BACKGROUND

[0001] The present disclosure relates to rollers, for example, for rolling muscles.

[0002] Athletes often use rollers to relieve soreness, inflammation, or tightness and increase range of motion, for example, in association with an exercise routine. Typical muscle rollers are not well adapted to different sizes of people or their various muscle groups. Traditionally, a user may be required to purchase multiple muscle rollers or use a roller that is incorrectly sized to their specific size or muscle group. [0003] Accordingly, a solution is needed for providing an adaptable muscle roller.

SUMMARY

[0004] An expandable muscle-roller assembly system may include various aspects and implementations. One general aspect of the system includes a hub system including one or more hub coupling mechanisms coupling a first modular wheel with a second modular wheel, the hub system adjustably varying a distance between the first modular wheel and the second modular wheel; a plurality of modular wheels including the first modular wheel, the second modular wheel, and a third modular wheel, the first modular wheel including a hub coupling mechanism receiver that detachably couples with the one or more hub coupling mechanisms of the hub system, the first modular wheel including a first wheel connector component that detachably couples the first modular wheel with the third modular wheel using a second wheel connector component connected with the third modular wheel; and a handle detachably coupling with one or more of the second modular wheel and the hub system. [0005] Some implementations may include one or more of the following features: that the first modular wheel includes an outer rim, the first wheel connector component is coupled on a radially inward surface of the outer rim, and the second wheel connector component of the third modular wheel includes a protrusion extending axially from the third modular wheel and adapted to interface with the first wheel connector component of the first modular wheel to couple the third modular wheel with the first modular wheel; and that one or more hub coupling mechanisms include button and a spring, the spring exerting a circumferential force on the button, and the hub coupling mechanism receiver includes a channel that moves the button as the hub system is being inserted into a central axis aperture of the first modular wheel and allows the spring to move the button circumferentially into a locking position when the hub system is fully inserted into the central axis aperture of the first modular wheel.

[0006] Another general aspect of the system includes a plurality of modular wheels including a first modular wheel and a second modular wheel; and a hub system including one or more hub coupling mechanisms coupling the first modular wheel with the second modular wheel, the hub system adjustably varying a distance between the first modular wheel and the second modular wheel.

[0007] Some implementations may additionally or alternatively include one or more of the following features: wherein the first modular wheel includes: a hub coupling mechanism receiver that couples with the one or more hub coupling mechanisms of the hub system, a first wheel connector component of the first modular wheel that detachably couples the first modular wheel with a second wheel connector component of a third modular wheel, the third modular wheel coupling with the first modular wheel axially; that the third modular wheel includes a first wheel connector component, the first wheel connector component of the third modular wheel including a thread extending circumferentially around a portion of the third modular wheel, the thread detachably coupling with a second wheel connector component of a fourth modular wheel, and the fourth modular wheel couples with the third modular wheel axially; that the first modular wheel includes an outer rim, the first wheel connector component is coupled on a radially inward surface of the outer rim, and the second wheel connector component of the third modular wheel includes a protrusion extending axially from the third modular wheel and adapted to interface with the first wheel connector component of the first modular wheel to couple the third modular wheel with the first modular wheel; that each of the plurality of modular wheels includes a wheel connector and a wheel connector receptacle, the wheel connector and the wheel connector receptacle being adapted to allow additional modular wheels to be connected to the hub system thereby longitudinally extending a length of the muscle-roller assembly; that the first modular wheel includes one or more ridges extending circumferentially on an outer rim of the first modular wheel; and that the first modular wheel includes a pliable surface on a radially outward edge of an outer rim of the first modular wheel.

[0008] Some implementations may additionally or alternatively include one or more of the following features: that one or more hub coupling mechanisms include button and a resilient member, the resilient member exerting a circumferential force on the button; that the first modular wheel includes a channel that deforms the resilient member and moves the button as the hub system is being inserted into a central axis aperture of the first modular wheel and allows the resilient member to move the button circumferentially into a locking position when the hub system is fully inserted into the central axis aperture of the first modular wheel; that the hub system includes a telescoping member adapted to adjustably increase or decrease the distance between the first modular wheel and the second modular wheel; that the muscle-roller assembly further comprises a handle coupled with one or more of the hub system, the first modular wheel, and the second modular wheel; that the handle includes a bar passing through the first modular wheel and detachably coupling with the hub system, the first modular wheel rotating about an axis formed by the bar of the handle; and that the bar of the handle is held in place by a magnet in the hub system.

[0009] Another general aspect of the system includes a plurality of modular wheels including a first modular wheel and a second modular wheel; and means for coupling the first modular wheel with the second modular wheel and adjustably varying a distance between the first modular wheel and the second modular wheel.

[0010] Some implementations may additionally or alternatively include one or more of the following features: that the system further comprises: means for detachably coupling the first modular wheel with the means for coupling the first modular wheel with the second modular wheel, and means for detachably coupling the first modular wheel with a third modular wheel in a direction that is axial to both the first modular wheel and the third modular wheel; that the means for detachably coupling the first modular wheel with the third modular wheel includes: means for coupling the first modular wheel with the third modular wheel when the first modular wheel is rotated in a first direction relative to the third modular wheel and decoupling the third modular wheel when the first modular wheel is rotated in a second direction relative to the third modular wheel, the second direction opposing the first direction, means for automatically locking the first modular wheel to the means for coupling the first modular wheel with the second modular wheel when the means for coupling the first modular wheel with the second modular wheel is moved toward the first modular wheel; a handle; and means for coupling the handle with the first modular wheel and allowing the first modular wheel to rotate about an axis formed by the handle. [0011] Other implementations of one or more of these aspects include corresponding systems, apparatus, and computer programs, configured to perform the actions of the methods, encoded on computer storage devices.

