Patent Publication Number: US-9834335-B1

Title: Nesting container and nesting container assembly

Description:
CLAIM OF PRIORITY/CROSS REFERENCE TO RELATED APPLICATION 
     The present application is a continuation patent application of previously-filed, currently-pending U.S. patent application Ser. No. 14/838,947 filed on Aug. 28, 2015, the contents of which are incorporated herein in its entirety by reference, and which is based on and claims priority under 35 U.S.C. §119(e) to provisional patent application Ser. No. 62/043,588, having a filing date of Aug. 29, 2014, the contents of which are also incorporated herein their entirety by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention is directed to an interlocking or other container with enlarged wheels which, in certain embodiments, is structured and sized to maximize available space in a pallet (e.g., 463-L Pallet, HCU-6/E Pallet, or other pallets), while reducing the time and work necessary for a user to load and unload the container, transport the container, and stack or load and unload the pallet. 
     BACKGROUND OF THE INVENTION 
     The transportation of goods, equipment, or materials is often conducted or facilitated by stacking or otherwise placing the items on a pallet for loading and subsequent unloading to and from transportation vehicles, including, for example, trucks, trains, planes, etc. In particular, and for exemplary purposes only, the United States military branches and/or organizations such as the U.S. Army, Navy, Air Force, Coast Guard, Federal Emergency Management Administration, and other Department of Defense organizations, as well as those operated or existing in foreign or non-U.S. countries, oftentimes use a standard size pallet such as a 463-L Pallet and/or HCU-6/E Pallet, although others may be used. 
     A number of inefficiencies and problems exist in the currently used manner of transporting traditional containers to and from the pallets, and loading, stacking or unloading materials or items on or from the pallets for shipment. For example, in the military environment, military personnel are often tasked with loading containers or boxes with equipment, clothing, materials, etc. and bringing those containers or boxes to the pallet for loading onto the pallet. The containers or boxes are oftentimes extremely heavy, bulky and difficult to transport, especially over unfinished surfaces (such as gravel, sand, grass, etc.) commonly present in the military environments. 
     Moreover, the containers or boxes, which are generally of a non-uniform shape and size, are then loaded onto the pallet—a time-consuming and extremely labor intensive task. For example, loading the traditional containers or boxes onto the pallet may require guesswork and/or trial-and-error in order to position or orient the traditional containers to fit on the pallet in an optimum manner, position or orientation. Once loaded, the non-uniform shape and size of the containers or boxes create an excessive amount of wasted space between the items or containers. Finally, a packed pallet can oftentimes be unsteady and can collapse before, during or after shipment creating a dangerous situation and environment for crew and passengers of the vessel, ship or other vehicle used to transport the pallet. 
     Accordingly, there is a need for a stacking and/or interlocking container for use in connection with the transportation of equipment, materials, items, etc. via a pallet, including, but not limited to the 463-L Pallet. The proposed container(s) may include enlarged wheels and a handle assembly for easy transportation along unfinished or uneven surfaces (e.g., gravel, sand, grass, etc.) and can be sized to fit neatly on the pallet with minimal or no wasted space in between. The proposed containers may be easily and intuitively stacked via interlocking and/or abutting portions therein and are configured such that a person need not guess as to which direction or orientation the containers can be stacked or interlocked with one another. For instance, it is visually clear that the wheels of one container fit within corresponding wheel receiving portions of another container. 
     Further, certain embodiments of the proposed containers of the present invention may include interlocking members, such as positive and negative shapes, cast onto the outer surfaces thereof, allowing adjacent or stacked containers to be interlocked with one another. The interlocking and/or abutting capabilities restricts or prevents movement, shifting and ultimate collapse of the containers, for example, before, during or after transportation of the pallet. 
     SUMMARY OF THE INVENTION 
     The present invention is generally directed to a container that may engage, abut, interlock, or otherwise connect or nest with other like adjacent, adjoining or bordering containers positioned and stacked above, below, beside and end-to-end to one another. The containers of certain embodiments of the present invention are dimensioned in order to maximize the usable space of a pallet, including, but not limited to a 463-L Pallet, HCU-6/E Pallet, or other pallets, when used in concert with other like containers. To secure the containers on a pallet or otherwise in a connected, adjoining relation to one another, the user may push or position the containers into adjacent like containers, either front-to-back, side-to-side, or on top of one another. The nesting and cooperative configuration of the containers are also structured to restrict or prevent lateral and horizontal slipping or movement between the containers, for example, during transport. 
     For example, the containers of the various embodiments of the present invention include one or more interlocking, mating, or engaging portions that are cooperatively structured to receive, engage or mate with corresponding portions of an adjacently disposed, adjoining or bordering container, whether end-to-end, side-to-side or stacked. Particularly, one of the interlocking, mating or engaging portions may include a wheel assembly receiving portion disposed on an upper area of the container (e.g., at least partially on a lid) and configured to matingly receive the wheel assembly of an adjacent or adjoining container disposed in a stacked manner. Similarly, one of the interlocking, mating or engaging portions may include a foot receiving portion disposed on an upper area of the container and configured to matingly receive one or more feet of a stacked container. 
