Patent Publication Number: US-2022219886-A1

Title: Collapsible cargo container assembly

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage application, filed under 35 U.S.C. § 371, of International Patent Application No. PCT/IB2020/058071, filed on Aug. 28, 2020, which claims the benefit of U.S. Provisional Application No. 62/893,550, filed Aug. 29, 2019, the entireties of which are incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates generally to a collapsible cargo container assembly. 
     BACKGROUND OF THE INVENTION 
     For a number of reasons collapsible containers have advantages over normal containers, for example, because of lower volume in storage or while shipping them to a different location while empty (by air or by road trucking). Collapsible containers (also called foldable containers or foldable collapsible unit load devices (ULD&#39;s) exist but there are several downsides to the use and operation of the existing products. Current designs are often heavy, not watertight, hard to fold/unfold and fragile during operation. Stacking and storing can be time consuming and because of the folded footprint the actual space saving is often not advantageous. These downsides make them unpopular with airline operators and therefore, few operators use them. 
     In the present invention, the method of folding is different than prior devices. The present invention is user friendly, preferably water tight, more robust, lighter and the folded footprint is preferably less than the prior art. Although the smaller footprint is not a limitation on the present invention and the footprint can be the same as or more than the prior art. The design is also optimized for storing the folded units more efficiently. 
     The background description disclosed anywhere in this patent application includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art. 
     SUMMARY OF THE PREFERRED EMBODIMENTS 
     In accordance with a first aspect of the present invention there is provided a collapsible container assembly that includes a first lateral side wall having a door frame and a first shear wall, a second lateral side wall that opposes the first lateral side wall and includes a wall panel and a second shear wall, an outboard wall that includes upper and lower panels that are pivotably connected to one another, an inboard wall that opposes the outboard wall and includes upper and lower panels that are pivotably connected to one another, a base and a top. The first shear wall is pivotable between a use position where the first shear wall is not positioned in the door frame interior and a stowed position where the first shear wall is positioned in the door frame interior. The second shear wall is pivotable between a use position where the second shear wall is not positioned in the wall panel interior and a stowed position where the second shear wall is positioned in the wall panel interior. The door frame, wall panel, inboard wall and outboard wall are pivotably connected to the base, and the inboard wall and outboard wall are pivotably connected to the top. 
     In a preferred embodiment, the first shear panel is pivotable 180° between the use position and the stowed position, and the second shear panel is pivotable 180° between the use position and the stowed position. Preferably, the door frame together with the first shear panel is pivotable between a vertical use position and a horizontal stowed position, and the wall panel together with the second shear panel is pivotable between a vertical use position and a horizontal stowed position. In a preferred embodiment, the outboard wall is pivotable between a use position and a stowed position where the upper panel is positioned above the lower panel. Preferably, the inboard wall is pivotable between a use position and a stowed position where the upper panel is positioned above the lower panel. Preferably, the when the collapsible container assembly is in the collapsed position, the top is positioned above the upper panels of the inboard and outboard walls. 
     In a preferred embodiment, the pivotable connection between the outboard wall and the base comprises a bottom hinge assembly that includes a hinge rod that defines a hinge rod axis. The outboard wall is pivotable between a use position, a stowed position and an assembly position. In the assembly position the outboard wall is slidable in a direction that is parallel with the hinge rod axis. Preferably, the bottom hinge assembly includes a hinge portion associated with one of the base and the outboard wall and a knuckle portion associated with the other of the base and the outboard wall. Preferably, the knuckle portion includes a plurality of spaced apart C-shaped knuckle members that each include a channel defined therein and the C-shaped knuckle members define a knuckle opening. Preferably, the hinge portion includes a first extension member that extends upwardly from the base or downwardly from the outboard wall, a second extension member extending outwardly from the first extension member and the hinge rod on a distal end of the first extension member. A plurality of knuckle receiving openings are defined in the first and second extension members. The hinge rod is received in the knuckle openings. When the outboard wall is in the assembly position the channels defined in the plurality of knuckle members are aligned with the second extension members, such that the second extension members can be received in and slid along the channels when the outboard wall is slid off, removed from or disassembled from the base. 
