INTERNAL SUPPORTS FOR INFLATABLE PRODUCTS
A tensioning structure for use in inflatable products is provided. The inflatable structure may include a first plastic sheet, a second plastic sheet spaced apart from the first plastic sheet, and an inflatable air chamber defined by the first plastic sheet and the second plastic sheet. A plurality of tensioning structures may be disposed within the air chamber. Each tensioning structure may include a panel made of a single sheet of porous material, a first weld sheet affixed to a first end of the panel and affixed to the first plastic sheet, and a second weld sheet affixed to a second end of the panel opposite the first weld sheet and affixed to the second plastic sheet.
This application claims priority of U.S. application Ser. No. 62/002,727, filed on May 23, 2014, titled INTERNAL SUPPORTS FOR INFLATABLE STRUCTURES, which application is incorporated in its entirety by reference in this application.
BACKGROUND INFORMATION1. Field of Invention
The present disclosure relates to inflatable products and, in particular, to an inflatable product incorporating a durable tensioning structure that is light in weight and low in cost.
2. Background
Inflatable products such as inflatable toy structures, inflatable beds, inflatable sofas, inflatable pools and the like are well known in the art. Such products are typically light in weight, easy to pack and store, and easy to carry.
Most inflatable products utilize internal structures in order to form the product into its intended, predetermined shape upon inflation. For example, air beds may incorporate one or more coil-beams or I-beams within the inflatable cavity of the bed. These beams are generally disposed at various locations within the inflatable cavity to shape the bed as the inflatable cavity is pressurized. The beams prevent the air bed from expanding evenly on all sides, similar to that of a balloon. More particularly, in order to maintain the generally rectangular shape of the air bed, these beams may join, for example, upper and lower surfaces of the air bed to one another to restrict their separation during inflation.
The number and spacing of the beams is proportional to the sharpness of the rectangularity of the inflated product. In other words, the greater the number and/or linear extent of the beams within the inflatable cavity, the “flatter” the bed surfaces become.
In conventional inflatable products, such as the air beds described above, the beam structures are typically made of plastic or PVC sheets with a sufficient thickness to ensure that external loads are spread and concomitant tensile stresses are reduced in the product material. As such, conventional inflatable structures utilizing plastic beam structures may meet their desired load requirements by varying the thickness of the beams. This contributes to increased weight of the inflatable product. Similarly, an increase in the thickness and/or spatial density of the beams also increases the compressed/folded volume of the deflated inflatable structure.
Beam structures made of a solid PVC sheet generally are not strong enough to withstand high pressure loads generated during inflation. Such structures are easily deformed once stretched beyond their elastic limit. This contorts the shape and weakens the strength of the inflatable structure. Further, such beam structures may also rip or tear along seams coupling the beam structures to, for example, the upper and lower surfaces of the inflatable structure if the inflatable structure is over-inflated.
Accordingly, a need therefore exists for a tensioning structure suited for inflatable products that is durable, yet lightweight and easy to manufacture.
SUMMARYA tensioning structure for use in an inflatable product is provided. In one example, the inflatable product includes a first sheet, a second sheet disposed opposite the first sheet, where the first sheet and second sheet are spaced apart to define a gap therebetween, and where at least one tensioning structure spans the gap between the first sheet and the second sheet. The tensioning structure may include a panel made of a single sheet of porous material, where the panel includes a first end and an opposing second end. The tensioning structure may further include a first coupling affixed to the first end of the panel, where the first coupling is also coupled to the first sheet, and a second coupling affixed to the second end of the panel, where the second coupling is also coupled to the second sheet.
The panel may be made of material having an open cell mesh construction. In one implementation, the open cell mesh construction comprises an array of evenly spaced, hexagon-shaped apertures. In another implementation, the open cell mesh construction comprises an array of evenly spaced, circular-shaped apertures.
The first weld sheet and the second weld sheet may each include a first strip of material affixed to a front surface of the panel and a second strip of material affixed to a back surface of the panel. In other implementations, the first weld sheet and the second weld sheet may each include a single strip of material folded about the ends of the panel such that one end of the strip of material is affixed to a front surface of the panel and the opposite end of the strip of material is affixed to a back surface of the panel. In yet another implementation, the first end of the panel and the second end of the panel may be coated with PVC or other durable material having favorable bonding characteristics to form coating layers that are coupled to the first sheet and the second sheet.
