Quick assembly methods and components for shade structures

Abstract

A quick connect system is provided for a shade structure. The system includes a hub and a rib. The hub has an upper portion, a lower portion, and a rib engagement section. The rib engagement section has a groove. The groove has an annular bearing zone, which may be disposed between two facing walls of the hub. The rib comprises an elongate body having an inner end and an outer end, the inner end of the rib having a pivot member. The annular bearing zone is configured to support end portion of the pivot member of the rib.

Claims

1. A shade structure assembly comprising: a hub comprising: an outer periphery; a groove extending radially inwardly from the outer periphery; a protrusion with a support surface disposed in the groove, the protrusion having a width less than a length; and a rib comprising: an elongate body having a longitudinal axis extending between an inner end and an outer end, an inner portion of the elongate body adjacent to the inner end being disposed in the groove; and a pivot member comprising a free end disposed away from the elongate body, the free end having a recess formed therein and an assembly access portion, the assembly access portion having a width greater than the width of the protrusion and less than the length of the access protrusion; wherein the pivot member comprises an outer periphery having circular ends and a non-circular portion disposed between the circular ends, the non-circular portion having a width less than two times a radius of the circular portion; and wherein the hub comprises an assembly access path having a width that is greater than the width of the non-circular portion and less than two times the radius of the circular portion.

2. The assembly of claim 1, wherein the hub and the pivot member are configured such that the assembly access portion faces the protrusion at a non-operational orientation when being assembled and faces away from a direction of insertion at operational orientations.

3. The assembly of claim 1, wherein a protrusion is disposed on each of two opposing sides of the groove and the pivot member comprises two opposing ends, each opposing end having a recess configured to receive a corresponding free end of the protrusion.

4. The assembly of claim 1, wherein the assembly access portion on the pivot member comprises an access path having an opening having a width greater than the width of the protrusion but less than the length of the protrusion.

5. A shade structure assembly comprising: a hub comprising: a passage configured to be disposed about a pole; an upper portion including a top surface extending between the passage and an outer periphery of the hub; a lower portion including a bottom surface extending between the passage and the outer periphery of the hub; a rib engagement section comprising a groove extending radially inwardly from the outer periphery, the groove including respective sides, and an annular bearing zone recessed within each of the respective sides of the groove, the annular bearing zones having an outward surface and an inward surface, the inward surface disposed on a protrusion extending toward the groove, the protrusion having a major dimension and a minor dimension; and a rib comprising: an elongate body having a longitudinal axis extending between an inner end and an outer end, an inner portion of the elongate body adjacent to the inner end being disposed in the groove; and a pivot member comprising a central portion extending through the inner portion of the elongate body, a first free end disposed away from the central portion and having a first recess formed therein and a second free end opposite the first free end and disposed away from the central portion, the second free end having a second recess formed therein; each of the first recess and the second recess comprising an assembly access path on one side thereof, the assembly access path having a width that is greater than the minor dimension and less than the major dimension; wherein the annular bearing zones are recessed in the respective sides of the groove and within a body of the hub formed by the upper and lower portions and the outward surfaces are disposed within the recessed annular bearing zones.

6. The assembly of claim 5, wherein the assembly access path is a first access path, and wherein the hub further comprises a second assembly access path extending from the outer periphery of the hub to the annular bearing zone.

7. The assembly of claim 6, second assembly access path having a width less than a width of the bearing zone measured between opposing portions of the outward surface.

8. The assembly of claim 6, wherein the second assembly access path forms an angle with a direction of the groove extending radially inwardly from the outer periphery.

9. The assembly of claim 6, the grooves comprising a distance, the assembly access paths comprising a distance greater than the distance between the grooves, and a distance between the protrusions greater than the distance between the grooves and less than the distance between the access paths.

10. The assembly of claim 6, wherein the pivot member comprises an outer surface disposed adjacent to and facing the outward surface of the annular bearing zone, the outer surface having a circular portion having a radius equal to or less than the radius of the outward surface of the annular bearing zone.

