Cargo pallet with extruded slot

Abstract

A panel structure comprised of a plurality of extruded aluminum panel members. The aluminum panel members are joined together into a single structure by a friction stir welding process and at least one of the extruded aluminum panel members includes an extruded slot running along an entire length of the at least one of the extruded aluminum panel members. The extruded slots are used to attach hooks or other suitable retaining devices for securing objects to the panel structure or to directly attach structural elements or modules to the panel structure.

Claims

1. A panel structure comprised of a plurality of extruded aluminum panel members, wherein the extruded aluminum panel members are joined together into a single structure by a friction stir welding process, wherein at least one of the extruded aluminum panel members includes an extruded slot running along an entire length of the at least one of the extruded aluminum panel members, wherein at least one of the extruded aluminum panel members includes an upper panel and a lower panel, and wherein the upper panel and the lower panel are connected to each other by a plurality of webbing members, and wherein the extruded slot is positioned at a point where one of the plurality of webbing members meets the upper panel.

2. The panel structure of claim 1, wherein the extruded slot is a T-shape configuration.

3. The panel structure of claim 1, wherein the extruded slot is configured to provide a consistent catch type structure for connecting a grappling structure at any point along the length of the extruded slot.

4. The panel structure of claim 1, wherein the extruded slot is configured to allow objects to be removably fastened to the panel structure.

5. The panel structure of claim 1, wherein the extruded slot comprises a configuration that matches a grappling structure of a cargo retaining member.

6. The panel structure of claim 1, wherein the panel structure is able to accommodate modular mounted surface structures attached to at least one point along the extruded slot.

7. An extruded aluminum panel member, wherein the extruded aluminum panel member is configured to be joined to at least one other extruded aluminum panel member by a friction stir welding process, wherein the extruded aluminum panel member includes an extruded slot running along an entire length of the extruded aluminum panel member, wherein at least one of the extruded aluminum panel members includes an upper panel and a lower panel, and wherein the upper panel and the lower panel are connected to each other by a plurality of webbing members, and wherein the extruded slot is positioned at a point where one of the plurality of webbing members meets the upper panel.

8. The extruded aluminum panel member of claim 7, wherein the extruded slot includes a T-shape configuration.

9. The extruded aluminum panel member of claim 7, wherein the extruded slot is configured to provide a consistent catch type structure for connecting a hook or other similar structure to the extruded slot at any point along the length of the extruded slot.

10. The extruded aluminum panel member of claim 7, wherein the extruded slot is configured to allow objects to be flexibly fastened to the extruded aluminum panel member.

11. The extruded aluminum panel member of claim 7, wherein the extruded slot comprises a configuration that matches a grappling structure of a tie down line or retaining member.

12. The extruded aluminum panel member of claim 7, wherein the extruded aluminum panel member is able to accommodate modular mounted surface structures attached to at least one point along the extruded slot.

13. A system of cargo transportation, wherein the system utilizes at least one panel structure comprised of a plurality of extruded aluminum panel members, wherein the extruded aluminum panel members are joined together into a single structure by a friction stir welding process, wherein at least one of the extruded aluminum panel members includes an extruded slot running along an entire length of the extruded aluminum panel member, wherein at least one of the extruded aluminum panel members includes an upper panel and a lower panel, and wherein the upper panel and the lower panel are connected to each other by a plurality of webbing members, and wherein the extruded slot is positioned directly adjacent where two of the plurality of webbing members meet the upper panel.

14. The system of claim 13, wherein the extruded T-slot comprises a configuration that matches a grappling structure of a cargo retaining member.

15. The system of claim 13, wherein the extruded slot is positioned in the upper panel directly above where two of the plurality of webbing members meet the upper panel.

16. The panel structure of claim 1, wherein the plurality of webbing members form a substantially triangular shape when viewed from a side of the panel structure at one end of the extruded slot, and wherein the extruded slot is positioned at the point where two of the plurality of webbing members come together at the upper panel to form a corner of the substantially triangular shape.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a prior art panel structure having a balsa wood core and tie-down rings on the perimeter.

(2) FIG. 2 is a perspective view of another prior art panel structure that is fastened together using a bolt and rivet assembly.

(3) FIG. 3 is a perspective view of another prior art panel structure that is being fastened together using the friction stir welding technique.

(4) FIG. 4 is a vertical elevation view of exemplary abutment joints between adjacent panel members of an extruded panel structure.

