Intermediate posture adapters, systems, chairs, and workspaces

Abstract

Intermediate posture systems (e.g., adapters and / or kits) for chairs are provided, in addition to chairs having intermediate posture systems. The intermediate posture systems include a foot platform assembly couplable to the chair base and having a foot platform. The intermediate posture systems further include a leanback assembly couplable to the chair seatback via a bracket and having a leanback forming a leanback surface. The foot platform assembly and the leanback assembly are configurable into an intermediate posture configuration in which the chair seatback supports at least a portion of the leanback surface above the seatback in an orientation opposing the seatback, and wherein the foot platform is alignable with the leanback surface.

Description

INTERMEDIATE POSTURE ADAPTERS, SYSTEMS, CHAIRS, AND WORKSPACESCROSS REFERENCE

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 661,874, filed June 19, 2024; U.S. Provisional Patent Application No. 63 / 668,948, filed July 9, 2024; and U.S. Provisional Patent Application No. 63 / 749,694, filed January 26, 2025. The entire contents of each of the above applications are incorporated herein by reference in entirety for all purposes.TECHNICAL FIELD

[0002] The present disclosure relates to the field of furniture.BACKGROUND

[0003] Adjustable height desks, i.e., desks that have a worktop positioned at a height suitable for access by a person in a standing position or adjustable to such a height, are becoming increasingly common as people look for flexibility to adjust their body position while working at the desk for long periods of time, particularly when using a computer. Such desks are typically provided with a worktop having an adjustable height to allow the user to raise the worktop to a suitable height when working in a standing position. When the user desires to work from a sitting position, the user may lower the worktop to a height suitable for access from a sitting position in a typical office chair.

[0004] Such adjustable height desks present limitations to the typical user. For example, when the user is in the standing position, the typical task seat or chair does not provide any physical support or assistance to the user to maintain a comfortable standing position for extended periods of time while working at the desk. As such, the user is prone to fatigue and lose focus on their posture and begin to slouch forward and look for a comfortable and stable posture.

[0005] Known furniture generally does not include reconfigurable chairs, furniture systems, adapters, or kits that enable the user to sit and also support the user in intermediate postures between sitting and standing, for example leaning. WO2024148273A1 to Reus describes reconfigurable chairs that greatly improve the range of intermediate postures available to a user. US2012 / 0319444A1 to Onopa describes a sitting and standing chair. However, neither reference teaches intermediate posture systems designed to integrate with the design and structure of common task chairs, e.g., by retrofitting.BRIEF SUMMARY

[0006] In an aspect, the present disclosure provides intermediate posture systems (e.g., adapters and / or kits) for chairs. Such intermediate posture adapters include a foot platform assembly that can be coupled to the chair base and includes a foot platform, optionally with one or more ground anchors extending away from the foot platform. The intermediate posture adapters also include a leanback assembly that can be coupled to the seatback via a bracket and, in some embodiments, includes a leanback forming a leanback surface and / or a posterior support assembly. When coupled to the chair, the foot platform assembly and the leanback assembly are configurable into an intermediate posture configuration in which the seatback supports at least a portion of the leanback surface above the seatback in an orientation opposing the seatback, and a centerline of the foot platform is axially alignable (e.g., about a support column of the chair base) with a centerline of the leanback surface. In some embodiments, the leanback assembly includes a retractable frame supporting the leanback. The bracket may be couplable to the seatback through various means such as clamps, fasteners, or other attachment mechanisms, and may extend away from a rear side of the seatback. When clamps are used, they may be configured to clamp around a perimeter edge of the seatback (e.g., a top and sides) or other suitable attachment points. In some embodiments, the foot platform assembly and leanback assembly are configurable between the intermediate posture configuration and a stowed configuration in which portions of the leanback surface stow adjacent to the rear side of the seatback. During transitions between configurations, the leanback may rotate relative to the seatback about a hinge of the leanback assembly, slide relative to the seatback along a track of the leanback assembly, fold relative to the seatback, or collapse relative to the seatback. In some embodiments, the leanback surface itself may fold, roll, collapse, or otherwise stow during such transitions. Some embodiments include a posterior support assembly as part of the leanback assembly, which optionally may be positioned relative to a shoulder surface such that they are disposed on opposite sides of a fulcrum of the leanback assembly in the intermediate posture configuration. The bracket may be operably coupled to the posterior support assembly in suitable arrangements. The foot platform may include features such as a wheel receiver formed as an aperture or recess, and when a wheel of the chair base is received within such a wheel receiver, a footing surface of the foot platform assembly may form an interior angle with a ground surface of about 5 to 15 degrees. The foot platform assembly may further include anengagement member configured to secure the chair base to the foot platform assembly when a wheel of the chair base is received within the wheel receiver.

[0007] In another aspect, the present disclosure provides chairs comprising intermediate posture systems, e.g., as an integrated option that includes the leanback assemblies and / or foot platform assemblies according to any aspect described herein. In another aspect, the present disclosure provides leanback assemblies and foot platform assemblies for intermediate posture systems as described herein. In another aspect, the present disclosure provides product lines comprising a plurality of different intermediate posture systems, wherein each different intermediate posture system comprises a leanback assembly and / or a foot platform assembly as described herein. In another aspect, the present disclosure provides workspaces comprising an intermediate posture system and one or both of a chair and a desk (e.g., an adjustable height desk).BRIEF DESCRIPTION OF THE DRAWINGS

[0008] For a more complete understanding of the present disclosure, reference is now made to the following descriptions taken in conjunction with the accompanying figures, in which:

[0009] FIG. 1A shows a side perspective view of a chair provided with an intermediate posture system (here, an intermediate posture adapter) according to an embodiment of the present disclosure, in an intermediate posture configuration.

[0010] FIG. IB shows a rear perspective view of the chair and intermediate posture system of FIG. 1 A, wherein the intermediate posture system is in a stowed configuration.

[0011] FIG. 1C shows a front perspective view of the chair and intermediate posture system of FIG. 1A.

[0012] FIG. ID shows another rear perspective view of the chair and intermediate posture system of FIG. 1A, wherein the intermediate posture system is in the stowed configuration.

[0013] FIG. ID shows another front perspective view of the chair and intermediate posture system of FIG. 1A, wherein the intermediate posture system is in the stowed configuration.

[0014] FIG. 2A schematically illustrates a side elevation view of aspects of a chair provided with an intermediate posture system of the present disclosure, in an intermediate posture configuration.

[0015] FIG. 2B schematically illustrates a top plan view of aspects of the chair provided with the intermediate posture system of FIG. 2A.

[0016] FIG. 3A - FIG. 3E show a chair provided with an intermediate posture system according to another embodiment of the present disclosure.

[0017] FIG. 4A - FIG. 4E show a foot platform assembly according to another embodiment of the present disclosure.

[0018] FIG. 5A - FIG. 5D show another foot platform assembly according to the present disclosure.