11. The assembly of claim 10, wherein the outer surface of the pivot member comprises a width less than two times the radius of the circular portion.

12. The assembly of claim 10, wherein the pivot member comprises a first lateral portion and a second lateral portion configured to be joined through an aperture in the elongate body.

13. The assembly of claim 12, wherein the first lateral portion comprises a projection and the second lateral portion comprises a recess configured to receive the projection of the first lateral portion, the pivot member comprises a locking member to secure the projection in the recess.

14. The assembly of claim 13, wherein the locking member comprises a deflectable member having a surface that moves to a low profile position during insertion of the projection into the recess and moves to a high profile position when the projection is fully inserted, the high profile position preventing disengagement of the first lateral portion from the second lateral portion.

15. The assembly of claim 14, wherein the deflectable member comprises a resiliently mounted wedge disposed on the projection of the first lateral portion, the resiliently mounted wedge comprising the surface, the second lateral portion comprising an aperture sized to permit the resiliently mounted wedge to move such that the surface is moved to the high profile position, the resiliently mounted wedge being at least partially received in the aperture with the surface abutting an edge of the aperture.

16. A shade structure hub comprising: a central portion; an upper portion including a top surface extending between the central portion and an outer periphery of the hub; a lower portion including a bottom surface extending between the central portion and the outer periphery of the hub; a rib engagement section comprising a groove extending radially inwardly from the outer periphery and an annular bearing zone disposed on a side of the groove, the annular bearing zone having an outward surface disposed about a protrusion extending through the annular bearing zone to a free end; wherein the annular bearing zones are configured to support an end portion of a pivot member of a rib within the annular bearing zones; wherein the annular bearing zones are recessed within the respective sides of the groove; wherein the annular bearing zones include an assembly access path aligned at an angle with respect to a direction of the groove extending radially inwardly from the outer periphery.

17. A shade structure hub of claim 16 wherein the pivot member is disposed in the annular bearing zone over the free end of the protrusion with an inward surface of the pivot member engaging at least one protrusion and an outward surface of the pivot member engaging an outward surface of the annular bearing zone.

18. The assembly of claim 16, wherein the protrusion further comprises an inward surface within the annular bearing zone, wherein the protrusion has a major dimension and a minor dimension, the major dimension aligned at an acute angle with the horizontal.

19. A shade structure hub comprising: a passage configured to be disposed about a pole; an upper portion including a top surface extending between the passage and an outer periphery of the hub; a lower portion including a bottom surface extending between the passage and the outer periphery of the hub; a rib engagement section comprising a groove extending radially inwardly from the outer periphery and an annular bearing zone disposed on each side of the groove, the annular bearing zones having an outward surface; and a pulley mounting zone disposed in the lower portion thereof, the pulley mounting zone being accessible from the outer periphery when the upper portion is separated from the lower portion wherein the annular bearing zone is configured to support an end portion of a pivot member of a rib.

20. The hub of claim 19, wherein the upper portion comprises a trapping member projecting from a lower side thereof, the trapping member being advanceable into a trapping position preventing a pulley disposed in the pulley mounting zone from coming out of the pulley mounting zone when the upper portion is assembled to the lower portion.

21. The hub of claim 20, further comprising a pulley disposed in the pulley mounting zone, and wherein the trapping member comprises two projections that are disposed on opposite sides of the pulley and are disposed between the pulley and the outer periphery of the hub.

22. The hub of claim 19, the pulley mounting zone comprising a wheel slot and a bearing slot, the wheel slot comprising having a dimension along the passage and the bearing slot extending transverse to the wheel slot.

23. The hub of claim 19, the annular bearing zones further comprising an inward surface disposed on a protrusion extending toward the groove.

24. The hub of claim 23, wherein the protrusion has a major dimension and a minor dimension, the major dimension aligned at an acute angle with the horizontal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The abovementioned and other features of the inventions disclosed herein are described below with reference to the drawings of the preferred embodiments. The embodiments are intended to illustrate, but not to limit the inventions. The drawings include the following figures.