In a second example, the inflatable product may include a first plastic sheet, a second plastic sheet spaced apart from the first plastic sheet, an inflatable air chamber defined by the first plastic sheet and the second plastic sheet, and a plurality of tensioning structures disposed within the air chamber, where each tensioning structure is coupled between the first wall and the second wall. Each of the plurality of tensioning structures may include a panel made of a single sheet of porous material, a first weld sheet affixed to a first end of the panel and affixed to the first plastic sheet, and a second weld sheet affixed to a second end of the panel opposite the first weld sheet and affixed to the second plastic sheet.
In a third example, the inflatable product may include a first wall, a second wall spaced apart from the first wall, an inflatable air chamber defined by the first wall and second wall, and a plurality of tensioning structures disposed within the air chamber, where each tensioning structure is coupled between the first wall and the second wall. Each of the plurality of tensioning structures may include a panels made of single sheet of porous material, a first weld sheet affixed to a first end of the panel and affixed to the first sheet, and a second weld sheet affixed to a second end of the panel opposite the first weld sheet and affixed to the second sheet.
A method for producing an inflatable product is further provided. The method includes the steps of providing a first sheet made of weldable material, and providing a second sheet made of weldable material, where the first sheet is spaced apart from the first sheet to define a gap therebetween. The method further includes the step of providing at least one tensioning structure spanning the gap between the first sheet and the second sheet, where the at least one tensioning structure includes a tensile sheet made of porous material. The tensile sheet includes a first end and an opposing second end. A first weld strip is applied along the first end of the tensile sheet and a second weld strip is applied along the second end of the tensile sheet, where the first weld sheet is coupled to the first sheet and the second weld sheet is coupled to the second sheet.
In one implementation, the inflatable product is an air mattress having an upper sheet, a lower sheet, and a side wall. In the implementation, the method further comprises the steps of creating an inflatable chamber defined by the upper sheet, the lower sheet, and the side wall by coupling the side wall to the upper sheet and coupling the side wall to the lower sheet; and providing a valve in communication with the inflatable chamber to facilitate inflation and deflation of the air mattress.
In another implementation, the inflatable product is an inflatable spa having an inner wall, an outer wall, a top wall, and a bottom wall. In this implementation, the method further includes the steps of creating an inflatable chamber defined by the inner wall, the outer wall, the top wall, and the bottom wall by coupling the inner wall, the top wall, and the bottom wall, and coupling the outer wall to the top wall and the bottom wall; and providing a valve in communication with the inflatable chamber to facilitate inflation and deflation of the inflatable spa.
Other devices, apparatus, systems, methods, features and advantages of the disclosure will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, and be protected by the accompanying claims.
The present disclosure may be better understood by referring to the following figures. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the disclosure. In the figures, like reference numerals designate corresponding parts throughout the different views.
An exemplary tensioning structure in accordance with the present disclosure utilizes thin, flexible I-beam structures that join two areas of fabric to one another. The I-beam structures comprise open cell or mesh material and are firmly connected at their ends to adjacent fabric by an intermediate material, such as a strip of plastic. The intermediate material is in turn firmly attached to the fabric. The area of contact between the intermediate material and the I-beam structure may be adjusted to impart a connection strength commensurate with the tensile strength of the I-beam structure. Similarly, the area of contact between the intermediate material and the adjacent fabric may also be manipulated to impart a fabric/tensioning structure connection strength commensurate with the aggregate tensile strength of all of the I-beams comprising the inflatable object.
Various tensioning structures are described in detail below. It is contemplated that any of the tensioning structures described herein may be used in any inflatable product, either alone, as a group, or in combination with one another as required or desired for a particular design. In addition, it is contemplated that tensioning structures in accordance with the present disclosure can be used in other contexts, such as in camping, recreational, entertainment, amusement, extreme sports, fall-arrest safety and fire rescue equipment, or in any other context where a lightweight, inflatable structure is needed.
In one exemplary application shown in
The top sheet 106, bottom sheet 108, and sidewall 110 may be constructed of plastic, polyvinyl chloride (PVC), thermoplastic rubber (TPR), polyethylene vinyl acetate (PEVA), ethylene vinyl acetate (EVA), thermoplastic polyurethane elastomer (TPU), neoprene-coated fabric, or any other suitable material. In some implementations, the top sheet 106 may be overlaid with a layer of fabric, padding, flocking, or other material to provide a sleeping surface for the user. One or more air valves (not shown) may be provided and coupled, for example, to the sidewall 110 for inflating and deflating the inflatable chamber 112.