[0019] FIG. 6A - FIG. 6D show another foot platform assembly according to the present disclosure.

[0020] FIG. 7A - FIG. 7D show another foot platform assembly according to the present disclosure.

[0021] FIG. 8A - FIG. 8C show another foot platform assembly according to the present disclosure.

[0022] FIG. 9A - FIG. 9C show another foot platform assembly according to the present disclosure.

[0023] FIG. 10A - FIG. 10C show another foot platform assembly according to the present disclosure.

[0024] FIG. 11 A - FIG. 1 IB show another foot platform assembly according to the present disclosure.

[0025] FIG. 12A - FIG. 12C show another foot platform assembly according to the present disclosure.

[0026] FIG. 13A - FIG. 13C show another foot platform assembly according to the present disclosure.

[0027] FIG. 14A - FIG. 14C show another leanback assembly according to the present disclosure.

[0028] FIG 15A - FIG. 15C show another leanback assembly and foot platform assembly according to the present disclosure.

[0029] FIG. 16A - FIG. 16C show a posterior support assembly according to the present disclosure.

[0030] FIG. 17A - FIG. 17C show another posterior support assembly according to the present disclosure.

[0031] FIG. 18A - FIG. 18B show a leanback assembly according to the present disclosure.

[0032] FIG. 19A - FIG. 19C show a foot platform alignment assembly for an intermediate posture system according to the present disclosure.

[0033] FIG. 20A - FIG. 20C show another foot platform alignment assembly for an intermediate posture system according to the present disclosure.DETAILED DESCRIPTION

[0034] The present disclosure provides solutions for enabling intermediate postures between sitting and standing, particularly leaning and perching "intermediate postures" that offer ergonomic benefits compared to prolonged sitting or standing. These intermediate posture systems include, e.g., modular intermediate posture adapters or kits that can be retrofitted to existing chairs (particularly task seating chairs). The present disclosure also includes chairs incorporating such intermediate posture systems, and individual aspects of said systems.

[0035] As used herein, an "intermediate posture" means a posture between sitting and standing. Sitting is characterized by a trunk-thigh angle of about 85-95 degrees (+ / - 5 degrees). Standing is characterized by a trunk-thigh angle of about 180 degrees (+ / - 5 degrees), wherein all of the user's weight supported by the user's legs (e.g., none of the user's body weight is supported by a backrest or leanback). In comparison, in an intermediate posture, at least some of the user's body weight is borne by a back support (namely, a leanback coupled to a chair as described below) or a posterior support attached to the chair, e.g., at a slight recline angle of about 5-15 degrees from vertical (e.g., relative to an axis extending lengthwise through the support column 101). Optionally, the user's trunk-thigh angle is between about 120-180 degrees. Optionally, the user's feet are positioned on an inclined surface with toes elevated about 5-15 degrees from the horizontal ground surface 102. This range of postures includes leaning and perching postures. For example, in one representative intermediate posture, a user's trunk-thigh angle is 180 degrees and the user is leaning back at a slight recline angle with the toes pointed up by about the same recline angle, such that a leanback supports a portion of the user's body weight. In these intermediate postures, the user's body weight is partially supported by their legs and feet, and partially supported by the leanback and / or posterior support. Depending on the recline angle and the optional presence of the posterior support assembly, about 30-95% of the users' body weight is transferred through the legs, while the remaining weight is directly supported by the intermediate posture system (and indirectly bythe chair itself). Aside from the foregoing distinctions, some intermediate postures maintain the spine in a neutral S-curve alignment with the pelvis in a slight forward tilt, distinguishing from both a fully seated position and the fully standing position.

[0036] As used herein, an intermediate posture system is a furniture system comprising a foot platform assembly and a leanback assembly (as described below) that operate in harmony to support a user in intermediate postures between sitting and standing, wherein the system enables users to maintain ergonomic positioning with partial weight distribution between their legs and back support while in a leaning configuration. In some embodiments, the intermediate posture system is configurable between a stowed configuration for normal seated use and an intermediate posture configuration for leaning support.

[0037] The intermediate posture systems generally comprise two main subassemblies that couple to a task seating chair. First, a leanback assembly utilizes the preexisting support structure of the chair seatback and provides slightly-reclined support for the user in intermediate postures, e.g., support regions for both the upper back / shoulders and lumbar area and optionally a posterior support assembly. In some embodiments, the leanback assembly includes a posterior support assembly but not support regions for the upper back or lumbar area. The leanback assembly enables the user to maintain a neutral, well-supported spine posture in the intermediate postures.

[0038] Second, a foot platform assembly provides a stable foundation upon which the user stands in the intermediate posture configuration, i.e., while leaning their back against the leanback. When the user places their body weight upon the foot platform assembly, it anchors the chair in place, creating a secure foundation for supportive leaning against the leanback assembly. The foot platform distributes weight between the legs and the supportive surface, reducing strain on the user's kinetic chain. Used together, the leanback and foot platform create optimal ergonomics.

[0039] In some embodiments, the systems are configurable between a stowed configuration for normal seated use of the chair and an intermediate posture configuration that enables these beneficial intermediate postures. This allows users to easily transition between sitting, standing, and leaning throughout the workday, promoting healthy movement and postural variation.

[0040] As used herein, an intermediate posture adapter (or an intermediate posture kit) is a type of intermediate posture system comprising a foot platform assembly and a leanbackassembly that are couplable or retrofittable to an existing chair to enable the chair to support a user in intermediate postures between sitting and standing. In some embodiments, the adapter is configurable between a stowed configuration and an intermediate posture configuration.

[0041] The intermediate posture systems enable task seating chairs to be configurable into an "intermediate posture configuration" that supports the user in one or more intermediate postures. For example, in this configuration, the user can lean their back against the leanback at a slight recline angle relative to vertical, which advantageously reduces weight borne by the spine, hips, and knees and deactivates certain core muscles as compared to standing. The intermediate posture configurations are identifiable structurally and functionally. Structurally, the intermediate posture configuration is indicated by (1) at least a portion of a leanback surface is positioned gravitationally above the seatback and oriented in a direction opposing the seatback surface (restated, at least a portion of the seatback is disposed between leanback and the foot platform in a vertical direction) (2) the foot platform is positioned to receive a user's feet and a centerline of the foot platform is axially aligned with a centerline of the leanback surface, e.g., about the support column of the chair base, (3) optionally, one or more ground anchors of the foot platform assembly interface with the ground surface to provide stability, and (4) optionally, the leanback surface forms an angle with the ground surface ranging from about 95 to 105 degrees to support a user at a slight recline angle of about 5-15 degrees from vertical.

[0042] The various embodiments described herein provide different mechanisms for deploying and stowing the leanback and foot platform assemblies, different methods of attachment to various chair components, and different support structures to accommodate a range of chair designs while maintaining the core structure and functionality of supporting users in intermediate postures.

[0043] Representative embodiments will now be described.