     Other interlocking, mating or engaging portions may include outer extension portions extending outward from the sides or ends of the container which laterally mate with corresponding extension portions from an adjacent or adjoining container disposed in a side-by-side or end-to-end manner. The outwardly protruding extension portions are correspondingly positioned on the sides and/or ends of the container(s) such that they line up laterally or next to the corresponding protrusions of an adjacent or adjoining container. 
     Yet another interlocking, mating or engaging portion of at least one embodiment may include a handle engaging portion that is structured and configured to receive and at last partially engage or retain a handle from an adjacent or adjoining container. The handle engage portion may thus slidingly receive the handle from an adjacent or adjoining container therein and thereby restrict movement between the containers in at least one direction. 
     In order to move a single container, the user may grab a handle assembly and lift the container slightly at the front (to disengage the foot, and engage the wheels). Using the mechanical leverage of the handle assembly and the wheels, the user is able to push, pull or otherwise move the container in the desired direction. 
     Additional features may include single or double walled reinforced construction providing superior strength and integrity to the container. For example, in at least one embodiment, the container may include an upper lip or edge upon which the lid rests or engages. The upper lip or edge may be constructed with a reinforced double walled configuration providing added strength and integrity and allowing the container to withstand heavy stacked loads. The lip may be supported, for example, vertically, by at least one wall, whether single or double walled. The at least one wall may include a corrugated, honeycomb or other like configuration having a plurality of alternating recesses and protrusions that provide additional strength and integrity to the container, as a whole. 
     These and other objects, features and advantages of the present invention will become more apparent when the drawings as well as the detailed description are taken into consideration. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front-left perspective view of a container disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 2  is a front view of the container illustrated in  FIG. 1 . 
         FIG. 3  is a rear view of the container illustrated in  FIGS. 1 and 2 . 
         FIG. 4  is a left side view of the container illustrated in  FIGS. 1 through 3 . 
         FIG. 5  is a right side view of the container illustrated in  FIGS. 1 through 4 . 
         FIG. 6  is a top view of the container illustrated in  FIGS. 1 through 5 . 
         FIG. 7  is a bottom view of the container illustrated in  FIGS. 1 through 6 . 
         FIG. 8  is a rear perspective view of the container illustrated in  FIGS. 1 through 7 . 
         FIG. 9  is a bottom perspective view of the container illustrated in  FIGS. 1  thorough  8 . 
         FIG. 10  is a top view of two containers disposed in an adjacent, side-by-side, lateral relation to one another, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 11  is a rear perspective view of two containers disposed in an adjacent, stacked relation to one another, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 12  is a front perspective view of two containers disposed in an adjacent, stacked relation to one another, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 13  is a perspective view of two containers disposed in an adjacent, end-to-end relation to one another, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 14  is a top perspective view of a container as disclosed in accordance with at least one embodiment, with the lid open. 
         FIG. 15  is a perspective view of the container system or assembly comprising a plurality of adjacent containers disposed on a pallet, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 16A  is a top perspective view of a container comprising a double-walled construction, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 16B  is a cut-away view of the container with a double-walled construction along line  16 B- 16 B, as illustrated in  FIG. 16A . 
         FIG. 17A  is a top perspective view of a container comprising a single-walled construction, as disclosed in accordance with at least one embodiment of the present invention. 
         FIG. 17B  is a cut-away view of the container with a single-walled construction along line  17 B- 17 B, as illustrated in  FIG. 17A . 
     
    
    
     Like reference numerals refer to like parts throughout the several views of the drawings provided herein. 
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in the accompanying drawings, and with particular reference to  FIGS. 1 and 15 , for example, the present invention is directed to a container  20  and container system or assembly  100  for facilitating the transportation or shipment of goods, materials, equipment, and other items. As described herein, certain embodiments of the container(s)  20  may, but need not be used in connection with standard pallet sizes, including, but not limited to a 463-L Pallet, HCU-6/E Pallet, etc. For example, in at least one embodiment, the dimensions of the container  20  may be formed or constructed so that when it is interlocked with, connected to or placed side-by-side, end-to-end, and/or stacked with additional adjacent or adjoining containers  20  of a similar construction and configuration in order to form a container system or assembly  100 , the container system or assembly  100  of at least one embodiment will fit on the pallet  110 , and in certain embodiments may use or occupy substantially all of the space provided on the pallet (e.g., 463-L or HCU-6/E pallet). As an example, the containers  20  may be placed side-by-side (e.g., three wide), front-to-back or end-to-end (e.g., three deep) and stacked top to bottom (e.g., four tall) to create a cube, cuboid or system of containers  20  that may be easily and efficiently placed onto the pallet for transportation. 