     In a preferred embodiment, the first shear panel is pivotably connected to the door frame at a position in the door frame interior. The pivotable connection between the first shear panel and the door frame includes a hinge member associated with one of the first shear panel and the door frame and a hinge pin associated with the other of the first shear panel and the door frame. A connection member extends outwardly from the hinge member and connects to the first shear panel (a frame member thereof). The door frame includes top, bottom, left and right frame members. A clearance recess is defined by the hinge member, the connection member and a (proximal or rotating) frame member of the first shear panel. In the use position, the left frame member of the door frame is received in the clearance recess and in the stowed position, the left frame member of the door frame is not received in the clearance recess. 
     In a preferred embodiment, the first shear panel includes a proximal frame member (the rotating frame member) and a distal frame member (that moves in an arc between the use and stowed positions). The distal frame member includes a vertically extending tab and an adjacent vertically extending recess. The upper panel of the outboard wall includes a plurality of frame members and at least one of the frame members includes a vertically extending tab and an adjacent vertically extending recess. When the first shear panel is in the use position, the vertically extending tab of the first shear panel is received in the vertically extending recess of the upper panel of the outboard wall and the vertically extending tab of the upper panel of the outboard wall is received in the vertically extending recess of the first shear panel to secure the first shear panel to the outboard wall. The vertically extending tabs may contact one another and be displaced via a rounded or inclined surface when the first shear panel is moved to the use position. 
     In a preferred embodiment, in the collapsed position a footprint of the collapsible container assembly is defined by a footprint of the top. In other words, the length and width of the top is the length and width of the entire container assembly when in the collapsed position. 
     In accordance with another aspect of the present invention there is provided a method of collapsing a container assembly from a use position to a collapsed position. The method includes obtaining the container assembly. The container assembly includes opposing first and second lateral walls, opposing inboard and outboard walls, a top and a bottom. The outboard wall includes an upper panel pivotably connected to a lower panel, the inboard wall includes an upper panel pivotably connected to a lower panel, the outboard wall is pivotably connected to the top and to the base, and the inboard wall is pivotably connected to the top and to the base. The method also includes pivoting a first shear wall of the first lateral side wall from a use position to a stowed position (this is preferably about a vertical axis). In the stowed position the first shear wall is received in a door frame interior of a door frame of the first lateral side wall. The method also includes pivoting a second shear wall of the second lateral side wall from a use position to a stowed position (this is preferably about a vertical axis). In the stowed position the second shear wall is received in a wall panel interior of a wall panel of the second lateral side wall. The method also includes pivoting the door frame together with the first shear wall downwardly from a use position to a stowed position (this is preferably about a horizontal axis), pivoting the wall panel together with the second shear wall downwardly from a use position to a stowed position (this is preferably about a horizontal axis), pivoting the outboard wall downwardly from a use position to a stowed position where the upper panel is positioned above the lower panel, and pivoting the inboard wall downwardly from a use position to a stowed position where the upper panel is positioned above the lower panel. 
     In a preferred embodiment, the pivotable connection between the inboard wall and the base includes a horizontally extending hinge rod that defines a hinge rod axis. The method may include pivoting the inboard wall to an assembly position and sliding the inboard wall in a direction parallel to the hinge rod axis. 
     In accordance with another aspect of the present invention there is provided a collapsible container assembly that includes first and second opposing lateral side walls, inboard and outboard opposing lateral side walls, and a top and a bottom. The first and second opposing lateral side walls, inboard and outboard opposing lateral side walls, top and bottom cooperate to define a container interior. The first lateral side wall (and/or the first shear panel, which is part of the first lateral wall) is pivotable with respect to the inboard wall. The first lateral side wall includes a first frame member and the inboard wall includes a second frame member. The first frame member includes a first vertically extending tab and an adjacent first vertically extending recess, wherein the second frame member includes a second vertically extending tab and an adjacent second vertically extending recess. The first vertically extending tab is received in the second vertically extending recess and the second vertically extending tab is received in the first vertically extending recess. In a preferred embodiment, the second frame member includes an extension portion, and the second tab is positioned on the extension portion. In a preferred embodiment, a liquid path is defined between the first frame member and the second frame member. The liquid path extends through a path entrance, a first U-shaped channel, a second U-shaped channel that faces in a direction opposite the first U-shaped channel, an extended portion defined between the first and second frame members and a path exit that communicates with the container interior. Preferably, the first and second U-shaped channels include a common arm. This liquid path provides liquid or water resistance. The liquid path is also preferably defined between the inboard wall and the second lateral wall (and/or the second shear panel), the outboard wall and the second lateral wall (and/or the second shear panel) and the outboard wall and the first lateral wall (and/or the first shear panel). 