[0012] It should be understood that the language used in the present disclosure has been principally selected for readability and instructional purposes, and not to limit the scope of the subject matter disclosed herein.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The disclosure is illustrated by way of example, and not by way of limitation in the figures of the accompanying drawings in which like reference numerals are used to refer to similar elements.

[0014] Figure 1 A illustrates a perspective view of an example muscle-roller assembly in an extended configuration.

[0015] Figure 1 B is a perspective view of an example muscle-roller assembly in a collapsed position.

[0016] Figure 1C is a perspective view of an example muscle-roller assembly including a ridge running around an outer circumference of the assembly.

[0017] Figure 1 D is a cross-sectional view of an example muscle-roller assembly.

[0018] Figure 2 is a perspective view illustrating an example muscle-roller assembly with handles.

[0019] Figure 3A illustrates a perspective view of an example muscle-roller assembly in an extended configuration.

[0020] Figure 3B illustrates a perspective view of an example muscle-roller assembly with added modular wheel segments. [0021] Figure 4A illustrates a perspective view of an example modular wheel segment.

[0022] Figure 4B illustrates a perspective view of an example modular wheel segment.

[0023] Figure 4C illustrates a perspective view of an example outer wheel portion decoupled from a modular wheel segment.

[0024] Figure 4D and Figure 4E illustrate views of an example modular wheel segment.

[0025] Figure 5A illustrates a perspective view of an example hub system.

[0026] Figure 5B illustrates an example hub system with a displaced hub coupling mechanism.

[0027] Figure 5C illustrates a perspective view of an example hub system in an elongated position.

[0028] Figure 5D illustrates the example hub system in a collapsed position.

[0029] Figure 5E illustrates an exploded view of an example hub system.

[0030] Figure 6A illustrates an exploded view of a muscle-roller assembly.

[0031] Figure 6B illustrates a perspective view of an example modular wheel segment.

[0032] Figure 6C illustrates a cross-sectional view of two example modular wheel segments coupled together with an example wheel connector.

DESCRIPTION

[0033] The present disclosure describes an innovative technology relating to a muscle-roller assembly 102. The assembly 102 may include, for example, one or more wheels 104 supported by a hub system 106 that couples two or more of the wheels 104 and may allow them to rotate about a central axis. For instance, the wheels 104 may have attached or integrated therewith a foam or other surface that may provide a comfortable, textured, and/or high friction surface via which the muscle roller may apply pressure to a user. For example, the user may roll the muscle-roller assembly 102 against a muscle to ease soreness or tension.

[0034] Multiple wheels 104 of the muscle-roller assembly 102 may be attached together using a hub system 106. In some implementations, the hub system 106 may include one or more coupling mechanisms that couple sections or segments of the hub system 106 together and an expansion mechanism that allows the muscle-roller assembly 102 to extend longitudinally (e.g., by separating or elongating wheels 104 coupled with the segments of the hub system 106). For instance, the hub system 106 may include a telescoping coupling member that elongates the hub system 106 and, correspondingly, the muscle-roller assembly 102. For instance, two sections or segments of the hub system 106 may separate, while remaining coupled, using the expansion mechanism.

[0035] In some implementations, the muscle-roller assembly 102 may include connectors that allow modular wheels or segments 104 to couple together in such a way that additional wheels or segments 104 can be added to the assembly 102, thereby elongating the assembly 102 and allowing it to accommodate larger users or muscle groups. For instance, modular wheels or segments 104 may be connected together in series to create a longer or shorter muscle-roller assembly 102. Depending on the implementation, one or more of the modular wheels 104 may include, be attached to, or have integrated a roller wheel and contact surface, as described above, so that as the muscle-roller assembly 102 becomes longer (e.g., by elongating the expansion mechanism and/or coupling additional wheels 104) the contact surface also becomes longer.

[0036] In some implementations, the muscle-roller assembly 102 may also include one or more handles 202. For instance, a handle 202 may be integrated into or attachable to the hub system 106 or one or more wheels 104, so that the wheels 104 rotate respective to the handle(s) 202. In some implementations, a handle 202 may include a bar that extends through a longitudinal axis of the hub system 106 thereby providing rigidity to the muscle-roller assembly 102 and/or allowing the hub system 106 and wheels 104 to rotate about the bar. In some implementations, a handle 202 may be integrated into an attachable modular segment, may attach to a modular segment, and/or may couple with a hub system 106.

[0037] These and other example implementations of the technology are described in reference to the figures below.

[0038] With reference to the figures, reference numbers may be used to refer to components found in any of the figures, regardless whether those reference numbers are shown in the figures being described. Further, where a reference number includes a letter referring to one of multiple similar components (e.g., component 000a, 000b, and OOOn), the reference number may be used without the letter to refer to one or all of the similar components.

[0039] Figure 1 A illustrates a perspective view of an example implementation of a muscle-roller assembly 102 in an extended configuration. As illustrated, the muscleroller assembly 102 may include one or a plurality of modular wheel segments

104a... 104b (modular wheel segments may be referred to herein as modular wheels or modular segments) connected in series. Additionally, as illustrated, the muscle-roller assembly 102 may include hub system 106 couples the modular segments and may longitudinally extend a length the muscle-roller assembly 102. For instance, the illustrated example of the expansion system 106 may include a telescoping coupling or expansion mechanism that connects segments of the muscle-roller assembly 102 together. The expansion mechanism of the hub system 106 may adjustably vary a distance between the first modular wheel 104a and the second modular wheel 104b. Example implementations of the hub system 106 are described in further detail throughout this disclosure, for example, in reference to Figures 5A-5E.