     It should also be noted that the container(s)  20  of the various embodiments described herein need not be used in connection with military or other pallets, and can instead be used individually or in conjunction with other similarly constructed and configured containers  20 . Some embodiments of the containers  20  may function as a cooler, insulated box, portable ice chest or other like container that can be used to maintain a generally consistent temperature (e.g., cool or warm) therein. 
     In any event, the container  20  of at least one embodiment includes a box or base  1  defining an interior portion  5  (see, e.g.,  FIG. 14 ) and an at least partially open top portion. A lid  2  may be included and disposable in an at least partially covering and removable relation to the base  1 . Specifically, the base  1  may be structured to include a bottom wall or bottom portion  22 , a plurality of at least two oppositely disposed side walls  23 ,  24 , an at least two oppositely disposed end walls, such as a front wall  25  and a rear wall  26 . As described herein, the base  1  of at least one embodiment of the present invention is structured and configured to define an open portion (e.g., at the top) and an interior portion  5  for receiving and retaining items therein. 
     Furthermore, in at least one embodiment, the base  1  includes a rotationally molded plastic box measuring between approximately 27 and 29 inches wide, approximately 22 to 23 inches tall, and approximately 34 to 35 inches long, although other dimensions and materials may be contemplated and included within the full spirit and scope of the various embodiments of the present invention. In addition, the lid  2 , of at least one exemplary embodiment may be rotationally molded from plastic and may measure approximately 34 and 35 inches long, between approximately 4 and 6 inches tall, and approximately 27 inches wide at its longest/widest points. Of course, other dimensions and materials for the lid  2  may be contemplated and included within the full spirit and scope of the various embodiments of the present invention. 
     In some embodiments, a cavity, lid retention portion, or ridge may extend around an upper surface  3  of the base  1 , for example, at least partially around the open portion  5  which facilitates a tight and secure connection between the base  1  and the lid  2 . Furthermore, in at least one embodiment, a silicone or other like gasket (not shown) may be disposed at least partially around the upper surface  3  of the base  1  for engagement or contact with the lid  2 . In this manner, the lid  2  may be pivotally mounted to the box or base  1  and pivoted into an open and/or closed relation. Other connections, such as sliding engagement may be contemplated. In further embodiments, the lid  2  may be completely removed from the box or base  1 . 
     Furthermore, as shown in the drawings and described herein, the base  1  of at least one embodiment of the present invention includes at least one, but in many cases, a plurality of interlocking, receiving, engaging and/or movement restriction portions, generally referenced as  30 . As will be described herein, the plurality of interlocking, mating or engaging portions  30  of the present invention are structured to receive, engage, mate or nest with corresponding portions of a juxtaposed, adjacent or adjoining (e.g., laterally or side-to-side, end-to-end, or stacked) container  20 ′ of a similar or identical construction or configuration such that the two containers  20 ,  20 ′ cooperatively nest with one another. For instance, in at least one embodiment, the interlocking, mating or engaging portions  30  may include one or more recesses that receive corresponding portions (e.g., one or more wheels, one or more feet, one or more handles) from an adjacent or adjoining container  20 ′ or one or more protrusions or positive members that cooperatively engage, mate or abut with corresponding portions (e.g., corresponding protrusions) from an adjacent or adjoining container  20 ′. In this manner, the positive and/or negative interlocking, mating or engaging portions  30  of the various embodiments of the present invention may engage, mate or interlock with one another in order to at least partially restrict movement between the container  20  and the adjacent or adjoining container  20 ′ in at least one direction (e.g., forward and backward, side to side, twisting, etc.) For example, referring to  FIGS. 1 through 10 , at least one embodiment of the present invention includes one or more interlocking, mating or engaging portions  30  defined as at least one external protrusion or mating portion  40 ,  42  that is configured and disposed to mate or engage with similar external protrusion(s) or mating portions  40 ′,  42 ′ of an adjacent or adjoining container  20 ′ ( FIG. 10 ). Particularly, external protrusion(s) or mating portions  40 ,  42  of at least one embodiment are positive, outwardly extending members, such as ledges or other like structures that cooperatively engage with other cooperatively structured and corresponding portions of the adjacent or adjoining container  20 ′. In the embodiment shown, the external protrusions or mating portions  40 ,  42  are disposed on opposite lateral sides of the container  20 , for example, on or near the side walls  23 ,  24  or a corresponding lip or edge  28 . Particularly, each side of the container  20  in the embodiment illustrated includes two external protrusions or mating portions  40 ,  42 —one near the front (e.g., proximate the juncture between the side walls  23 ,  24  and the front wall  25 ) and one near the rear (e.g., proximate the juncture between the side walls  23 ,  24  and the rear wall  26 ). However, it should be noted that other embodiments may include more or fewer external protrusions or mating portions  40 ,  42  disposed in different locations about the exterior of the container  20 , including along the side walls  23 ,  24 , end walls  25 ,  26 , lip  28  or other portion(s) of the container  20 . 