[0044] FIG. 1A - FIG. IB show a workspace comprising an intermediate posture adapter 100 for a chair 103 according to the present disclosure. The intermediate posture adapter 100 is described herein as a modular intermediate posture adapter for retrofitting and / or reversible attachment to the chair 103. However, in some embodiments, aspects of the intermediate posture adapter 100 may be restated an integral intermediate posture system of the chair 103.

[0045] In particular, FIG. 1 A shows the chair 103 and the intermediate posture adapter 100 in an intermediate posture configuration supporting a user in an intermediate leaning posture at anadjustable height desk 105, whereas FIG. IB shows the chair 103 supporting the user in a sitting posture while the intermediate posture adapter 100 is in a stowed configuration. The intermediate posture adapter 100, chair 103 and adjustable height desk 105 all form part of the workspace.

[0046] The chair 103 shown is a task seating chair gravitationally supported upon a ground surface 102. The chair 103 comprises a seating assembly 106 that includes a seating surface 104, a seatback 107, and a chair base 108. The seating surface 104 is supported by the chair base 108 and provides a surface for supporting a seated user. The seating surface 104 is positioned above the ground surface 102 at a height suitable for seated use.

[0047] The seatback 107 extends upward from a rear portion of the seating surface 104 and provides support for a user's back when in a seated position. The seatback 107 includes a front seatback surface 109 facing toward the seating surface 104 and a rear side 110 facing away from the front seatback surface 109 and the seating surface 104. The seatback 107 may be operably coupled to the seating surface 104, supporting structure thereof, and / or directly to the chair base 108 to provide stable back support for the user while seated.

[0048] The chair base 108 provides stable support for the seating assembly 106 upon the ground surface 102. The chair base 108 includes a support column 101 that establishes a seating height of the seating surface 104 relative to the ground surface 102. The chair base 108 comprises a plurality of legs disposed around the support column 101 to support the weight of the chair 103 and user, with each leg terminating in either a foot or wheel to contact the ground surface 102. The number and shape of legs, feet, and / or wheels may vary between different embodiments of the chair base 108, with the legs being configured to provide stable support in any rotational orientation of the seating assembly 106. The chair base 108 further includes connecting structure that operably couples the chair base 108 to supporting structure of the seating surface 104 and / or the seatback 107, enabling secure attachment and transfer of loads between the seating assembly 106 and the chair base 108. The support column 101 may include height adjustment mechanisms (e.g., a pneumatic cylinder, or screw height adjustment mechanism) to allow the seating surface 104 to be raised or lowered relative to the ground surface 102 to accommodate users of different heights and various working positions.

[0049] The adjustable height desk 105 is positioned adjacent to the chair 103 and includes a worktop that can be adjusted to different heights. The worktop height can be adjusted between a lower position suitable for access by a seated user in the chair 103 and an elevated positionsuitable for access by a user in a standing position. The adjustable height range of the worktop enables users to work at one or more intermediate heights between the seated and standing positions, accommodating a continuum of intermediate postures including leaning and perching positions. This flexibility allows users to maintain proper ergonomic alignment while transitioning between different working positions throughout the day, as the worktop can be positioned to match the user's chosen posture whether sitting, standing, or in an intermediate leaning position supported by the intermediate posture adapter 100. Such adjustability is particularly advantageous when using the chair 103 in its intermediate posture configuration, as it allows the worktop to be positioned at an optimal height for the user's partially-supported standing posture.

[0050] Referring to FIG. 1A - FIG. IB together, aspects of the intermediate posture adapter 100 for use with the chair 103 and adjustable height desk 105 will now be introduced generally, before introducing specific structural features thereof.

[0051] The intermediate posture adapter 100 includes a leanback assembly 111 and a foot platform assembly 112 that may be provided together or independently. When used together with the chair 103, the foot platform assembly 112 and leanback assembly 111 support a user in a range of intermediate postures, as shown in FIG. 1 A.

[0052] Referring to FIG. 1 A, the leanback assembly 111 supports a user in one or more intermediate posture configurations. In particular, the leanback assembly 111 provides a leanback surface that supports the user's back while leaning at a slight recline. The leanback assembly enables the user to maintain a neutral, well-supported spine posture while reducing weight borne by the spine, hips and knees while also deactivating certain core muscles. The leanback assembly includes support regions for both the shoulders and lumbar area to maintain the spine's natural alignment. The leanback surface is distinct from the seatback surface of the chair, as it is oriented in an opposing direction from the seatback surface and supported by a bracket and / or frame of the leanback assembly (see FIG. 2A). The leanback surface may be formed from any combination of materials suitable for task seating, including framed textiles, polymeric materials, cushioning materials, and rigid or semi-rigid support structures. In some embodiments, the leanback surface is a contiguous surface, e.g., a tensioned textile or a molded polymeric surface extending from a lumbar region to a shoulder region. In other embodiments, the leanback surface comprises a plurality of smaller elements that, taken together, form an ergonomic surface that supports the user's back in intermediate postures.

[0053] Leanback assembly 111 is a modular assembly that couples to the seatback 107 to utilize the 107 as a lever arm that provides a restoring force when the user leans against the leanback assembly 1 1 1. The leanback assembly 1 1 1 may be coupled to the chair 103 using various structures. In some embodiments, the leanback assembly 111 couples to the seatback 107 via a bracket 113, e.g., a bracket that couples to a rigid element of the seatback 107 (e.g., a frame of the seatback 107) and extends away from the rear side 110 of the seatback 107. By attaching to the rear side 110, the leanback assembly 111 advantageously leverages unutilized structure of the chair 103 and space behind the seatback 107. In some embodiments, the leanback assembly 111 (e.g., the bracket 113) is coupled to the seatback 107 via at least one clamp 114 and / or at least one fastener, e.g., that clamps a perimeter edge of the seatback 107. In some embodiments, the at least one clamp comprises a plurality of clamps configured to clamp around the perimeter edge of the seatback. In still other embodiments, the leanback assembly 111 is formed integrally with the seatback 107 during manufacturing of the chair 103. The leanback assembly 111 may be configured as a static assembly that remains in the intermediate posture configuration, or may be configurable between the intermediate posture configuration and a stowed configuration in which at least a portion of the leanback assembly 111 stows adjacent to the rear side of the seatback. During transition between configurations, the leanback may rotate relative to the seatback about a hinge (see FIG. 3A - FIG. 3E), slide relative to the seatback along a track (see FIG. 14A - FIG. 14C), fold relative to the seatback (see FIG. 15A - FIG. 15C), collapse and / or roll up relative to the seatback (see FIG. 1A - FIG. IE). In some embodiments, the leanback assembly nests within the foot platform in the stowed configuration.

[0054] Referring still to FIG. 1 A, the modular foot platform assembly 112 operates in harmony with the leanback assembly 111 as part of the intermediate posture adapter 100, as it provides a foot platform 115 upon which a user stands in an intermediate posture with their back leaning against the leanback assembly 111. The foot platform assembly 112 is attachable to the chair. In the intermediate posture configuration, the user's body weight upon the foot platform assembly 112 anchors the chair 103 upon the ground surface 102, providing a secure foundation for supportive leaning. Additionally, the foot platform assembly 112 provides an ergonomic toe angle coordinated with the angle of the leanback assembly 111.