[0040] As illustrated in Figure 1A, the muscle-roller assembly 102 may include two modular wheel segments 104a and 104b coupled with a hub system 106. As illustrated in Figure 1A, the hub system 106 has been expanded (e.g., as described in further detail below). The hub system 106 may additionally or alternatively include various configurations of hub coupling mechanisms 108 that couple one or more of the modular segments with the hub system 106. An example hub coupling mechanism 108 is illustrated and is described in further detail below.

[0041] Depending on the implementation, a modular wheel 104 may include a hub coupling mechanism receiver 110, an outer rim 112 (e.g. , coupled with the hub coupling mechanism receiver 110), an outer wheel portion 114, and/or a wheel connector component 116, which are described in further detail elsewhere herein. As illustrated in the example of Figure 1A, the hub coupling mechanism receiver 110 may couple with the hub system 106, for example using a hub coupling mechanism 108, as described below.

[0042] The outer rim 112 of the wheel 104 may be held by spokes, a solid wheel, another structure, or may be freestanding. In some implementations, the wheel connector component 116 may be integrated into, attached to, or otherwise connected with the outer rim 112, although it should be noted that it may be connected to another portion of the modular wheel 104, as described below. The wheel connector component(s) 116 may connect one or more modular wheels 104 together.

[0043] In some implementations, the outer wheel portion 114 may include or have attached thereto a contact surface, which may provide cushioning, various surfaces, and/or friction between the modular wheel 104 (e.g., the outer rim 112) and a user. For example, the outer wheel portion 114 may include a pliable material (e.g., foam, rubber, cloth, etc.) with ridges, textures, bumps, protrusions, or other structures, which improve friction, kneading, massaging, or other features of the muscle-roller assembly 102. Various implementations of the outer wheel portion 114 are described elsewhere herein, for example, in reference to Figures 1 C, 3B, and 4C.

[0044] Figure 1 B is a perspective view of an example implementation of a muscle-roller assembly 102. For example, Figure 1 B illustrates the expansion mechanism of the hub system 106 in contracted or collapsed state, so that the first modular wheel 104a and the second modular wheel 104b are adjacent to each other, although they may be at any distance from each other when the hub system 106 is collapsed. As illustrated, the expandable hub system 106 may couple two wheels 104 together and may allow the distance between the two wheels/segments 104 to be compressed so that the wheels 104 touch, for instance, when the hub system 106 and/or wheels 104 are flat or nest together. The expansion mechanism may allow the distance between the coupled wheels 104 to be expanded, for example, to a distance of two (or some other measurement) inches apart, as described and illustrated in reference to Figure 1A.

[0045] Additionally, as more clearly shown in Figure 1 B, the first (and/or second, depending on the implementation) modular wheel 104 may include a hub coupling mechanism receiver 110 that couples with the one or more hub coupling mechanisms system(s) 106 may include a means for automatically locking the first modular wheel 104 to a means for coupling the first modular wheel 104 with the second modular wheel 104 when the means for coupling the first modular wheel 104 with the second modular wheel 104 is moved toward the first modular wheel 104, as described and illustrated throughout this disclosure.

[0046] Figure 1C is a perspective view of an example implementation of a muscle-roller assembly 102, where the outer wheel portion 114 includes various structures, such as a ridge 122 running around an outer circumference of the outer wheel portion 114. For instance, a modular wheel 104 may include one or more ridges 122 extending circumferentially on an outer rim 112 of the modular wheel 104. The ridges 122 may run at various angles, may have various heights, various quantities or positions, or profiles or shapes. The ridges 122 may be coupled with, attachable/detachable to/from, or integrated with the surface of the outer wheel portion 114. In some instances, the ridges 122 and the surface material may have different materials, softness, coefficients of friction, etc.

[0047] As illustrated, a modular wheel segment 104 may have a ridge 122 extending around a circumference of the outer surface of the modular wheel segment 104 (e.g., of 114). Each segment may include one or multiple ridges 122. Additionally, the expandability of the hub system 106 allows the ridges 122 to be positioned differently, thereby interacting with different muscles or portions thereof. Although the ridge 122 is illustrated as a half circle (from a cross-sectional perspective), it may be squared, triangular or have another profile. The ridge 122 may have various sizes or positions on a modular wheel segment 104. For example, a ridge 122 may have a higher (e.g., ranging from one-fourth inch to one inch above a surface of the wheel, although other implementations are possible and contemplated herein) profile to provide additional pressure, a lower profile to provide less pressure, or a combination thereof.

In some implementations, the outer surface of a modular wheel segment 104 may include a channel or flat space onto which a band may be placed (and potentially held in place) thereby forming a ridge 122, such as is illustrated. Also, while a single ridge 122 is shown, a modular wheel segment 104 may have a plurality of ridges 122, such as two or more ridges 122 that are parallel and spaced apart from one-another, etc. [0048] Although the ridge 122 is illustrated as a straight member circumnavigating the wheel, it should be noted that it may have another pattern or configuration. For instance, the ridge 122 may zig-zag, slant across the wheel, or be intermittently placed in any other pattern.

[0049] Advantageously, two ridged modular wheel segments 104 may be adjacently situated such that when rolled along the spine or other specific bodily regions, each ridge 122 engages with muscular tissue while avoiding placing too much pressure on the spinal column. Further, for users with different body configurations, an assembly of modular wheel segments 104 can be customized such that the modular wheel segments 104 with ridges 122 can spaced by placing one or more flat, concave, or other-shaped modular wheel segment(s) 104 of the same or narrower width inbetween the ridged modular wheel segments 104. Numerous other configurations are also possible and contemplated.