(2) FIG. 1 is a side elevation view of an umbrella assembly including upper and lower hubs disposed about an umbrella pole and a plurality of umbrella ribs and struts extending therefrom, according to one embodiment.

(3) FIG. 2 is a top perspective view of an assembly including a hub and a rib.

(4) FIG. 3 is a top view of an upper portion of a hub of the assembly of FIG. 2.

(5) FIG. 4A is an enlarged perspective cross-section view of an assembly including the hub and the rib of FIG. 2 taken through section plane 4A-4A shown in FIG. 2.

(6) FIG. 4B is a detail view of an annular bearing zone of one embodiment of the hub of FIG. 2.

(7) FIG. 5 is a plan view of an assembly step involving the hub and the rib of FIG. 2, the rib being assembled with the hub at a non-operational orientation of the rib.

(8) FIGS. 6A-6B show a lower portion of an umbrella hub of the assembly of FIG. 2 illustrating a pulley retention zone.

(9) FIG. 6C is a perspective view of a pulley device used with the assembly of FIG. 2.

(10) FIG. 6D is an exploded view of an assembly including the pulley device of FIG. 6C and the hub portion illustrated in FIGS. 6A-6B.

(11) FIGS. 7A-7B are top and bottom perspective views of an upper portion of an umbrella hub of the assembly of FIG. 2 showing locking members and trapping members thereof.

(12) FIGS. 8A-8C show one embodiment of an inner end of components of the rib of FIG. 2 in three assembly states.

(13) FIGS. 9A-9E show components of a rib retention member of the umbrella hub and rib assembly of FIG. 2.

(14) FIG. 9F shows the rib retention member of FIG. 2 in an assembled state with the rib removed to clarify the connection between a projection and a recess thereof.

(15) FIG. 10 shows a side view of a rib retention member of the umbrella hub and rib assembly of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(16) While the present description sets forth specific details of various embodiments, it will be appreciated that the description is illustrative only and should not be construed in any way as limiting. Furthermore, various applications of such embodiments and modifications thereto, which may occur to those who are skilled in the art, are also encompassed by the general concepts described herein. Each and every feature described herein, and each and every combination of two or more of such features, is included within the scope of this application provided that the features included in such a combination are not mutually inconsistent.

(17) In accordance with embodiments described herein, there are provided various configurations of a hub and hub assembly that can be used with an umbrella support structure, such as an umbrella frame or pavilion frame, to facilitate the rapid and secure fastening of structural ribs with a hub or other structure. As described in greater detail herein, the hub and hub assembly can incorporate various features such that a secure connection between an umbrella rib and a hub of an umbrella frame can be obtained. Additional details and features of related umbrella rib connectors and assemblies are illustrated and described in Applicant's U.S. Pat. No. 7,703,464, issued Apr. 27, 2010, entitled Quick Connector for Shade Structure, the entirety of the contents of which is incorporated herein by reference.

(18) FIG. 1 shows an umbrella assembly 100 that includes umbrella hub assemblies 116, 120. The umbrella hub assemblies 116, 120 are configured for excellent manufacturability and also for efficient use of components, such as reducing the number of components. The umbrella assembly 100 includes a lower hub 116. The umbrella assembly 100 also includes an upper hub 120. Although the description herein is primarily directed to the umbrella hub assembly 120 it is to be understood that features of the umbrella hub assembly 120 can also be used or provided with the lower hub 116 (as discussed below) or with intermediate hubs (not shown) disposed between an upper hub and a lower hub.

(19) FIG. 1 also shows that that the umbrella assembly 100 can include a plurality of structural members, e.g., including ribs 108 and struts 112. Each of the ribs 108 has an inner end 108A, an outer end 108B, and a body extending along a longitudinal axis therebetween. The inner end 108A has a transverse pivot member 440, which can be a rib retention member 728, (see FIGS. 9A to 9E) that extends away from the longitudinal axis. Details of the inner end 108A and the pivot member 440 are shown throughout, for example in FIGS. 5, 8A-8C, and 9A-9E and are discussed further below.

