Abstract:
A stable extendable apparatus is provided which includes top, bottom, front and rear structures coupled together. The top and bottom structures each include at least one extendable member which defines a minimum length in a longitudinal retracted position and a maximum length in a longitudinal extended position. The front and rear structures each includes a first side support, a second side support, and an extendable cross-support to couple the first and second side supports together. Extension or retraction of the extendable cross-support changes an angle of orientation of the first side support relative to the second side support. The first rear side support, the second rear side support, and the extendable rear cross-support correspond to positions of the respective front supports.

Description:
FIELD 
     An embodiment of the invention relates generally to a cart for storage and transport of components. More particularly, the invention relates to an A-frame cart that can be extended and collapsed both lengthwise and across its width and that can be configured using interchangeable brackets to accommodate different storage and transport requirements of objects having different shapes and sizes. 
     BACKGROUND 
     Carts are a primary device for storing and transporting components or other objects. Since there are all sorts of different components that vary greatly in size and shape, there are also a great variety of carts available having different sizes and configurations intended to meet different component size and shape requirements. Generally, as components become larger and require more specific mounting methods, a cart intended to store and transport the larger components becomes proportionately larger and bulkier, and the cart also tends to be more specialized thereby limiting its use for components other than the components for which it is intended. Such larger carts also have limited maneuverability and take up a larger amount of space in storage areas both during and between uses. 
     Platform carts, which are sometimes referred to as platform trucks, are widely used due to their ability to store a variety of components. Platform carts come in a variety of sizes and configurations including basic flat platform carts, panel movers, deep retaining wall platform trucks, folding handle platform trucks, bar cradle trucks, bar and pipe trucks, luggage trucks, and the like and are typically ‘general purpose’ in that they are not designed for specific components although they may have certain features useful for certain types of components. For example, such carts may include uprights to support sheets of paneling or plywood, cradles for holding different sizes of piping, etc. but are not designed for a specific size of paneling or plywood, size of piping, etc. Generally, the components stored and transported in such platform carts merely sit at rest atop the platform and, for certain carts, may lean against an upright or be otherwise constrained by a retaining wall, a cradle, posts, etc. But, such carts typically provide no method for any specialized mounting or capturing of specific components to include sensitive components. 
     In order to reliably store and transport specific components, custom carts must be designed and manufactured that meet mounting requirements of the specific components. Custom designed carts tend to be costly and their specialized characteristics can result in a large number of custom carts that collectively require a significant amount of storage space. 
     Therefore, there is a need for an improved cart for storage and transport of components. 
     SUMMARY 
     According to one aspect of invention, there is provided a stable extendable apparatus to receive an attachable component. The apparatus includes a top structure, a bottom structure, a front structure and a rear structure. The top structure includes at least one extendable top member which defines a minimum length of the apparatus in a longitudinal retracted position and a maximum length of the apparatus in a longitudinal extended position. The front structure is coupled to the top structure. The front structure includes a first front side support, a second front side support, and an extendable front cross-support to couple the first and second side supports together. The extendable cross-support defines a minimum width of the apparatus in a lateral retracted position and a maximum width of the apparatus in a lateral extended position. Extension or retraction of the extendable front cross-support changes an angle of orientation of the first front side support relative to the second front side support. 
     The bottom structure is coupled to the front structure and opposed to the top structure. The bottom structure includes at least one extendable bottom member which corresponds in length with the extendable top member. The rear structure is coupled to the top structure and bottom structure. The rear structure includes a first rear side support, a second rear side support, and an extendable rear cross-support to couple the first and second rear side supports together. Extension or retraction of the extendable rear cross-support changes an angle of orientation of the first rear side support relative to the second rear side support. The first rear side support, the second rear side support, and the extendable rear cross-support correspond to positions of the first front side support, second front side support, and extendable front cross-support, respectively. 
     According to another embodiment of an embodiment of the invention, the apparatus includes a support arm attachable to the top structure and the bottom structure. The support arm may provide secondary support to the apparatus. The support arm may also include a plunger spring system to attach the support arm to the top and bottom structures. The support arm may also define a plurality of mounting holes to receive a respective amount of brackets. 
     According to further embodiment of an embodiment of the invention, the first front side support, the second front side support, the first rear side support, and the second rear side support define a plurality of mounting holes to receive a respective amount of brackets. 
     According to another embodiment of an embodiment of the invention, the bottom structure includes at least one moving device to move the apparatus. The moving device may include but is not limited to wheels, tires, or the like. 
     According to another embodiment of an embodiment of the invention, wherein the extendable front cross-support, extendable rear cross-support, extendable top member, and extendable bottom member each include a first tubing and a second tubing. The first and second tubings are insertable respectively into each other. The first and second tubings may have different cross sections or diameters so that the tubings can slide past each other. Further, the extendable front cross-support, extendable rear cross-support, extendable top member, and extendable bottom member may each further have a locking device to lock and unlock the first tubing to the second tubing. The locking device may be a quick-release pin. 
     According to another embodiment of an embodiment of the invention, the apparatus includes a stand or a cart, such as an A-Frame cart for storage and transport of components. An embodiment of the invention includes an A-frame cart that provides a strong, lightweight, and adjustable solution to the mounting and restraining of different components having a variety of shapes and sizes, and also accommodates special mounting requirements. The A-frame cart employs a telescopic structural-tubing design that enables the cart to be extended and collapsed both lengthwise and across its width, thereby allowing the cart to be extended to a larger size in order to accommodate larger components while being able to be collapsed to a smaller size to accommodate smaller components and also to reduce its space requirements between uses. The A-frame cart also includes a variable-position vertical support arm that allows the cart to conform to mounting requirements of smaller sized components. The A-frame cart has an interchangeable mounting bracket design that allows for the attachment of generic support brackets as well as specialized brackets designed to meet mounting requirements of specific components. Mounting holes for brackets can be found the entire length of the vertical support bars, allowing for a great number of brackets to be attached concurrently. The cart rests on wheels that enable mobility. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The subject matter of the application will be more readily understood from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Additionally, the left-most digit(s) of a reference number identifies the drawing in which the reference number first appears. 