[0050] Figure 1 D is a cross-sectional view of an example muscle-roller assembly 102. As illustrated, an example first modular wheel 104a and an example second modular wheel 104b are coupled with an example hub system 106. As illustrated, the connector on each segment may include a button that latches or un-laches a first connector half, such as a hook or clip, of the hub coupling mechanism 108 with a modular wheel 104 (e.g., a receptacle). Example details of these systems are described in reference to the other figures herein.

[0051] As illustrated, the modular wheel 104 may include a central structure coupling the outer rim 112 with the hub system 106, such as the illustrated spokes 132, although other structures are possible and contemplated. In some implementations, a modular wheel 104 may include an aperture 134 through which a handle 202 or component thereof may pass through in order to couple with the hub system 106, which may include a corresponding aperture and/or handle receiver 136, although it should be noted that a handle 202 may couple with a modular wheel 104 or other structure, as described below. In some implementations, the handle receiver 136 of the hub system 106 may include one or more retention mechanisms, such as a magnet 138, which holds the handle 202 into the handle receiver 136. The retention mechanism may allow the hub system 106 and/or modular wheels 104 to rotate about the handle 202, an example implementation of which is illustrated in reference to Figure 2.

[0052] Figure 2 is a perspective view illustrating an example muscle-roller assembly 102 with handles 202a and 202b. The handles 202 may be permanently or detachably attached to the modular wheels 104 and/or the hub system 106. For instance, the muscle-roller assembly 102 may include a handle 202 coupled with one or more of the hub system 106, the first modular wheel 104a, and the second modular wheel 104b.

[0053] Depending on the implementation, the handle 202 may include a bar 204 that passes through one or more of the modular wheels 104 and detachably couples with the hub system 106. The modular wheels 104 and/or hub system 106 may rotate about an axis formed by the bar 204 of the handle 202. In some implementations, the handle 202 (e.g., via the bar 204) may be held in place in the modular wheel 104 and/or hub mechanism using a retention mechanism, such as a handle 202 in the hub system

106, as described above, or another mechanism, such as a ball and plunger system, clasp, compression ring, screw threads, friction, or other mechanisms.

[0054] For instance, as illustrated above in reference to the hub system 106, a handle 202 may be inserted into a retention mechanism. In some implementations, a central portion of a modular wheel segment 104 may include a retention mechanism, or another mechanism adapted to couple with a handle 202, so that the handle 202 may be attached to a muscle-roller assembly 102 of any length. As discussed in further detail above, a handle 202 may be permanently attached to a certain modular wheel segment 104 or may use another method of coupling with the muscle-roller assembly 102.

[0055] In some implementations, as discussed above and illustrated in Figure 1 D, some or all of the components of the hub system 106 may include channel, aperture, or receiver 136 passing through them to allow a handle 202 (e.g., a bar 204 or other elongated member) to connect to or pass through the hub system 106. It should be noted that, although the receiver 136 is illustrated as round, it may be any other shape (e.g., rectangular, asymmetrical, etc.). In some implementations, the receiver may include an apparatus, such as a magnet, deformable ring or ridge, collar, etc., for retaining the handle 202 in the channel once inserted and during use.

[0056] Additionally, although the channel (e.g., the aperture 134 and/or handle receiver 136) is shown extending into and not through the hub system 106, the channel may alternatively extend completely through some or all of the components, so that the handle 202 may pass through some or the entirety of the muscle-roller assembly 102. Depending on the implementation, the handle 202 may include a handle at each end of a bar 204, and one or both of the handles 202 may be detachable to allow the bar 204 to pass through the channel.

[0057] In some implementations, a modular wheel segment 104 may include a handle 202 protruding from one side of the modular wheel segment 104, so that when the handle 202/modular wheel segment 104 is attached to the roller assembly 102 (e.g., to another modular wheel 104 or hub system 106), the handle 202 may be used to roll the assembly 102. For instance, a handle 202 may include a modular wheel 104, as in the illustrated wheel segments 104, that includes the same coupling mechanism(s) as the other modular wheel segments 104, which coupling mechanism may be used to attach the handle wheel segment with the other modular wheel segments 104.

[0058] Figure 3A illustrates a perspective view of an implementation of a muscleroller assembly 102 in an extended configuration. As illustrated, the hub system 106 is extended, a first modular wheel 104a and a second modular wheel 104b are coupled to a hub system 106, a third modular wheel 104c is coupled with the first modular wheel 104a, and a fourth modular wheel 104d is coupled with the second modular wheel 104b. Accordingly, a muscle-roller assembly 102 of any length can be assembled using the detachable/attachable modular wheel segments 104.

[0059] For example, the third modular wheel segment 104c may include a first wheel connector component 116 that detachably couples the third modular wheel 104c with a second wheel connector component 116 of another modular wheel (e.g., axially to both wheels 104 or longitudinally to extend a length of the muscle-roller assembly 102). Accordingly, some or all of the modular wheel segments 104 may include both a first and second wheel connector component 116 (e.g., on opposing sides, as illustrated in Figures 4D and 4E) allowing multiple modular wheel segments 104 to be coupled in series. The wheel connectors/connector components may have various configurations, as described throughout this disclosure.

[0060] In some implementations, some modular wheel segments 104 may only include wheel connector components 116 on one side, so that other modular wheel segments 104 can only be connected on one of its sides. For example, as illustrated in Figure 3A, the first modular wheel 104a and second modular wheel 104b may not include an inner (e.g., toward a hub system 106, as illustrated) wheel connector component 116 to avoid a protrusion or interference with that of another modular wheel 104 coupled with the hub system 106. Accordingly, various modular wheel configurations may allow different connection capabilities with other wheels 104 or hub systems 106.