[0055] The foot platform assembly 112 is couplable to the chair 103 using various structures. In some embodiments, the foot platform assembly 112 comprises a chair base receiver (e.g., afoot receiver or wheel receiver) formed as an aperture or recess configured to quickly couple with a foot or a wheel of the chair base 108 (e.g., a caster with a polymeric or rubber wheel). See FIG. 4A - FIG. 4E. In other embodiments, the foot platform assembly 112 couples semipermanently to the chair base 108 via structural elements such as an arm operably coupled to a support column 101, a collar encircling the support column 101, and / or a bracket engaging the chair base 108. See FIG. 3D, FIG. 5A - FIG. 13C. In still other embodiments, the foot platform assembly 112 is formed integrally with the chair base 108 during manufacturing.

[0056] The foot platform assembly 112 may be provided in various configurations. In some embodiments, the foot platform assembly 112 comprises a static foot platform 115 that can be completely removed from the chair 103 and stowed separately when not in use, for example under the adjustable height desk 105. See FIG. 4A - FIG. 4E. In other embodiments, the foot platform assembly 112 is configurable between a stowed configuration and an intermediate posture configuration through various mechanisms. See FIG. 3D, FIG. 5A - FIG. 13C. For example, the foot platform 115 may slide along at least one track during transition between configurations. As another example, the foot platform 115 may comprise a telescoping foot platform having a platform base slidably joined with at least one platform extension. In other examples, the foot platform 115 articulates about an intermediate hinge, wherein the foot platform comprises a platform base and a platform extension disposed in an articulating relationship about the intermediate hinge. In still other examples, the foot platform 115 may fold up or roll up into the stowed configuration, optionally within space between legs of the chair base 108.

[0057] The foot platform assemblies described herein are representative examples of a broader category of foot platform assemblies that may be used in combination with any of the leanback assemblies described herein to provide an intermediate posture system for a chair. The foot platform assemblies may connect to different elements of the chair 103, including the support column 101, seat base, and / or the chair base 108.

[0058] FIG. 1C - FIG. IE show the intermediate posture adapter 100 of FIG. 1A - FIG. IB in greater detail. Particularly, FIG. 1C shows the intermediate posture adapter 100 in the intermediate posture configuration, whereas FIG. ID - FIG. IE show opposing views of the intermediate posture adapter 100 coupled to the chair 103 in an optional stowed configuration.

[0059] Referring to FIG. 1C, the intermediate posture adapter 100 comprises the foot platform assembly 112 and the leanback assembly 111, both being couplable to the seating assembly 106of the chair 103. When coupled to the seating assembly 106, the foot platform assembly 112 and the leanback assembly 111 are configurable into one or more intermediate posture configurations such as shown in FIG. 1C, in which at least a portion of the leanback surface 116 of the leanback assembly 111 is supported gravitationally above and is oriented in an opposing direction from the seating assembly 106, particularly a seatback surface 109 thereof. While the relative positioning and opposition of the leanback surface 116 and the seatback surface 109 are clearly shown in FIG. 1A and FIG. 1C, this relationship is illustrated schematically in FIG. 2A for additional clarity. Referring briefly to FIG. 2A, in the intermediate posture configuration, the leanback surface 203 and the seatback surface 202 or oriented in divergent directions (e.g., oriented in opposing directions relative to a vertical plane 201). Additionally, at least a portion of the leanback surface 203 is positioned gravitationally above the seatback surface 202 to accommodate the expected location of the user's back and lumbar in intermediate postures. Advantageously, this relationship enables a compact footprint and enables the lean angle of the leanback surface 203 to be independently configured from that of the seatback surface 202.

[0060] Referring again to FIG. 1C, in the intermediate posture configuration, a centerline of the foot platform 115 is axially alignable with a centerline of the leanback surface 116 about the support column 101 of the chair base 108 (or an equivalent axis extending longitudinally therethrough) and optionally, at least one ground anchor 117 of the foot platform assembly 112 interfaces with the ground surface 102. In other words, the foot platform assembly 112 and the leanback assembly 111 are alignable such that when a user's feet are supported upon the footing surface 118 when the ground anchors 117 interface with the ground surface 102, the user's back can be supported by the leanback surface 116. Although this alignment is clearly shown in FIG. 1A, the relationship is illustrated schematically in FIG. 2B for additional clarity. Referring briefly to FIG. 2B, centerlines of the foot platform 204 and leanback surface 203 are alignable in a common direction about the support column 206.

[0061] In some embodiments, to facilitate ingress and egress from the intermediate posture adapter 100 in the intermediate posture configuration (particularly when positioned near an adjustable height desk as shown in FIG. 1 A), the foot platform assembly 112 and leanback assembly 111 may be independently rotated about the support column 101. In some embodiments, the relative positions of the foot platform assembly 112 and leanback assembly111 about the support column 101 may be permanently or selectively fixed, e.g., by structures described herein with respect to FIG. 20A - FIG. 20C.

[0062] Returning to FIG. 1C, leanback assembly 111 includes means for supporting a user's back and optionally user's posterior in the intermediate posture configuration and means for coupling to the chair 103, e.g., means for coupling to the seatback 107.

[0063] The leanback assembly 111 supports a user's back via the leanback surface 116, which is designed to support a user's back at a slight recline angle of about 5-15 degrees from vertical when leaned against by the user. Restated, in the intermediate posture configuration, the leanback surface 116 forms an angle with the ground surface 102 ranging from about 95 to 105 degrees. Leanback surface 116 support regions for both the shoulders and lumbar area via a shoulder surface 119 and lumbar surface 120, respectively.

[0064] The leanback assembly 111 couples to the chair 103, e.g., the seatback 107. When a user leans against the leanback assembly 111, the user's body weight causes the leanback surface 116 to deflect toward the seating assembly 106 against a restoring force exerted by the seatback 107.

[0065] In the representative embodiment of FIG. 1A - FIG. IE, the leanback assembly 111 comprises a leanback 121; here, leanback 121 includes a frame 122 and leanback surface 116 (here, a framed textile 123). The frame 122 tensions the framed textile 123, e.g., a breathable mesh forming the leanback surface 116. The frame 122 includes a plurality of frame members 124 that are optionally collapsible or retractable, as shown (telescoping frame members). Advantageously, embodiments in which the frame is collapsible enable compact stowage of the leanback 121 in the optional stowed configuration. Nevertheless, in some embodiments, the frame 122 is not collapsible or retractable, and in some embodiments is formed of a molded polymer and / or metallic frame elements. As stated above, the leanback surface 116 is not limited to textiles or even framed materials; in some embodiments, the leanback surface 116 is a rigid molded polymeric surface.