         FIG. 1A  depicts an exemplary A-frame cart having been collapsed in both width and length in accordance with a first embodiment of the invention; 
         FIG. 1B  depicts the exemplary A-frame cart of  FIG. 1A  having been extended in width; 
         FIG. 1C  depicts the exemplary A-frame cart of  FIG. 1A  having been extended in width and in length 
         FIG. 1D  depicts the different parts of the exemplary A-frame cart of  FIGS. 1A-1C ; 
         FIG. 1E  depicts a side view of the exemplary A-frame cart of  FIGS. 1A-1C ; 
         FIG. 1F  depicts an end view of the exemplary A-frame cart of  FIGS. 1A-1C ; 
         FIG. 1G  depicts a top view of the exemplary A-frame cart of  FIGS. 1A-1C ; 
         FIGS. 2A-2C  depict enlarged views of the circled areas A-C of  FIG. 1D ; 
         FIG. 2D  depicts a cross-sectional view of cross-section DD of  FIG. 1E ; 
         FIG. 2E  depicts an enlarged view of the circled area E of  FIG. 1E ; 
         FIG. 2F  depicts an enlarged view of the circled area F of  FIG. 1F ; 
         FIG. 2G  depicts a cross-sectional view of cross-section GG of  FIG. 1G ; 
         FIGS. 2H-2J  depict enlarged views of the circled areas H-J of  FIG. 2G ; 
         FIGS. 2K-2M  depict enlarged views of the circled areas K-M of  FIGS. 1E and 2D ; 
         FIGS. 3A-3C  depict top, side, and isometric views of an exemplary top frame in accordance with an embodiment of the invention; 
         FIG. 3D  depicts an exemplary rotational stop in accordance with an embodiment of the invention; 
         FIG. 3E  depicts an exemplary cross frame in accordance with an embodiment of the invention; 
         FIG. 3F  depicts and exemplary rear male limiting collar in accordance with an embodiment of the invention; 
         FIG. 3G  depicts an end view of an exemplary front offset support in accordance with an embodiment of the invention; 
         FIG. 3H  depicts a cross-sectional view of cross-section AA of  FIG. 3G ; 
         FIG. 3I  depicts an exemplary top plunger in accordance with an embodiment of the invention; 
         FIG. 3J  depicts an exemplary rotational collar in accordance with an embodiment of the invention; 
         FIG. 3K  depicts an isometric view of an exemplary top vertical frame support in accordance with an embodiment of the invention; 
         FIG. 3L  depicts an end view of the exemplary vertical frame support top of  FIG. 3K ; 
         FIG. 3M  depicts a cross-sectional view of cross-section AA of  FIG. 3L ; 
         FIG. 3N  depicts a side view of the exemplary top plunger of  FIG. 3I ; 
         FIG. 3O  depicts a cross-sectional view of cross-section EE of  FIG. 3N ; 
         FIG. 4A  depicts a cross-sectional view of cross-section AA of  FIG. 3B ; 
         FIG. 4B  depicts an enlarged view of the circled area B of  FIG. 4A ; 
         FIG. 4C  depicts a cross-sectional view of cross-section CC of  FIG. 3A ; 
         FIG. 4D  depicts an enlarged view of the circled area D of  FIG. 4C ; 
         FIGS. 5A ,  5 B, and  5 C depicts different side views and an isometric view of an exemplary side support in accordance with an embodiment of the invention; 
         FIG. 6A  depicts an exemplary frame side support in accordance with an embodiment of the invention; 
         FIG. 6B  depicts an enlarged view of the circled area A of  FIG. 5A ; 
         FIG. 6C  depicts an exemplary front male limiting collar in accordance with an embodiment of the invention; 
         FIG. 6D  depicts an exemplary rotational collar in accordance with an embodiment of the invention; 
         FIGS. 7A and 7B  depict side and isometric views of an exemplary an extendable top or bottom member in accordance with an embodiment of the invention; 
         FIG. 8A  depicts a cross-sectional view of cross-section AA of  FIG. 7A ; 
         FIG. 8B  depicts an exemplary rear frame tubing in accordance with an embodiment of the invention; 
         FIG. 8C  depicts an exemplary rear tube stopper in accordance with an embodiment of the invention; 
         FIG. 9  depicts an exemplary rear cross frame in accordance with an embodiment of the invention; 
         FIGS. 10A ,  10 B, and  10 C depict different side views and an isometric view of an exemplary rear side support in accordance with an embodiment of the invention; 
         FIG. 11A  depicts an exemplary frame side support in accordance with an embodiment of the invention; 
         FIG. 11B  depicts an enlarged view of the circled area A of  FIG. 10A ; 
         FIG. 11C  depicts an exemplary rear female limiting collar in accordance with an embodiment of the invention; 
         FIG. 11D  depicts an exemplary rear side support collar in accordance with an embodiment of the invention; 
         FIG. 12  depicts an isometric view of an exemplary middle wheel mount in accordance with an embodiment of the invention; 
         FIG. 13A  depicts an exemplary wheel mounting plate in accordance with an embodiment of the invention; 
         FIG. 13B  depicts a side view of the exemplary middle wheel mount of  FIG. 12 ; 
         FIG. 13C  depicts a cross-sectional view of cross-section AA of  FIG. 13B ; 
         FIG. 14  depicts an exemplary front support in accordance with an embodiment of the invention; 
         FIG. 15A  depicts an end view of the exemplary front support of  FIG. 14 ; 
         FIG. 15B  depicts a side view of the exemplary front support of  FIG. 14 ; 
         FIG. 15C  depicts an exemplary male cross support in accordance with an embodiment of the invention; 
         FIG. 16  depicts an exemplary rear cross support in accordance with an embodiment of the invention; 
         FIG. 17A  depicts an end view of the exemplary rear cross support of  FIG. 16 ; 
         FIG. 17B  depicts a side view of the exemplary rear cross support of  FIG. 16 ; 
         FIG. 17C  depicts a cross-sectional view of cross-section AA of  FIG. 17B ; 
         FIG. 17D  depicts an isometric view of an exemplary folding sleeve insert in accordance with an embodiment of the invention; 
         FIG. 17E  depicts a side view of the exemplary folding sleeve insert of  FIG. 17D ; 
         FIG. 17F  depicts an end view of the exemplary folding sleeve insert of  FIG. 17D ; 
         FIG. 18  depicts another exemplary rear cross support in accordance with an embodiment of the invention; 
         FIG. 19A  depicts an end view of the exemplary rear cross support of  FIG. 18 ; 
         FIG. 19B  depicts a side view of the exemplary rear cross support of  FIG. 18 ; 
         FIG. 20  depicts another exemplary front support in accordance with an embodiment of the invention; 
         FIG. 21A  depicts a side view of the exemplary front support of  FIG. 20 ; 
         FIG. 21B  depicts another side view of the exemplary front support of  FIG. 20 ; 
         FIG. 21C  depicts a cross-sectional view of cross-section AA of  FIG. 21B ; 
         FIG. 22  depicts an isometric view of an exemplary outer wheel mount in accordance with an embodiment of the invention; 
         FIG. 23A  depicts a side view of the exemplary outer wheel mount of  FIG. 22 ; 
         FIG. 23B  depicts a cross-sectional view of cross-section AA of  FIG. 23A ; 
         FIG. 24  depicts an isometric view of an exemplary shelf post in accordance with an embodiment of the invention; 
         FIG. 25A  depicts a side view of the exemplary shelf post of  FIG. 24 ; 
         FIG. 25B  depicts an end view of the exemplary shelf post of  FIG. 24 ; 
         FIG. 25C  depicts a cross-sectional view of cross-sections AA of  FIGS. 25A and 25B ; 
         FIG. 26  depicts an isometric view of an exemplary bottom plunger in accordance with an embodiment of the invention; 
         FIG. 27A  depicts a side view of the exemplary bottom plunger of  FIG. 26 ; 
         FIG. 27B  depicts a cross-sectional view of cross-section AA of  FIG. 27A ; 
         FIG. 27C  depicts an isometric view of an exemplary bottom vertical frame support in accordance with an embodiment of the invention; 
         FIG. 27D  depicts a side view of the exemplary bottom vertical frame support of  FIG. 27C ; 
         FIG. 27E  depicts a cross-sectional view of cross-section AA of  FIG. 27D ; 
         FIG. 28A  depicts a top view of an exemplary strap in accordance with an embodiment of the invention; 
         FIG. 28B  depicts a side view of the exemplary strap of  FIG. 28A ; 
         FIG. 29A  depicts an isometric view of an exemplary bottom frame tubing in accordance with an embodiment of the invention; 
         FIG. 29B  depicts a side view of the exemplary bottom frame tubing of  FIG. 29A ; 
         FIG. 29C  depicts a cross-sectional view of cross-section AA of  FIG. 29B ; 
         FIG. 29D  depicts a cross-sectional view of cross-section BB of  FIG. 29B ; 