[0061] In some implementations, the modular wheel segments 104 may be coupled with the hub system 106 or one or more other modular wheel segments 104, for example, via a wheel connector of another modular wheel 104 and/or hub coupling mechanism 108 of a hub system 106 (e.g., using, a threaded portion, spring-loaded tab, or other mechanism, as described elsewhere herein). For example, example wheel connectors are described in further detail below in reference to Figures 4D, 4E, and 6A- 6C).

[0062] As described above, multiple of the modular wheel segments 104 may include a channel or aperture 134 at a central axis of the hub system 106 into which a handle 202 (not shown in Figure 3A) may be inserted. In some implementations, a bearing mechanism may also be provided to decrease friction of rotation. In some implementations, certain modular wheel segments 104 may lack spokes or may lack a channel or aperture 134 (e.g., as illustrated in the example of Figure 4D). [0063] Figure 3B illustrates a perspective view of an implementation of a muscleroller assembly 102 with four modular wheel segments 104. For instance, the hub system 106 is not extended/elongated (or is not capable of elongating, depending on the implementation) in the example of Figure 3B. As illustrated, the muscle-roller assembly 102 may include modular wheel segments 104 with various configurations. For example, the muscle-roller assembly 102 may include a first modular wheel 304a (e.g., as an example implementation of the modular wheels 104 described elsewhere herein) with a first ridge 122a (e.g., a different outer wheel portion 114), a second modular wheel 304b with a second ridge 122b, a third modular wheel segment 104c, and a further modular wheel segment 104d. Depending on the implementation, the four modular wheel segments 104 shown may be coupled directly or using one or more hub systems 106 (not shown).

[0064] Accordingly, a muscle-roller assembly 102 can be extended with any number of segments, whether or not they have the same or different features, textures, ridges, etc. As illustrated and discussed above, a modular wheel segment 104/304 may include one or more rows of protrusions situated radially around an outside surface of a modular wheel segment 104/304. For example, the protrusions may include pointed or rounded bumps positioned around the segment. In some instances, as shown, the bumps may be placed evenly, offset from other rows of bumps, or otherwise arranged. [0065] Figure 4A illustrates a perspective view of an example single modular wheel segment 104 decoupled from any other wheel(s) 104 or hub system(s) 106. As illustrated in Figure 4A and described elsewhere herein, the modular wheel segment 104 may include an outer wheel portion 114, a hub coupling mechanism receiver 110, an outer rim 112, and a wheel connector component 116. Additionally, as illustrated in the example of Figure 4A, the modular wheel segment 104 may include spokes 132 and an aperture 134, although other implementations are possible, such as where the center of the wheel is solid or empty (e.g., without spokes 132 or a hub coupling mechanism receiver 110). In some implementations, the modular wheel segment 104 may include a central axis aperture 434 into which a hub system 106 or portion thereof may extend, mount, be inserted into, engage, or otherwise interact. For example, the central axis aperture 434 may include a void shaped to accept a hub system 106 and its corresponding shape.

[0066] Figure 4B illustrates a perspective view of an example single modular wheel segment 104 without an outer wheel portion 114 coupled with the outer rim 112. In some implementations, the outer wheel portion 114 may be interchangeable, thereby allowing various textures or surfaces to be on the radially outward edge of the modular wheel segment 104.

[0067] Although other implementations are possible, as illustrated, the outer rim 112 may have various structures. For example, the outer rim 112 may include a radially outward surface 422, a radially inward surface 424, and other structures 426 (e.g., spokes, webbing, honeycomb, foam, solid material, etc.) coupling the outward surface 422 and inward surface 424.

[0068] Additionally, as illustrated in the example, one or more wheel connector components 116 located on the radially inward surface 424 (e.g., to avoid contact a user). Additionally or alternatively, a hub coupling mechanism 108 may use the same mechanism(s) and/or structure(s) as the wheel connector described herein, so that a modular wheel 104 couples with a hub system 106 in the same way as with other modular wheels 104. Similarly, wheel connector may use the same mechanism(s) and/or structure(s) as the hub coupling mechanisms 108 described herein. [0069] Figure 4C illustrates a perspective view of an example outer wheel portion

414 (e.g., as an example implementation of the outer wheel portions 114 described elsewhere herein) decoupled from a modular wheel segment 104. For instance, the outer wheel portion 414 and/or a radially outward surface of a modular wheel 104 may include a pliable surface, which may include a flat piece (e.g., a foam or compressible wheel) or other accessories, structures, or textures. For instance, it may include ridges, bumps, foam spikes, or other structures, such as the bumps 432 illustrated in Figure 4C.

[0070] Figure 4D and Figure 4E illustrate example modular wheel segments 404, for example, the modular wheel 404 and 404 illustrated in Figures 4D and 4E may represent the same modular wheel 404, which may correspond to two views of an example implementation of a modular wheel 104. For example, Figure 4A may illustrate view of a front side of a modular wheel 404 and Figure 4B may illustrate a view of a back side of the modular wheel 404. The modular wheel segment 404 may additionally include an outer surface member, as described above, which may provide additional padding or friction to its outer circumference.

[0071] As illustrated, the modular wheel 404 may include one or more connection mechanisms for connecting the modular wheel 404 with one or more other modular wheels 404. For instance, the modular wheel 404 may include a first wheel connection component 416a and a second wheel connection component 416b, which may include partial threads, as illustrated in Figures 4D and 4E, although other implementations, such as the others described herein are possible and contemplated.

[0072] As illustrated in the example of Figures 4D and 4E, the first and second (or any other quantity) wheel connection components 416a and 416b (e.g., as an example of the wheel connection component(s) 116 described elsewhere herein) may be coupled (e.g., on a radially inward surface) with an outer rim 112.

