FIELD OF THE INVENTION
This invention relates generally to bedding and seating products and, more particularly, to pocketed spring assemblies used in bedding and seating products.
BACKGROUND OF THE INVENTION
Mattress spring core construction over the years has been a continuously improving art with advancements in materials and machine technology. A well-known form of spring core construction is known as a Marshall spring construction wherein metal coil springs are encapsulated in individual pockets of fabric and formed as elongate or continuous strings of pocketed coil springs. In an earlier form, these strings of coil springs were manufactured by folding an elongate piece of fabric in half lengthwise to form two plies of fabric and stitching transverse and longitudinal seams to join the plies of fabric to define pockets within which the springs were enveloped.
Improvements in spring core constructions have involved the use of fabrics which are thermally or ultrasonically weldable to themselves. By using such welding techniques, these fabrics have been advantageously used to create strings of individually pocketed coil springs wherein transverse and longitudinal welds, instead of stitching, are used to form the pockets encapsulating the springs.
Once strings of pocketed springs are constructed, they may be assembled to form a pocketed spring core or assembly for a mattress, cushion or the like by a variety of methods. For example, multiple or continuous strings may be arranged in a row pattern corresponding to the desired size and shape of a mattress or the like, and adjacent rows of strings may be interconnected by a variety of methods. The result is a unitary assembly of pocketed coil springs serving as a complete spring core assembly.
Conventional pocketed spring cores incorporating pocketed strings of springs have less motion transfer between sleeping partners when compared to traditional helically-laced open coil spring assemblies. Each pocketed coil spring is able to move with greater independence and, therefore provide less influence on adjacent pocketed coil springs than if the coil springs were not inside individual pockets. However, with a traditional pocketed spring mattress, a sheet of foam or other cushioning layer is attached to an upper surface of the pocketed spring assembly. The foam or cushioning sheet or sheets acts like a bridge, such that a load applied to one side of a mattress may affect the other side of the mattress, providing an undesirable bridging effect. The present invention eliminates the undesirable bridging effect by encapsulating individual cushion members inside outer pockets of strings of springs.
Another type of mattress once popular is known as a waterbed. A waterbed comprises an outer vinyl cover or bladder filled with water. One disadvantage of waterbeds is the volume of water required to fill the bladder. Should the bladder break, the carpet and/or other parts of the room in which the waterbed breaks may be damaged. To some users, a waterbed is desirable due to its unique feel and effect on sore muscles.
It would be desirable to incorporate the feel of a waterbed into a conventional mattress. Therefore, there is a need to combine multiple technologies to improve the feel and motion transfer in a bedding or seating product having a pocketed spring core.
SUMMARY OF THE INVENTION
In one aspect, a bedding or seating product is provided. The product comprises a pocketed spring assembly comprising a plurality of parallel strings of springs, each string joined to at least one adjacent string. Each string comprises a piece of fabric surrounding a plurality of inner pocketed springs and a plurality of liquid pods, first and second opposed plies of fabric being on opposite sides of the inner pocketed springs and liquid pods. Outer pockets are formed along the length of the string by a longitudinal seam and transverse seams joining the first and second plies. At least one inner pocketed spring and at least one liquid pod are in each of the outer pockets.
Each liquid pod may comprise an outer, protective pouch, a filler and a plurality of beads inside the outer, protective pouch. The pouch may be made of any flexible but strong, non-permeable hydrophobic membrane. The pouch may be made from a variety of polymeric materials including, but not limited to, natural or synthetic rubber or deblock or triblock copolymer resins, potentially melted or mixed with a plasticizing agent, such as mineral oil, synthetic oil, etc. Triblock copolymers include, but are not necessarily limited to, (SB)n styrene-butadiene, (SEB)n, (SIS) styrene-isoprene-styrene block copolymers, (SEBS) styrene-ethylene-butylene-styrene block copolymers, (SEP) styrene-ethylene-propylene block copolymers, (SEEPS) styrene-ethylene-ethylene-propylene-styrene block copolymers, (SBS) styrene-butadiene-styrene block copolymers and the like. Alternatively, the pouch may be made of polyurethane elastomer or silicone. The pouches may contain additives such as colors or antimicrobial additives. The pouches of the liquid pods may be made at least partially of renewable or recycled material.
The filler may be a solid, a liquid or a hydrogel at room temperature. In the event the beads are filled with liquid, the liquid may be water, glycerol or other gylcols or synthetic or natural oils. The liquid may contain additives such as colors or antimicrobial additives. The liquid may contain at least some water. The water may be mixed with a modifier such as a known component to lower the freezing point of water.
Alternatively, the filler may be a solid such as a wax or phase change material (“PCM”) which is solid at room temperature but which turns to liquid when heated, such as when a person lays on a product containing such phase change materials. The phase change material absorbs the heat from the person, thereby changing the solid to a liquid. Phase change materials are considered latent heat storage units and can be defined as a substance with a high heat of fusion which can store and release large amounts of energy as it undergoes a phase transition, namely between the solid and liquid phases.
PCMs can be divided into the following, non-limiting classifications: Organic PCMs, which including but not limited to paraffins of the form CnH2n+2, and fatty acids of the form CH3(CH2)2nCOOH; inorganic PCMs, including, but not limited to, salt hydrates of the form MnH2O; eutectics, comprising organic-organic, organic-inorganic, and inorganic-inorganic compounds; and hygroscopic materials.
Examples of organic PCMs include, but are not limited to, water, NaCl.Na2SO4.10H2O, sodium sulfate (Na2SO4.10H2O), Na2SiO3.5H2O, lithium, NaNO2 NaCl (5.0%)/NaNO3, NaOH/Na2CO3 (7.2%), NaCl/NaNO3 (5.0%), NaCl (5.7%)/NaNO3 (85.5%)/Na2SO4, KNO3 (10%)/NaNO3, NaNO3, NaOH, KNO3/KCl (4.5%), lead, KNOB, KNO3/KBr (4.7%)/KCl (7.3%), NaCl/KCL (32.4%)/LiCl (32.8%), KOH, NaCl (26.8%)/NaOH, zinc, aluminium, silver, gold, copper, iron, titanium, Mn(NO3)2.6H2O+MnCl2.4H2O(4 % w/w), and NaCl (42.5%)/KCl (20.5)/MgCl2.