[0066] The frame 122 of the leanback assembly 111 is couplable to the chair 103 via a bracket 113 and optional attachment means, including one or more clamps 114 and / or fasteners. In some embodiments, the bracket 113 is couplable to the seatback 107, e.g., a rear side 110, perimeter, and / or edge thereof. For example, in the embodiment shown, the bracket 113 includes a plurality of clamps 1 14 that clamp and edge of the seatback 107. In some embodiments, the bracket 113 extends away from the rear side 110 of the seatback 107. Insome embodiments, the bracket 113 couples to the seatback 107 via friction fit or snap fit, e.g., without a clamp of fastener. In some embodiments, the bracket 113 slides over a top of the seatback 107 in a sleeved relationship.

[0067] The leanback assembly 111 optionally includes a posterior support assembly 125 configured to support a user's posterior in the intermediate posture configuration. The posterior support assembly 125 includes a cushioned drum or shelf extending away from the leanback surface 116 at a position gravitationally below a lumbar surface 120 thereof. In some embodiments, the posterior support assembly 125 is operably coupled to the bracket 113. In other embodiments, the posterior support assembly 125 is operably coupled directly to the seatback 107. In the illustrated embodiment, the cushioned drum is cylindrical; however, in some embodiments, the drum may have an elliptical shape that enables rotational adjustment of its position and support. Advantageously, the posterior support assembly 125 bears a portion of the user's body weight in different intermediate postures (e.g., perching postures) to reduce fatigue. In some embodiments, the leanback assembly 111 include the posterior support assembly 125 but not the leanback 121.

[0068] In the embodiment shown, the leanback surface 116 and posterior support assembly 125 are integral in that the framed textile 123 spools around the drum. The drum is rotationally biased about its longitudinal axis (e.g., by an internal spring) such that when the frame 122 is collapsed for stowage, the drum neatly rolls up the framed textile 123. In some embodiments, in the intermediate posture configuration, the posterior support assembly 125 and shoulder surface 119 are disposed on opposite sides of a fulcrum 126 such that when a user leans against the leanback surface 116, it urges the posterior support assembly 125 toward the user, increasing support.

[0069] Still referring to FIG. 1C, the foot platform assembly 112 provides a secure foundation upon which the user's feet rest in the intermediate postures. In particular, the foot platform assembly 112 includes the foot platform 115 and one or more ground anchors 117 that interface with the ground surface 102 in the intermediate posture configuration.

[0070] To prevent the chair 103 from rolling away from the user in the intermediate postures, the foot platform assembly 112 is attachable to the chair 103. This can be achieved utilizing a multitude of different structures. For example, in the embodiment shown, the foot platform assembly 112 is operably couplable to a foot ring of the chair base 108 via an arm 127. In other embodiments, the arm 127 is couplable to other aspects of the seating assembly 106, e.g.,the support column 101 or the seatback 107. Advantageously, such an arm 127 or other connecting structure between the foot platform 115 and the chair 103 enables selective stowage of the foot platform 115, e.g., tilting up about a hinge.

[0071] Still other embodiments of the foot platform assembly, such as described in FIG. 4A - FIG. 4E, do not have an arm 127 or other extraneous connecting structure, but are designed to separate from the chair 103 when not in use, e.g., for stowage under the adjustable height desk 105. For example, in some embodiments, the foot platform assembly 112 attaches directly to a foot, wheel and / or leg of the chair base 108, e.g., via a receiver formed as an aperture or recess.

[0072] The foot platform 115 and one or more ground anchors 117 are designed such that, in the intermediate posture configuration, a toe end of the foot platform 115 is inclined by about 5-15 degrees from the horizontal ground surface 102 to support the user in an optimal intermediate posture.

[0073] Turning to FIG. ID, the one or more ground anchors 117 extend from a bottom (ground) side of the foot platform 115. In some embodiments, one or more of the ground anchors 117 is formed using a cushioning and resilient soft polymeric material such as a high density foam (e.g., a polyvinyl chloride or polyurethane). Beneficially, this enables the foot platform 115 to reduce user fatigue. In other embodiments, one or more of the ground anchors 117 are formed integrally with the foot platform 115, e.g., of an integrally molded polymer. The number of ground anchors 117 varies between one to multiple (e.g., two, three, or more).

[0074] The incline of the foot platform 115 in the intermediate posture configuration is influenced by the one or more ground anchors 117 extending away from a bottom (ground) side of the foot platform 115, and / or by the geometry of the foot platform 115 itself. For example, a ground anchor at a toe end of the foot platform 115 has a greater diameter than a ground anchor at an intermediate location or heel location of the foot platform 115. In FIG. ID, the three ground anchors 117 have graduated diameters, i.e., the ground anchor 117 at the toe end of the foot platform 115 has the largest diameter of the three. Accordingly, the one or more ground anchors 117 are sized and placed such that the foot platform 115 creates an inclined surface of 5-15 degrees when the ground anchors 117 interface with the ground surface 102 in the intermediate posture configuration.

[0075] Accordingly, the leanback assembly 111 and foot platform assembly 112 work together as an intermediate posture adapter 100 to enable ergonomic intermediate postures. The leanback assembly 111 provides slightly reclined support for the user's back at an angle ofabout 5-15 degrees from vertical, enabling the user to maintain a neutral, well-supported spine posture. The leanback surface includes support regions for both the shoulders and lumbar area to maintain the spine's natural S-curve alignment. Meanwhile, the foot platform assembly 112 provides a stable foundation, with the user's body weight upon the foot platform assembly 112 anchoring the chair 103 in place upon the ground surface 102 to create a secure foundation for supportive leaning against the leanback assembly 111. The foot platform helps distribute weight between the legs and the supportive surface, with about 30-95% of the user's body weight transferred through their legs while the remaining weight is directly supported by the intermediate posture system. The slight incline of the foot platform (about 5-15 degrees from horizontal) works in concert with the recline angle of the leanback to maintain optimal biomechanical alignment. Together, these assemblies enable users to comfortably maintain intermediate postures that provide ergonomic benefits compared to prolonged sitting or standing.

[0076] Some intermediate posture systems of the present disclosure are configurable between an intermediate posture configuration and a stowed configuration that promotes space efficiency when the user is not utilizing the intermediate posture adapter 100 to support an intermediate posture. In some embodiments, the foot platform assembly 112 and leanback assembly 111 remain attached to the chair 103 in the stowed configuration; in such embodiments, the stowed configuration is characterized by at least a portion of the leanback surface and optionally at least a portion of the foot platform 115 stowing adjacent to the seating assembly 106. In some embodiments, at least a portion of one or both of the foot platform assembly 112 or leanback assembly 111 decouple from the chair 103 in the stowed configuration; in such configurations, the decoupled elements may be stowed on the chair 103, under the adjustable height desk 105, or in another convenient location.

