In recent years, there has been a trend in the furniture design industry to improve the mobility of furniture for use in multi-functional, temporary use, or flex spaces. For example, in the context of rental apartment furniture designs, there has been a trend of converting a stationary kitchen island to a movable kitchen island table in new apartment developments. One reason for this is to provide better flexibility within the dwelling unit for alternative uses of the kitchen island, such as using the island as a food preparation table, a dining table, a desk, an entertaining bar, a crafts table, or various other uses. Given this trend, there continues to be a need to develop furniture with better mobility so that the furniture can be more easily moved throughout the dwelling to serve multiple different functions.
Disclosed herein is new technology for providing improved mobility to an article of furniture.
In one aspect, the disclosed technology may take the form of a system comprising: (i) a plurality of furniture caster assemblies, each furniture caster assembly of the plurality of furniture caster assemblies respectively comprising (a) a housing comprising one or more side walls defining an interior space of the housing, wherein the housing is configured to mechanically couple to a respective furniture leg of an article of furniture comprising a plurality of legs, (b) a furniture caster comprising at least one rolling component, wherein the furniture caster is positioned at least partially within the interior space of the housing and movable between an extended position in which the at least one rolling component at least partially extends outside of the interior space of the housing and a retracted position in which the furniture caster is retracted further into the interior space of the housing relative to the extended position, and (c) a push-pull cable mechanically coupled to the furniture caster; and (ii) at least one actuator mechanically coupled to the push-pull cables, wherein the actuator is configured to (a) when actuated, apply a pushing force to the push-pull cables, thereby causing the furniture casters to transition from the retracted position to the extended position and (b) when not actuated, remove the applied pushing force from the push-pull cables, thereby causing the furniture casters to transition from the extended position to the retracted position.
In another aspect, the disclosed technology may take the form of an article of furniture comprising: (i) a plurality of furniture legs each comprising a respective bottom surface configured to interface with a floor or ground surface; (ii) a plurality of furniture caster assemblies, each furniture caster assembly of the plurality of furniture caster assemblies respectively comprising (a) a housing comprising one or more side walls defining an interior space of the housing, wherein the housing is mechanically coupled to a respective furniture leg of the plurality of legs, (b) a furniture caster comprising at least one rolling component, wherein the furniture caster is positioned at least partially within the interior space of the housing and movable between an extended position in which the at least one rolling component at least partially extends below the respective bottom surface of the respective furniture leg and a retracted position in which the at least one rolling component is positioned entirely above the respective bottom surface of the respective furniture leg, and (c) a push-pull cable mechanically coupled to the furniture caster; and (iii) at least one actuator mechanically coupled to the push-pull cables, wherein the actuator is configured to (a) when actuated, apply a pushing force to the push-pull cables, thereby causing the furniture casters to transition from the retracted position to the extended position and (b) when not actuated, remove the applied pushing force from the push-pull cables, thereby causing the furniture casters to transition from the extended position to the retracted position.
One of ordinary skill in the art will appreciate these as well as numerous other aspects in reading the following disclosure.
Features, aspects, and advantages of the presently disclosed technology may be better understood with regard to the following description, appended claims, and accompanying drawings, as listed below. A person skilled in the relevant art will understand that the features shown in the drawings are for purposes of illustrations, and variations, including different and/or additional features and arrangements thereof, are possible.
The drawings are for the purpose of illustrating example embodiments, but those of ordinary skill in the art will understand that the technology disclosed herein is not limited to the arrangements and/or instrumentality shown in the drawings.
As noted above, disclosed herein is new technology for providing improved mobility to an article of furniture. Existing techniques for improving the mobility of furniture may involve affixing a set of casters to the legs of the furniture. However, this technique may negatively impact the design aesthetic of the furniture. For instance, some consumers may find the visual appearance of casters to be unappealing. To help address these or other issues, the technology disclosed herein is directed toward a retractable furniture caster system that allows the casters to transition to an extended position for rolling on the ground when it is desirable to move the furniture to a new location, and allows the casters to transition to a retracted position when it is no longer desirable to move the furniture. While in the retracted position, the casters may be out of sight so that they do not affect the design aesthetic of the furniture.