(20) FIG. 4A-4B show that the pivot member 440 can be disposed in an annular bearing zone 412 of the umbrella hub 120. FIG. 2 also shows that the umbrella rib 108 is attached to the hub 120. The pivot member 440 enables the rib 108 to pivot relative to the hub 120. The hub 120 can further comprise an upper portion 508 and a lower portion 512. The upper and lower portions 508, 512 are disposed about a passage 416. The upper and lower portions 508, 512 can extend generally symmetrically outward from the passage 416. The passage 416 can be configured to be disposed about an umbrella pole 104. The upper portion 508 can include a top surface 232 that extends between the passage 416 and an outer periphery 520 of the hub 120. The lower portion 512 can include a bottom surface 240 that extends between the passage 416 and the outer periphery 520 of the hub 120.

(21) The rib 108 has an elongate body 484 that can be coupled with the pivot member 440. The elongate body 484 can have a longitudinal axis 424 that extends between an inner end 108A and an outer end 108B. An inner portion 256 of the elongate body 484 disposed adjacent to the inner end 108A can be disposed in a groove 428 of the hub 120. The inner portion 256 can comprise an aperture 740, as shown in FIGS. 8A-8B. The hub 120 can include a rib engagement section 276. There may be a plurality of rib engagements sections 276b disposed symmetrically about the hub 120. The rib engagement section 276 can comprise a groove 428 that extends radially inwardly from the outer periphery 520 and an annular bearing zone 412. In the illustrated embodiment, a first annular bearing zone 412A is disposed on a first side 428A of the groove 428 and a second annular bearing zone 412B is disposed on a second side 428B of the groove 428.

(22) FIG. 4A shows free ends 480A, 480B of the pivot member 440 pivotably attached to the hub 120. FIG. 4B shows the structure of the annular bearing zone 412 according to one embodiment. An annular bearing zone 412 can be disposed on each side of the groove 428. In some embodiments, the annular bearing zone 412 can be disposed on either side of the groove 428. The annular bearing zone 412 can have an outward surface 432 and an inward surface 436. The annular bearing zone 412 can be configured to support the pivot member 440 of the umbrella rib 108. The annular bearing zone 412 can comprise a protrusion 444. The protrusion 444 can comprise a support surface 448 disposed in the groove 428. The inward surface 436 can be disposed on the protrusion 444 that extends toward the groove 428. The protrusion 444 can have a major dimension 452 and a minor dimension 456. In some embodiments, a protrusion 444 can be disposed on each of the two opposing sides of the groove 428, and the pivot member 440 can comprise first and second free ends 480A, 480B. Each of the two free ends 480A. 480B can comprise a recess 476 configured to receive a corresponding protrusion 444 of the annular bearing zone 412.

(23) The free ends 480A, 480B can be disposed away from the elongate body 484 of the rib 108. The free ends 480A, 480B can also include an assembly access portion 492. The assembly access portion 492 can comprise a width 524 less than the major dimension 452 and greater than the minor dimension 456 of the protrusion 444.

(24) As shown in FIG. 5, the hub 120 and the pivot member 440 can be configured such that the access portion 492 shown in FIGS. 4A, 9A, and 10 faces the protrusion 444 when the pivot member is being inserted into the hub 120 at a direction of insertion 496. The direction of insertion 496 can comprise a direction along an axis along which the rib member 108 can be assembled to the hub 120. The rib member 108 can be configured to be at a non-operational orientation during insertion. FIG. 4B shows that the hub 120 can include an access path 516. The access path 516 is a path along which the retention member 728 of the rib 108 is moved in connecting the rib 108 to the hub 120. The access path 516 can face away and generally opposite from the direction of insertion 496. The orientation of the access path 516 can correspond to a non-operational orientation that is provided for assembly of these components. A non-operational orientation for assembly can be provided when the assembly access portion 492 is aligned with the access path 516.