         FIG. 30A  depicts an isometric view of an exemplary collapsing sleeve insert in accordance with an embodiment of the invention; 
         FIGS. 30B and 30C  depict end and side views of the exemplary collapsing sleeve insert of  FIG. 30A , respectively; 
         FIG. 31  depicts an isometric view of an exemplary mating collar in accordance with an embodiment of the invention; 
         FIG. 32A-32C  depict isometric, end, and side views of an exemplary stabilator configured cart assembly in accordance with a second embodiment of an embodiment of the invention; 
         FIGS. 33A and 33B  depict enlarged views of the circled areas A and B of  FIGS. 32A and 32B ; 
         FIGS. 34A and 34B  depict isometric views of an exemplary exterior bracket assembly in accordance with an embodiment of the invention; 
         FIGS. 35A-C  depict isometric, end, and side views of an exemplary exterior bracket in accordance with an embodiment of the invention; 
         FIG. 36A  depicts an isometric view of an exemplary exterior stabilator mounting bracket in accordance with an embodiment of the invention; 
         FIG. 36B  depicts an isometric view of an exemplary exterior mounting gusset in accordance with an embodiment of the invention; 
         FIG. 36C  depicts an isometric view of an exemplary exterior mounting rib in accordance with an embodiment of the invention; 
         FIG. 37  depicts an isometric view of an exemplary mount rubber insert in accordance with an embodiment of the invention; 
         FIGS. 38A and 38B  depict top and side views of an exemplary base strap assembly in accordance with an embodiment of the invention; 
         FIGS. 39A and 39B  depict isometric and side views of an exemplary upper strap assembly in accordance with an embodiment of the invention; 
         FIG. 40A  depicts an isometric view of an exemplary upper strap mount in accordance with an embodiment of the invention; 
         FIGS. 40B and 40C  depict side and top views of an exemplary upper stabilator strap assembly in accordance with an embodiment of the invention; 
         FIGS. 41A and 41B  depict isometric views of an exemplary interior bracket assembly in accordance with an embodiment of the invention; 
         FIGS. 42A-C  depict isometric, end, and side views of an exemplary interior bracket in accordance with an embodiment of the invention; 
         FIG. 43A  depicts an isometric view of an exemplary interior stabilator mounting bracket in accordance with an embodiment of the invention; 
         FIG. 43B  depicts an isometric view of an exemplary interior mounting rib in accordance with an embodiment of the invention; 
         FIG. 44  depicts an isometric view of an exemplary base shelving assembly in accordance with an embodiment of the invention; 
         FIG. 45  depicts an isometric view of an exemplary secondary base shelving assembly in accordance with an embodiment of the invention; 
         FIG. 46A-46C  depict isometric, end, and side views of an exemplary drive shaft and tail rotor configured cart assembly in accordance with a third embodiment of an embodiment of the invention; 
         FIGS. 47A and 47B  depict enlarged views of the circled areas A and B of  FIGS. 46A and 46B ; 
         FIG. 48  depicts an isometric view of an exemplary top drive shaft mount assembly in accordance with an embodiment of the invention; 
         FIG. 49  depicts an isometric view of an exemplary top drive shaft mount in accordance with an embodiment of the invention; 
         FIG. 50A  depicts an isometric view of an exemplary top drive mounting plate in accordance with an embodiment of the invention; 
         FIG. 50B  depicts an isometric view of an exemplary support plate in accordance with an embodiment of the invention; 
         FIG. 50C  depicts an isometric view of an exemplary top support brace in accordance with an embodiment of the invention; 
         FIGS. 51A and 51B  depict side and top views of an exemplary upper drive shaft strap assembly in accordance with an embodiment of the invention; 
         FIGS. 52A and 52B  depict isometric views of an exemplary exterior shaft bracket assembly in accordance with an embodiment of the invention; 
         FIG. 53A  depicts an isometric view of an exemplary exterior shaft bracket in accordance with an embodiment of the invention; 
         FIG. 53B  depicts an isometric view of an exemplary strap tab in accordance with an embodiment of the invention; 
         FIG. 53C  depicts an isometric view of an exemplary strap retainer in accordance with an embodiment of the invention; 
         FIGS. 54A and 54B  depict isometric views of an exemplary interior tail rotor assembly in accordance with an embodiment of the invention; 
         FIGS. 55A and 55B  depict an isometric and an end view of an exemplary interior tail rotor bracket assembly in accordance with an embodiment of the invention; 
         FIG. 56  depicts an isometric view of an exemplary interior tail rotor bracket in accordance with an embodiment of the invention; and 
         FIGS. 57A and 57B  depict side and top views of an exemplary tail rotor strap assembly in accordance with an embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION 
     An embodiment of the invention will now be described more fully in detail with reference to the accompanying drawings are shown. This invention should not, however, be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete and will fully convey the scope of embodiments of the invention to those skilled in the art. Like numbers refer to like elements throughout. 
     An embodiment of the invention provides stable extendable apparatus to store and transport components. An example of such apparatus may include but is not limited to a cart, a stand, or the like. In one embodiment, the apparatus is an A-frame cart as depicted in the accompanying figures. The A-frame cart comprises telescopic structural-tubing that enables the cart to be extended and collapsed both lengthwise and across its width. The A-frame cart may include one or more variable-position vertical support arms that allow the cart to conform to mounting requirements of small components. The A-frame cart allows for the attachment of generic support brackets as well as specialized brackets designed to meet mounting requirements of specific components. Mounting holes for brackets can be found the entire length of the vertical support bars, allowing for a great number of brackets to be attached concurrently. 
     The cart rests on a movable device that enables mobility. An example of such movable device are wheel mechanisms. In another embodiment, the wheels comprise large run-flat caster-style tires, allowing the cart to operate on both finished and rough surfaces such as terrain. The wheels or tires may include locking mechanisms that can be locked to make the cart immobile or unlocked to allow the cart to move. 
     The cart may be converted into a stand. For example, the A-frame cart can also be converted to an immobile yet collapsible A-frame stand by replacing the tires with feet, legs, or other standing devices intended to enable the stand to remain in a fixed position. All the wheels or tires can be replaced with a standing device or the stand can also be configured such that a portion of the stand is fixed in place on a standing device while the extendable and collapsible portions have wheels allowing the stand to be extended and collapsed more easily. For example, an outer wheel mount  113  and an inner wheel mount  108  on one side of the stand could be replaced with legs that are fixed to a surface (e.g., bolted to a floor), where the remaining wheels could be used to extend and collapse the width and length of the stand. Additionally, if additional support is needed the portion of the rear and front cross supports  110 ,  112  could be configured with tubing that would be parallel to the bottom frame tubing  129  and extendable member  104 , which could also be used to support additional wheels that would be approximately half way between the back and front wheels when the cart  100  was extended in width fully. 
       FIG. 1A  depicts an exemplary A-frame cart  100  having been collapsed in both width and length in accordance with a first embodiment of the invention. When the A-frame cart  100  has been collapsed in both width and length, the space it requires is minimized and it is easier to maneuver. 
       FIG. 1B  depicts the exemplary A-frame cart  100  of  FIG. 1A  having been extended in width as indicated by the two lateral arrows  10 . By extending the width of the A-frame cart, additional stability is achieved making it less likely to tip over onto its side. 