     In accordance with another aspect of the present invention there is provided a collapsible container assembly that includes first and second opposing lateral side walls, inboard and outboard opposing lateral side walls, a top and a bottom, and a bottom hinge assembly that pivotably connects the inboard wall and the bottom. The first and second opposing lateral side walls, inboard and outboard opposing lateral side walls, top and bottom cooperate to define a container interior. The bottom hinge assembly includes a hinge rod that defines a hinge rod axis. The outboard wall is pivotable between a use position, a stowed position and an assembly position. In the assembly position the outboard wall is slidable in a direction that is parallel with the hinge rod axis. 
     The present invention is a foldable cargo container that is designed to provide a better return ratio than the prior art. The present invention also may improve on one or more of the following compared to the prior art: footprint, stackability, weight and water resistance. 
     In use, by folding the front and the back of the container inwardly onto the pallet, the remainder of the ULD can be folded downwardly. Therefore, in a preferred embodiment, the actual footprint of the container is the roof or top itself. This also creates a surface on which another foldable container can be stacked. The front and the back of the ULD are designed in a way that the shear panels self-cross into the forward and aft panels. Interlocking extrusions that grab into each other when extreme loads occur but also ensure stability of the container help provide water resistance and withstand certification loads. These features help minimize the folded footprint, but at the same time improve the water tightness, provide for a sturdy and easy to operate unit that is efficient when shipped folded. The integrated hinges used on at least a portion of the extrusions also provide better water tightness than conventional hinge constructions, while providing excellent stability and strength at a low weight. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention may be more readily understood by referring to the accompanying drawings in which: 
         FIG. 1  is a perspective view of a collapsible cargo container assembly in accordance with a preferred embodiment of the present invention; 
         FIG. 2  is another perspective view of the container assembly of  FIG. 1  from the other side; 
         FIG. 3  is a perspective view of the container assembly with the door removed; 
         FIG. 4  is a perspective view of the container assembly with the first shear panel partially folded inwardly and the top removed; 
         FIG. 5  is a perspective view of the container assembly with the first shear panel folded to the stowed position, the door frame partially folded downwardly and the top removed; 
         FIG. 6  is a perspective view of the container assembly with the door frame folded downwardly to the stowed position; 
         FIG. 7  is a perspective view of the container assembly with the second shear panel partially folded inwardly and the top removed; 
         FIG. 8  is a perspective view of the container assembly with the second shear panel folded to the stowed position and the wall panel partially folded downwardly; 
         FIG. 9  is a perspective view of the container assembly with the wall panel folded downwardly to the stowed position; 
         FIG. 10  is a perspective view of the container assembly with the outboard wall partially folded downwardly; 
         FIG. 11  is a perspective view of the container assembly with both the inboard and outboard walls folded to the stowed position and the entire container assembly in the collapsed position; 
         FIG. 12  is a perspective view of the first lateral wall with the first shear wall in the use position; 
         FIG. 13  is a cross-sectional view taken along line  13 - 13  of  FIG. 12 ; 
         FIG. 14  is a perspective view of the first lateral wall with the first shear wall partially folded inwardly; 
         FIG. 15  is a cross-sectional view taken along line  15 - 15  of  FIG. 14 ; 
         FIG. 16  is a perspective view of the first lateral wall with the first shear wall in the stowed position; 
         FIG. 17  is a cross-sectional view taken along line  17 - 17  of  FIG. 16 ; 
         FIG. 18  is a cross-sectional perspective view showing how the door frame is secured to the inboard wall; 
         FIG. 19  is a cross-sectional view showing how the door frame is secured to the inboard wall; 
         FIG. 19A  shows the path between adjacent frame members having a pivotable connection therebetween that water or other liquid must traverse to enter the container interior from the outside; 
         FIG. 20  is a cross-sectional perspective view showing the door frame partially folded downwardly from the inboard wall; 
         FIG. 21  is a cross-sectional view of the container assembly in the position shown in  FIG. 10 ; 
         FIG. 22  is a cross-sectional view taken from the lower left corner of  FIG. 21  showing the bottom hinge assembly and the lower panel of the outboard wall partially folded; 
         FIG. 23  is a cross-sectional view taken from the lower right corner of  FIG. 21  showing the bottom hinge assembly and the lower panel of the inboard wall in the use or erect position; 
         FIG. 24  is a cross-sectional view showing the lower left corner of  FIG. 21  with the bottom hinge assembly and the lower panel of the inboard wall in the collapsed or folded position; 
         FIG. 25  is a perspective view of the bottom hinge assembly that connects the lower panel of the outboard wall to the bottom  16  and showing the lower panel exploded from the hinge portion; 
         FIG. 26  is a cross-sectional view showing the lower left corner of  FIG. 21 , but with the lower panel of the outboard wall in the sliding or assembly position; and 
         FIG. 27  is a perspective view of a plurality of container assemblies in a stacked position. 