Examples of non-organic PCMs include, but are not limited to, paraffin 14-carbons, formic acid, paraffin 15-carbons, caprilic acid, paraffin 16-carbons, acetic acid, glycerin, polyethylene glycol 600, paraffin 17-carbons, p-lattic acid, paraffin 18-carbons, methyl palmitate, Trimethylolethane (TME)(63% w/w)+H2O(37% w/w), paraffin 19-carbons, trimyristin, capric acid, paraffin 20-carbons, camphenilone, docasyl bromide, caprylone, paraffin 21-carbons, phenol, heptadecanone, 1-cyclohexylooctadecane, 4-heptadacanone, p-toluidine, paraffin 22-carbons, cyanamide, lauric acid, methyl eicosanoate, elaidic acid, paraffin 23-carbons, 3-heptadecanone, 2-heptadecanone, hydrocinnamic acid, cetyl acid, paraffin 25-carbons, camphene, o-nitroaniline, paraffin 24-carbons, 9-heptadecanone, thymol, methyl behenate, pentadecanoic acid, diphenyl amine, p-dichlorobenzene, oxolate, hypophosphoric acid, o-xylene dichloride, palmitic acid, p-chloroacetic acid, chloroacetic acid, tristearin, paraffin 26-carbons, nitro naphthalene, myristic acid, paraffin 27-carbons, α-naphthylamine, heptadecanoic acid, α-chloroacetic acid, paraffin 28-carbons, bee wax, bees wax, glycolic acid, glycolic acid, paraffin 29-carbons, p-bromophenol, paraffin 30-carbons, azobenzene, paraffin 31-carbons, acrylic acid, stearic acid, paraffin 32-carbons, dinitrotoluene (2,4), paraffin 33-carbons, paraffin 34-carbons, phenylacetic acid, thiosinamine, bromocamphor, benzylamine, durene, methyl bromobenzoate, acetamide, alpha naphthol, glutaric acid, p-xylene dichloride, methyl fumarate, catechol, quinone, acetanilide, succinic anhydride, benzoic acid, stilbene, and benzamide.
The beads may be hydrogel products which constitute a group of natural or synthetic polymeric materials. The hydrophilic structure of the polymeric materials enables them to hold large amounts of water in their three-dimensional network. Natural polymers for hydrogel preparation include hyaluronic acid, chitosan, heparin, alginate and fibrin. Common synthetic polymers include polyvinyl alcohol, polyethylene glycol, sodium polyacrylate, acrylate polymers and copolymers thereof.
An alternative liquid pod may lack the beads but instead may comprise an outer pouch containing a volume of liquid such as water or glycerin or a quantity of solid such as a phase change material. The pouch of such a liquid pod may be made of the same flexible but strong, non-permeable hydrophobic membrane such as the membrane described above with respect to the pouch containing beads.
At least one cushion pad may also be incorporated into each outer pocket of the pocketed spring assembly. Each cushion pad is preferably at least partially made of foam but may be made of fiber or some combination of foam and fiber. In a one-sided pocketed spring assembly, a cushion pad may be located between the liquid pod and the inner pocketed spring inside the outer pocket. Alternatively, the liquid pod may be located between the cushion pad and the inner pocketed spring inside the outer pocket.
In a two-sided pocketed spring assembly, a cushion pad and a liquid pod may be on each side of the inner pocketed spring such that two cushion pads, two liquid pods and one inner pocketed spring are encased by the outer pocket. In some embodiments, at least one cushion pad and at least one liquid pod may be pocketed together and may be any desired size or shape.
Different coil springs may be located inside the inner pockets. In one embodiment, each of the coil springs has upper and lower end turns and a plurality of central convolutions between the end turns, the convolutions decreasing in diameter and pitch from a middle portion of the spring towards at least one of the end turns. In another embodiment, each of the coil springs has upper and lower end turns and a plurality of central convolutions between the end turns, each of the convolutions being the same diameter. Regardless of the configuration of coil spring, each coil spring is preferably made of one piece of wire of a uniform diameter, but not in all cases.
In some embodiments, an upper end of each transverse seam forming adjacent pockets of the string is below an upper surface of the string of springs to partially separate adjacent outer pockets. In other embodiments, such as double-sided pocketed spring assemblies, each end of each transverse seams has a length less than the height of the of the string to partially separate adjacent outer pockets. In the bedding industry, pocketed spring assemblies having such transverse seams are said to have a “split top” feature. Cushioning materials may be placed on the pocketed spring assembly, and a covering, usually an upholstered covering, encases the pocketed spring assembly and cushioning materials.
The strings may extend longitudinally (from end-to-end) or transversely (from side-to-side). A pocketed spring assembly for use in a bedding or seating product may be posturized into regions or zones of different firmness by incorporating different strings into the pocketed spring assembly.
If the strings extend transversely, the pocketed spring assembly may include a plurality of the strings having outer pockets containing at least one liquid pod and other strings lacking liquid pods, the strings arranged in a plurality of zones longitudinally spaced apart. For example, the pocketed spring assembly may include three such zones. The three zones may comprise a central zone, a head end zone and a foot end zone. The end zones may comprise strings lacking liquid pods, and the strings comprising the central zone may comprise strings having liquid pods. Alternatively, the end zones may have certain types of liquid pods, and the strings comprising central zone may comprise strings having different liquid pods.
If the strings extend longitudinally, the pocketed spring assembly may include strings having at least one liquid pod in each outer pocket and other strings lacking liquid pods, the strings arranged in a plurality of zones transversely spaced apart. For example, the pocketed spring assembly may include two such zones, a “warm” zone and a “cool” zone. The “cool” side or zone may comprise strings of springs having at least one liquid pod in each outer pocket, and the “warm” side or zone can comprise strings of springs lacking liquid pods. Alternatively, the different zones may have different types of liquid pods incorporated therein.