(25) The pivot member 440 can be disposed in the annular bearing zone 412 with an inward surface 438 of the pivot member 440 facing, adjacent to, and/or engaging the inward surface 436 of the annular bearing zone 412 and an outward surface 446 of the pivot member 440 facing, adjacent to, and/or engaging an outward surface 432 of the annular bearing zone 412. This configuration provides two sets of annular interfaces between the pivot member 440 and the hub 120 which provides for smooth pivoting of the rib 108 in the hub 120.

(26) Pulley Mounting Zone

(27) FIGS. 6A-6B show that the umbrella hub 120 can comprise a pulley mounting zone 600. The pulley mounting zone 600 can be disposed in the lower portion 512 of the hub 120. The pulley mounting zone 600 can be accessible from the outer periphery 520 when the upper portion 508 is separated from the lower portion 512. As shown in FIG. 7, the upper portion 508 can comprise a trapping member 604 projecting away from a lower surface of the upper portion 508. When assembled such that the upper portion 508 is coupled with the lower portion the trapping member 604 projects into the lower portion 512. A pulley 648 shown in FIG. 6C can be disposed in the pulley mounting zone 600. In some embodiments, the pulley mounting zone 600 can be disposed in the upper portion 508 of the hub 120, while the trapping member 604 can project from the lower portion 512 toward the upper portion 508.

(28) The trapping member 604 of the upper portion 508 can be advanceable into a trapping position. In the trapping position, the pulley 648 disposed in the pulley mounting zone 600 can be prevented from coming out of the pulley mounting zone 600. The trapping member 604 can be in the trapping position when the upper portion 508 is assembled to the lower portion 512. The lower portion 512 can comprise a trapping slot 608 and in some cases a plurality of, e.g., two, slots configured to accept and align the trapping member 604. The trapping member 604 can comprise a plurality of, e.g., two projections. In some embodiments, the trapping slot 608 can be disposed in the upper portion 508 instead of the lower portion 512. In an assembled state, the two protections can extend across a horizontal plane extending between the pulley 648 and the outer periphery 520, the two projections disposed between the pulley 648 and the outer periphery 520 of the hub 120. Thus, the trapping members 604 prevent the pulley from being dislodged laterally or radially out of the hub 120 when the upper and lower hub portions 508, 512 are assembled.

(29) FIG. 6C shows the pulley 648 comprising a wheel member 624 and a bearing member 628. The wheel member 624 can comprise a radius and the bearing member 628 can be disposed on or near the center of the wheel member 624. The bearing member 628 of the pulley 648 can comprise a tapered structure 629. The tapered structure 629 can be used to align the wheel member 624 with the pulley mounting zone 600 and facilitate the rotation of the pulley 648 during operation. The tapered structure 629 can comprise an inner end 631 and an outer end 630, the inner end connected to the center of the wheel member 624 and the outer end 630 disposed away from the center of the wheel member 624. The outer end 630 of the tapered structure 629 can comprise a diameter greater than diameter of the inner end 631.

(30) The pulley mounting zone 600 can comprise a wheel slot structure 636 and a bearing slot structure 640. The wheel slot structure 636 can be shaped and sized to accept the wheel member 624 of the pulley 648. The wheel slot structure 636 can comprise a wheel slot dimension 644 extending parallel to longitudinal axis of the passage 416. The bearing slot structure 640 can be shaped and sized to accept the bearing member 628 from the outer periphery 520 towards the passage 416 and can extend transversely from the wheel slot dimension 644. The dimension 644 of the wheel slot can be greater than two times the radius 632 of the wheel member 624. The two projections of the trapping member 604 can be configured to trap the bearing member 628 and not the wheel member 624.

