Patent Application
20060025034
The present application contains the disclosure of a provisional application entitled “Flexible Structural Connector” filed on or about May 28, 2004.
No federal funds were used in the development of this invention
The present invention relates to flexible structural connectors to enable the creation of truss-type structures, but more particularly, but not exclusively, to the creation of toy structures. Although the first preferred embodiment uses foam as the material from which the connector to join other foam components such as “noodles” used in swimming pools, a rubber version, for example, would enable the connector to be used with hard “real” structural elements such as plastic pipe to enable the rapid construction of structures such as might be used for emergency construction.
There are a great many toy construction sets on the market and a great many toys which are based on the theme of construction sets. Most construction sets have been made out of dense and hard materials, and do not enable flexile free-form connections. Even the prior foam connectors sold for toy “noodles”, or the connectors of the type described in our earlier U.S. Pat. No. 6,641,453, while extremely useful, are, however, limited to intersections at fixed rigid angles, relying on the flexibility of the noodles to achieve non-standard angles. This can limit the toy-play experience by the users.
U.S. Pat. No. 5,498,190 describes a toy for making sculptures where foam blocks with holes can be used as connectors for other foam structures with wire cores; however, it is not suited for use as a structural connection system that join many structural elements at a node to form a truss-type structure.
There are, moreover, a vast plethora of node constructions that have been designed for building construction systems, such as for modular trusses; but, they also appear to focus on fixed and/or rigid angle designs.
The technique and designs of this invention, on the other hand, readily and simply overcome these limitations both in the area of toys and in the more general areas of construction structures. They preferably involve the use of plastic foam, rubber or other flexible and resilient material for supporting transversely extending noodles or other construction elements, that may also be flexible as of foam for toys or more structural as of PVC pipe where appropriate. This allows the noodles or other structural elements to be detachably pressed into the connectors, with the connectors themselves being locally very flexible in bending, yet relatively strong in shear. The effect therefore is somewhat akin to lashing poles together with string: many poles can be brought together at a joint, and then all connected with string. In this case, however, instead of the time-consuming process of lashing, the invention uses a flexible (resilient) strip of material itself laced with holes that grip the structural elements pressed through them. The result is a connection method for truss-type structures that can be used as a toy, or on the other hand, where desired, as a building or construction technique for low-cost rapid assembly of structures, such as is required for emergency construction applications.
A principal object of this invention, therefore, is to provide a new and improved method or technique of and structures for attaining above-described novel features while obviating the limitations of prior structures of this type, and through the provision of longitudinally extending flexible connector strips or members, joining pluralities of transverse structural elements at a plurality of nodes formed therealong, wherein the angles at which the respective structural members transversely supported by the connector strips at the corresponding nodes are restrained and accommodated for, by the flexibility of the longitudinal connector strips.
A further object of this invention is to provide such a novel flexible strip connector that can resiliently grip structural elements pressed transversely into successive holes formed as a flexible linkage therein and therealong.
Another object is to provide such a connector strip that can be made of foam and is particularly adapted used with foam swimming pool noodles and the like.
Other and further objects will be explained hereinafter and more particularly delineated in the appended claims.
In summary, however, the invention embraces in a flexible construction set, a longitudinally extending flexible connector strip formed as a linkage of successively connected transverse holes serving as connector nodes for receiving respective structural elements transversely press-fitted into the corresponding holes for node-connection thereat.
In the previously described use of the invention as a toy for use with foam tubes, popularly known as “noodles” and which are commonly used at swimming pools, the longitudinal connector strip is preferably made from flexible foam, similar to that used for the noodles, and is configured as a long member with a pattern of successive transverse holes, each of which is made slightly smaller than the diameter of the typical noodle. The connector strip, as earlier mentioned, can also be made from flexible plastic or rubber, but foam ensures that it will float and that it is also soft so that if swung or thrown, it will not cause injury. The holes are sized so that each noodle element pressed into a connector hole can serve as a structural node. Since the connector strip is made from foam, or other flexible material, moreover, it can be bent and twisted, thereby enabling it to assume complex-shapes such that many noodles can be inserted and used in conjunction with other connector links to build complex structures. Because the connector and the noodles are flexible, moreover, together they have immense play value because users are not limited by fixed angles and rigid members, and indeed, because the elements are flexible, users may learn how to achieve proper diagonal bracing in order to provide stability to the structures. When made from a resilient material such as rubber, the connector can accommodate hard structural members, such as plastic pipe, as before mentioned, to rapidly create emergency structures.
Best mode and preferred designs and techniques will now be described.
The present invention can best be understood in conjunction with the accompanying drawing, in which:
In the drawings, preferred embodiments of the invention are illustrated by way of example, it being expressly understood that the description and drawings are only for the purpose of illustration and preferred designs, and are not intended as a definition of the limits of the invention.
Ideally the connector strips are extruded and cut to thickness using a traveling shear or waterjet or other soft-material cutting device; however the array of holes may merely be cut from a long rectangular member, but this would use more material and decrease out-of-plane flexibility. They can also be cut, e.g., using a high pressure waterjet, from a rectangular plank of material, particularly for prototyping purposes. They could also be injection molded. If made of rubber sheet, they can be die-cut.
The holes need not just be of round or circular shape.
The linear arrays of holes can also contain more or less than the illustrated nine holes. In addition, the thickness of the foam-material connector strips is shown here to be preferably on the order of the hole diameter, or cross-dimension, say on the order of 1-3 inches more or less, which would be ideal if the connector were to be made of foam. However, if made of rubber, then the thickness could be much smaller, on the order of 5 mm thin (3-10 mm depending on the size of the hole). In addition, the inside surface of the hole could have features, such as protrusions, to give extra flexibility for accommodating different-sized transverse cylinders or non-round shapes, and to help better grip the inserted members.
All such variants are considered within the scope of the invention of using the flexible connection strips of the invention that can be deformed in three dimensions.
In a third preferred embodiment, more than just a linear or planar array of holes linked together by structure can be created. Two rows, a T, or a + shaped array may also be used. When molded, the holes axes can even be at angles to one another, including out-of-plane. In addition, the connector may have fewer or more holes as desired. In all these embodiments, however, the goal is to allow the user to easily create a structure by providing flexible members that elastically slide over structural members to hold them tight, and allow their ends to transmit forces between each other.
Further modifications of the invention will also occur to persons skilled in the art, and all such are deemed to fall within the spirit and scope of the invention as defined by the appended claims.