     
    
    
     Like numerals refer to like parts throughout the several views of the drawings. 
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following description and drawings are illustrative and are not to be construed as limiting. Numerous specific details are described to provide a thorough understanding of the disclosure. However, in certain instances, well-known or conventional details are not described in order to avoid obscuring the description. References to one or an embodiment in the present disclosure can be, but not necessarily are references to the same embodiment; and, such references mean at least one of the embodiments. If a component is not shown in a drawing then this provides support for a negative limitation in the claims stating that that component is “not” present. However, the above statement is not limiting and in another embodiment, the missing component can be included in a claimed embodiment. 
     Reference in this specification to “one embodiment,” “an embodiment,” “a preferred embodiment” or any other phrase mentioning the word “embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the-disclosure and also means that any particular feature, structure, or characteristic described in connection with one embodiment can be included in any embodiment or can be omitted or excluded from any embodiment. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Moreover, various features are described which may be exhibited by some embodiments and not by others and may be omitted from any embodiment. Furthermore, any particular feature, structure, or characteristic described herein may be optional. Similarly, various requirements are described which may be requirements for some embodiments but not other embodiments. Where appropriate any of the features discussed herein in relation to one aspect or embodiment of the invention may be applied to another aspect or embodiment of the invention. Similarly, where appropriate any of the features discussed herein in relation to one aspect or embodiment of the invention may be optional with respect to and/or omitted from that aspect or embodiment of the invention or any other aspect or embodiment of the invention discussed or disclosed herein. 
     The terms used in this specification generally have their ordinary meanings in the art, within the context of the disclosure, and in the specific context where each term is used. Certain terms that are used to describe the disclosure are discussed below, or elsewhere in the specification, to provide additional guidance to the practitioner regarding the description of the disclosure. For convenience, certain terms may be highlighted, for example using italics and/or quotation marks: The use of highlighting has no influence on the scope and meaning of a term; the scope and meaning of a term is the same, in the same context, whether or not it is highlighted. 
     It will be appreciated that the same thing can be said in more than one way. Consequently, alternative language and synonyms may be used for any one or more of the terms discussed herein. No special significance is to be placed upon whether or not a term is elaborated or discussed herein. Synonyms for certain terms are provided. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and is not intended to further limit the scope and meaning of the disclosure or of any exemplified term. Likewise, the disclosure is not limited to various embodiments given in this specification. 
     Without intent to further limit the scope of the disclosure, examples of instruments, apparatus, methods and their related results according to the embodiments of the present disclosure are given below. Note that titles or subtitles may be used in the examples for convenience of a reader, which in no way should limit the scope of the disclosure. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. In the case of conflict, the present document, including definitions, will control. 
     It will be appreciated that terms such as “front,” “back,” “top,” “bottom,” “side,” “short,” “long,” “up,” “down,” “aft,” “forward,” “inboard,” “outboard” and “below” used herein are merely for ease of description and refer to the orientation of the components as shown in the figures. It should be understood that any orientation of the components described herein is within the scope of the present invention. 
     Referring now to the drawings, which are for purposes of illustrating the present invention and not for purposes of limiting the same, the drawings show a collapsible cargo container assembly  10 . As shown in  FIGS. 1-10 , the container assembly  10  generally includes a series of panels, some of which include hinges therebetween that allow the container assembly  10  to be folded and unfolded between a use position or configuration and a collapsed position or configuration. 
     In a preferred embodiment, as shown in  FIGS. 1-3 , the container assembly  10  includes a door  12 , a top  14 , a base  16 , an inboard side or wall  18 , an outboard side or wall  20 , a first lateral side or wall  22  and a second lateral side or wall  24 . In a preferred embodiment, the door  12  is positioned on the first wall  22 . However, the door  12  can be positioned on any of the other walls. The door  12  preferably is secured to a door frame  25  that defines a door opening  26 . 