       FIG. 1C  depicts the exemplary A-frame cart  100  of  FIG. 1A  having been extended in width and in length as indicated by the three longitudinal arrows  20 . By extending the length of the A-fame cart, larger components can be stored and transported, additional components can be stored and transported, or some combination thereof. Although the A-frame cart  100  as described herein is not able to extend or collapse its side supports or its top structure or frame (as indicated by side arrows  30  and by top arrows  40 ), one skilled in the art will recognize that the telescopic structural-tubing approach described herein could also be applied to the side supports of the A-frame cart and/or to its top frame. Moreover, the cart  100  could be configured to use a single tubing instead of a top frame comprising two tubings and a cross frame. The tubing could also be a table or platform like structure. Additionally, the top frame could have additional tubings such that instead of two parallel tubings there are three or more parallel tubings. 
       FIG. 1D  depicts the different parts of the exemplary A-frame cart  100  of  FIGS. 1A-1C . Referring to  FIG. 1D , A-frame cart  100  comprises a top structure or frame  101 , four side supports (a first front side support  102 , a second front side support  102 , a first rear side support  106 , and a second rear side support  106 ), at least one extendable top member and one opposing extendable bottom member  104 , a rear cross frame  105 , two middle wheel mounts  108 , at least a first and second front support  109  and  112 , a first rear cross support  110 , a second rear cross support  111 , four outer wheel mounts  113 , twelve rotational stops  114 , two shelf posts  118 , six wheels  125 , two bottom plungers  126 , four locking spring plungers  127 , four straps  128 , two bottom frame tubings  129 , and four collapsible sleeve inserts  130 . The two bottom plungers  126  are part of two moveable side support arms that can be positioned as desired on the two bottom frame tubings  129  and frame tubing of the top structure  101  in order to accommodate components of different lengths. 
     The two moveable side support arms do not have to be across from each other (as shown). Additional moveable side support arms can also be used and the use of such support is entirely optional. Moreover, one skilled in the art would recognize that similar supports could be used in conjunction with the at least one extendable top member and bottom member  104 . Alternatively, fixed or moveable side supports could be configured horizontally such that they attached to the vertically oriented side support  102 . Generally, all sorts of combinations are possible for use of fixed and moveable side supports. Similarly, different combinations of cross supports extending across the bottom frame tubings  129 , the bottom member  104 , the top member  104 , and/or the top structure are possible. 
     The telescopic structural tubing of the cart  100  of  FIGS. 1A-1C  is designed where a first tubing having an outer diameter fits within a second tubing having a inner diameter sized so that the first tubing will fit within the second tubing. One skilled in the art will recognize that the telescopic structural tubing of the cart  100  could include three or more such tubing sized to fit together to provide additional telescopic capabilities. In alternate embodiments, different cross-sectional shapes of the tubing may be used including circular tubing, rectangular tubing, and the like. The telescopic structural tubing of the cart  100  of  FIGS. 1A-1C  could alternatively be designed such that instead of the cart having one portion that collapses into the second portion from one side, the cart could have one portion that collapses into the second portion from one side and a third portion that collapses into the second portion from the other side. As such, the cart  100  would have eight wheels instead of six. 
     Also depicted in  FIG. 1D  are three circled areas A-C, which are shown in enlarged views in  FIGS. 2A-2C . An extendable front cross-support comprises the first front support  109  and the second front support  112  to couple the side supports  102 . Similarly, an extendable rear cross-support opposed to the front cross-support includes a first rear cross support  110  and a second rear cross support  111 . As can be seen in  FIG. 1D , the at least one extendable top member and one opposing extendable bottom member  104  are sized such they can slide within the top and bottom structures to enable the A-frame cart  100  to be extended or collapsed along its length. Similarly, the two first front supports  109  are sized to slide within the two second front supports  112  and the second rear cross support  111  is sized to slide within the first rear cross support  110  thereby enabling the A-frame cart  100  to be extended or collapsed along its width. 
       FIG. 1E  depicts a side view of the exemplary A-frame cart  100  of  FIGS. 1A-1C . Shown are side views of the middle wheel mount  108  and the outer wheel mount  113 . Also shown is a cross section DD, and circled areas E and M, which are further depicted in  FIGS. 2D ,  2 E and  2 M, respectively. 
       FIG. 1F  depicts an end view of the exemplary A-frame cart  100  of  FIGS. 1A-1C . Shown is a circled area F for which an enlarged view is provided in  FIG. 2F . 
       FIG. 1G  depicts a top view of the exemplary A-frame cart  100  of  FIGS. 1A-1C . Shown is a cross section GG, which is also depicted in  FIG. 2G . 
       FIGS. 2A-2C  depict enlarged views of the circled areas A-C of  FIG. 1D . Referring to  FIG. 2A , a quick-release pin  116  is shown partially inserted into a hole in the side of the second front support  112 . A loop-tab/lanyard/wire rope assembly  119  is depicted attached to the quick-release pin  116 . In alternate embodiments, other locking mechanisms may be used in place of the quick-release pin  116 . A pan head machine screw  120  and a flat washer  121  attaching one end of the wire rope of the loop-tab/lanyard/wire rope assembly  119  to the second front support  112  thereby allowing the quick-release pin  116  to hang loose when not inserted into the second front support  112 . 
     Referring to  FIG. 2B , a an extendable bottom member  104  is shown inserted into a rotational stop  114 . The wheel  125  is fixed onto outer wheel mount  113 , for example using a hex head cap screw  123 , a flat washer  122 , and a locknut  124  to bolt the wheel  125 . Other fixing mechanisms may be contemplated. 
     Referring to  FIG. 2C , a collapsing sleeve insert  130  is shown inserted into a rotational stop  114  and is also shown being attached to a mating collar  132  using flat washers  133  and pan head machine screws  134 . 
       FIG. 2D  depicts a cross-sectional view of cross-section DD of  FIG. 1E . Shown are circled areas K and L for which enlarged views are provided in  FIGS. 2K and 2L , respectively. 
       FIG. 2E  depicts an enlarged view of the circled area E of  FIG. 1E , whereby a part of the top structure  101  that is extending downward is shown abutting a bottom plunger  126 . 
       FIG. 2F  depicts an enlarged view of the circled area F of  FIG. 1F , where an outer wheel mount  113  is shown in front of and substantially in line with a middle wheel mount  108 . Also shown are two shelf posts  118  beneath the two front supports  109 , where the top portion of a shelf post  118  that is behind the nearest shelf post  118  can be seen as viewed from a point slightly above the nearest shelf post  118 . 
       FIG. 2G  depicts a cross-sectional view of cross-section GG of  FIG. 1G . Shown are circled areas H, I, and J for which enlarged views are provided in  FIGS. 2H-2J , respectively. 
       FIGS. 2H-2J  depict enlarged views of the circled areas H-J of  FIG. 2G , which correspond to where the wheels  125  are mounted to one side of the cart  100 . Referring to  FIG. 2H , a side support  102  intersects with the bottom frame tubing near a front support  109  just above and to the right of outer wheel mount  113 . Referring to  FIG. 2I , a side support  102  intersects with the bottom frame tubing near a front support  109  just above and to the right of the middle wheel mount  108 . The extendable member  104  can be seen inside a collapsing sleeve insert  130 . Referring to  FIG. 2J , a rear side support  106  intersects with the extendable member  104  near a rear cross support  111  just above and to the left of the outer wheel mount  113 . A rotational stop  114 , which is intended to restrain movement, is also shown about extendable member  104 . 