[0077] In the embodiment illustrated in FIG. ID - FIG. IE, in the stowed configuration, at least a portion of the leanback surface 116 and at least a portion of the foot platform 115 stows adjacent to the rear side 110 of the seatback 107. In this embodiment, the frame 122 collapses and the framed textile 123 stows around the drum that doubles as the posterior support assembly 125. Additionally, the foot platform 115 folds upward about the hinge 128 and is secured adjacent to the rear side 110 of the seatback 107. Thus, stowable embodiments of the intermediate posture adapter 100 enable space-efficient storage when not in use.

[0078] FIG. 2A schematically illustrates a side elevation view of aspects of a chair 207 provided with an intermediate posture adapter 200 in the intermediate posture configuration. The chair 207 is provided with a seating surface 205 and a seatback surface 202 supported upon a chair 207. As shown, in the intermediate posture configuration, the leanback surface 203 and the seatback surface 202 are oriented in divergent directions (e.g., opposite sides of a vertical plane 201). Additionally, at least a portion of the leanback surface 203 is positioned gravitationally above the seatback surface 202 to accommodate the expected location of the user's back and posterior in intermediate postures. As shown, at least a portion of the seatback surface 202 is disposed between the leanback surface 203 and the foot platform 301.

[0079] FIG. 2B schematically illustrates a top plan view of aspects of the chair 207, showing that the foot platform 204 and leanback surface 203 are alignable in a common direction about the support column 206 (see arrow representing a centerline of both the leanback surface 203 and foot platform 204). Restated, a centerline of the leanback surface 203 can be oriented in a same direction as a centerline of the foot platform 204. In some embodiments, to facilitate ingress and egress from the intermediate posture adapter 200 in the intermediate posture configuration, the foot platform 204 and leanback surface 203 may be independently rotated about the support column 206. In some embodiments, the relative positions of the foot platform 204 and leanback surface 203 about the support column 206 may be permanently or selecting fixed, e.g., by foot platform alignment assemblies described herein with respect to FIG. 20A - FIG. 20C.

[0080] Having described the function and structure of the intermediate posture systems in the context of a representative embodiment, variations will now be described.

[0081] FIG. 3A - FIG. 3E show a chair 302 provided with an intermediate posture adapter 300 according to another embodiment of the present disclosure. Intermediate posture adapter 300 is operably coupled to the seating assembly of the chair 302 and movable between a stowed configuration (FIG. 3B) and an intermediate posture configuration (FIG. 3A, FIG. 3C). The intermediate posture system comprises a foot platform assembly comprising a foot platform, and a leanback assembly comprising a leanback.

[0082] The intermediate posture adapter 300 differs from the intermediate posture adapter 100 described previously in that the leanback 303 is rotationally coupled to the seatback 304 via a hinged bracket 305 that is also a posterior support assembly.

[0083] Because the leanback 303 is hingedly coupled to the seatback 304, during a transition between the stowed configuration and the intermediate posture configuration, the leanback 303 rotates relative to the seatback 304. In the stowed configuration shown in FIG. 3B, the leanback surface 306 is oriented toward the seating assembly, whereas in the intermediate posture configuration shown in FIG. 3A, the leanback surface 306 is oriented away from the seating assembly. In the stowed configuration, the leanback 303 nests within the foot platform assembly.

[0084] FIG. 3D shows a representative foot platform assembly of the intermediate posture adapter 300 comprising a foot platform assembly 307 and structure for connecting a foot platform 301 thereof to the seating assembly of the chair 302; in this embodiment, an arm 308 and a collar 309 that couples to the support column of the chair 302. A hinge 310 connecting the foot platform 301 and arm 308 enables the foot platform assembly 307 to be configurable between a stowed configuration (shown) and an intermediate posture configuration (see FIG. 3A).

[0085] FIG. 3E shows a representative leanback assembly 311 comprising a leanback 303 and structure for connecting the leanback assembly 311 to the chair 302; in this embodiment, a bracket 305 for coupling to the seatback 304. As shown, the leanback 303 includes a frame 312 that tensions a leanback surface 313 for supporting the user. The bracket 305 is a molded polymer bracket design to couple to the rear side of the seatback 304 of a particular chair (in particular, around a perimeter of the seatback 304). Accordingly, in some embodiments, only the bracket 305 needs to be updated to adapt the intermediate posture adapter 300 to different chairs.

[0086] The leanback assembly 311 includes a posterior support assembly 314 formed as a cylindrical cushion, and which hingedly couples the leanback 303 to the bracket 305. Accordingly, the leanback assembly is configurable between a stowed configuration (see FIG. 3E) and an intermediate posture configuration (see FIG. 3A). In the stowed configuration, the leanback surface 306 faces the rear side of the seatback 304.

[0087] FIG. 4A - FIG. 4E show another foot platform assembly 400 according to an embodiment of the present disclosure, that is designed to completely separate from the chair base 402, e.g., for stowage beneath a desk. In some embodiments, the foot platform assembly 400 is attachable to the desk, e.g., via an arm the couples the foot platform assembly 400 to the desk to facilitate localizing and / or stowage of the foot platform assembly.

[0088] As shown in FIG. 4A and FIG. 4D, the foot platform assembly 400 has a foot platform 404 comprising a receiver 406 (e.g., a foot receiver and / or wheel receiver) formed therein as an aperture or recess in the foot platform 404 (bounded by the dashed box in FIG. 4A). The receiver 406 is designed to receive a portion of the chair base 402 therein. For example, in FIG. 4A - FIG. 4C, the receiver 406 is an aperture sized to receive a foot or wheel of the chair base 402 therein and to limit movement of the same. In other words, the receiver 406 is a chock for the wheel or foot received therein.

[0089] The foot platform assembly 400 further comprises an engagement member 408 configured to secure the chair base 402 to the foot platform assembly 400 when the portion of the chair base 402 (e.g., the wheel) is received within the receiver 406. As shown in FIG. 4B and FIG. 4C, in the illustrated embodiment, the engagement member 408 comprises a strap that fastens over a leg of the chair base 402 (e.g., with hook-and-loop fasteners) when the wheel is received within the receiver 406. In other embodiments, the engagement member 408 comprises a clamp that secures around a foot, wheel and / or leg of the chair base 402 or at least one arm operably couplable to a support cylinder or the leg of the chair base 402.

[0090] In use, the user inserts a wheel of the chair base 402 into the receiver 406 and fastens the chair base 402 to the foot platform assembly 400 using the engagement member 408. In some embodiments, a footing surface of the foot platform 404 forms an interior angle with the ground surface of about 5 to 15 degrees when a wheel of the chair base 402 is received within the receiver 406.