     Referring to  FIG. 10 , the external protrusions or mating portions  40 ,  42 , for example, on one side of the container  20 , are cooperatively positioned such that when an adjacently disposed or adjoining container  20 ′ (such as laterally disposed or side-by-side container, as shown by arrows in  FIG. 10 ) is disposed next to the container  20 , the mating portions  40 ,  42  of one container  20  will substantially match up or align with and laterally engage the mating portions  40 ′,  42 ′ of the adjacent container  20 ′. For example, on the same side of container  20 , one mating portion  42  may be offset from the corresponding or closest corner of the container  20  a different distance than a second mating portion  40  is offset from its corresponding or closest corner of the container  20 . The offset distances are determined such that when an adjacent or adjoining container  20 ′ of a similar construction is rotated (e.g., 180 degrees) and adjacently aligned (as shown in  FIG. 10 ), the mating portion  42  of container  20  will laterally mate or engage with the corresponding positioned mating portion  40 ′ of adjacent or adjoining container  20 ′, and the mating portion  40  of the container  20  will mate or engage with the correspondingly positioned mating portion  42 ′ of the adjacent or adjoining container  20 ′. 
     Particularly, because the mating portions  40 ,  42  extend at least partially outward from the container  20 , the mating portions  40 ,  42  each include at least one lateral edge or surface  43  that extends from the container  20 . The lateral surfaces  43  and  43 ′ will mate or engage with one another thereby preventing or at least partially restricting movement between the container  20  and laterally disposed adjacent or adjoining container  20 ′ in at least one direction, such as, in a front to back linear direction. Rotational movement between the containers  20 ,  20 ′ is also restricted by the mating or engaging side-to-side relation there between. 
     It should be noted that the side walls  23 ,  24  and/or the front and rear walls  25 ,  26  (or a corresponding ledge or lip thereof) of one or more embodiments of the present invention may include offset abutting members or ledges or cooperative positive and negative interlocking members. Other interlocking or abutting members structured to restrict lateral, rotational or other movement of adjacently disposed or engaged containers are contemplated and within the full spirit and scope of the present invention. 
     Referring back to  FIGS. 1 and 2 , in at least one embodiment, the present invention includes a lid securing or closure assembly  50  extending between the lid  2  and the base  1  of the container  20  in order to at least partially secure the lid  2  in a closed orientation. For example, the lid securing or closure assembly  50  of at least one embodiment may include a pivoting or other movable structure fixedly secured to the lid  2  and removably securable to the base  1 , as shown in  FIGS. 1 and 2 . For example, in one embodiment, the lid securing or closure assembly  50  may include a rubber (or other) T-handle or T-bracket, as shown, that pivots into and out of a securing relation between the lid  2  and the base  1 . However, it should be noted that the reverse may be contemplated, meaning that the pivoting or other movable structure of the lid securing assembly  50  may be fixedly secured to the base  1  and removably securable to the lid  2 . 
     Still referring to  FIGS. 1 and 2 , the lid securing or closure assembly  50  of at least one embodiment may be substantially or completely recessed when disposed in the secured relation (as shown), or otherwise, when the lid  2  is securely held to the base  1  via the lid securing or closure assembly  50 . Accordingly, as mentioned above, in one embodiment, the lid closure assembly  50 , which may be in the form of a “T-bracket” or other lock, may be at least partially recessed within the base  1 , and in particular, within at least one of the external protrusions or mating portions  42 . In this manner, when the lid  2  is closed onto the base  1 , a user may pivot or maneuver the T-bracket or other lid securing assembly  50  downward and into an engaging and at least partially recessed relation into a correspondingly positioned external protrusion or mating portion  42 . Thus, the external protrusion or mating portion  42  of at least one embodiment, may include a recessed channel cooperatively structured and dimensioned to removably receive and engage the lid closure assembly  50  therein. 
     Referring to  FIGS. 1 through 9 , at least one embodiment of the present invention further includes a wheel assembly, generally referenced as  60 , comprising at least one, but more practically, a plurality of at least two wheels  62 , such as, for example, enlarged or heavy duty wheels. In particular, each of the wheels  62  may, but need not necessarily be at least partially disposed within a corresponding wheel well  64  or wheel retention portion positioned at or near the side and/or rear walls of the base  1 , or otherwise in the rear bottom portions of the container  20  or base  1 . Particularly, in at least one embodiment, the wheels  62  are substantially constructed of rubber having a ten inch diameter, and include a bearing to facilitate rotation thereof, however, it should be apparent that other materials and sizes are contemplated within the full spirit and scope of the present invention. 