(31) FIG. 6D shows the pulley 648 separated from the pulley mounting zone 600. The pulley 648 can be inserted into the pulley mounting zone 600 in one assembly method as described herein. The structure can be on the lower portion 512. So, the pulley 648 can be inserted on the lower portion 512. The bearing slot portion 640 can comprise a mating tapered structure 641. The mating tapered structure 641 can comprise an inner end 642 and an outer end 643. Each of the inner and outer ends 642, 643 of the mating tapered structure 641 can mate with the inner and outer ends 631, 630 of the tapered structure 629 of the pulley 648 during insertion of the pulley 648 to the pulley mounting zone 600, thereby aiding the alignment of the pulley 648 to the pulley mounting zone.

(32) The upper portion 508 can be aligned with the lower portion 512 such that the trapping member 604 located between the outer periphery 520 and the passage 416 is aligned with the trapping slot 608. The trapping member 604 of the upper portion 508 can be inserted through the trapping slot 608 and into the pulley mounting structure 600. The trapping slot 608 can be disposed near the pulley mounting zone 600, e.g. directly above the bearing slot structure 640 as shown in FIG. 6B. Further coupling of the lower portion 512 of the hub 120 to the upper portion 508 moves the trapping member 604 to a trapping position, e.g., one where the trapping member 604 is disposed between the outer periphery 520 and the bearing member 628. Once in a trapping position, the trapping member 604 can prevent the pulley 648 from being inadvertently removed from the hub 120 during operation while permitting rotation of the pulley 648.

(33) Rib Retention Member

(34) FIG. 8A shows that the aperture 740 can be disposed on the inner portion 256 of the elongate body 484 of the rib 108. As shown in FIG. 8C, the inner portion 256 can comprise a retention member 728. The retention member 728 can comprise the pivot member 440 having free ends 480A, 480B and a central portion 800. The central portion 800 is shown without the pivot member 440 in FIG. 9C, and FIG. 8B and is shown coupled with the pivot member 440 without the elongate body 848 in FIG. 9F.

(35) FIGS. 9A-9C show that the retention member 728 can comprise the central portion 800, a first lateral portion 720, and a second lateral portion 724. The central portion 800 can comprise a cap 656 and a projection 660 that is insertable into the elongate body 484. The projection 660 can further comprise retention structures 806 and a central portion aperture 664. The first free end 480A can be disposed away from the central portion 800 and can have a first recess 476A formed therein. The second free end 480B can be disposed opposite the first free end 480A and away from the central portion 800. The second free end 480B can have a second recess 476B formed therein.

(36) As shown in FIG. 9F, the first and second lateral portions 720, 724 can be advanced through or into the aperture 664 disposed on the central portion 800. The first and second lateral portions 720, 724 can be joined in the aperture 664. The first lateral portion 720 and the second lateral portion 724 can be joined through the apertures 664, 740 of the central portion and the elongate body 484. As shown in FIGS. 9D-9E, the first lateral portion 720 can comprise a projection 672. The second lateral portion 724 can comprise a recess 676. The recess 676 of the second lateral portion 724 can be configured to receive the projection 672.

(37) The pivot member 440 can comprise a locking member 684 to secure the projection 672 in the recess 676. The locking member 684 can comprise a deflectable member 684. The locking member 684 can have a deflectable surface 688. The deflectable surface 688 can move to a low profile position during insertion of the projection 672 into the recess 676. The surface 688 of the locking member 684 can move to a high profile position when the projection 672 is fully inserted. When in the high profile position, the disengagement of the first lateral portion 720 from the second lateral portion 724 can be prevented.

(38) The deflectable locking member 684 can comprise a resiliently mounted structure. That is the locking member 684 can be deflected and can return to a free state (e.g., an undeflected state) when not deflected. The locking member 684 can be disposed on the projection 721 of the first lateral portion 720. The second lateral portion 724 can comprise an aperture 692 sized to permit the deflectable locking member 684 to move such that the surface 688 is in the high profile position. The deflectable locking member 684 can be at least partially received in the aperture 692 with the surface 688 abutting an edge of the aperture 692.