       FIGS. 2K-2M  depict enlarged views of the circled areas K-M of  FIGS. 1E and 2D . Referring to  FIG. 2K , the enlarged view of circled area K shows the intersection of a top portion of a moveable side support with the tubing of the top structure  101 . A portion of a cross frame of the top structure  101  can be seen behind the intersection of the side support and tubing. Referring to  FIG. 2L , the enlarged view of circled area L shows the intersection of a bottom portion of a moveable side support with the bottom frame tubing  129 . A portion of a shelve post  118  and a portion of the middle wheel mount  108  can be seen behind the intersection of the side support and tubing. Referring to  FIG. 2M , the enlarged view of circled area M shows a side support attached to top frame such that it can rotate next to a rotational stop  114  that restricts movement. Also shown is a portion of a collapsing sleeve insert  130 . 
       FIGS. 3A-3C  depict top, side, and isometric views of an exemplary top structure  101  in accordance with an embodiment of the invention. Top structure  101  comprises two bottom frame tubing  129 , two cross frames  302 , and two top plungers  303 , which correspond to the top portions of moveable side supports previously described. A cross section AA is shown in  FIG. 3B , which is further depicted in  FIG. 4A . A cross-section CC is shown in  FIG. 3A , which is further depicted in  FIG. 4C . Also shown in  FIGS. 3A-3C  are several rotational stops  114  that can be positioned as desired to restrain movement of objects associated with the bottom frame tubing. For example, in  FIG. 47A , rotational stops are used to restrain movement of top drive shaft mounts. 
       FIG. 3D  depicts an exemplary rotational stop in accordance with an embodiment of the invention. Various sizes of rotational stops having different inside inner and outer diameters are used with an embodiment of the invention to accommodate different sized tubing. Generally, rotational stops are used alongside rotating collars and the like that rotate about the tubing making up the framing of the cart, etc. The rotational stops allow rotation necessary to collapse or extend the width of the cart  100  but restrain the collars from sliding down the tubing. Rotational stops can also be used to restrain movement of other objects attached to the tubing such as the top drive shaft mounts of  FIG. 47A . 
       FIG. 3E  depicts an exemplary cross frame  302  in accordance with an embodiment of the invention, which comprises two rear male limiting collars  306  which reside on each end of a front offset support  307 . 
       FIG. 3F  depicts and exemplary rear male limiting collar  306  in accordance with an embodiment of the invention. The notch portion of the collar  306  allows a range of movement when used with a side support  102 , where the range of movement corresponds to the rotation of the side support relative to the tubing when the width of the cart is extended or collapsed. 
       FIG. 3G  depicts an end view of an exemplary front offset support in accordance with an embodiment of the invention. Seen in  FIG. 3G  is a cross-section AA, which is shown in  FIG. 3H . 
       FIG. 3H  depicts a cross-sectional view of cross-section AA of  FIG. 3G . 
       FIG. 3I  depicts an exemplary top plunger  303  in accordance with an embodiment of the invention, which comprises a rotational collar  308  and a top vertical frame support  309 . The top plunger  303  is configured to combine with bottom plunger  126  to provide a moveable side support. 
       FIG. 3J  depicts an exemplary rotational collar  308  in accordance with an embodiment of the invention, which includes a hole for a threaded boss  310  shown in  FIGS. 3I ,  3 N and  3 O. 
       FIG. 3K  depicts an isometric view of an exemplary top vertical frame support  309  in accordance with an embodiment of the invention an embodiment of the invention. The top vertical frame support has mounting holes down its length that allow for quick-release pins to be used to support various types of attachments (e.g., brackets, straps, etc.). 
       FIG. 3L  depicts an end view of the exemplary top vertical frame support  309  of  FIG. 3K . Seen in  FIG. 3L  is a cross-section AA, which is shown in  FIG. 3M . 
       FIG. 3M  depicts a cross-sectional view of cross-section AA of  FIG. 3L . 
       FIG. 3N  depicts a side view of the exemplary top plunger  303  of  FIG. 3I , which comprises rotational collar  308 , top vertical frame support  309 , and threaded boss  310 . Seen in  FIG. 3N  is a cross-section EE, which is shown in  FIG. 3O . 
       FIG. 3O  depicts a cross-sectional view of cross-section EE of  FIG. 3N . 
       FIG. 4A  depicts a cross-sectional view of cross-section AA of  FIG. 3B . Shown is circular region B which is enlarged in  FIG. 4B . 
       FIG. 4B  depicts an enlarged view of the circled area B of  FIG. 4A . As shown, the two top plungers  303  are able to rotate around bottom frame tubing  129 . A portion of a cross frame  302  can be seen behind the two top plungers  303 . 
       FIG. 4C  depicts a cross-sectional view of cross-section CC of  FIG. 3A . Seen in  FIG. 4C  is a circled area D, which is enlarged in  FIG. 4D . 
       FIG. 4D  depicts an enlarged view of the circled area D of  FIG. 4C , which shows the bottom frame tubing  129  within a rear male limiting collar  306 . 
       FIGS. 5A ,  5 B, and  5 C depict different side views and an isometric view of an exemplary side support  501  in accordance with an embodiment of the invention an embodiment of the invention. The side support  501  comprises a frame side support  501 , a front female limiting collar,  502 , and a rotational collar  503 . Shown in  FIG. 5A  is a circled area A that is enlarged in  FIG. 6B . Although the side support  501  is shown having a fixed length it could instead be configured using multiple tubing having different sizes to enable telescopic behavior. 
       FIG. 6A  depicts an exemplary frame side support  501  in accordance with an embodiment of the invention. The side support  501  has mounting holes down its length that enable quick release pins to attach objects to the side support such as brackets and the like. 
       FIG. 6B  depicts an enlarged view of the circled area A of  FIG. 5A . 
       FIG. 6C  depicts an exemplary front female limiting collar  502  in accordance with an embodiment of the invention. The notch portion of the collar  502  allows a range of movement when used with a cross frame  302 , where the range of movement corresponds to the rotation of the side support relative to the tubing when the width of the cart is extended or collapsed. 
       FIG. 6D  depicts an exemplary rotational collar  503  in accordance with an embodiment of the invention. The rotational collar  503  of  FIG. 6D  is very similar to the rotational collar  308  of  FIG. 3J  except it does not include a hole for a threaded boss. 
       FIGS. 7A and 7B  depict side and isometric views of an exemplary an extendable top or bottom member  104  in accordance with an embodiment of the invention, which comprises a rear frame tubing  701 , a rear tube stopper  702 , and a flat head machine screw  703 . Seen in  FIG. 7A  is a cross-section AA, which is shown in  FIG. 8A . 
       FIG. 8A  depicts a cross-sectional view of cross-section AA of  FIG. 7A . 
       FIG. 8B  depicts an exemplary rear frame tubing  701  in accordance with an embodiment of the invention. 
       FIG. 8C  depicts an exemplary rear tube stopper  702  in accordance with an embodiment of the invention. 
       FIG. 9  depicts an exemplary rear cross frame  105 , in accordance with an embodiment of the invention, which is similar to the cross frame  302  except its male limiting collars have smaller inside diameters to accommodate the smaller outer diameter of the extendable member  104 . 