     In addition, the wheels  62  of at least one embodiment may be connected to one another via a single axle extending between the wheels  62  and along a substantial portion of the width of the base  1 . Additionally, the axle of at least one embodiment may reside or nest within an indent on the outside of the container  20  or base  1  which extends along a substantial portion of the width and up into the wheel wells  64 . The nesting of the axle within the retention indent (not shown) is structured to restrict or prevent the axle form twisting or rotating. In this manner, the wheels  62  may rotate via a bearing attached to the axle and/or wheels  62 . In at least one exemplary embodiment, the axle may include a metal or other rigid tube measuring approximately 0.79 inches in diameter and 24.8 inches long although other dimensions, materials and configurations structured to facilitate implementation of the present invention in the intended manner is contemplated. 
     In at least one embodiment, the outermost portion of the wheels  62  may be flush with, recessed from, or only slightly extending beyond the outer surface of the side walls  23 ,  24  and rear wall  26 . This allows the containers  20  and adjacent or adjoining side-by-side and end-to-end containers  20 ′ to engage, abut, mate or otherwise be disposed proximate one another without the restriction or substantial restriction from the wheels  62 . It should be noted, however, that the wheels  62  of at least one embodiment may extend beyond the bottom surface of the container  20 , for instance, in order to allow a user to move or transport the container  20  via the wheels  62  rotating on the surface, such as the ground. 
     Furthermore, the plurality of interlocking, engaging or movement restriction portions  30  of the container  20  of at least one embodiment of the present invention may include a wheel assembly receiving portion  45  disposed on an upper portion of the container  20  and being configured to at least partially receive and/or retain a portion of a wheel assembly from an adjacent or adjoining stacked container  20 ′. In particular, as shown in the exemplary view of  FIG. 11 , the wheels  62 ′ of one container  20 ′ (e.g., a stacked container) will at least partially fit within the wheel assembly receiving portion  45  of a lower container  20  upon which it is stacked. 
     For example, as shown in  FIGS. 1 and 3 , the lid  2  of at least one embodiment may be shaped, configured or at least partially constructed to define at least two spaced apart recesses, for instance, at a rear portion thereof. Those recesses may be cooperatively configured to allow the wheels  62  of another, stacked container  20 ′ to pass into the wheel assembly receiving portion  45 . Particularly, upon stacking a container  20 ′, the wheels  62  of the stacked container  20 ′ may be positioned into the wheel receiving portion  45 . In this manner, as shown in  FIG. 11 , for example, the containers  20 ,  20 ′ may be stacked upon one another while the wheels  62  fit within the wheel assembly receiving portions  45 . Upon doing so, the extending or protruding wall(s)  46  and floor  47  that define the recesses of the wheel assembly receiving portion  45  are structured to at least partially restrict movement of the stacked container  20  in at least one direction, including, for example, a side-to-side movement, twisting or rotating movement, etc. relative to the lower container  20 . 
     In addition, referring to  FIGS. 3 and 9 , the container  20  comprises an elongated bottom surface member, generally referenced as  48 , disposed between the two wheels  62 . Although, this elongated bottom surface member  48  is shown as a generally flat surface angled with respect to the bottom wall  22  and rear wall  26  of the container, virtually any type of surface may be contemplated. Either way, as shown in  FIG. 1 , the lid  2  of at least one embodiment comprises at least one cooperatively structured surface  49  that is configured to at least partially mate with the elongated (or other) bottom surface of a stacked container  20 ′. Again, in the embodiment shown, the elongated bottom surface member  48  of one container and the cooperative surface member  49  of the lid  2  of another container comprise cooperatively angled, yet substantially flat surfaces that mate with one another. Although other surfaces, whether angled, flat, smooth, bumpy, with ridges and recesses, etc. are contemplated. 
     Further structural features of at least one embodiment of the present invention include at least one support foot  70  disposed at or near the bottom of the base  1 , for example, in the front thereof as shown in the exemplary embodiment of  FIGS. 1 through 9 . Specifically, the foot  70  may contact a support surface, such as the ground, pallet or an adjacent or adjoining lower container, and maintain the container  20  in a substantially level or stable orientation. This may be particularly useful when loading or unloading the container  20 , for example, with equipment, materials or other items, or in order to support the bottom container(s)  20  in a stacked relation, as described herein. 
     In particular, certain embodiments may include a plurality of feet  70  disposed in a spaced relation along the bottom of the container, whereas other embodiments may include a single foot  70  such as, but not limited to an elongated foot. 
     In any event, the plurality of interlocking, engaging or movement restriction portions  30  of the container  20  of at least one embodiment of the present invention may include at least one foot receiving portion  72  disposed on an upper portion of the container  20  and being configured to at least partially receive and/or retain at least a portion of a foot  70  from an adjacent or adjoining and stacked container  20 ′. In particular, as shown in the exemplary view of  FIG. 11 , the feet  70 ′ of one container  20 ′ (e.g., a stacked container) will at least partially fit within the a corresponding foot receiving portion  72  of a lower container  20  upon which it is stacked. 