In another aspect, a pocketed spring assembly for a bedding or seating product is provided. The pocketed spring assembly comprises a plurality of parallel strings. Each string is joined to at least one adjacent string. Each of the strings comprises a plurality of interconnected outer pockets made from one piece of fabric. Each of the outer pockets contains at least one inner pocketed spring, at least one cushion pad and at least one liquid pod. The piece of fabric is joined to itself along a longitudinal seam and has first and second opposed plies of fabric on opposite sides of the inner pocketed springs. The first and second plies of fabric are joined by transverse seams between adjacent inner pocketed springs.
In some embodiments, each of the transverse seams forming the adjacent outer pockets of the string has one end located below an upper surface of the string to partially separate adjacent outer pockets. In embodiments of double sided pocketed spring assemblies, each of the transverse seams forming the adjacent outer pockets of the string has one end located below an upper surface of the string and the other end located above a lower surface of the string. Such a string is considered to have the “split top” feature on both sides of the string.
In another aspect, a string of springs for a pocketed spring assembly for a bedding or seating product is provided. The pocketed spring assembly comprises a plurality of parallel strings of springs. Each string is joined to an adjacent string. Each of the strings comprises a plurality of interconnected outer pockets made from one piece of fabric. Each of the outer pockets contains at least one inner pocketed spring and at least one liquid pod. The piece of fabric is joined to itself along a longitudinal seam and has first and second opposed plies of fabric on opposite sides of the inner pocketed springs. The fabric of the first and second plies is joined by transverse seams which are shorter than the string. Each of the transverse seams forming the adjacent outer pockets of the string has an upper end located below an upper surface of the string to partially separate adjacent outer pockets and enable some of the liquid pods to flex or move without substantially flexing the liquid pods within other outer pockets of the string.
One advantage of the present invention is that when a bedding or seating product, such as a mattress, is manufactured, the manufacturer need not place one or more sheets of cushioning material over the pocketed spring assembly prior to the unit being upholstered. The mattress manufacturer may simply place a cover around the pocketed spring assembly without using any sheets of cushioning material.
Another advantage of the present invention is that the inner pocketed coil spring does not press into the liquid pod or cushion pad above/below it when subjected to a load. Because the inner pocketed spring is retained in its own inner pocket independent of the cushion pad or pads or liquid pod or pods, the inner pocketed spring does not exert force on the cushion pad or pads or liquid pod or pods, thereby preserving the designed characteristics of the cushion pad or pads or liquid pod or pods such as firmness, for example. The inner pockets of fabric surrounding the coil springs and/or the fabric surrounding each cushion pad or liquid pod preserves the integrity of the cushion pads or liquid pods and increases the life of the pocketed spring assembly. The result is that the user “feels” more of the cushion pad or pads or liquid pod or pods.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the summary of the invention given above, and the detailed description of the drawings given below, explain the principles of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view, partially broken away, of a bedding or seating product incorporating a pocketed spring assembly according to the principles of the present invention.
FIG. 1A is a perspective view, partially broken away, of a bedding or seating product incorporating another pocketed spring assembly.
FIG. 1B is a perspective view, partially broken away, of a double-sided bedding product incorporating another pocketed spring assembly.
FIG. 1C is a perspective view, partially broken away, of another bedding product incorporating the pocketed spring assembly of FIG. 1.
FIG. 2 is a perspective view, partially broken away, of a portion of a string of springs of the pocketed spring assembly of FIG. 1 in an unloaded condition.
FIG. 2A is a perspective view, partially broken away, of a portion of another string of springs in an unloaded condition.
FIG. 2B is a perspective view of a liquid pod in a relaxed condition.
FIG. 2C is a perspective view of a different liquid pod in a relaxed condition.
FIG. 3 is a cross-sectional view, partially broken away, of the portion of the string of FIG. 2 in an unloaded condition.
FIG. 3A is a cross-sectional view, partially broken away, of a portion of an alternative string in an unloaded condition.
FIG. 3B is a cross-sectional view, partially broken away, of the portion of the string of FIG. 3A showing two pocketed springs being in a loaded condition.
FIG. 3C is a cross-sectional view, partially broken away, of a string of springs having a different spring in an unloaded condition.
FIG. 3D is a cross-sectional view, partially broken away, of a string of springs having a different spring in an unloaded condition.
FIG. 4 is a perspective view of a portion of the pocketed spring assembly of FIG. 1 in a relaxed condition.
FIG. 5 is a perspective view of a portion of another pocketed spring assembly in a relaxed condition, the strings of springs being offset from one another.
FIG. 6 is a cross-sectional view, partially broken away, of another string of springs in an unloaded condition.
FIG. 6A is a cross-sectional view, partially broken away, of another string of springs in an unloaded condition.
FIG. 7 is a cross-sectional view, partially broken away, of double-sided string of springs in an unloaded condition.
FIG. 8 is a cross-sectional view, partially broken away, of double-sided string in an unloaded condition.
FIG. 9 is a cross-sectional view, partially broken away, of double-sided string in an unloaded condition.
FIG. 10 is a cross-sectional view, partially broken away, of another double-sided string in an unloaded condition.
FIG. 11 is a cross-sectional view, partially broken away, of a portion of the string of FIG. 10 in an unloaded condition.
FIG. 12 is a cross-sectional view, partially broken away, of another double-sided string in an unloaded condition.
FIG. 13 is a schematic cross-sectional view of a single-sided string in an unloaded condition.
FIG. 14 is a schematic cross-sectional view of another single-sided string in an unloaded condition.
FIG. 14A is a schematic cross-sectional view of another single-sided string in an unloaded condition.
FIG. 15 is a schematic cross-sectional view of another single-sided string in an unloaded condition.
FIG. 15A is a schematic cross-sectional view of another single-sided string in an unloaded condition.
FIG. 16 is a schematic cross-sectional view of a double-sided string in an unloaded condition.
FIG. 17 is a schematic cross-sectional view of another double-sided string in an unloaded condition.