[0073] As illustrated in Figures 4D and 4E, a modular wheel segment 404 may include a connection mechanism, such as the wheel connectors described herein. In the illustrated example, the connection mechanism may include one or more tabs or other extensions 442a, 442b, 442c (e.g., from a back side, as illustrated in Figure 4E) that extend from one wheel segment to a second wheel segment to couple two wheel segments together. For example, as illustrated, one or more of the tabs 442 may have threads or partial threads that may interact with corresponding threads (e.g., 416 or 116) or receptacles on another segment, such as when the segment(s) are rotated. One or more of the modular wheel segments 404 may have both the connector and connector receptacle to connect a series of modular wheel segments 404 together, as described above.

[0074] For example, a modular wheel 404 may include a first wheel connector component 416a, which may include a thread extending circumferentially around a portion of the modular wheel 404. The thread may detachably couple with a second wheel connector component 416b on another modular wheel 404 (e.g., as though a front side in Figure 4D is coupling with a rear side in Figure 4E). The modular wheel segments 404 may accordingly couple in their axial direction to longitudinally extend the muscle-roller assembly 102. The second wheel connector component 416b may be coupled with or may include a tab or protrusion 442 extending axially from the second modular wheel 404 and adapted to interface with the first wheel connector component 416a of the first modular wheel 404 to couple the second modular wheel 404 with the first modular wheel 404. Accordingly, when the first and second modular wheels 404 being connected are moved toward each other and then rotated relative (e.g., in a first direction to couple and an opposing direction to decouple) to each other, they may be coupled together.

[0075] For example, a modular wheel segment 404 may include a threaded portion, clasp, and/or another coupling portion. For instance, the coupling portion may include a threaded portion that activates a clasp once the threaded portion has been sufficiently rotated. As a further example, the threaded portion may be disposed around a rim of the modular wheel segment 404. The thread portion may include one or more sections, which may be continuous or discontinuous. The thread portion may engage with a corresponding receiving thread portion (which may also have one or more sections that are continuous or discontinuous) on an adjacent modular wheel segment 404. In some cases, each modular wheel segment 404 may have male-type protruding thread portions on a first side of a rim and female-type thread portions configured to receive and engage with the male-type protruding thread portions when rotate in a given direction (e.g., counterclockwise, clockwise, etc.). However, it should be understood that other types of coupling portions for securely coupling modular wheel segments 404 together may be used and are contemplated (e.g., clips, button-actuated cleats, etc.)

[0076] In some implementations, the wheel connection mechanism may include a locking mechanism that locks, resists, or provides audible, visual, or haptic feedback when the threads are correctly or fully meshed (e.g., when the segments are twisted together in a coupled position). For instance, a thread (or tab, etc.) may have a bump, tooth, sprung clasp, or similar mechanism that clicks into place when the threads are fully twisted to connect segments together. In some implementations, sufficient force and/or an unlocking mechanism may be used to allow the threads to untwist. For instance, a modular wheel segment 404 may include a depressible button (e.g., located inside the wheel on the hub and/or tab) that unlocks (or locks) the ability to twist the modular wheel segment 404 respective to a second modular wheel segment 404 or accessory.

[0077] A center of a modular wheel segment 404 may be generally hollow or may include various other structures or accessories. For instance, a modular wheel segment 404 may include a heater, vibration mechanism, batteries, or electronics to add additional functionality. For instance, a given modular wheel segment 404 may vibrate or heat to improve the massaging effect of the muscle-roller assembly 102. Similarly, a modular wheel segment 404 may include electronics, such as sensors, a controller, a Bluetooth™ radio, or other components that may wirelessly provide control or analytics via a connected client device, such as a smartphone.

[0078] Figure 5A illustrates a perspective view of a hub system 106 according to some implementations. As illustrated, the hub system 106 is decoupled from the muscle-roller assembly 102, but, when coupled together, a first end 502a may be inserted into (or otherwise interact with) a corresponding structure a first modular wheel 104 and a second end 502b may be inserted into (or otherwise interact with) a corresponding structure on a second modular wheel 104.

[0079] In some implementations, the hub system 106 may include one or more hub coupling mechanisms 508a and 508b (e.g., which may correspond to the hub coupling mechanism(s) 108 described elsewhere herein). For example, the one or more coupling mechanisms may include a tab or button (or other structure) and a resilient member 510a or 510b that exerts a force (e.g., in a radial or circumferential direction) on the button to cause it to be in a certain resting position. When in the resting position, the tab or button may engage with a corresponding receiver on a modular wheel segment 104 to keep the modular wheel segment 104 coupled with the hub system 106.

[0080] In some implementations, the first modular wheel 104 may include a channel, slot, or other structure through which the button, hub coupling mechanism 508, or component thereof may pass and/or engage. For example, as illustrated elsewhere herein, such as in the example of Figure 4A, may include a channel (e.g., as or including the hub coupling mechanism receiver 110) that guides the hub coupling mechanism 508 into a holding position. The channel may deform the resilient member 510 and move the button as the hub system 106 is being inserted into a central axis aperture 434 of a modular wheel 104. For example, the channel may be sloped/slanted sideways to push the button sideways. The channel may be shaped to allow the resilient member 510 to move the button circumferentially (or radially, etc.) into a locking position (e.g., as illustrated in Figure 1A) when the hub system 106 is fully inserted into the central axis aperture 434 of the first modular wheel 104. For instance, an example channel configuration is illustrated in Figure 4A, although other implementations are possible. For instance, the button may be pushed outward to lock it in place, or another implementation such as those described below is possible.