Although air mattress 104 is shown as a single layer, the present disclosure may also apply to mattresses having multiple layers (e.g., double layers). In addition to mattresses, tensioning structures of the present disclosure may be used in other inflatable products such as inflatable boats, inflatable islands, floatation devices, swimming pools, inflatable slides, and any other inflatable devices.
As illustrated in
The fibers 304 may be bundled or arranged in a staggered grid pattern to form a lattice of evenly spaced, circular-shaped apertures 306. The apertures 306 may be spaced apart and arranged at regular intervals to provide the panel 202 (
Referring now to
The mesh array 402 may include a first set of spaced-apart and parallel fiber members 408, a second set of spaced-apart and parallel fiber members 410, and a third set of spaced-apart and parallel fiber members 412. The first, second and third set of fiber members 408, 410, and 412 intersect each other in transverse relation such that, together, they form a plurality of hexagon-shaped apertures 406.
The fibers 404 may be bundled or arranged in a staggered grid pattern to form a lattice of, evenly spaced, hexagon-shaped apertures 406. The fiber members 408, 410, and 412 may be spaced apart at regular intervals to provide the panel 202 (
In some implementations, as shown in
In another example, as shown in
In some implementations, the frame members 420 may comprise a cloth or cast screen or mesh of fabric such as nylon, polyester or other durable material. In other implementations, frame members 420 may be constructed by knotting or weaving together strands of materials such as twine, wire, string, or threads.
Turning back to
The use of two mutually opposed weld strips 204 and 206 employs a gripping action to “sandwich” the panel 202 therebetween, thereby contributing to a high-strength coupling interface. The weld strips 204 and 206 may be affixed to the panel 202 using suitable coupling techniques, such as radio-frequency (RF) welding, hot-air coupling (e.g., melting or welding), adhering (e.g., gluing) or other means known in the art. When implemented in an inflatable product, the resulting dual-layer tensioning structure 100 has improved strength and can be welded to the top sheet 106 and bottom sheet 108, on either side (see e.g.,
In other implementations, as shown in
Ends of each I-beam structure 804 may be glued, welded, or otherwise adhered to the inner wall 812 and the outer wall 814 of the annular wall 808, respectively. The I-beam structures 804 may be coupled to the inner wall 812 and the outer wall 814 by an intermediate material, such as the weld strips (i.e., 204, 206, 502, and 716) described above, or other suitable means. The I-beam structures 804 may extend radially between the inner wall 812 and the outer wall 814 at spaced intervals of, for example, 15° to form a series of I-beam supports around the circumference of the interior annular cavity 816.
The open cell mesh construction of the I-beam structures 804 permits air admitted through the air valve to communicate with all points around the circumference of the annular cavity 816. In some implementations, the I-beam structures 804 may not extend to the top and/or bottom edges 818 and 820 of the annular wall 808 to provide an additional means for air admitted through the air valve to communicate with all points around the circumference of the annular cavity 816. The I-beam structures 804 provide increased support and strength to the inflated pool 800 so that water of substantial depths can be supported within the pool 800 before the sidewall 812 and 814 deform.
The open cell mesh construction of the tensioning structures of the present disclosure provide a weight savings over tensioning structures presently used in inflatable products that comprise solid pieces of material. The construction of the fibers comprising the mesh structure enables tension stresses to be distributed more effectively throughout the tensioning structure. Tensioning structures of the present disclosure are capable of withstanding high tension forces and are adapted to maintain the desired shape and structural integrity of the inflatable product even after surfaces of the inflatable product have been stretched beyond their elastic limit. Tensioning structures of the present disclosure are simple in structure, easy to manufacture, durable, and low in production cost. Tensioning structures of the present disclosure are, further, capable of withstanding high inflation pressure values; thus providing the support surface(s) of the product with an appropriate hardness to provide support and comfort to the user.