FIG. 17A is a schematic cross-sectional view of another double-sided string in an unloaded condition.
FIG. 18 is a schematic cross-sectional view of another double-sided string in an unloaded condition.
FIG. 18A is a schematic cross-sectional view of another double-sided string in an unloaded condition.
FIG. 19 is a top view of a posturized pocketed spring assembly constructed in accordance with the present invention.
FIG. 20 is a top view of another posturized pocketed spring assembly constructed in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring first to FIG. 1, there is illustrated a bedding product in the form of a single-sided mattress 10 incorporating the principles of the present invention. This product or mattress 10 comprises a pocketed spring assembly 12 over the top of which there lay conventional padding or cushioning layers 14, 16 which may be foam, fiber, gel, a pocketed spring blanket or any other suitable materials or any combination thereof. The pocketed spring assembly 12 includes a central portion 15 and border 17 surrounding the central portion 15. The pocketed coil springs 11 of the border 17 may be of a different diameter than pocketed coil springs 28 of the central portion 15. Although one type of border 17 is illustrated, the border may assume other forms or shapes of any desired size, such as pocketed coil springs of different geometries than the pocketed springs of the central portion. Alternatively, the border 17 may be omitted in any embodiment described or shown herein. The pocketed spring assembly 12 is mounted upon a base 18 and is completely enclosed within an upholstered covering material 20.
As shown in FIG. 1, fully assembled, the product 10 has a length “L” defined as the linear distance between opposed end surfaces 22 (only one being shown in FIG. 1). Similarly, the assembled product 10 has a width “W” defined as the linear distance between opposed side surfaces 24 (only one being shown in FIG. 1). In the product shown in FIG. 1, the length is illustrated as being greater than the width. However, it is within the scope of the present invention that the length and width may be identical, as in a square product.
As shown in FIG. 1, the central portion 15 of pocketed spring assembly 12 is manufactured from multiple strings 26 of pocketed springs 28 joined together. Each string of pocketed springs 26 extends longitudinally or from head-to-foot along the full length of the product 10.
Although in the central portion 15 of the pocketed spring assembly 12 the strings of pocketed springs 26 are illustrated as extending longitudinally or from head-to-foot, they may extend transversely or from side-to-side as shown in the pocketed spring assembly 12a of product 10a shown in FIG. 1A. The central portion 15 of pocketed spring assembly 12a comprises multiple strings 26a of pocketed springs, identical to the strings of springs 26, but shorter in length.
FIG. 1B illustrates a double-sided mattress 10b comprising a pocketed spring assembly 12b having a central portion 15 and border 17, as shown in the mattress 10 of FIG. 1. However, the mattress 10b of FIG. 1B has conventional padding layers 14, 16 above and below a double-sided pocketed spring assembly 12b. The central portion 15 of the double-sided pocketed spring assembly 12b comprises a plurality of strings 26b of pocketed springs, one being partially shown in cross-section in FIG. 7.
FIG. 1C illustrates a single-sided mattress 10c comprising a pocketed spring assembly 12 having a central portion 15 and border 17, as shown in the mattress 10 of FIG. 1. However, the mattress 10c of FIG. 1C has a pocketed topper 19 comprising miniature pocketed coil springs in addition to padding layers 14, 16 above the pocketed topper 19. A scrim layer 21 separates the pocketed topper 19 from the pocketed spring assembly 12. Although one configuration of pocketed topper 19 is illustrated, any pocketed topper or comfort layer known in the art may be used.
According to this invention, any of the padding or cushioning layers, including the pocketed topper 19, may be omitted in any of the embodiments shown or described herein. The novel features reside in the pocketed spring assembly, in at least one of the central portion or border of the pocketed spring assembly.
These strings of pocketed springs 26, 26a and 26b, and any other strings of springs described or shown herein, may be connected in side-by-side relationship as, for example, by gluing the sides of the strings together in an assembly machine, to create an assembly or matrix of springs having multiple rows and columns of pocketed springs bound together as by gluing, welding or any other conventional assembly process commonly used to create pocketed spring cores or assemblies.
Referring to FIGS. 4 and 5, the strings 26 of pocketed springs may be joined so that the individually pocketed springs 28 are aligned in transversely extending rows 30 and longitudinally extending columns 32. Alternatively, the strings 26 of pocketed springs may be offset from one another in a pocketed spring assembly. In such an arrangement, shown in FIG. 5, the individually pocketed springs 28 are not aligned in rows and columns; instead the individually pocketed springs 28 fill gaps or voids 70 of the adjacent strings 26. FIG. 5 shows a portion of a pocketed spring assembly 12′ with multiple strings 26 arranged in this manner. Either alignment of strings may be incorporated into any of the pocketed spring assemblies or cores illustrated or described herein. Although FIGS. 4 and 5 illustrate strings 26, the same alignments may be used in any pocketed spring assembly disclosed herein having any strings disclosed herein including strings 26a or 26b.
As best illustrated in FIGS. 2 and 3, each string 26 of pocketed springs 28 comprises a row of interconnected fabric outer pockets 34. Each of the fabric outer pockets 34 contains at least one inner pocketed coil spring 82, at least one cushion pad 54 and at least one liquid pod 55. Each inner pocketed coil spring 82 comprises a coil spring 36 encased in an inner pocket 35 having two side seams 37. The inner pocket 35 may be made of a single piece of fabric or any number of pieces of fabric.
FIGS. 2 and 3 illustrate a one-sided string 26 for use in a single-sided pocketed spring assembly, such as pocketed spring assembly 12. In string 26, one cushion pad 54 rests on the fabric of the inner pocket 35 above the individually pocketed coil spring 36. In this orientation, the coil spring 36 is prevented from contacting and damaging the material of the cushion pad 54.
In string 26, one liquid pod 55 rests on the cushion pad 54 above the cushion pad 54. In the drawings the liquid pod 55 is illustrated having approximately the same height as the cushion pad 54. However, the liquid pod 55 may have a different height than the cushion pad 54.
