, and the platform being attached to one of the plurality of crossbars of the rear section via one or more struts. as well as A flexible member, disposed along the bolt within the bracket, is configured to apply a biasing force to a portion of the bolt and the platform. The flexible member provides a biasing force to prevent the platform from moving laterally when the ladder is extended or retracted.

9. The ladder of claim 8, wherein the biasing force is directed toward the center of the platform.

10. The ladder of claim 8, wherein the biasing force is directed toward the first ladder beam and the second ladder beam of the front section.

11. The ladder of claim 8, wherein the one or more struts are configured to be disposed within the periphery of the platform.

12. The ladder according to claim 8, wherein the flexible member is at least one of a spring, a rubber gasket, a grommets, or a bushing.

13. The ladder of claim 8, wherein the platform tapers gradually from the wider end adjacent to the front section to the narrower end adjacent to the rear section.

14. A ladder comprising: The front section and the rear section each include a first ladder beam, a second ladder beam and a plurality of crossbeams, the plurality of crossbeams being spaced apart between the corresponding first ladder beam and second ladder beam of the front section and the rear section respectively; The top of the ladder is directly connected to at least one of the front section or the rear section; A platform is disposed below the top of the ladder, the platform is attached to the first and second ladder beams of the front section via a bracket, the bracket is connected to both the first and second ladder beams via a plurality of rivets, and the platform is attached to one of the plurality of crossbars of the rear section via one or more struts and one or more L-shaped brackets. At least one bolt, which secures the one or more L-shaped brackets and the one or more struts of the rear section relative to each other; as well as At least one spring is disposed between a portion of the at least one bolt and the one or more L-shaped brackets, and is configured to apply a biasing force to the strut. The at least one spring provides a biasing force so that the platform can move laterally when the ladder is extended or retracted.

15. The ladder of claim 14, wherein the platform comprises a tapered periphery extending from the wider end adjacent to the front section to the narrower end adjacent to the rear section.

16. The ladder of claim 15, wherein the one or more struts are parallel to the conical periphery.

17. The ladder of claim 15, wherein the one or more struts are configured to be disposed within the conical periphery of the platform.

18. The ladder of claim 14, wherein the biasing force is directed toward the center of the platform.

19. The ladder of claim 18, wherein the biasing force facilitates the closing of the ladder.

20. The ladder of claim 14, wherein the biasing force is directed toward the first ladder beam and the second ladder beam of the front section.

21. The ladder of claim 20, wherein the biasing force facilitates the unfolding of the ladder.

22. The ladder according to claim 14, wherein the at least one spring is a compression spring or a tension spring.

23. The ladder of claim 14, wherein the platform comprises a central plane portion formed of metal and a front end cap and a rear end cap.

24. The ladder of claim 23, wherein the front end cover of the platform includes an opening.

25. A ladder comprising: The front section and the rear section each include a first ladder beam, a second ladder beam and a plurality of crossbeams, the plurality of crossbeams being spaced apart between the corresponding first ladder beam and second ladder beam of the front section and the rear section respectively; The top of the ladder is directly connected to at least one of the front section or the rear section; as well as A platform is disposed below the top of the ladder, the platform being attached to the first and second ladder beams of the front section via a bracket, the bracket being connected to both the first and second ladder beams, and the platform being attached to one of the plurality of rungs of the rear section via one or more struts. The one or more struts include nested links, each nested link comprising an outer member and an inner member configured to at least partially extend into the outer member. The one or more struts include springs connected to the outer member and the inner member, wherein the springs are configured to provide a biasing force to the nested link.

26. The ladder of claim 25, wherein the one or more struts are configured to be disposed within the periphery of the platform.

27. The ladder of claim 25, wherein the spring is a compression spring, and the biasing force facilitates the closing of the ladder.

28. The ladder of claim 25, wherein the spring is a tension spring, and the biasing force facilitates the unfolding of the ladder.

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