     The inboard wall  18  includes upper and lower panels  28  and  30  that are hingedly or pivotably secured to one another by one or more hinges  32  or other pivotable connection. The outboard wall  20  includes upper and lower panels  34  and  36  that are hingedly or pivotably secured to one another by one or more hinges  32  or other pivotable connection. In a preferred embodiment, the lower panel  36  of the outboard wall  20  angles inwardly (i.e., is not vertical) to provide efficiency for when it is positioned in the cargo hold of an aircraft. The first lateral side wall  22  includes the door  12  and a first shear panel  38 . The second lateral side wall  24  includes a wall panel  40  and a second shear panel  42 . The container assembly  10  also preferably includes a plurality of posts, frame members or extrusions (described more fully below), corner brackets  46  and similar hardware to secure the panels and walls together. All of the frame members of the various panels are referred to herein as a frame member  44 . 
       FIGS. 1-11  show the preferred steps for folding or collapsing the container assembly  10  from the use position and the collapsed position.  FIG. 1  shows the container assembly  10  in the use position. As shown in  FIG. 3 , first, the door  12  is removed. As shown in  FIG. 4 , next, the first shear panel  38  is folded inwardly from the use position ( FIG. 3 ) to the stowed position ( FIGS. 5 and 16 ).  FIG. 4  shows the first shear panel  38  partially folded inwardly. In the stowed position, the first shear panel  38  is received in the door frame  25 . 
     Next, as shown in  FIGS. 5-6 , the door frame  25  (together with the first shear panel  38 ) is folded downwardly from the use position to the stowed position ( FIG. 6 ). Next, as shown in  FIG. 7 , the second shear panel  42  is folded inwardly from the use position ( FIG. 2 ) to the stowed position ( FIG. 8 ). In the stowed position, the second shear panel  42  is received in the wall panel  40 . Next, as shown in  FIGS. 8-9 , the wall panel  40  (together with the second shear panel  42 ) is folded downwardly from the use position to the stowed position ( FIG. 9 ). Next, as shown in  FIGS. 10 and 11 , the inboard and outboard walls  18  and  20  are folded inwardly (only the outboard wall  20  is show being folded in  FIG. 10 ) and downwardly to the collapsed position. During this step, the top wall  14  moves downwardly and the upper and lower panels  28  and  30  of the inboard wall  18  and the upper and lower panels  32  and  34  outboard walls of the outboard wall  20  hinge or pivot with respect to one another so that the upper panels are stacked on top of the lower panels. In the collapsed position, as shown in  FIG. 10  (also see  FIG. 24 ), the top wall is stacked on or positioned above the upper panels, the upper panels are stacked on or positioned above the lower panels, the lower panel of the outboard wall is stacked on or positioned above the second shear panel, the second shear panel is stacked on or positioned above the first shear panel, and the first shear panel is stacked on or positioned above the base. 
       FIGS. 12-17  demonstrate how the first lateral wall  22  folds such that the first shear panel  38  moves from the use position to the stowed position.  FIGS. 12 and 13  show the first shear panel  38  in the use position.  FIGS. 14 and 15  show the first shear panel  38  partially hinged or folded between the use and stowed positions.  FIGS. 16 and 17  show the first shear panel  38  in the stowed position. The door frame  25  includes a plurality (top, bottom left and right) of frame members  44  that define a door frame interior  25   a . In a preferred embodiment, to save or reduce height when the container assembly is in the collapsed position and when the first shear panel  38  is in the stowed position, the first shear panel  38  hinges or pivots into the door frame interior  25   a , as shown in  FIGS. 16 and 17 . As shown in  FIGS. 13, 15 and 17 , the first shear panel  38  includes a hinge member  48  that hinges or pivots on a hinge pin  48   a  associated with the door frame (the hinge pin and hinge member can be reversed so that the hinge pin is on the first shear panel and the hinge member is on the door frame. In a preferred embodiment, a connection member  49  extends outwardly from the hinge member  48  and connects to the first shear panel  38  (the frame member  44  thereof). As shown in  FIG. 13 , the hinge member  48 , connection member  49  and frame member  44  of the first shear panel  38  define a clearance recess  51  that receives the adjacent frame member  44  (in  FIG. 13 , the left frame member  44 ) of the door frame  25 ). This allows the first shear member  44  to rotate approximately 180° from the use position to the stowed position (as shown in  FIGS. 13 and 17 ). These figures and explanation also apply to the second shear panel  38  and how it folds into the wall panel interior  40   a  of the wall panel  40  of the second lateral wall  24 . 