       FIGS. 10A ,  10 B, and  10 C depict different side views and an isometric view of an exemplary rear side support  106  in accordance with an embodiment of the invention, which comprises a frame side support  1001 , rear female limiting collar  1002 , and rear side support collar  1003 .  FIG. 10A  includes a circled area A that is enlarged in  FIG. 11B . 
       FIG. 11A  depicts an exemplary frame side support  1001  in accordance with an embodiment of the invention. 
       FIG. 11B  depicts an enlarged view of the circled area A of  FIG. 10A . 
       FIG. 11C  depicts an exemplary rear female limiting collar  1002  in accordance with an embodiment of the invention. The rear female limiting collar  1002  of  FIG. 11C  is similar to the rear female limiting collar  502  of  FIG. 6C  except it has a smaller inside diameter or cross-section intended to accommodate the smaller outer diameter or cross-section of extendable member  104 . The notch portion of the collar  1002  allows a range of movement when used with a rear cross frame  105 , where the range of movement corresponds to the rotation of the rear side support relative to the tubing when the width of the cart is extended or collapsed. 
       FIG. 11D  depicts an exemplary rear side support collar  1003  in accordance with an embodiment of the invention. The rear side support collar  1003  of  FIG. 11D  is similar to the rear side support collar  503  of  FIG. 6D  except it has a smaller inside diameter intended to accommodate the smaller outer diameter of extendable member  104 . 
       FIG. 12  depicts an isometric view of an exemplary middle wheel mount  108  in accordance with an embodiment of the invention, which comprises a wheel mounting plate and wheel mount tubing. 
       FIG. 13A  depicts an exemplary wheel mounting plate  1301  in accordance with an embodiment of the invention. 
       FIG. 13B  depicts a side view of the exemplary middle wheel mount  108  of  FIG. 12 . Shown in  FIG. 31B  is a cross-section AA, which is depicted in  FIG. 13C . 
       FIG. 13C  depicts a cross-sectional view of cross-section AA of  FIG. 13B . 
       FIG. 14  depicts an exemplary front support  109  in accordance with an embodiment of the invention. 
       FIG. 15A  depicts an end view of the exemplary front support  109  of  FIG. 14 , where a male cross support  1502  is attached to a rotational collar  503  having an inside diameter sized to rotate about the bottom frame tubing. The outside diameter of the male cross support  1502  is sized to fit inside a female cross support  1702 . 
       FIG. 15B  depicts a side view of the exemplary front support of  FIG. 14 . 
       FIG. 15C  depicts an exemplary male cross support  1502  in accordance with an embodiment of the invention. 
       FIG. 16  depicts an exemplary rear cross support  110  in accordance with an embodiment of the invention. 
       FIG. 17A  depicts an end view of the exemplary rear cross support  110  of  FIG. 16 , where a female cross support  1702  is attached to a rotational collar  1003  having an inside diameter sized to rotate about the extendable member  104 . The inside diameter of the female cross support  1702  is sized to accept a male cross support  1502 . 
       FIG. 17B  depicts a side view of the exemplary rear cross support of  FIG. 16 . Seen in  FIG. 17B  is a cross-section AA, which is depicted in  FIG. 17C . The inside diameter of the rear side support collar  1003  is sized to rotate about the extendable member  104 . 
       FIG. 17C  depicts a cross-sectional view of cross-section AA of  FIG. 17B , which shows a folding sleeve insert  1703 , a pan head machine screw  1704 , and a flat washer  1705 . 
       FIG. 17D  depicts an isometric view of an exemplary folding sleeve insert  1703  in accordance with an embodiment of the invention. 
       FIG. 17E  depicts a side view of the exemplary folding sleeve insert  1703  of  FIG. 17D . 
       FIG. 17F  depicts an end view of the exemplary folding sleeve insert  1703  of  FIG. 17D . 
       FIG. 18  depicts another exemplary rear cross support  111  in accordance with an embodiment of the invention. 
       FIG. 19A  depicts an end view of the exemplary rear cross support  111  of  FIG. 18 , where a male cross support  1502  is attached to a rotational collar  1003  having an inside diameter sized to rotate about the extendable member  104 . The diameter of the male cross support  1502  is sized to allow it to fit within female cross support  1702 . 
       FIG. 19B  depicts a side view of the exemplary rear cross support  111  of  FIG. 18 . 
       FIG. 20  depicts another exemplary second front support  112  in accordance with an embodiment of the invention. 
       FIG. 21A  depicts an end view of the exemplary second front support  112  of  FIG. 20 , where a female cross support  1702  is attached to a rotational collar  503  having an inside diameter sized to rotate about the bottom frame tubing  129 . The diameter of the female cross support  1702  is sized to accept a male cross support  1502 . 
       FIG. 21B  depicts a side view of the exemplary second front support  112  of  FIG. 20 . Seen in  FIG. 21B  is a cross-section AA, which is depicted in  FIG. 21C . 
       FIG. 21C  depicts a cross-sectional view of cross-section AA of  FIG. 21B , which shows a folding sleeve insert  1703 , a pan head machine screw  1704 , and a flat washer  1705 . 
       FIG. 22  depicts an isometric view of an exemplary outer wheel mount in accordance with an embodiment of the invention, which comprises a wheel mounting plate  1301  and wheel mount tubing  1302 . 
       FIG. 23A  depicts a side view of the exemplary outer wheel mount of  FIG. 22 . Seen in  FIG. 23A  is a cross-section AA, which is depicted in  FIG. 23B . 
       FIG. 23B  depicts a cross-sectional view of cross-section AA of  FIG. 23A . 
       FIG. 24  depicts an isometric view of an exemplary shelf post  118  in accordance with an embodiment of the invention. 
       FIG. 25A  depicts a side view of the exemplary shelf post  118  of  FIG. 24 . Seen in  FIG. 25A  is a cross-section AA, which is depicted in  FIG. 25C . 
       FIG. 25B  depicts an end view of the exemplary shelf post  118  of  FIG. 24 . Seen in  FIG. 25B  is a cross-section AA, which is depicted in  FIG. 25C . 
       FIG. 25C  depicts a cross-sectional view of cross-sections AA of  FIGS. 25A and 25B . 
       FIG. 26  depicts an isometric view of an exemplary bottom plunger  126  in accordance with an embodiment of the invention. 
       FIG. 27A  depicts a side view of the exemplary bottom plunger  126  of  FIG. 26 , which comprises a rotational collar  308 , a threaded boss  310 , and a bottom vertical frame support  2702 . Seen in  FIG. 27A  is a cross-section AA, which is depicted in  FIG. 27B . 
       FIG. 27B  depicts a cross-sectional view of cross-section AA of  FIG. 27A . 
       FIG. 27C  depicts an isometric view of an exemplary bottom vertical frame support  2702  in accordance with an embodiment of the invention. The bottom vertical frame support  2702  has mounting holes down its length for use with brackets and the like. 
       FIG. 27D  depicts an end view of the exemplary bottom vertical frame support  2702  of  FIG. 27C . Seen in  FIG. 27D  is a cross-section AA, which is depicted in  FIG. 27E . 
       FIG. 27E  depicts a cross-sectional view of cross-section AA of  FIG. 27D . 
       FIG. 28A  depicts a top view of an exemplary strap  128  in accordance with an embodiment of the invention. 
       FIG. 28B  depicts a side view of the exemplary strap  128  of  FIG. 28A . 