[0091] FIG. 5A - FIG. 5D show another foot platform assembly 500 according to the present disclosure, i.e., a sliding foot platform assembly comprising at least one track, wherein the foot platform slides along the at least one track. Sliding foot platforms may include aspects of other foot platforms described herein, including telescoping features, intermediate hinges, and / or rolling / folding features. The foot platform assembly couples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0092] FIG. 6A - FIG. 6D show another foot platform assembly 600 according to the present disclosure, wherein the foot platform comprises a telescoping foot platform. Telescoping foot platforms may include aspects of other foot platforms described herein, including sliding features, intermediate hinges, and / or rolling / folding features. The foot platform assemblycouples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0093] FIG. 7A - FIG. 7D show another foot platform assembly 700 according to the present disclosure, wherein the foot platform articulates about an intermediate hinge. Such foot platforms may include aspects of other foot platforms described herein, including sliding features, telescoping features, and / or rolling / folding features. The foot platform assembly couples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0094] FIG. 8A - FIG. 8C show another foot platform assembly 800 according to the present disclosure, wherein the foot platform folds up or rolls up into the stowed configuration. Such foot platforms may include aspects of other foot platforms described herein, including sliding features, telescoping features, and / or intermediate hinge features. The foot platform assembly couples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0095] FIG. 9A - FIG. 9C show another foot platform assembly 900 according to the present disclosure, wherein the foot platform folds up or rolls up into the stowed configuration within space between legs of the chair base. Such foot platforms may include aspects of other foot platforms described herein, including sliding features, telescoping features, intermediate hinges, and / or rollup / foldup features. The foot platform assembly couples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0096] FIG. 10A - FIG. 10C show a foot platform assembly 1000 according to the present disclosure. In any embodiment, the foot platform may have any number of anchor points, e.g., one, two, three, or more. The foot platform assembly couples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0097] FIG. 11A - FIG. 1 IB show a foot platform assembly 1100 according to the present disclosure with a single ground anchor. The foot platform assembly couples to the chair base, e.g., a support column and / or legs, and can be utilized in connection with any leanback assembly described herein.

[0098] The foot platform assemblies described herein may connect or be configured to connect to different elements of the chair, including the support column assembly.Additionally or alternatively, any foot platform assembly may be configured to connect to other structure of the seating assembly, including a seat base as shown in the foot platform assembly 1200 FIG. 12A - FIG. 12C and / or the chair base as shown in the foot platform assembly 1300 of FIG. 13A - FIG. 13C.

[0099] Some embodiments of chairs and intermediate posture systems of the present disclosure are provided with a leanback assembly configurable between the intermediate posture configuration and a stowed configuration. In the stowed configuration, at least a portion of the leanback is stowed adjacent to the seating assembly, and in particular adjacent to the seatback. In the intermediate posture configuration, a leanback surface of the leanback (the surface that receives the user's back when standing and leaning) and the seatback surface of the seatback (the surface that receives the user's back when sitting) face divergent directions.

[0100] In FIG. 3A - FIG. 3E, the leanback is hingedly coupled to the seatback via a hinge of the leanback assembly, wherein during a transition between the stowed configuration and the intermediate posture configuration, the leanback rotates relative to the seatback. In some such embodiments, in the stowed configuration, the leanback surface is oriented toward the seating assembly, wherein in the intermediate posture configuration, the leanback surface is oriented away from the seating assembly.

[0101] FIG. 14A - FIG. 14C show another representative leanback assembly 1400 according to the present disclosure, in which the leanback is slidably disposed along a track of the leanback assembly, such that the leanback translates along the track when reconfigured between the stowed configuration and the intermediate posture configuration. In the stowed configuration and the intermediate posture configuration, a leanback surface of the leanback is oriented away from the seating assembly, i.e., the leanback surface and the seatback face divergent directions.

[0102] FIG. 15A - FIG. 15C show an alternative leanback assembly and foot platform assembly of an intermediate posture system 1500 in which the leanback and foot platform fold or roll into the stowed configuration and unfold or unroll into the intermediate posture configuration.

[0103] In some embodiments, the chair or intermediate posture systems are provided with a posterior support assembly, either with or without a leanback or as part of a leanback assembly. The posterior support assembly is configured to support a user's posterior in the intermediate posture configuration, e.g., when the user is in a perch posture (FIG. 16C).

[0104] FIG. 16A - FIG. 16C show a representative posterior support assembly 1600 comprising a posterior cushion extending from a rear side of the seatback, e.g., via a frame or bracket of the leanback assembly. The posterior cushion shown can be utilized in connection with any leanback assembly of the present disclosure. As shown, the posterior support assembly 1600 is utilized with a foot platform assembly but without a leanback.

[0105] FIG. 17A - FIG. 17C show another representative posterior support assembly 1700, further comprising a head cushion, e.g., connected to the frame or bracket. As shown, the posterior support assembly 1700 is utilized with a foot platform assembly but without a leanback.

[0106] Any leanback assembly described herein can be provided with one or more armrests, as shown in the leanback assembly 1800 of FIG. 18A - FIG. 18B. Said armrests deploy in the standing intermediate posture configuration and stow in the stowed configuration.

[0107] Any chair or intermediate posture system may include a foot platform alignment assembly to ensure the foot platform and the seating assembly are aligned (e.g., about the support column) such that the foot platform assembly is aligned with the posterior support assembly and / or leanback assembly in the intermediate posture configuration. Such foot platform alignment assemblies generally connect the foot platform assembly to the seating assembly, posterior support assembly, and / or leanback assembly to ensure a fixed (or selectively fixed) relative orientation about the vertical axis of the support column (e.g., about a support column).

[0108] FIG. 19A - FIG. 19C show a representative foot platform alignment assembly 1900 comprising an articulating support member, wherein a lower member couples to the foot platform assembly and an upper member couples to the seating assembly, the posterior support assembly, and / or the leanback assembly. The two members articulate relative to each other in response to extension or compression of the support column, i.e., when the chair height changes.

[0109] FIG. 20A - FIG. 20C show another representative foot platform alignment assembly 2000 comprising a telescoping device, wherein a lower member couples to the foot platform assembly and an upper member couples to the seating assembly, the posterior support assembly, and / or the leanback assembly. The two members extend and retract relative to each other in response to extension or compression of the support column, i .e., when the chair height changes.

[0110] Advantageously, the present disclosure provides intermediate posture systems, e.g., intermediate posture adapters / kits, chairs provided with the same, as well as leanback assemblies and foot platform assemblies. Additionally, the present disclosure includes product lines comprising a plurality of different intermediate posture systems, wherein each different intermediate posture system comprises a leanback assembly and / or a foot platform assembly as described herein. In another aspect, the present disclosure provides workspaces comprising an intermediate posture system and one or both of a chair and a desk (e.g., an adjustable height desk).[OHl] For the avoidance of doubt, the following combinations of features are expressly described herein, any one of which may be claimed.Table 1: Intermediate Posture Adapter Feature CombinationsTable 2: Chair Feature Combinations

[0112] Various changes can be made to the embodiments of the present disclosure as could be reasonably contemplated in view of the above-described description by any person skilled in the art. The following claims are presented as examples of embodiments of the present disclosure, but these claims should not be construed to limit other claims or other embodiments disclosed herein.