In general, terms such as “coupled to,” and “configured for coupling to,” and “secured to,” and “configured for securing to” and “in communication with” (for example, a first component is “coupled to” or “is configured for coupling to” or is “configured for securing to” or is “in communication with” a second component) are used herein to indicate a structural, functional, mechanical, electrical, signal, optical, magnetic, electromagnetic, ionic or fluidic relationship between two or more components or elements. As such, the fact that one component is said to be in communication with a second component is not intended to exclude the possibility that additional components may be present between, and/or operatively associated or engaged with, the first and second components.
The present disclosure may be used in any application where a lightweight, packable structure is needed to join two pieces of material that are urged away from one another in use. Although the previous description illustrates particular examples of various implementations, the present disclosure is not limited to the foregoing illustrative examples. A person skilled in the art is aware that the disclosure as defined by the appended claims and their equivalents can be applied in various further implementations and modifications. In particular, a combination of the various features of the described implementations is possible, as far as these features are not in contradiction with each other. Accordingly, the foregoing description of implementations has been presented for purposes of illustration and description. Modifications and variations are possible in light of the above description.
Claims
1. An inflatable product comprising:
- a first sheet;
- a second sheet disposed opposite the first sheet, the first sheet and the second sheet being spaced apart to define a gap therebetween; and
- at least one tensioning structure spanning the gap between the first sheet and the second sheet, the tensioning structure comprising: a panel made of a single sheet of porous material, the panel having a first end and an opposing second end; a first coupling affixed to the first end of the panel, the first coupling being coupled to the first sheet; and a second coupling affixed to the second end of the panel, the second coupling being coupled to the second sheet.
2. The inflatable product of claim 1, wherein the panel is made of material having an open cell mesh construction.
3. The inflatable product of claim 2, wherein the open cell mesh construction comprises an array of evenly spaced, hexagon-shaped apertures.
4. The inflatable product of claim 2, wherein the open cell mesh construction comprises an array of evenly spaced, circular-shaped apertures.
5. The inflatable product of claim 1, wherein the first coupling and the second coupling each comprise a first strip of material affixed to a front surface of the panel and a second strip of material affixed to a back surface of the panel.
6. The inflatable product of claim 1, wherein the first coupling and the second coupling each comprise a single strip of material folded about the ends of the panel such that one end of the strip of material is affixed to a front surface of the panel and the opposite end of the strip of material is affixed to a back surface of the panel.
7. The inflatable product of claim 1, wherein the first end of the panel and the second end of the panel are coated with PVC or other durable material having favorable bonding characteristics to form coating layers, wherein the coating layers are coupled to the first sheet and the second sheet.
8. The inflatable product of claim 1, wherein the at least one tensioning structure is arranged in an annular fashion to form a closed columnar structure.
9. An inflatable product comprising:
- a first plastic sheet;
- a second plastic sheet spaced apart from the first plastic sheet;
- an inflatable air chamber defined by the first plastic sheet and the second plastic sheet; and
- a plurality of tensioning structures disposed within the air chamber, where each tensioning structure is coupled between the first plastic sheet and the second plastic sheet, the plurality of tensioning structures comprising: a panel made of a single sheet of porous material, the panel having a first end and an opposing second end; a first weld sheet affixed to the first end of the panel, the first weld sheet being coupled to the first plastic sheet; and a second weld sheet affixed to the second end of the panel, the second weld sheet being coupled to the second plastic sheet.
10. The inflatable product of claim 9, wherein the panel is made of material having an open cell mesh construction.
11. The inflatable product of claim 10, wherein the open cell mesh construction comprises an array of evenly spaced, hexagon-shaped apertures.
12. The inflatable product of claim 10, wherein the open cell mesh construction comprises an array of evenly spaced, circular-shaped apertures.
13. The inflatable product of claim 9, wherein the first weld sheet and the second weld sheet each comprise a first strip of material affixed to a front surface of the panel and a second strip of material affixed to a back surface of the panel.
14. The inflatable product of claim 9, wherein the first weld sheet and the second weld sheet each comprise a single strip of material folded about the ends of the panel such that one end of the strip of material is affixed to a front surface of the panel and the opposite end of the strip of material is affixed to a back surface of the panel.
15. The inflatable product of claim 9, wherein the first end of the panel and the second end of the panel are coated with PVC or other durable material having favorable bonding characteristics to form coating layers, wherein the coating layers are coupled to the first sheet and the second sheet.
16. The inflatable product of claim 9, wherein the at least one tensioning structure is arranged in an annular fashion to form a closed columnar structure.