[0081] A resilient member 510 may include spring, magnet, or any other mechanism that allows the hub coupling mechanism 508 to be detachably coupled with a modular wheel segment 104, although it should be noted that a hub system 106 may be permanently connected or integrated with a modular wheel segment 104 (e.g., using adhesive, screws, continuous material, etc.). Figure 5A illustrates an example resilient member 510 (e.g., a leaf spring or bent member) that exerts a circumferential force on the tab or button. [0082] Figure 5B illustrates the hub system 106 of Figure 5A but with the button 508a pressed circumferentially as if the hub system 106 were being inserted into a modular wheel segment 104, as described above. Once the hub system 106 is fully inserted into a modular wheel segment 104, the button 508a may return to the position illustrated in Figure 5A and 1 B, for example.

[0083] In some implementations, a button 508 may be depressible (e.g., radially toward or away from a central axis of the hub system 106) and spring loaded to snap into place in a corresponding receptacle in a modular wheel segment 104, although other implementations are possible and contemplated herein.

[0084] As illustrated in Figure 5A, a hub system 106 may include a notch, wall, protrusion, channel, bead, or other structure 512 (Figure 5A shows two structures 512a and 512b) that prevent the hub system 106 from rotating within a central axis aperture 434 of a modular wheel segment 104. Accordingly, for example, when the hub system 106 is inserted into a central axis aperture 434, the structure 512 may interact with a corresponding structure (e.g., channel, recess, etc.) in the modular wheel segment 104 to prevent rotation of the hub system 106 (e.g., the portion of the hub system 106 coupled with the modular wheel segment 104) relative to the modular wheel segment 104.

[0085] As illustrated in the example implementation of Figure 1 B above, when the hub system 106 is inserted into a modular wheel segment 104, a button 508 may slide into a channel or other structure 110. Once the button 508 is completely inserted into the channel 110, it may be moved (e.g., by a spring or manual pressure by a user) sideways in the channel (e.g., where the slot is an L or 7 shape, as illustrated) to lock the hub system 106 and modular wheel segment 104 together (e.g., where the structure

512 prevents hub-segment rotation). [0086] In some implementations, a hub system 106 may include a handle receiver 136, which may receive and retain a handle 202 (e.g., a bar of a handle 202), as described above. For example, in some implementations, the hub system 106 may include a retention mechanism or other structure that accepts one or more accessories, such as a handle 202, although other implementations are possible, such as the other features described above.

[0087] It should be noted that additional hub systems 106 may or may not, depending on the implementation, be used to extend the muscle-roller assembly 102. For instance, a single hub system may be used at a center of the assembly 102 and one or more interconnecting wheels may be added with or without the addition of more hub systems 106. For instance, while, in some implementations, multiple hub systems 106 may be used to connect modular wheel segments 104, modular wheel segments 104 may be connected without the use of the hub system 106 or using only a single hub system 106, as illustrated in Figure 1A and 6A.

[0088] Figure 5C illustrates a perspective view of an example hub system 106 in an expanded or elongated position. For example, the hub system 106 may include an expansion or telescoping member adapted to adjustably increase or decrease the distance between the first modular wheel 104 and the second modular wheel 104, as shown in Figures 5C-5E. For example, two halves 542a and 542b may move longitudinally away from each other to expand the expansion mechanism and hub system 106. The hub system 106 may have various levels of extension, which may be continuous or defined by one or more mechanical, friction, or magnetic stops, as described in reference to Figure 5E, which illustrates two separate halves 542a and 542b. Each of the halves 542a and 542b may include one or more hub connector mechanisms, as described above, for coupling with one or more modular wheel segments 104.

[0089] Figure 5D illustrates the example hub system 106 of Figure 5C but in a compact, collapsed, or shortened position. As illustrated in the transition between Figure 5C and 5D, the hub system 106 may rotate as it elongates. For example, the second half 542b is illustrated rotated relative to the first half 542a.

[0090] Figure 5E illustrates an exploded view of an example hub system 106, for example, two halves 542a and 542b of the hub system 106 are illustrated separate from each other. In some implementations, the hub system 106 may include an expansion mechanism 558, which may be integrated into one or both of the halves 542a and 542b, although it should be noted that other implementations are possible and contemplated, such as using other sliding, telescoping, or extending mechanisms. Similarly, it should be noted that not all implementations of the hub system 106 include an expansion mechanism (e.g., some of them do not expand), or include other mechanisms.

[0091] As illustrated, the expansion mechanism 558 may be a telescoping coupling member that includes one or more inner and outer tubes that slide past each other to allow the expansion mechanism 558 to telescope. In some implementations, the modular wheel segments 104 may include recesses into which a tube or portion of the expansion mechanism of the opposing segment may slide, thereby increasing the range that the expansion system may expand or contract.

[0092] In some implementations, the expandable center hub may include a series of steps 560 that lock at various levels of expansion. For instance, a stopping piece 562 (shown moved beyond the steps 560 for purposes of visibility) may slide along or interact with each step as the center hub rotates/twists, so that the center hub stops at various levels of expansion. As illustrated, the steps 560 may be or include protrusions, channels, or other structures around a perimeter of the hub system 106 (e.g., a second half 542b, as illustrated). There may also be a final step or ledge 564 with which the stopping piece may interact to prevent the expansion mechanism 558 from expanding too far or disassembling (e.g., allowing the halves 542a and 542b to separate).

[0093] In some implementations, although not illustrated in Figure 5E, the hub system 106 may include springs or other mechanisms to press the two halves 542a and 542b longitudinally inward or outward so that the stopping piece 562 remains in contact with the step(s) 560, although other structures or mechanisms may be used for this purpose. For example, a spring disposed in a cavity between the first and second halves 542a and 542b may exert a force causing the two halves 542a and 542b to push apart (or pull together) thereby maintaining contact between the stopping piece 562 and a step 560 until an opposing force is exerted (e.g., by a user) to lift the stopping piece 562 over a step barrier 566 or reset the steps to a starting position

[0094] Figure 6A illustrates a partially exploded view of a muscle-roller assembly 602 (e.g., the muscle-roller assembly 602 may represent an example implementation of the muscle-roller assembly 102 described elsewhere herein) according to some implementations. As illustrated in Figure 6A, one modular wheel segment 604d is coupled with the wheel segment 604b. Two more modular wheel segments 604c and 604e are shown decoupled from the muscle-roller assembly 602.