For ease of understanding, FIG. 2 illustrates the leftmost outer pocket 34 shown in dashed lines and the inner pocket 35 shown in solid lines. In FIG. 2, the other outer pockets 34 of string 26 are shown in solid lines and the inner pockets 35 shown in dashed lines.
As best shown in FIG. 2, the cushion pad 54 is shown as being shaped like a hockey puck or puck-shaped. Cushion pad 54 is illustrated having a circular upper surface 76, a circular lower surface 78 and a sidewall 80.
As best shown in FIGS. 2 and 2B, the liquid pod 55 is shown as comprising an outer pouch 57 surrounding a plurality of beads 59 and filler 63. The filler 63 may comprise a volume of liquid such as water or glycerin or a volume of hydrogel or a quantity of solid material such as a phase change material described above. Although the beads 59 are illustrated all being the same size, they may be different sizes within the liquid pod 55. The outer pouch 57 does not to be filled with beads 59; any desired quantity of beads 59 may be located inside the outer pouch 57 of the liquid pod 55. The drawings are not intended to be limiting. Similarly, the amount of filler 63 may be any desired volume or mass; the drawings are not intended to be limiting.
The outer pouch 57 may be made of any flexible but strong, non-permeable hydrophobic membrane. The outer pouch 57 may be made from a variety of polymeric materials including, but not limited to, natural or synthetic rubber or deblock or triblock copolymer resins, potentially melted or mixed with a plasticizing agent, such as mineral oil, synthetic oil, etc. rubber or any type of plastic such as vinyl, polyurethane, polyurea or silicone. The membrane of the outer pouch 57 may include any known plastic or natural or synthetic rubber including but not limited to silicone, polyurethane and polyurea.
As shown in FIGS. 2C, another embodiment of liquid pod 55′ may be incorporated into any comfort layer shown or described herein. Liquid pod 55′ comprises an outer pouch 57′ surrounding a filler 63′. The liquid pod 55′ contains no beads. The outer pouch 57′ may be made of rubber or any type of plastic such as vinyl, polyurethane, polyurea or silicone. The filler 63′ contained inside the outer pouch 57′ may be water or glycerin. The filler 63′ contained inside the outer pouch 57′ may be a volume of liquid such as water or glycerin or a volume of hydrogel or a quantity of solid material such as a phase change material as described above.
In any of the embodiments shown or described herein, the liquid pods 28, 28′ may be any desired size. Although the beads 59 are illustrated all being the same size, they may be different sizes within a liquid pod 28. The drawings are not intended to be limiting.
FIG. 2A illustrates a string 27 identical to string 26 but having a different cushion pad 54a. Cushion pad 54a has a different shape than cushion pads 54 inside the inner pockets 35 of the string 27. FIG. 2A illustrates a cushion pad 54a having a rectangular upper surface 76a, a rectangular lower surface 78a and four rectangular sidewalls 80a. Although FIG. 2A illustrates square upper and lower surfaces and sidewalls, one or more surfaces or sidewalls may be other rectangular shapes. Although FIGS. 2 and 2A illustrate cushion pads 54, 54a, respectively, and liquid pods 55 of a certain size and shape, the drawings are not intended to limit the size or shape of the cushion pads or liquid pods.
Each cushion pad 54, 54a is illustrated being a single piece of material, such as foam, but may be any number of pieces of any desired material joined together. Alternatively, the cushion pad 54, 54a may be made of fiber, cotton, gel or any combination thereof.
The coil spring 36 is preferably made of one piece of wire of a uniform diameter, but may be made of other materials, multiple strands of twisted wire and/or may be a non-uniform diameter. As best shown in FIG. 2, each coil spring 36 has a central or longitudinal axis A, an upper end turn 38, a lower end turn 40 and a plurality of central convolutions 42 between the end turns. FIGS. 2 and 3A illustrate a barrel-shaped coil spring 36 in which the diameter of the end turns 38, 40 is less than the diameter of the central convolutions 42, the central convolutions 42 tapering or decreasing in diameter and pitch as one moves from a center or middle portion 44 of the coil spring towards the end turns. As best shown in FIG. 2, each barrel-shaped coil spring 36 has two end portions which are not identical, an upper end portion 46 and a lower end portion 48.
Preferably, one piece of fabric is used to create the outer pockets 34 of the string 26 of pocketed springs 36, the piece of fabric being folded over onto itself around the inner pocketed coil springs 82, the cushion pads 54 and the liquid pods 55. As best shown in FIG. 2, opposite sides or plies 47, 49 of the fabric are sewn, welded or otherwise secured together to create a longitudinal seam 50 and a plurality of separating or transverse seams 52. FIG. 2 illustrates ply 47 being closest to the reader and ply 49 being behind the coil springs 36.
Although the seams or welds in the embodiments shown herein are shown as being welded spaced rectangles, any of the seams may be spaced dots, triangles or solid line segments without spaces.
As best shown in FIG. 2, opposed edges 56 of the piece of fabric used to create the string 26 of pocketed springs are aligned and spaced from the longitudinal seam 50 a distance indicated by numeral 58. Although the drawings indicated the longitudinal seam 50 being below the free edges 56 of the piece of fabric, the longitudinal seam 50 may be above the free edges 56 of the piece of fabric.
As shown in FIGS. 2 and 3, the piece of fabric used to create the string 26 has a plurality of upper ears 53 and lower ears 83. When the ears are collapsed, the string 26 has a generally planar top surface 60 in a top plane P1 and a parallel generally planar bottom surface 62 in a bottom plane P2. The linear distance between the top and bottom surfaces 60, 62 of the string 26 defines a height “H” of the string 26. This linear distance further defines the height H of the pocketed spring assembly 12 because each of the strings 26 has the same height. However, it is within the scope of the present invention that different strings of springs of a pocketed spring assembly have different heights.
As shown in FIGS. 2 and 3, in one embodiment, the transverse seams 52 of string 26 separating adjacent pockets extend from the top of an upper ear 53 of fabric to the bottom of a lower ear 83 of fabric. In an alternative embodiment shown in FIGS. 3A and 3B, the transverse seams 152 of string 126 separating adjacent pockets extend short of the upper and lower ears 53, 83 of fabric, respectively. In the alternative embodiment shown in FIGS. 3A and 3B, each transverse seam 152 is shorter than the height of the string 126 due to divides 64 described herein.