The following disclosure makes reference to the accompanying figures and several example embodiments. One of ordinary skill in the art should understand that such references are for the purpose of explanation only and are therefore not meant to be limiting. Part or all of the disclosed systems, devices, and methods may be rearranged, combined, added to, and/or removed in a variety of manners, each of which is contemplated herein.
Turning now to the figures,
As shown, the retractable furniture caster system 100 includes a number of caster assemblies 102 including caster assembly 102a, caster assembly 102b, caster assembly 102c, and caster assembly 102d. While
Each caster assembly 102 includes a housing 104, a caster 106, and a push-pull cable 108. For instance, caster assembly 102a includes housing 104a, caster 106a, and push-pull cable 108a. Caster assembly 102b includes housing 104b, caster 106b, and push-pull cable 108b. Caster assembly 102c includes housing 104c, caster 106c, and push-pull cable 108c. And caster assembly 102d includes housing 104d, caster 106d, and push-pull cable 108d. As explained in further detail below in connection with
As further shown in
Turning now to
As noted above, the caster assembly 102 includes a housing 104, and the caster 106 is movably positioned within the housing. To facilitate this, the housing 104 may include one or more sidewalls 208 that define an interior space 210 of the housing 104. The interior space 210 may be large enough to contain the caster 106, and the caster 106 may be movable within the interior space 210. For instance, the caster 106 may be unsecured to the housing 104 and may be capable of moving vertically within the interior space 210.
As further noted above, the caster 106 may move within the housing 104 due to the push-pull cable 108 exerting a force on the caster 106. For instance, the push-pull cable 108 may include an outer conduit 109 and a cable 111 housed within the conduit 109. The actuator 112, when actuated, may exert a pushing force on the cable 111, pushing the cable 111 through the conduit 109. The cable 111 may be mechanically coupled to the caster 106 such that, when the actuator 112 exerts the pushing force on the cable 111, the cable 111 transfers the pushing force to the caster 106. To facilitate this, one end of the housing 104 may include a cable receiving block 212. The conduit 109 may be fixed to the cable receiving block 212 (e.g., via a fitting of the push-pull cable 108 or the like), while the cable 111 may pass through an opening 214 in the cable receiving block 212 and mechanically couple to the caster 106. While the entire length of the push-pull cable 108 is not shown in
As shown in
As further noted above, each of the caster assemblies 102 may be configured to mechanically couple to a respective leg of the article of furniture. This coupling may be achieved in various ways. In some examples, the caster assemblies 102 may be configured to be inserted inside the furniture legs. For example, as shown in
Turning now to
In order to mechanically couple the actuator 112 to the push-pull cables 108, the actuator assembly 110 may include a cable push block 402. The push block 402 includes a fixed portion 404 and a slidable portion 406. The fixed portion 404 may be immovably affixed to the article of furniture, for example to an underside of the furniture, and the slidable portion 406 may be movably coupled to the fixed portion 404 and configured to slide along a single axis relative to the fixed portion 404. The outer conduit 109 of the push-pull cables 108 may be affixed to the slidable portion 406 of the cable push block 402, for instance, via fittings 408 of the push-pull cables 108. The inner cables 111 of the push-pull cables 108 may extend through the fittings 408 and be affixed to the fixed portion 404 of the push block 402 at respective terminals 410. The terminals 410 may be separated from the fittings 408 by one or more springs 412.