(39) FIG. 10 shows a side view of the free end 480B of the pivot member 440. The pivot member 440 can comprise an outer periphery. The outer periphery of the pivot member can comprise a circular portion 704 disposed at opposite ends thereof and a non-circular portion 708 disposed between the circular portions 704. The non-circular portion 708 can be separated from each other by a distance 714 less than two times the radius 716 of the circular portion 704. The recess 476 can comprise a diameter 736. The diameter 736 can be greater than the width 524 of the assembly access portion 492.

(40) Method of Assembly

(41) As shown in FIG. 5, the rib 108 can be coupled with the hub 120 at a non-operational angle relative to the hub 120. The non-operational orientation can comprise an angle 580 or a range of angles disposed between the longitudinal axis 424 of the rib 108 and the longitudinal axis 584 of the passage 416. For example, the non-operational orientation of the rib 108 connected to the hub 120 can comprise angles 580 of the rib axis 424 relative to the passage axis 584 of between about 90 degrees to about 180 degrees from the longitudinal axis of the passage 584, in the direction of the upper hub 508. In some embodiments, the angle 580 in the non-operational orientation can be between about 110 degrees to about 170 degrees, including the foregoing values and ranges bordering therein. In some embodiments, the non-operational orientation can be one in which the outer end 108B of the rib 108 is disposed at an elevation above a horizontal plane intersecting the hub 120.

(42) The rib 108 can be positioned adjacent to a groove 428 of the hub 120. A relative movement can be provided between the rib 108 and the hub 120 in a direction of insertion as indicated by the arrow 496, e.g., upward and laterally toward the passage 416 such that the pivot member 440 is disposed in the groove 428. In the case of the lower hub 116, the movement would be in a direction of insertion, e.g., downward and laterally toward a passage corresponding to the passage 416. The pivot member 440 can mate with one or more structures on or in the groove, such as the protrusion(s) 444. The direction of insertion 496 can be at an angle from the longitudinal axis 424 of the rib 108. The rib 108 can be pivotably coupled with the hub 120, for example, by rotating the rib 108 beyond the non-operational angle 580, e.g., into any angle in an operational range.

(43) The rib 108 can be decoupled from the hub 120 at a non-operational orientation. A user can rotate the rib 108 such that the longitudinal axis of the rib 424 is at an angle 580 from the longitudinal axis 584 of the rib 108. The rib 108 can be decoupled from the hub 120 by moving the rib 108 at a direction opposite the direction of insertion 496. Because the rib 108 will not be at the non-operational configuration during use there is no risk of the rib inadvertently being disconnected. Also, the rib 108 is joined to the hub 120 when the hub is fully assembled without requiring fasteners to be used to secure the connection of components of the hub after the ribs are coupled to the hub.

(44) As shown in FIG. 5, the groove 428 can comprise a width 588 between two opposing walls 460, 464. The assembly access path 516 formed on the two opposing walls 460, 464 can comprise a distance 592 between assembly access paths 516 greater than the distance 588 between the two opposing walls 460, 464. The protrusions 444 on the two opposing walls 460, 464 can comprise a distance between protrusions 596, the distance between protrusions 596 being greater than the groove wall distance 588 but less than the distance between the access paths 592. The access path 516 can be disposed on the lower portion 512.

(45) Although these inventions have been disclosed in the context of certain preferred embodiments and examples, it will be understood by those skilled in the art that the present inventions extend beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the inventions and obvious modifications and equivalents thereof. In addition, while several variations of the inventions have been shown and described in detail, other modifications, which are within the scope of these inventions, will be readily apparent to those of skill in the art based upon this disclosure. It is also contemplated that various combination or sub-combinations of the specific features and aspects of the embodiments may be made and still fall within the scope of the inventions. It should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the disclosed inventions. Thus, it is intended that the scope of at least some of the present inventions herein disclosed should not be limited by the particular disclosed embodiments described above.