(5) FIG. 5 is a vertical elevation view of an FSW pin being applied to the surface of an upper plate of an abutment joint in a panel with an anvil beneath the upper surface.

(6) FIG. 6 is a perspective view of an exemplary extruded aluminum bar including a plurality of T-slots.

(7) FIG. 7 is a modified photograph illustrating an exemplary extruded panel member that includes a T-slot.

(8) FIG. 8 is a vertical elevation view of an exemplary extruded panel member that includes a T-slot, the panel member being friction stir welded to the other extruded panel members.

DETAILED DESCRIPTION

(9) Exemplary embodiments of this disclosure are described below and illustrated in the accompanying figures, in which like numerals refer to like parts throughout several views. The embodiments described provide examples, and should not be interpreted as limiting the scope of the invention. Other embodiments or modifications and improvements of the described embodiments are within the scope of the present invention. Although the panel structure may be alternatively referred to throughout this disclosure as a cargo pallet, one of ordinary skill in the art would understand that the panel structure disclosed herein may also be used as flooring, decking, wall supports, etc. Thus, references to specific structures (such as cargo pallets) are not intended to limit the many possible applications of the disclosed panel structure.

(10) FIG. 3 illustrates a cargo pallet 30 that is in the process of assembly using the friction stir welding technique discussed above. The cargo pallet 30 includes several extruded aluminum panel members that are being welded together via friction stir welding by means of an FSW tool 50 to form a unified structure (the cargo pallet 30). A friction stir weld line 32 is apparent on the surface of the cargo pallet 30. The dimensions and shape of the extruded panel members may vary depending on the application and environment in which the pallet is being used. The same FSW technique could be used to form a panel for use in other structures such as bridge decking, for example.

(11) FIG. 4 shows an example of two extruded aluminum panel members 42 and 44 that are in abutment with one another prior to being friction stir welded together to form a cargo pallet 40. In the example of FIG. 4, two blunt flanges 46 and 48 abut one another. However, adjacent panel members may also be connected by interlocking flanges or other mating arrangements suitable for maintaining the relative location of the panel members 42 and 44. The blunt vertical surface of each respective upper and lower flange 46 and 48 is positioned to be in contact with the blunt vertical surface of the other upper and lower flange 46 and 48 prior to using an FSW process to secure the panel members 42 and 44 together.

(12) FIG. 5 is an elevation view of the application of an FSW pin 50 to the upper panels of two panel members. As used herein, the blunt vertical surfaces 52 of each upper and lower flange 46, 48 may also be referred to as faying surfaces 52, or collectively, an abutment joint 52. The panel members may be connected using an FSW tool 50 that is applied to weld together the adjacent surfaces 52 of the upper and lower flanges 46, 48. Once welding is complete, and the panel members are permanently connected, the joined region may be referred to as a weld line 32 (as seen in FIG. 3). An FSW tool 50 comprises a pin 54 which imparts vertical and rotational frictional pressure on the faying surface 52 of the upper flange 46 of each panel member 42, 44. In one embodiment, an anvil 56 may be used as support for the faying surface 52 during the friction stir welding process.

(13) FIG. 6 shows an example of one type of T-slot 61 that can be extruded as part of an aluminum panel member. However, the T-slot can take other forms and shapes, and the design of the T-slot in the present application is not limited to any of the examples described herein.

(14) FIG. 7 shows an example of a cargo pallet 60 that is comprised of several extruded aluminum panel members that have been friction stir welded to form a unitized structure or panel. Although, referred to as a pallet, the panel 60 may be configured for use as another structural element such as bridge decking or container walls, for example. As can be seen in FIG. 7, at least one of the panel members is extruded with a T-slot 62. Extruding the T-slot 62 as part of the panel member eliminates the need for fasteners such as used on the 463L pallet, since the T-slot 62 is an integrated part of the fundamental structure of the pallet 60 itself. In alternative embodiments, several rows of T-slots may be integrated into the pallet, thereby providing for broad flexibility to add modular surface mounted structures as well as anchoring cargo retaining straps or other similar restraint mechanisms. Although referred to as a T slot, the shape and configuration of the T-slot may be modified or adapted as necessary to match the configuration of a grappling structure used by a tie down line or other cargo restraining member.