In accordance with the alternative embodiment shown in FIGS. 3A and 3B, in strings 126, the transverse seams 152 separating adjacent outer pockets 34 are divided with divides 64 which may be in the form cuts, slits, or notches created by, for example, cutting, slitting, severing, melting, or the like, from the upper surface 60 of the string 126 inwardly (downwardly as illustrated), to partially separate the adjacent outer pockets 34. Preferably, the divide 64 extends to beyond or below the liquid pod 55 but may be any desired length including less than the height of the liquid pod 55. As best shown in FIGS. 3A and 3B, the transverse seams 152 of the strings 126 each have an upper end 66 located at the bottom of each divide 64 and a lower end (not shown). As shown in FIG. 3A, the upper end 66 of each transverse seam 152 is located below adjacent liquid pod 55 when the inner pocketed coil springs 36 are in a relaxed condition and not loaded. Like the string 26b shown in FIG. 7, in a double-sided pocketed spring assembly, the lower end of each transverse seam 152 of the strings 26b may have a divide 64 extending upwardly from a lower surface 62 of the string 26b.
The significance of divide 64 may be appreciated with reference to FIG. 3B. Divide 64 essentially decouples each liquid pod 55 from its adjacent liquid pod 55 during initial deflection of liquid pod 55. This creates more of an individual coil performance and allows the inner pocketed coil spring 82 to engage a person sleeping on the mattress 10 sooner while giving the person a softer feel at the beginning of the coil deflections. It is believed that this arrangement provides a more comfortable pocketed spring assembly 12.
FIG. 6 illustrates another embodiment of string 26c which may be used in any of the pocketed spring assemblies or products shown or described herein. The string 26c comprises the same seams, same inner pocketed springs 82 and outer fabric pockets 34 as incorporated into strings 26. However, each of the outer fabric pockets 34 includes a combination pad 51 above the inner pocketed coil spring 82. The combination pad 51 comprises a cushion pad 54 and a liquid pod 55 which in combination are encased in a fabric cover 84. Each combination pad 51 has its own fabric cover 84 which prevents the coil spring 36 of the inner pocketed coil spring 82 from contacting and damaging the cushion pad or pads over time, in addition to the inner pocket 35 of fabric of the inner pocketed coil spring 82. Although FIG. 6 illustrates each combination pad 51 comprising one cushion pad 54 and one liquid pod 55 encased in a fabric cover 84, a combination pad may include more than one cushion pad and/or more than one liquid pod. It is also within the scope of the invention that the combination pad 51 comprises one liquid pod 55 and one cushion pad 54 encased in a fabric cover 84, the liquid pod 55 being closer to the inner pocketed coil spring 82.
FIG. 6A illustrates another embodiment of string 26cc which may be used in any of the pocketed spring assemblies or products shown or described herein. The string 26cc comprises the same seams, same inner pocketed springs 82 and outer fabric pockets 34 as incorporated into strings 26. However, each cushion pad 54 is encased in a fabric cover 84b and each liquid pod 55 is encased in a fabric cover 84a. Thus, each cushion pad 54 has its own fabric cover 84b which prevents the coil spring 36 of the inner pocketed coil spring 82 from contacting and damaging the cushion pad or pads over time, in addition to the inner pocket 35 of fabric of the inner pocketed coil spring 82.
FIG. 7 illustrates another embodiment of string 26b which may be used in any of the double-sided pocketed spring assemblies such as double-sided pocketed spring assembly 12b used in double-sided mattress 10b shown in FIG. 1B. Although string 26b shown in FIG. 7 is shown having the split top feature like the strings 126 shown in FIG. 3A, any strings shown or disclosed herein may lack the split top feature regarding of whether single-sided or double-sided. Any of the strings shown herein may be incorporated into any bedding or seating product, including any double-sided mattress or seating cushion. For example, while the mattresses 10, 10a and 10c illustrated in FIGS. 1, 1A and 1C, respectively, are single-sided mattresses having single-sided pocketed spring assemblies 12, 12a and 12c, respectively, incorporating single-sided strings, any of the strings shown or described herein as being single-sided, may be double-sided for use in a double-sided mattress or seating cushion. Likewise, any of the strings shown or described herein as being double-sided, may be single-sided for use in a single-sided mattress or seating cushion.
FIG. 7 illustrates a portion of a string of springs 26b used in a double-sided pocketed spring assembly, like pocketed spring assembly 12b shown in FIG. 1B. The fabric outer pockets 34b of such strings 26b are slightly different than the fabric outer pockets 34 of string of springs 26. There are divides 64 along the tops and bottoms of the strings 26b.
FIG. 7 illustrates a two-sided string 26b for use in a double-sided pocketed spring assembly 12b, as shown in FIG. 1B. Two cushion pads 54 are located inside each outer pocket 34b along with an inner pocketed spring 82b located between the cushion pads 54. One of the cushion pads 54 is located above the inner pocketed coil spring 82b and the other cushion pad 54 is located below the inner pocketed coil spring 82b. Although FIG. 7 illustrates cushion pads 54 lacking covers, encased cushion pads 51 or cushion pads of different shapes, such as shown in FIG. 2A, may be used in the double-sided string 26b or any string shown or described herein.
Two liquid pods 55 are located inside each outer pocket 34b along with two cushion pads 54 and an inner pocketed spring 82b located between the cushion pads 54 and between the liquid pods 55. One of the liquid pods 55 is located above one of the cushion pads 54 and above the inner pocketed coil spring 82b. The other liquid pod 55 is located below the other cushion pad 54 and the inner pocketed coil spring 82b. Although FIG. 7 illustrates liquid pods 55 lacking covers, encased liquid pods or liquid pods of different shapes, or any combination thereof, may be used in the double-sided string 26b or any string shown or described herein.