In operation, the actuator 112 may be configured to pull the slidable portion 406 of the push block 402 such that the fittings 408 are pulled toward the terminals 410. This pulling motion on the fittings 408 (and consequently on the outer conduit portions 109 of the push-pull cables 108) effects a pushing force on the inner cables 111 of the push-pull cables 108. And because the opposite ends of the inner cables 111 are coupled to the casters 106 of the caster assemblies 102, this pushing force is transferred to the casters 106, thereby causing the casters 106 to transition from a retracted position to an extended position as described above. Conversely, when the actuator 112 is released or otherwise no longer actuated, the springs 412 push the slidable portion 406 and the fittings 408 back to their previous position. This pushing motion on the fittings 408 (and consequently on the outer conduit portions 409 of the push-pull cables 108) effects a pulling force on the inner cables 111 of the push-pull cables 108. Likewise, because the opposite ends of the inner cables 111 are coupled to the casters 106 of the caster assemblies 102, this pulling force is transferred to the casters 106, thereby causing the casters 106 to transition from the extended position to the retracted position as described above.
In order for the inner cables 111 to effectively transfer the pushing force to the casters 106, the inner cables 111 may be designed to withstand a sufficient amount of compressive force without buckling. The sufficient amount of compressive force may vary across different applications. Namely, the sufficient amount of compressive force may depend on both the weight of the article of furniture and the number of furniture legs. For instance, consider an example in which the retractable furniture caster system 100 described herein is integrated into a four-legged table weighing one hundred pounds. Assuming a uniform weight distribution, in order to push the casters 106 into the extended position and lift the table off the ground, each of the casters 106 and their attached inner cables 111 would have to be capable of supporting, at a minimum, twenty-five pounds of force (i.e., one fourth of the table weight, which is distributed across the four casters 106 in the four table legs). As such, when determining which materials to use for the inner cables 111, one should consider the amount of force that the inner cables 111 will be subjected to. For heavier furniture, it may be desirable to use higher tensile strength materials for the inner cables 111, such as solid core steel cables. Whereas, for lighter furniture, lower tensile strength materials, such as braided metals, may be used.
The actuator 112 may take various forms and may be configured to pull the slidable portion 406 of the push block 402 in various ways. As shown in
As further shown in
Additionally, the actuator 112 may be positioned on the underside 422 of the furniture such that the handle of the actuator 112 is near an edge 424 of the article of furniture. The edge 424 may be an edge that is typically gripped by a person when moving the article of furniture, and the handle may be positioned close enough to the edge 424 so that when a person grips the edge 424, the person may concurrently grip the handle of the actuator 112. For instance, the handle may be positioned within one to three inches of the edge 424 of the furniture, but other examples are possible as well. With such an arrangement, a person can grab the handle and actuate the actuator 112 using the same or similar grip that the person would otherwise use to manually lift or move the furniture without the assistance of the retractable furniture caster system 100.
Various aspects of the retractable furniture caster system 100 described herein may take different forms than those described above. For instance, in some examples, the actuator 112 may take the form of an electric motor such as a DC motor, an AC motor, a servo motor, a linear motor, or a stepper motor. In such examples, the motor may be coupled to a power supply, such as a battery or a wall power outlet.
The motor may be configured to function in a similar manner as the manual actuator depicted in
In other examples, the motor may be one of multiple motors that function differently than the manual actuator depicted in
Example embodiments of the disclosed innovations have been described above. Those skilled in the art will understand, however, that changes and modifications may be made to the embodiments described without departing from the true scope and spirit of the present invention, which will be defined by the claims.
Further, to the extent that examples described herein involve operations performed or initiated by actors, such as “persons,” “humans,” “operators,” “users,” or other entities, this is for purposes of example and explanation only. The claims should not be construed as requiring action by such actors unless explicitly recited in the claim language.
This application claims the benefit under 35 U.S.C. § 119 of U.S. Provisional Patent App. No. 63/139,251, filed Jan. 19, 2021, which is incorporated herein by reference in its entirety.
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20220227172 A1 | Jul 2022 | US |
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63139251 | Jan 2021 | US |