       FIG. 29A  depicts an isometric view of an exemplary bottom frame tubing  129  in accordance with an embodiment of the invention; 
       FIG. 29B  depicts a side view of the exemplary bottom frame tubing  129  of  FIG. 29A . Seen in  FIG. 29B  are cross-sections AA and BB, which are depicted in  FIG. 29C  and  FIG. 29D , respectively. 
       FIG. 29C  depicts a cross-sectional view of cross-section AA of  FIG. 29B . 
       FIG. 29D  depicts a cross-sectional view of cross-section BB of  FIG. 29B . 
       FIG. 30A  depicts an isometric view of an exemplary collapsing sleeve insert  130  in accordance with an embodiment of the invention. 
       FIGS. 30B and 30C  depict end and side views of the exemplary collapsing sleeve insert  130  of  FIG. 30A , respectively. 
       FIG. 31  depicts an isometric view of an exemplary mating collar  132  in accordance with an embodiment of the invention. Mating collar  132  is attached, or mated with collapsing sleeve insert  130  as depicted in  FIG. 2C . 
     The A-frame cart  100  of the invention can be configured using interchangeable brackets to accommodate different storage and transport requirements of objects having different shapes and sizes. Described below are two examples of how such interchangeable brackets can be used for transporting aircraft stabilator, drive shaft, tail rotor, etc. Specifically, descriptions of an exemplary cart assembly configured for transporting stabilator and of an exemplary cart assembly configured for transporting drive shaft and tail rotor are provided. One skilled in the art will recognize that in accordance with an embodiment of the invention the A-frame cart  100  can be configured in numerous other ways as appropriate to accommodate many different objects of different sizes and shapes. 
       FIG. 32A-32C  depict isometric, end, and side views of an exemplary stabilator configured cart assembly  3200  in accordance with a second embodiment of an embodiment of the invention. Referring to  FIG. 32A , the stabilator configured cart assembly  3200  comprises an A-frame cart  100 , eight exterior bracket assemblies  3202 , sixteen upper strap assemblies  3203 , eight inner bracket assemblies  3204 , a base shelf assembly  3205 , and a secondary base shelf assembly  3206 . Seen in  FIG. 32A  is circled area A, which is depicted in  FIG. 33A . Seen in  FIG. 32B  is circled area B, which is depicted in  FIG. 33B . Side views of stabilator components  3212  and  3214  are provided in  FIG. 32C . 
       FIGS. 33A and 33B  depict enlarged views of the circled areas A and B of  FIGS. 32A and 32B , respectively. Referring to  FIG. 33A , pan head machine screws  3208  and flat washers  3210  are shown being used to attach the base shelf assembly  3205  to the second front support  112 . Referring to  FIG. 33B , exterior and interior bracket assemblies  3202 ,  3204  are attached to a side support  102  using quick release pins  116  that are attached to lanyard/wire rope/loop tab assemblies  119  using pan head machine screws  120  and flat washers  121  in a manner like that shown in  FIG. 2A . 
       FIGS. 34A and 34B  depict isometric views of an exemplary exterior bracket assembly  3202  in accordance with an embodiment of the invention. Referring to  FIGS. 34A and 34B , exterior bracket assembly  3202  comprises an exterior bracket  3401 , a rubber insert  3402 , a base strap assembly  3403 , a nylon-insert locknut  3404 , and a flat head machine screw  703 . The assembly is attached to a side support  102  using a quick release pin  116  that is attached to lanyard/wire rope/loop tab assembly  119  using a pan head machine screw  120  and a flat washer  121 . 
       FIGS. 35A-C  depict isometric, end, and side views of an exemplary exterior bracket  3401  in accordance with an embodiment of the invention. The exterior bracket  3401  comprises an exterior stabilator mounting bracket  3501 , two mounting gussets  3502 , and two exterior mounting ribs. 
       FIG. 36A  depicts an isometric view of an exemplary exterior stabilator mounting bracket  3501  in accordance with an embodiment of the invention. 
       FIG. 36B  depicts an isometric view of an exemplary exterior mounting gusset  3502  in accordance with an embodiment of the invention. 
       FIG. 36C  depicts an isometric view of an exemplary exterior mounting rib  3503  in accordance with an embodiment of the invention. 
       FIG. 37  depicts an isometric view of an exemplary rubber insert  3402  in accordance with an embodiment of the invention. 
       FIGS. 38A and 38B  depict top and side views of an exemplary base strap assembly  3403  in accordance with an embodiment of the invention. Referring to  FIG. 38A , the base strap assembly  3403  comprises a straight shape end mounting plate  3801 , a nylon strap  3802 , and a female buckle  3803 . 
       FIGS. 39A and 39B  depict isometric and side views of an exemplary upper strap assembly  3203  in accordance with an embodiment of the invention. Referring to  FIGS. 39A and 39B , the upper strap assembly  3203  comprises an upper strap mount  3901 , an upper stabilator strap assembly  3902 , a flat head machine screw  703 , and a nylon-insert locknut  3404 . The upper strap assembly  3203  attaches to a side support  102  using a quick-pin  116 , a lanyard/wire rope/loop-tab assembly  119 , a pan head machine screw  120 , and a flat washer  121 . 
       FIG. 40A  depicts an isometric view of an exemplary upper strap mount  3901  in accordance with an embodiment of the invention. 
       FIGS. 40B and 40C  depict side and top views of an exemplary upper stabilator strap assembly  3902  in accordance with an embodiment of the invention. The upper stabilator strap assembly  3902  comprises a nylon strap  4001 , a male buckle  4002 , and a strap end mounting plate  4003 . 
       FIGS. 41A and 41B  depict isometric views of an exemplary interior bracket assembly  3204  in accordance with an embodiment of the invention. The interior bracket assembly  3204  comprises an interior bracket  4101 , an interior rubber insert  4102 , a flat head machine screw  703 , a nylon-insert locknut  3404 , and a base strap assembly  3403 . 
       FIGS. 42A-C  depict isometric, end, and side views of an exemplary interior bracket  4101  in accordance with an embodiment of the invention. The interior bracket  4101  comprises an interior bracket  4201 , two mounting gussets  3502 , and two interior mounting ribs  4203 . 
       FIG. 43A  depicts an isometric view of an exemplary interior stabilator mounting bracket  4201  in accordance with an embodiment of the invention. 
       FIG. 43B  depicts an isometric view of an exemplary interior mounting rib  4203  in accordance with an embodiment of the invention. 
       FIG. 44  depicts an isometric view of an exemplary base shelving assembly  3205  in accordance with an embodiment of the invention. Referring to  FIG. 44 , the base shelving assembly  3205  comprises a base shelf  4401  and a shelf rubber  4403  (e.g., Buna-N-Foam). Also shown in  FIG. 44  are two quick release pins  116 , two lanyard/wire rope/loop-tab assemblies  119 , two pan head machine screws  120 , and two flat washers  121  that are used to attach the base shelving assembly  3205  to the bottom frame tubing  129 . 
       FIG. 45  depicts an isometric view of an exemplary secondary base shelving assembly  3206  in accordance with an embodiment of the invention. Referring to  FIG. 45 , the secondary base shelving assembly  3206  is just like the base shelving assembly  3205  of  FIG. 44  except it has a secondary base shelf  4501  in place of the base shelf  4401  used in the base shelving assembly  3205 . 