     It will be appreciated that the steps discussed above are essentially reversed when unfolding the container assembly  10  or when moving the container assembly  10  from the collapsed position to the use position. As certain of the panels and sides are moved to the user position, the panel may be secured to the adjacent panel. For example, certain of the frame members  44  of the adjacent panels may be complementary components that secure one panel to the adjacent panel. For example, the frame member of a movable panel may secure to the frame member of an adjacent panel via magnets, Velcro, buttons, snaps, zippers, friction fit, snap fit, interference fit or any other attachment member. 
       FIGS. 18-20  show a preferred embodiment of securing a movable or pivotable frame member  44  to an adjacent frame member  44 . For this description, the pivotable frame member is numbered frame member  44  or is referred to as a first frame member  44  and the stationary frame member is numbered frame member  44   a  or is referred to as a second frame member  44   a . It should be understood that the “stationary” frame member is not necessarily stationary as it is foldable and collapsible. However, with respect to the unfolding of the container assembly  10 , the “stationary” frame member  44   a  is stationary when the pivotable frame member  44  is pivoted into place such that it interlocks with the stationary frame member  44   a , as described herein. 
     In particular,  FIGS. 18-19  show one of the frame members  44  of the door frame  25  secured to the upright frame member  44  of the inboard wall  18 . Each of the frame members  44  includes a vertically extending tab  50  that is received in a vertically extending recess  52  in the opposite frame member  44 . As shown in  FIG. 19 , tab  50  of each frame member  44  partially defines the recess  52  of that frame member  44 . This secures or interlocks the door frame  25  to the outboard wall  18 .  FIGS. 18-20  show the interlocking frame members  44  of the first lateral side wall and the inboard wall. However, it will appreciated that similar interlocking frame members  44 , tabs  50  and recesses  52  are included on the frame members  44  of other walls where two adjacent walls that are pivotable with respect to one another meet. 
     Another feature of the interlocking frame members  44  is the water resistance capability or the cability to help keep water and other liquids out of the interior of the container or container interior  43 .  FIG. 19A  includes an arrow showing the path that liquid must traverse (the liquid path P 1 ) to enter the container interior  43 . Due to the many turns that the liquid path P 1  takes and the fact that the adjacent frame members  44  are in a generally vertical orientation when the container assembly  10  is in the use position, it is difficult for water to get from the container exterior, through the liquid path and into the container interior. As shown in  FIG. 19A , the liquid path P 1  when the opposing tabs  50  on the two frame members  44  are received in the recesses  52 , the liquid path P 1  includes a path entrance  37 , a first U-shaped channel  53 , a second U-shaped channel  45  that faces in a direction opposite the first U-shaped channel, an extended portion  47  that extends to a path exit  39  that communicates with the container interior  43 . The first and second U-shaped channels include a common arm  41 . The liquid path P 1  is partially defined by the tabs  50  and recesses  52 . Furthermore, as shown in  FIG. 19A , the stationary frame member  44   a  includes an extension portion  35  that allows the tab  50  of the stationary frame member  44   a  to reach and be received in the recess  52  of the pivotable frame member  44 . 
       FIGS. 21-26  show the bottom hinge assemblies  54 , how they help allow the stacking of the different panels as everything is moved to the collapsed position and how the bottom hinge assembly  54  interlocks and allows sliding of the complementary parts so the container assembly  10  can be assembled. As shown in  FIG. 25 , the bottom hinge assembly  54  includes a hinge portion  55  on the base  16  and a knuckle portion  57  on the lower panel  38  or lower panel  30 . As shown in  FIGS. 23-25 , the hinge portion  55  includes a base  56 , a first extension member  58 , a second extension member  60  and a hinge rod  62 . The knuckle portion includes a plurality of knuckle members  64  that are C-shaped and include a channel  66  defined therein. The hinge portion  55  also includes a plurality of knuckle receiving openings  68  defined in the first and second extension members  58  and  60 . 