17. The inflatable product of claim 9, wherein the plurality of tensioning structures are spaced apart and arranged substantially parallel to one another.
18. An inflatable product comprising:
- a first wall;
- a second wall spaced apart from the first wall;
- an inflatable air chamber defined by the first wall and the second wall; and
- a plurality of tensioning structures disposed within the air chamber, where each tensioning structure is coupled between the first wall and the second wall, the plurality of tensioning structures comprising: a panel made of single sheet of porous material, the panel having a first end and an opposing second end; a first weld sheet affixed to the first end of the panel and coupled to the first sheet; and a second weld sheet affixed to the second end of the panel and coupled to the second sheet.
19. The inflatable product of claim 18, wherein the panel is made of material having an open cell mesh construction.
20. The inflatable product of claim 18, wherein the open cell mesh construction comprises an array of evenly spaced, hexagon-shaped apertures.
21. The inflatable product of claim 19, wherein the open cell mesh construction comprises an array of evenly spaced, circular-shaped apertures.
22. The inflatable product of claim 18, wherein the first weld sheet and the second weld sheet each comprise a first strip of material affixed to a front surface of the panel and a second strip of material affixed to a back surface of the panel.
23. The inflatable product of claim 18, wherein the first weld sheet and the second weld sheet each comprise a single strip of material folded about the ends of the panel such that one end of the strip of material is affixed to a front surface of the panel and the opposite end of the strip of material is affixed to a back surface of the panel.
24. The inflatable product of claim 18, wherein the first end of the panel and the second end of the panel are coated with PVC or other durable material having favorable bonding characteristics to form coating layers, wherein the coating layers are coupled to the first wall and the second wall.
25. The inflatable product of claim 18, wherein the at least one tensioning structure is arranged in an annular fashion to form a closed columnar structure.
26. The inflatable product of claim 18, wherein the plurality of tensioning structures are spaced apart and arranged substantially parallel to one another.
27. The inflatable product of claim 18, wherein the plurality of tensioning structures are radially arranged within the inflatable chamber at spaced intervals.
28. The inflatable product of claim 18, wherein the first wall is concentric to the second wall.
29. A method for producing an inflatable product, the method comprising the steps of:
- providing a first sheet made of weldable material;
- providing a second sheet made of weldable material, the first sheet being spaced apart from the first sheet to define a gap therebetween;
- providing at least one tensioning structure spanning the gap between the first sheet and the second sheet, the at least one tensioning structure including a tensile sheet made of porous material, the tensile sheet having a first end and an opposing second end;
- applying a first weld strip along the first end of the tensile sheet;
- applying a second weld strip along the second end of the tensile sheet;
- coupling the first weld sheet to the first sheet; and
- coupling the second weld sheet to the second sheet.
30. The method of claim 29, where the inflatable product is an air mattress having an upper sheet, a lower sheet, and a side wall, the method further comprising the steps of:
- creating an inflatable chamber defined by the upper sheet, the lower sheet, and the side wall by coupling the side wall to the upper sheet, and coupling the side wall to the lower sheet; and
- providing a valve in communication with the inflatable chamber to facilitate inflation and deflation of the air mattress.
31. The method of claim 29, where the inflatable product is an inflatable spa having an inner wall, an outer wall, a top wall, and a bottom wall, the method further comprising the steps of:
- creating an inflatable chamber defined by the inner wall, the outer wall, the top wall, and the bottom wall by coupling the inner wall the top wall and the bottom wall, and coupling the outer wall to the top wall and the bottom wall; and
- providing a valve in communication with the inflatable chamber to facilitate inflation and deflation of the inflatable spa.
32. The method of claim 29, wherein the tensile sheet is made of material having an open cell mesh construction.
33. The method of claim 32, wherein the open cell mesh construction comprises an array of evenly spaced, hexagon-shaped apertures.
34. The method of claim 32, wherein the open cell mesh construction comprises an array of evenly spaced, circular-shaped apertures.
35. The method of claim 29, further comprising the steps of:
- coating the first end and the second end of the tensile sheet with PVC or other durable material having favorable bonding characteristics to form coating layers; and
- coupling the coating layers to the first sheet and the second sheet.
Type: Application
Filed: Dec 10, 2014
Publication Date: Nov 26, 2015
Inventor: Feng Liu (Shanghai)
Application Number: 14/566,075