     For example, as shown in  FIGS. 1 and 2 , the lid  2  of at least one embodiment may be shaped, configured or at least partially constructed to define one or more recesses, for instance, at a front portion thereof or otherwise in a location which corresponds to the location of feet  70  of a stacked container. The recess may be cooperatively configured to allow the foot or feet  70  of another, stacked container  20 ′ to pass into a corresponding foot receiving portion  72 . Particularly, upon stacking a container  20 ′, the foot or feet  70  of the stacked container  20 ′ may be positioned into the foot receiving portion(s)  72 . Upon doing so, in at least one embodiment, extending wall(s) or surface(s),  73 , 74  that define the recesses of the foot receiving portion(s)  72  are structured to at least partially restrict movement of the stacked container  20 ′ in at least one direction, including, for example, a side-to-side movement, twisting or rotating movement, etc. relative to the lower container  20 . 
     In other embodiments, for example, the front edge of the lid  2  or container  20  may be chamfered (not shown) such that when a container  20 ′ is stacked thereon, the foot or feet  70  thereof may be positioned at least partially onto, into, or along the chamfered portion. For instance, the interior edge of the support foot  70  may comprise an angled configuration cooperatively configured with the chamfered edge of the lid  2  allowing the containers  20  to be easily stacked. 
     Further embodiments of the present invention include at least one handle assembly  80  that can be used, in some cases, to carry or transport the container  20 , and in other cases, to interlock, engage or mate with an adjacent or adjoining container  20 ′, as will be described. Particularly, the handle assembly  80  of at least one embodiment may include a flexible or bendable handle disposed on at least one end, side or other location of the container, for example, in a recessed cavity  82 . For example, in one embodiment, the handle assembly  80  may include a rope or other like substantially flexible and durable material that can be easily grabbed and manipulated in order to carry, pull, lift, or otherwise move the container  20 . In some embodiments, the container may include at least two handle assemblies  80 , for example, disposed on opposite ends or opposite sides of the container  20 , allowing a user to grab both handles  80 , or allowing one user to grab one handle  80  and another user to grab the other handle  80 , for transportation of the container  20 . It should be noted that one or more handle assemblies  80  may be included or incorporated into other locations or portions of the container  20 , including the lid  2 , for example. 
     For instance, referring to the exemplary embodiment of the  FIG. 1 , the handle assembly  80  may include a rope handle, forming a loop or partial loop. In such a manner, the handle assembly  80  may include two sides  83 ,  84  that meet at a grip end  85 , as shown. A rubber or other like grip may be secured at the grip end  85  of the handle assembly  80 . Of course, other handle assemblies  80  may be contemplated within the full spirit and scope of the present invention, including, for example, a retractable handle, slidingly engaged handle, tubular handle, or handle assemblies made of rigid or semi-rigid materials, including, but in no way limited to plastic, metal or a combination thereof. 
     In addition, the plurality of interlocking, engaging or movement restriction portions  30  of the container  20  of at least one embodiment of the present invention may include a handle engagement portion  86  cooperatively structured to receive, retain and interlock with a handle assembly  80 ′ from an adjacent or adjoining container  20 ′, such as an end-to-end container  20 ′, as shown in  FIG. 13 . Particularly, the handle engagement portion  86  of at least one embodiment is configured to retain the handle assembly  80 , such as, but not limited to, a flexible and durable rope handle, in an interlocking and secure manner. As shown in  FIG. 1 , the handle engagement portion  86  of at least one embodiment is disposed on a rear, upper portion of the lid  2 , although other locations on the container  20  may be contemplated. 
     Specifically, the handle engagement portion  86  of at least one embodiment includes at least one handle receiving region  87  disposed adjacent the end-to-end or other adjoining container  20 ′. The handle receiving region  87  may include an opening or aperture defined by one or more walls  88 . In this manner, the handle assembly  80  may slide or fit within the opening of handle receiving region  87  and engage or interlock with the one or more walls  88 , for example. 
     Particularly, referring to the embodiment illustrated, the at least partially looped handle assembly  80  may slidingly fit into the two handle receiving regions  87  by disposing the two sides  83 ,  84  of the handle assembly therein. The grip end  85  of the handle assembly  80  may thus engage wall  88  of the handle engagement portion  86 , as shown in  FIG. 13 . This will at least partially restrict movement of the container  20  and/or the end-to-end adjoining container  20 ′ in at least one direction, such as front to back direction. 
     Additional features of certain embodiments of the present invention may include a locking assembly and/or latch  90  structured to securely hold or lock the lid  2  in a tightly closed relation with the base  1 . The locking assembly  90  may be mechanically fastened to the lid  2  via anchor bolts, rubber washers and nuts. For example, the locking assembly or latch  90  may include a cam operated latch embedded into the lid  2  and disposable into and out of an engaging relation with an internal lip disposed on the box or base  1 . For instance a lever  92  ( FIG. 1 ) may be manually rotated in order for a cam  94  ( FIG. 14 ) to engage the inner lip, thereby securely locking or holding the lid  2  in place via compressive force against the gasket, for example, providing an air-tight and/or water-tight seal in certain embodiments. Unlocking or disengaging the cam  94  allows the lid  2  to pivot open, and in some instances the lid  2  may pivot 180 degrees to the open position. The locking assembly  90  may be equipped with a lock (e.g., keyed lock, combination lock, biometric lock, etc.) 