As shown in FIG. 7, the coil springs 36b of inner pocketed springs 82b are different than the coil springs 36 of inner pocketed springs 82 shown in FIGS. 2 and 3. Each coil spring 36b comprises a central or longitudinal axis A1, an upper end turn 38b, a lower end turn 40b and a plurality of central convolutions 42b between the end turns. FIGS. 1B and 7 illustrate a barrel-shaped coil spring 36b in which the diameter of the end turns 38b, 40b is less than the diameter of the central convolutions 42b, the central convolutions 42b tapering or decreasing in diameter and pitch as one moves from a center or middle portion 44b of the coil spring towards the end turns. As best shown in FIG. 7, each barrel-shaped coil spring 36b has two identical end portions 46b.
FIGS. 3C and 3D illustrate portions of other embodiments of strings 26d, 26e, respectively, which may be incorporated into any of the products shown or described herein. The strings 26d, 26e each comprise the same seams and outer pockets 34 as incorporated into strings 26 shown in FIGS. 2 and 3. However, the springs 36d, 36e within the strings 26d, 26e, respectively are different than the springs 36 of strings 26. Although springs 36d, 36e are only shown in FIGS. 3C and 3D, they may be used in any string shown or described herein, including two-sided strings having cushion pads and liquid pods above and below each inner pocketed coil spring regardless of the coil spring.
As shown in FIG. 3C, coil springs 36d (only one being shown) each have identical end turns 38d of a smaller diameter than the central convolutions 42d therebetween in a central portion 44d thereof. The central convolutions 42d of coil springs 36d are identical having the same diameter which is greater than the diameter of end turns 38d.
As shown in FIG. 3D, coil springs 36e (only one being shown) each have two identical end portions 46e and a central portion 44e therebetween. The central portion 44e has more convolutions than each end portion 46e, as shown in FIG. 3D. Each coil spring 36e has identical end turns 38e of a larger diameter than the central convolutions 42e therebetween of the central portion 44e. The central convolutions 42e of coil springs 36e have a smaller diameter than the diameter of end turns 38e.
FIG. 8 illustrates another embodiment of string 26d which may be used in any of the double-sided pocketed spring assemblies or products shown or described herein. The double-sided string 26d comprises the same seams, same coil springs 36b and outer fabric pockets 34b as incorporated into strings 26b shown in FIG. 7. However, each coil spring 36 lacks an inner pocket but has two individually pocketed combination pads 51.
Like the combination pads 51 shown in FIG. 6, each of the outer fabric pockets 34b includes a combination pad 51 above the coil spring 36b. However, in double-sided string 26d, a second combination pad 51 is located below the coil spring 36b. Each combination pad 51 comprises a cushion pad 54 and a buckling member 55 which in combination are encased in a fabric cover 84. Each combination pad 51 has its own fabric cover 84 which prevents un-pocketed coil spring 36b from contacting and damaging the cushion pad or pads over time.
Although string 26d is shown as a double-sided string, the concept illustrated therein of combining an un-pocketed coil spring with pocketed combination pads may be incorporated into any of the strings or pocketed spring assemblies shown or described herein, including single sided strings and single-sided pocketed spring assemblies. Any of the coil springs shown or described herein may be used in a version in which the cushion pad or pads/buckling member or buckling members is pocketed and the coil spring has no inner pocket, just an outer pocket.
FIG. 9 illustrates another embodiment of string 26e which may be used in any of the pocketed spring assemblies or products shown or described herein. The double-sided string 26e comprises transverse seams 252, same inner pocketed springs 82b including same coil springs 36b as shown in FIG. 7, cushion pads 54 and cushion members 55. Each cushion pad 54 is encased in a fabric cover 84b and each buckling member 55 is encased in a fabric cover 84a. Thus, each cushion pad 54 has its own fabric cover 84b which prevents the coil spring 36 of the inner pocketed coil spring 82 from contacting and damaging the cushion pad or pads over time, in addition to the inner pocket 35 of fabric of the inner pocketed coil spring 82.
However, each string 26e lacks divides 64 or “split top” feature. Any of the embodiments of strings or pocketed spring assemblies shown or described herein may lack the divides or “split top” feature regardless of the whether one-sided or double-sided.
FIG. 9 illustrates a side view of a pocketed liquid pod which may be substituted for the liquid pod 55 shown and described herein in any of the embodiments shown or described herein. Although many of the liquid pods 55 shown in the drawings are illustrated being un-pocketed, any of them may be individually pocketed.
FIGS. 10 and 11 illustrate another embodiment of string 226 which may be used in any single-sided pocketed spring assembly shown or described herein. FIG. 10 is a view like FIG. 2 illustrating the leftmost outer pocket 34 shown in dashed lines and the inner pocket 35 shown in solid lines. In FIG. 10, the other outer pockets 34 of string 226 are shown in solid lines and the inner pockets 35 shown in dashed lines. For ease of understanding, like numbers are used for like components when comparing the one-sided string 26 of FIGS. 2 and 3 to the one-sided string 226 of FIGS. 10 and 11. Each outer pocket 34 of one-sided string 226 of FIGS. 10 and 11 has a liquid pod 55 therein but lacks a cushioning pad 54 therein when compared to the outer pockets 34 of string 26 of FIGS. 2 and 3. Although coil spring 36 of inner pocketed coil spring 82 is shown being inside the inner pocket 35, any of the coil springs shown or described herein may be substituted for coil spring 36 inside the inner pocket 35 of inner pocketed coil spring 82. Although FIGS. 10 and 11 illustrate liquid pods 55 lacking covers, the liquid pods in this embodiment, and any other embodiment, may have covers as shown in FIG. 6A. Similarly, in this embodiment, and any other embodiment, liquid pods 55′, as shown in FIG. 2C, may be substituted for liquid pods 55.
As best shown in FIG. 11, each transverse seam 52 of one-sided string 226 has an upper ear 53 at its upper end due to the transverse seam 52 extending the full height of the one-sided string 226, from upper surface to lower surface. Although not shown, one-sided string 226 may alternatively have transverse seams 152 with an upper divide 64, as shown in the alternative embodiment of string 126 shown in FIGS. 3A and 3B.