[0113] The detailed description set forth above in connection with the appended drawings, where like numerals reference like elements, are intended as a description of representative embodiments of the present disclosure and are not intended to represent the only embodiments. Each embodiment described in this disclosure is provided as an example or illustration and should not be construed as preferred or advantageous over other embodiments. The illustrativeembodiments provided herein are not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Similarly, any steps described herein may be interchangeable with other steps, or combinations of steps, to achieve the same or substantially similar result. Further still, one or more features of any embodiment may be combined with one or more features of one or more embodiments to form additional embodiments, which are within the scope of the present disclosure.

[0114] Generally, the embodiments disclosed herein are non-limiting, and the inventors contemplate that other embodiments within the scope of this disclosure may include structures and functionalities from more than one specific embodiment shown in the FIGURES and described in the specification. It will be appreciated that variations and changes may be made by others, and equivalents employed, without departing from the spirit of the present disclosure. Accordingly, it is expressly intended that all such variations, changes, and equivalents fall within the spirit and scope of the present disclosure as claimed. For example, the present disclosure includes additional embodiments having combinations of any one or more features described above with respect to the representative embodiments.

[0115] In the foregoing description, specific details are set forth to provide a thorough understanding of representative embodiments of the present disclosure. It will be apparent to one skilled in the art, however, that the embodiments disclosed herein may be practiced without embodying all the specific details. In some instances, well-known process steps have not been described in detail in order not to unnecessarily obscure various aspects of the present disclosure.

[0116] The present application may include references to directions, such as “first,” "second," "vertical," "horizontal," "front," "rear," "left," "right," "top," and "bottom," “above,” “below,” “around,” etc. These references, and other similar references in the present application, are intended to assist in helping describe and understand the particular embodiment (such as when the embodiment is positioned for use) and are not intended to limit the present disclosure to these directions or locations.

[0117] The present application may also reference quantities and numbers. Unless specifically stated, such quantities and numbers are not to be considered restrictive, but exemplary of the possible quantities or numbers associated with the present application. Also in this regard, the present application may use the term "plurality" to reference a quantity or number. In this regard, the term "plurality" means any number that is more than one, for example, two, three, four, five, etc. The term "about," "about," etc., means plus or minus 5% of the stated value. Theterm "based upon" means "based at least partially upon." The term "between" includes the values recited in connection therewith. The expressions “at least one of A, B, or C"; “at least one of A, B, and C"; and “at least one of A, B, and / or C" have the same meaning, i.e., any one of the following conditions satisfy all of the foregoing expressions: A; B; C; AB; AC; BC;ABC.

Claims

CLAIMSWhat is claimed is:

1. An intermediate posture adapter for a chair, the chair comprising a seatback and a seating surface supported upon a chair base, the intermediate posture adapter comprising: a foot platform assembly couplable to the chair base and comprising a foot platform; and a leanback assembly couplable to the seatback via a bracket and comprising a leanback forming a leanback surface, wherein, when coupled to the chair, the foot platform assembly and the leanback assembly are configurable into an intermediate posture configuration in which: the seatback supports at least a portion of the leanback surface above the seatback in an orientation opposing the seatback, and wherein a centerline the foot platform is alignable with a centerline of the leanback surface.

2. The intermediate posture adapter of claim 1, wherein the leanback assembly further comprises a collapsible frame supporting the leanback surface, wherein the leanback surface is retractable.

3. The intermediate posture adapter of claim 1, wherein the leanback rotates relative to the seatback and the seating surface about a hinge of the leanback assembly and / or translates relative to the seatback and the seating surface along at least one track of the leanback assembly.

4. The intermediate posture adapter of claim 1, wherein the bracket is couplable to the seatback via at least one clamp and / or at least one fastener.

5. The intermediate posture adapter of claim 4, wherein the at least one clamp is configured to clamp a perimeter edge of the seatback.

6. The intermediate posture adapter of claim 1, wherein the bracket extends away from a rear side of the seatback.

7. The intermediate posture adapter of claim 1, wherein the foot platform assembly and the leanback assembly are configurable between the intermediate posture configuration and astowed configuration in which at least a portion of the leanback surface stows adjacent to a rear side of the seatback.

8. The intermediate posture adapter of claim 7, wherein during a transition between the stowed configuration and the intermediate posture configuration, the leanback rotates relative to the seatback about a hinge, slides relative to the seatback along a track, folds relative to the seatback, and / or collapses.

9. The intermediate posture adapter of claim 8, wherein during the transition between the stowed configuration and the intermediate posture configuration, the leanback surface folds, rolls, retracts, and / or collapses.

10. The intermediate posture adapter of claim 1, wherein the leanback assembly further comprises a posterior support assembly.

11. The intermediate posture adapter of claim 10, wherein in the intermediate posture configuration, the posterior support assembly and a shoulder surface of the leanback surface are operably coupled on opposite sides of a fulcrum of the bracket.

12. The intermediate posture adapter of claim 1, wherein the foot platform comprises a wheel receiver formed as an aperture or recess therein.

13. The intermediate posture adapter of claim 12, wherein the foot platform assembly further comprises an engagement member configured to secure the chair base to the foot platform assembly when a wheel of the chair base is received within the wheel receiver.

14. The intermediate posture adapter of claim 1, wherein the foot platform assembly and the leanback assembly are configurable between the intermediate posture configuration and a stowed configuration in which at least a portion of the leanback surface stows adjacent to a rear side of the seatback and in which the foot platform assembly decouples from the chair base.

15. A chair, comprising: a seating assembly comprising a seatback and a seating surface supported upon a chair base; a foot platform assembly couplable to the chair base and comprising a foot platform; anda leanback assembly couplable to the seatback via a bracket and comprising a leanback forming a leanback surface, wherein the foot platform assembly and the leanback assembly are configurable into an intermediate posture configuration in which: the seatback supports at least a portion of the leanback surface above the seatback in an orientation opposing the seatback, and wherein a centerline of the foot platform is alignable with a centerline of the leanback surface.

16. The chair of claim 15, wherein the leanback assembly further comprises a retractable frame supporting the leanback, wherein the leanback surface is retractable.

17. The chair of claim 15, wherein the foot platform assembly and the leanback assembly are configurable between the intermediate posture configuration and a stowed configuration in which at least a portion of the leanback surface stows adjacent to a rear side of the seatback.

18. The chair of claim 17, wherein during a transition between the stowed configuration and the intermediate posture configuration, the leanback rotates relative to the seatback about a hinge of the leanback assembly, slides relative to the seatback along a track of the leanback assembly, folds relative to the seatback, and / or collapses relative to the seatback.

19. The chair of claim 18, wherein the foot platform comprises a wheel receiver formed as an aperture or recess therein, wherein the foot platform assembly further comprises an engagement member configured to secure the chair base to the foot platform assembly when a wheel of the chair base is received within the wheel receiver.

20. The chair of claim 15, wherein the bracket extends away from a rear side of the seatback.

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