     As shown in  FIG. 14 , the locking assembly  90  of at least one embodiment may include a multiple-point (e.g., a three-point) lock, meaning that there are multiple engaging portions on the inside of the locking assembly  90  that engage with an internal lip or recess on the base  1  or container  20 . For example, in the embodiment illustrated in  FIG. 14 , in addition to the cam  94 , the locking assembly  90  may include additional locking rods or members  95 ,  96  that engage or disengage with a cooperative lip or recess in order to lock and unlock the lid  2 , respectively. For instance, manipulating the handle  92  of the locking assembly  90  to a locked position will simultaneously extend the cam  94  and the additional locking members  95 ,  96  into a locked engagement with a cooperative lip or recess. Similarly, moving the handle  92  to an unlocked position, will simultaneously disengage the cam  94  and the additional locking members  95 ,  96  from the cooperative lip or recess, thereby unlocking the lid  2 . The multiple-point (or three-point) locking assembly  90  provides additional security and locking power to the container  20 . 
     Referring again to  FIG. 1 , for example, the container(s)  20  of at least one embodiment may also include a pressure equalization valve or drain  15  disposed through the container  20 , for example, in the base  1 . The valve or drain  15  may be selectively opened and closed in order to equalize pressure or drain fluid from the container  20 . For instance, the valve or drain  15  allows the container  20  to maintain a constant internal pressure relative to the air pressure outside of the container  20 . For example, oftentimes the pressure inside the container  20  may be unequal to the pressure outside of the container  20 , which can oftentimes create difficulty in opening the lid  2  and accessing the interior portion  5  of the container  20 . Accordingly, a user may open the value in order to equalize the pressure inside of the container  20  relative to the outside pressure. In some embodiments, the pressure equalization valve  15  may be water proof or otherwise not pass water there through. However, in certain embodiments where the container  20  is used as a cooler or ice box, the drain  15  may be used to release excess water from the interior portion of the container  5 . Thus, opening the drain  15  will create a pass through for fluid and other materials to drain or be released form the container  20 . In a non-limiting exemplary embodiment, the valve or drain  15  may be made of Gore-Tex and plastic and measure approximately 0.57 inches wide and 0.23 inches from the face or surface of the container, although other materials, dimensions and configurations are contemplated. 
     Further embodiments may also include an additional retention slot or aperture  17  through which additional ropes, straps, cords, bungees, etc. may be secured or passed. As shown in  FIG. 1 , the retention slot  17  is disposed in an at least partially recessed portion on an end of the container  20  and can be included in a reinforced panel for additional strength and integrity. Accordingly, the slot  17  of at least one embodiment may pass completely through a portion of the container  20  allowing securing devices (e.g., ropes, straps, cords, etc.) to pass through the slot  17  and used for additional tie-downs, handles, or interlocking portions  30  of the present invention. For instance, using the additional retention slots  17 , the container  20  may be tied or secured to an object, e.g., a car, truck, or pallet, or another adjacent container  20 ′. 
     Additional structural features of certain embodiments of the present invention may include further handles  93 ,  98  embedded, molded or formed as part of the container  20  in order to further facilitate manipulation (e.g., movement, carrying, lifting, pulling or pushing) of the container  20 . As an example,  FIGS. 7 and 9  illustrate additional handle portions  93  formed on or near the bottom of the container  20 . The handle portions  93  of the illustrated embodiment are defined by recesses in the base  1  of the container which can be grabbed or gripped by a user. A plurality of ridges, ripples or other like contours may be formed at one end of each of the resecess or handle portions  93  and can be used as finger holds or portions upon which a user&#39;s fingers may easily engage for faciliting the manipulation of the container. 
     Additional handle portions  98  are also illustrated in  FIGS. 1, 2, 3, 8 and 9 , which are formed by a ledge or overhang, for example, an at least partially downward overhang formed as part of the base  1  or container  20 . In the illustrated embodiments, the additional handle portions  98  are shown as being located on the ends of the container  20  and as part of the recessed cavities  82  which contain the handle assemblies  80 , discussed above. In this manner, a user may grab onto the overhang or ledge of the additional handle portion  98  for facilitating manipulation of the container  20 , if desired. 