(15) FIG. 8 shows an example of a cargo pallet 70 that is comprised of several extruded aluminum panel members that have been welded together to form a unitized structure. As can be seen in both FIGS. 7 and 8, at least one of the panel members is extruded with a T-slot 62. In FIG. 8, each of the panel members is aligned together using abutment joints and may preferably be welded together using, for example, an FSW process. As shown in FIG. 8, a first panel member 72 and a second panel member 74 are positioned adjacent to each other. Each panel member 72, 74 includes an upper plate 76 and a lower plate 78. Although FIG. 8 shows the T-slot 62 as being extruded only as part of the first panel member 72, one of ordinary skill in the art will understand that the T-slot may also be extruded as part of any other panel members. Thus, when the panel members are welded together, the unitized panel structure may include one or more T-slots 62, depending on attachment needs. The position of the T-slot 62 may vary as shown in FIGS. 7 and 8. For example, the T-slot 62 may be positioned above the angled webbing members (or vertical webbing members) which provide additional structural support to the area of the pallet surrounding the T-slot. Alternatively, the T-slot 62 may be positioned between webbing members (as shown in FIG. 7) in order to simplify the geometry of the extruded structure.

(16) By extruding the T-slots 62 as part of one or more panel members, the panel structure disclosed herein allows for direct attachment of cargo using a variety of attachment locations. The panel structure may be configured to accommodate modular mounted surface structures so that the pallet can be a base platform or floor for mounting seats, portable rooms and service modules such as galleys, lavatories, crew berths, etc.

(17) Preferably, the extruded slot structure is located below the exterior surface of an extruded panel member. For example, as shown in FIGS. 7 and 8, the T-slot is located below the surface of the panel. As a result, cargo or other devices being retained may be moved easily across the surface without encountering any interference by the anchoring structure provided by the slot. Thus, the innovative arrangement disclosed herein provides for an improved configuration over existing pallet designs which require any anchoring mechanism to be bolted or otherwise fastened to an surface of the panel.

(18) The friction stir welded panel structure with one or more T-slots provides several advantages and benefits that are not available with conventional panel structures. For example, existing pallet designs that incorporate externally mounted anchoring mechanisms with T-slots are often low volume production items that are built on custom or purpose built platforms. In these pallet designs, unlike the embodiments disclosed herein, the T-slot mechanism is not integrated into a panel member. The anchoring structure that includes the T-slot is fastened or riveted or otherwise connected to the panel. The integrated slot included in the panel structure disclosed in the present application is structurally more efficient. First, the design (e.g., shape and dimensions) of the extruded aluminum panel members may be tailored to a specific application and environment while, at the same time, including T-slots that are integrated in into the panel structure. Second, friction stir welding the panel members together to form the unitized structure (without any externally mounted anchoring mechanism) is more cost efficient, light weight and less complicated than a heavy, complicated panel that includes anchoring mechanism that are connected to the panel using fasteners.

(19) Although the above disclosure has been presented in the context of exemplary embodiments, it is to be understood that modifications and variations may be utilized with departing from the spirit and scope of the invention, as those skilled in the art will readily appreciate. Such modifications and variations are considered to be within the purview and scope of the appended claims and their equivalents. For example, the description of the slot in the pallet as a T shape is exemplary only. The shape of the slot may be modified as necessary to match the grappling structure of a tie down line or similar cargo retaining member. The slot structure is configured to provide a consistent catch type structure for connecting to a hook or other similar structure at any point along the length of the slot.

(20) It is also important to note that the construction and arrangement of the elements of the structure as shown and described in the exemplary embodiments is illustrative only. Although only a certain number of embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements shown as multiple parts may be integrally formed, the operation of the assemblies may be reversed or otherwise varied, the length or width of the structures and/or members or connectors or other elements of the system may be varied, the nature or number of adjustment or attachment positions provided between the elements may be varied. It should be noted that the elements and/or assemblies of the system may be constructed from any of a wide variety of materials that provide sufficient strength or durability. Accordingly, all such modifications are intended to be included within the scope of the present disclosure. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the spirit of the present subject matter.

(21) An exemplary embodiment of the innovative panel structure can be described as follows. A panel structure composed of extruded aluminum, the panel structure including: a first extruded member having an upper panel and a lower panel, the upper panel and the lower panel being connected by webbing; a second extruded member having an upper panel and a lower panel, the upper panel and the lower panel being connected by webbing, wherein the first extruded member and the second extruded member are joined by friction stir welding to form a unitized structure; and at least the first extruded member comprises an extruded T-slot along an entire length of the first extruded member, wherein the T-slot is configured to allow cargo to be flexibly fastened to the unitized structure.