       FIG. 46A-46C  depict isometric, end, and side views of an exemplary drive shaft and tail rotor configured cart assembly  4600  in accordance with a third embodiment of an embodiment of the invention. The drive shaft and tail rotor configured cart assembly  4600  comprises an A-frame cart  100 , two top drive shaft mount assemblies  4602 , twenty exterior shaft bracket assemblies  4603 , and eight interior tail rotor assemblies. It should be noted that the bottom plungers  126  and the top plungers  303  of the moveable side support arm are configured to provide support independent of each other, where the bottom plungers  126  have been rotated 180° such that angle outwards from the drive shaft and tail rotor configured cart assembly  4600 . Shown stored in the cart assembly  4600  are small drive shaft assemblies  4610 , shafts  4612 , large drive shaft assemblies  4614 , rotary wing blades  4616 , and fan shaft assemblies  4618 . Seen in  FIG. 46A  is a circled area A, which is depicted in  FIG. 47A . Seen in  FIG. 46B  is a circled area B, which is depicted in  FIG. 47B . 
       FIGS. 47A and 47B  depict enlarged views of the circled areas A and B of  FIGS. 46A and 46B , respectively. Referring to  FIG. 47A , a top drive shaft mount assembly  4602  is shown attached to top structure  101 . Referring to  FIG. 47B , exterior shaft bracket assemblies  4603  and an interior tail rotor assembly  4604  are attached to a side support  102  using quick release pins  116  that are attached to lanyard/wire rope/loop tab assemblies  119  using pan head machine screws  120  and flat washers  121  in a manner like that shown in  FIG. 2A . 
       FIG. 48  depicts an isometric view of an exemplary top drive shaft mount assembly  4602  in accordance with an embodiment of the invention. Referring to  FIG. 48 , top drive shaft mount assembly  4602  comprises a top drive shaft mount  4801 , two rubber inserts  3402 , an upper drive shaft strap assembly  4803 , a base strap assembly  3403 , two flat head machine screws  4810 , and two nylon-insert locknuts  3404 . The top drive shaft mount assembly  4602  attaches to the top structure  101  at four locations using a quick-pin  116 , a lanyard/wire rope/loop-tab assembly  119 , a pan head machine screw  120 , and a flat washer  121  at each location. 
       FIG. 49  depicts an isometric view of an exemplary top drive shaft mount  4801  in accordance with an embodiment of the invention. Referring to  FIG. 49 , top drive shaft mount  4801  comprises two top shaft mounting plates  5001 , two support plates  5002 , and four top support braces  5003 . 
       FIG. 50A  depicts an isometric view of an exemplary top drive mounting plate  5001  in accordance with an embodiment of the invention. 
       FIG. 50B  depicts an isometric view of an exemplary support plate  5002  in accordance with an embodiment of the invention. 
       FIG. 50C  depicts an isometric view of an exemplary top support brace  5003  in accordance with an embodiment of the invention. 
       FIGS. 51A and 51B  depict side and top views of an exemplary upper drive shaft strap assembly  4803  in accordance with an embodiment of the invention. The upper drive shaft strap assembly  4803  comprises a nylon strap  4001 , a male buckle  4002 , and a strap end mounting plate  4003  and is a shorter version of the upper stabilator strap assembly  3902  described in relation to  FIGS. 40A-40C . 
       FIGS. 52A and 52B  depict isometric views of an exemplary exterior shaft bracket assembly  4603  in accordance with an embodiment of the invention. The exterior shaft bracket assembly  4603  comprises an exterior shaft bracket  5201 , a rubber insert  3402 , a strap tab  5203 , a strap retainer  5204 , a replacement strap  5205 , and two flat head metal screws  4810 . The exterior shaft bracket assembly  4603  is attached to a side support  102  using a quick-pin  116 , a lanyard/wire rope/loop-tab assembly  119 , a pan head machine screw  120 , and a flat washer  121 . 
       FIG. 53A  depicts an isometric view of an exemplary exterior shaft bracket  5201  in accordance with an embodiment of the invention. 
       FIG. 53B  depicts an isometric view of an exemplary strap tab  5203  in accordance with an embodiment of the invention. 
       FIG. 53C  depicts an isometric view of an exemplary strap retainer  5204  in accordance with an embodiment of the invention. 
       FIGS. 54A and 54B  depict isometric views of an exemplary interior tail rotor assembly  4604  in accordance with an embodiment of the invention. The interior tail rotor assembly  4604  comprises an interior tail rotor bracket assembly  5401 , a rubber insert  3402 , two flat head machine screws  4810 , two nylon-insert locknuts  3404 , a base strap assembly  3403 , and a tail rotor strap assembly  5506 . The interior tail rotor assembly  4603  is attached to a side support  102  using a quick-pin  116 , a lanyard/wire rope/loop-tab assembly  119 , a pan head machine screw  120 , and a flat washer  121 . 
       FIGS. 55A and 55B  depict an isometric and an end view of an exemplary interior tail rotor bracket assembly  5401  in accordance with an embodiment of the invention. The interior tail rotor bracket assembly  5401  comprises an interior tail rotor bracket  5501  and two mounting gussets  3502 . 
       FIG. 56  depicts an isometric view of an exemplary interior tail rotor bracket  5501  in accordance with an embodiment of the invention. 
       FIGS. 57A and 57B  depict side and top views of an exemplary tail rotor strap assembly  5506  in accordance with an embodiment of the invention. The tail rotor strap assembly  5506  comprises a nylon strap  4001 , a male buckle  4002 , and a strap end mounting plate  4003  and is a shorter version of the upper stabilator strap assembly  3902  described in relation to  FIGS. 40A-40C  and a slightly longer version of the drive shaft strap assembly  4803  of  FIGS. 51A and 51B . 
     Under one arrangement, an A-frame cart  100  includes one or more attachment mechanisms (e.g., a trailer hitch and ball) for attaching one cart  100  to another cart  100  and/or allowing a cart to be attached to a vehicle (e.g., a fork lift). An attachment mechanism could be configured to pivot where it is attached to the cart  100 . An A-frame cart might be configured with a winch mechanism. 
     Under another arrangement enclosed compartments can be attached to the cart  100  and used for storage of components. 
     Under still another arrangement the top portion of the cart (i.e., the top frame) could be configured to be capable of spreading apart so as to allow a component to be lowered into the interior of the cart  100 . Similarly, the bottom portion of the cart could be configured to be able to capable of spreading apart so as to allow the cart to roll across and straddle a component prior to the bottom portion being secured. The cart could comprise pulleys and associated cabling. 
     Under a further arrangement, fixed panels can be attached to the cart  100  in various configurations to provide shelving, to constrain movement of stored components, to provide additional attachment locations (e.g., peg board), or to serve some other desired purpose. Similarly, flexible materials such as tarps, netting, and the like can be attached to the cart in various configurations to constrain movement of stored components, to provide additional attachment locations, or to serve other desired purposes. Generally, many different forms of attachment such as bungee cords, Velcro, ropes, magnets, adhesives, hooks, snaps, knobs, nuts and bolts, and the like can be used to secure objects to the cart  100 . Moreover, many different well known methods for reducing friction between parts of the cart  100 , reducing noise, increasing or decreasing visibility, and the like can be employed, as appropriate. 
     Under yet another arrangement, the A-frame cart  100  is equipped with a communications apparatus (e.g., a transmitter and/or receiver) for communicating its position or the status of one or more components stored on the cart  100 . 
     It will be understood that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims, an embodiment of the invention an embodiment of the invention.