     As shown in  FIG. 26 , in a preferred embodiment, the hinge portion  55  and knuckle portion  57  are slidable with respect to one another when positioned in an assembly position so that the two walls or panels can be assembled or secured to one another. In all other positions, (e.g., the use and collapsed positions shown in  FIGS. 23 and 24 ) the hinge portion  55  and knuckle portion  57  (and, therefore, the walls or panels they are a part of) are not slidable with respect to one another. In the assembly position, as shown in  FIG. 26 , channel  66  is aligned with the second connection portion  60 . Thus, allowing the hinge rod  62  to be slideable with respect to the knuckle opening  70  (see  FIG. 25 ) and vice versa. Therefore, for example the knuckles  64  of the inboard wall (and/or outboard wall) can be slid onto the hinge rod  62  in a direction parallel to the axis of the hinge rod when the lower panel  36  is positioned as shown in  FIG. 26  (the assembly position). In any other position, a portion of the knuckles  64  is positioned in the knuckle receiving openings, thus preventing and sliding in the axial direction of the hinge rod axis. 
     Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise,” “comprising,” and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of “including, but not limited to.” As used herein, the terms “connected,” “coupled,” or any variant thereof, means any connection or coupling, either direct or indirect, between two or more elements; the coupling of connection between the elements can be physical, logical, or a combination thereof. Additionally, the words “herein,” “above,” “below,” and words of similar import, when used in this application, shall refer to this application as a whole and not to any particular portions of this application. Where the context permits, words in the above Detailed Description of the Preferred Embodiments using the singular or plural number may also include the plural or singular number respectively. The word “or” in reference to a list of two or more items, covers all of the following interpretations of the word: any of the items in the list, all of the items in the list, and any combination of the items in the list. 
     The above-detailed description of embodiments of the disclosure is not intended to be exhaustive or to limit the teachings to the precise form disclosed above. While specific embodiments of and examples for the disclosure are described above for illustrative purposes, various equivalent modifications are possible within the scope of the disclosure, as those skilled in the relevant art will recognize. Further, any specific numbers noted herein are only examples: alternative implementations may employ differing values, measurements or ranges. 
     Although the operations of any method(s) disclosed or described herein either explicitly or implicitly are shown and described in a particular order, the order of the operations of each method may be altered so that certain operations may be performed in an inverse order or so that certain operations may be performed, at least in part, concurrently with other operations. In another embodiment, instructions or sub-operations of distinct operations may be implemented in an intermittent and/or alternating manner. 
     The teachings of the disclosure provided herein can be applied to other systems, not necessarily the system described above. The elements and acts of the various embodiments described above can be combined to provide further embodiments. Any measurements or dimensions described or used herein are merely exemplary and not a limitation on the present invention. Other measurements or dimensions are within the scope of the invention. 
     Any patents and applications and other references noted above, including any that may be listed in accompanying filing papers, are incorporated herein by reference in their entirety. Aspects of the disclosure can be modified, if necessary, to employ the systems, functions, and concepts of the various references described above to provide yet further embodiments of the disclosure. 
     These and other changes can be made to the disclosure in light of the above Detailed Description of the Preferred Embodiments. While the above description describes certain embodiments of the disclosure, and describes the best mode contemplated, no matter how detailed the above appears in text, the teachings can be practiced in many ways. Details of the system may vary considerably in its implementation details, while still being encompassed by the subject matter disclosed herein. As noted above, particular terminology used when describing certain features or aspects of the disclosure should not be taken to imply that the terminology is being redefined herein to be restricted to any specific characteristics, features or aspects of the disclosure with which that terminology is associated. In general, the terms used in the following claims should not be construed to limit the disclosures to the specific embodiments disclosed in the specification unless the above Detailed Description of the Preferred Embodiments section explicitly defines such terms. Accordingly, the actual scope of the disclosure encompasses not only the disclosed embodiments, but also all equivalent ways of practicing or implementing the disclosure under the claims. 
     While certain aspects of the disclosure are presented below in certain claim forms, the inventors contemplate the various aspects of the disclosure in any number of claim forms. For example, while only one aspect of the disclosure is recited as a means-plus-function claim under 35 U.S.C. § 112, ¶6, other aspects may likewise be embodied as a means-plus-function claim, or in other forms, such as being embodied in a computer-readable medium. (Any claims intended to be treated under 35 U.S.C. § 112, ¶6 will include the words “means for”). Accordingly, the applicant reserves the right to add additional claims after filing the application to pursue such additional claim forms for other aspects of the disclosure. 
     Accordingly, although exemplary embodiments of the invention have been shown and described, it is to be understood that all the terms used herein are descriptive rather than limiting, and that many changes, modifications, and substitutions may be made by one having ordinary skill in the art without departing from the spirit and scope of the invention.