     Referring now to  FIG. 15 , the containers  20  may be positioned in a lateral side-by-side relation, front-to-back or end-to-end relation and stacked relation, for example, in order to maximize the space provided in a pallet, such as, but certainly not limited to a 463-L Pallet. For example, as shown in  FIG. 15 , containers  20  are illustrated as being disposed on a pallet  110 , such as a 463-L pallet. In certain implementations, the containers  20  are thus sized and configured such that they can be juxtaposed, adjoined, nested or adjacently disposed (side-by-side, end-to-end, and stacked) in a manner such that they cooperatively fit (e.g., at least three wide, at least three deep, and at least four stacked) on the pallet. Upon positioning the containers  20  in a side-by-side, end-to-end or stacked relation to one another, the various interlocking, mating or engaging portions  30  of the present invention will interlock, mate or engage with corresponding portions of the adjacent or adjoining (side-by-side, end-to-end or stacked) container  20 ′, as described herein. The interlocking, mating or engaging portions  30  of the various embodiments are structured to maintain the adjacently positioned or adjoining containers  20 ′ in place, restricting movement between the containers  20 ,  20 ′, and minimizing collapse, especially during transportation. 
     Moreover, in certain embodiments, the entire lid  2  or at least some portions of the lid  2  may be constructed of double-walled rotationally molded plastic to provide reinforcement or added strength to the lid  2  allowing the ability to stack heavy loads on top of the lid  2  without the potential of cracking or collapse. 
     Similarly, referring to  FIGS. 16A and 16B , the box or base  1  of at least one embodiment may be double-walled, for example, with a double-walled lip  28 . In addition, the side walls  23 ,  24  and end walls  25 ,  26  may also be double-walled or otherwise include an inner and outer wall. For example,  FIGS. 16A and 16B  illustrate the double-walled configuration of at least one embodiment of the present invention. It should be noted that the double-walled configuration may be constructed using rotational molding, although virtually any manufacturing technique may be implemented. 
     For example, the walls  23 ,  24 ,  25 ,  26  and in some embodiments the bottom  22  and lid  2 , may include an inner wall  200  and an outer wall  210 . As shown in  FIG. 16B , the upper lip or edge  28  may also include a double-walled construction and may be disposed on top of both the inner wall  200  and the outer wall  210 . Such a configuration (i.e., the double-walled lip and walls of the base  1 ) provides added integrity and stability to the container  20  and allows the container  20  to be able to withstand heavy loads stacked thereupon, such as, other adjacently stacked containers  20  which may be filled with heavy equipment or objects. 
     In addition, at least one of the walls, e.g., inner wall  200  or outer wall  210 , may include a corrugated or honeycomb like configuration in that it may include alternating recesses  212  and protrusions  214 , as illustrated via the outer wall  210  in  FIG. 16A . The corrugated configuration also provides added integrity and strength to the container  20  such that the wall is able to support the lip or edge  28  in a more efficient manner. 
     Furthermore, as shown in  FIG. 16B , in at least one embodiment, there may be a space  205  between the inner wall  200  and out wall  210 . This space may be at least partially filled with foam or other insulating material, if desired, and particularly, in the embodiment wherein the container  20  may be used as a cooler or ice chest. Accordingly, not only does the double-walled configuration of at least one embodiment provide added strength and integrity, but it can also be used to provide insulation properties, which can facilitate maintaining a substantially constant temperature (whether hot or cold) on the interior thereof. 
     It should be noted, however, that certain embodiments of the present invention may include a single-walled configuration at certain portions of the base  1 . This can be used to maximize the interior dimension of the container and allow additional space for retaining items therein. For instance, the wall(s)  23 ,  24 ,  25 ,  26  of at least one embodiment may include a single-layered outer wall  210  which can be used to support the lip or edge  28 . For instance, this may be accomplished by removing and discarding the inner wall  200  (e.g., by physically cutting the inner wall  200  out), although in some implementations the container  20  may be manufactured with a single-layered wall such that the inner wall need not be removed. Furthermore, in some embodiments, the lip or edge  28  may remain as a double-walled construction, as shown in  FIG. 17B , for example, which, as above, can facilitate the strength and integrity of the container  20 , especially when heavy loads (or stacked containers) are placed thereon. Accordingly, in some embodiments, and as described above, the outer wall portion  210  of the container  20  may include a corrugated, honeycomb or other uneven configuration comprising a plurality of recessed and protruding portions. This type of configuration can assist in the support of a double-walled lip in that the corrugated or other like wall  210  provides support to the lip or edge  28  in multiple areas via the recessed and extended portions of the corrugated configuration, rather than a straight line. 
     Since other modifications and changes varied to fit particular operating requirements and environments will be apparent to those skilled in the art, the invention is not considered limited to the example chosen for purposes of disclosure, and covers all changes and modifications which do not constitute departures from the true spirit and scope of this invention. This written description provides an illustrative explanation and/or account of the present invention. It may be possible to deliver equivalent benefits using variations of the specific embodiments, without departing from the inventive concept. This description and these drawings, therefore, are to be regarded as illustrative and not restrictive. 
     Now that the invention has been described,