[0095] As illustrated, the hub system 606 (e.g., the hub system 606 may represent an example implementation of the hub system 106 described elsewhere herein) is shown in an expanded position (although, as noted elsewhere herein, the modular wheel segments 604 may be separated even when in a contracted position), for example, using an expansion mechanism. [0096] As illustrated in the example of Figure 6A, two wheel segments 604a and

604b are coupled with the hub system 606. The wheel segments 604a and 604b may be permanently coupled or integrated with the hub system 606, although other implementations, such as those described above are possible and contemplated herein. The hub-connected modular wheel segments 604a and 604b may be sized or configured differently than other, addable, modular wheel segments, such as 604c, 604d, and 604e.

[0097] Each of the modular wheels 604a...604e may include a connector mechanism (which may represent an example implementation of the wheel connector/wheel connector component 116 describe elsewhere herein), or component thereof, for coupling with other wheels 604 or hub systems, although they may be configured differently. For example, the example connector mechanism includes a connector 622 (e.g., a clasp, hook, clip, etc.) and associated button 624 located on a peripheral edge or outer rim 612 of the modular wheel segment 604. In some implementations, the connector 622 and/or button 624 may be coupled with a spring, such as the deformable metal plate 626.

[0098] One or more of the modular wheel segments 604 may additionally include a wheel connector receptacle 628 (e.g., a snap-in location, recess, groove, opposing clasp or hook, etc.) on an opposing side of the modular wheel segment 604, which may receive the connector 622 to hold two modular wheel segments 604 together. For instance, the modular wheel segment 604e is shown as including a connector 622 on a first side and a wheel connector receptacle 628 on an opposing side, so that a set of modular wheel segments 604 having this configuration may be connected in series. Accordingly, additional modular wheel segments 604 may be connected to a hub system 606 thereby longitudinally extending a length of the muscle-roller assembly 602. [0099] In some instances, when the button 624 is actuated, it couples or decouples the connector 622 from the connector receptacle 628. As described in further detail below, the button may be at a center axis of the modular wheel segment (e.g., as illustrated in Figure 6C) or offset (e.g., as illustrated in Figures 6A). It should also be noted that other implementations of the coupling mechanism are possible, such as a magnetic and/or spring latch, screw, or other mechanism.

[00100] Figure 6B illustrates a perspective view of an implementation of a modular wheel segment 642 (e.g., the modular wheel segment 644 may represent an example implementation of a modular wheel segment 104 described elsewhere herein).

[00101] The example modular wheel segment 644 includes an example coupling or connecting mechanism 646, which may be used to coupe multiple modular wheel segments 644 together and/or couple a modular wheel segment 644 with a hub system 106, such as the hub coupling mechanism 108 and receiver 110, and/or the wheel connector 116 described elsewhere herein.

[00102] As illustrated, the coupling mechanism 646 may include a magnetic or ferromagnetic material at 648 and corresponding material on the other side of the modular wheel segment 644 at 650. For instance, the magnetic materials may be located at the end of a protrusion and/or a recessed region of the modular wheel segment 644.

[00103] In some implementations, the protrusion or recessed region may additionally or alternatively include a spring plunger 652 with a steel ball that interacts with a cavity in the recessed region (e.g., at or near 650) to further retain the protrusion of a first modular wheel segment 644 in the recessed region of a second modular wheel segment 644. [00104] Figure 6C illustrates a cross-sectional view of two example modular wheel segments 664a and 664b coupled together with an example wheel connector. As shown, the wheel connector may include includes connectors 676 and connector receptacles 674 into which the connectors 676 may be inserted, which connectors 676 and receptacles 674 may be example implementations of the wheel connector component 116, 416a, or 416b, etc., described elsewhere herein. The connectors 676 may be coupled with a button 678 that, when pressed, causes the connectors 676 flex thereby causing them to decouple from the connector receptacles 674. For example, as illustrated, the button 678 may be depressed, which, due to contact with a structure 680 in the passage through which it is connected to the connector 676, causes the connector 676 to flex inward or outward.

[00105] As illustrated, the button and wheel connector 676 and 678 may be molded as a single piece and assembled between two halves 668a and 668b of a modular wheel segment 644. Similarly, portions of the passage through which the connector 676 passes may be attached to or integrated into the two halves 668a and 668b for ease of assembly.

[00106] It should be noted that although several different example implementations of the muscle-roller assembly 102 and its components are described herein, other implementations are possible, the components may be interchanged, removed, or changed, without departing from the scope of the disclosure.

[00107] It should be noted that although various implementations, measurements, and shapes are described herein other implementations are possible without departing from the scope of the techniques described herein. For instance, various other sizes and configurations of the parts described herein may be used, additional or fewer parts may be used, or other mechanisms [00108] Reference in the specification to “one implementation”, “an implementation”, “some implementations”, or “other implementations” means that a particular feature, structure, or characteristic described in connection with the implementation is included in at least one implementation of the disclosure. The appearances of the term “implementation” or “implementations” in various places in the specification are not necessarily all referring to the same implementation.

[00109] In addition, it should be understood and appreciated that variations, combinations, and equivalents of the specific implementations, implementations, and examples may exist, are contemplated, and are encompassed hereby. The invention should therefore not be limited by the above-described implementations, implementations, and examples, but by all implementations, implementations, and examples, and other equivalents within the scope and spirit of the invention as claimed.