FIG. 12 illustrates a double-sided string 226b for use in a double-sided pocketed spring assembly, such as pocketed spring assembly 12b shown in FIG. 1B for example. The double-sided string 226b is identical to double-sided string 26b shown in FIG. 7, but without cushion pads 54 inside each outer pocket 34b. Although FIG. 12 illustrates liquid pods 55 lacking covers, the liquid pods in this embodiment, and any other embodiment, may have covers as shown in FIG. 6A. Similarly, in this embodiment, and any other embodiment, liquid pods 55′, as shown in FIG. 2C, may be substituted for liquid pods 55.
Two liquid pods 55 and an inner pocketed spring 82b located between the liquid pods 55 are located inside each outer pocket 34b. One of the liquid pods 55 is located above the inner pocketed coil spring 82b. The other liquid pod 55 is located below the other cushion pad 54 and the inner pocketed coil spring 82b. Although coil spring 36b of inner pocketed coil spring 82b is shown being inside the inner pocket 35, any of the coil springs shown or described herein may be substituted for coil spring 36b inside the inner pocket 35 of inner pocketed coil spring 82b. Although FIG. 12 illustrates liquid pods 55 lacking covers, encased liquid pods or liquid pods of different shapes, or any combination thereof, may be used in the double-sided string 26b or any string shown or described herein.
Like the double-sided string 26b shown in FIG. 7, the double-sided string 226b of FIG. 12 has transverse seams 152. The upper end of each transverse seam 152 of the string 226b has a divide 64 extending downwardly from an upper surface 60 of the string 226b. Similarly, the lower end of each transverse seam 152 of the string 226b has a divide 64 extending upwardly from a lower surface 62 of the string 226b. Although not shown, each of the transverse seams of double-sided string 226b may have upper and lower ears 53, 83 without divides like in the double-sided string 26 of FIG. 3C.
FIG. 13 is a schematic illustration of a cross-section of a single-sided string 90 for use in a single-sided pocketed spring assembly. The single-sided string 90 comprises an outer pocket 92 having a height H1. A main member 94 having a height H3 is located inside the outer pocket 92 at the bottom thereof. A supplemental member 96 having a height H2 is located above the main member 94 inside the outer pocket 92. The sum of the heights H3, H2 of the main and supplemental members 94, 96, respectively, is approximately the same as the height H1 of the single-sided string 90. The drawings are not intended to limit the heights of the main and supplemental members 94, 96 to those illustrated. The main member 94 may be a pocketed spring, a non-pocketed spring or a pocketed or non-pocketed foam member. The supplemental member 96 may be a pocketed or non-pocketed liquid pod. Although FIG. 13 illustrates the main and supplemental members 94, 96, respectively, being cylindrical, either one of them may be any desired shape.
FIG. 14 is a schematic illustration of a cross-section of a single-sided string 98 for use in a single-sided pocketed spring assembly. The single-sided string 98 comprises an outer pocket 100 having a height H4. A main member 102 having a height H5 is located inside the outer pocket 100 at the bottom thereof. A first supplemental member 104 having a height H6 is located above the main member 102 inside the outer pocket 100. A second supplemental member 106 having a height H7 is located above the first supplemental member 104 inside the outer pocket 100. The sum of the heights H5, H6 and H7 of the main and supplemental members 102, 104, 106, respectively, is approximately the same as the height H4 of the single-sided string 98. The drawings are not intended to limit the heights of the main and supplemental members 102, 104, 106 to those illustrated. The main member 102 may be a pocketed spring, a non-pocketed spring or a pocketed or non-pocketed foam member. The first supplemental member 104 may be a pocketed spring, a non-pocketed spring or a pocketed or non-pocketed foam member. The second supplemental member 106 may be a pocketed or non-pocketed liquid pod. Although FIG. 14 illustrates the main and supplemental members 102, 104, 106, respectively, being cylindrical, either one of them may be any desired shape.
FIG. 14A is a schematic illustration of a cross-section of a single-sided string 98′ for use in a single-sided pocketed spring assembly. The single-sided string 98′ is identical to single-sided string 98 of FIG. 14 except that the placement of the first supplemental member 104 is reversed relative to the placement of the second supplemental member 106.
FIG. 15 is a schematic illustration of a cross-section of a single-sided string 108 for use in a single-sided pocketed spring assembly. The single-sided string 108 comprises an outer pocket 110 having a height H8. A main member 112 having a height H9 is located inside the outer pocket 110 at the bottom thereof. A first supplemental member 114 having a height H10 is located above the main member 112 inside the outer pocket 110. A second or middle supplemental member 116 having a height H11 is located above the first supplemental member 114 inside the outer pocket 110. A third supplemental member 118 having a height H12 is located above the second or middle supplemental member 116 inside the outer pocket 110. The sum of the heights H9, H10, H11 and H12 of the main and supplemental members 112, 114, 116, 118 respectively, is approximately the same as the height H8 of the single-sided string 108. The drawings are not intended to limit the heights of the main and supplemental members 112, 114, 116, 118 to those illustrated. The main member 112 may be a pocketed spring, a non-pocketed spring or a pocketed or non-pocketed foam member. The first supplemental member 114 may be a pocketed spring, a non-pocketed spring, a pocketed or non-pocketed foam member. The second supplemental member 116 may be a pocketed spring, a non-pocketed spring, a pocketed or non-pocketed foam member. The third supplemental member 118 may be a pocketed or non-pocketed liquid pod. Although FIG. 15 illustrates the main and supplemental members 112, 114, 116, 118 respectively, being cylindrical, any one of them may be any desired shape.
FIG. 15A is a schematic illustration of a cross-section of a single-sided string 108′ for use in a single-sided pocketed spring assembly. The single-sided string 108′ is identical to single-sided string 108 except that the placement of the second supplemental member 116 is reversed relative to the placement of the third supplemental member 118.
FIG. 16 is a schematic illustration of a double-sided string 290 for use in a double-sided pocketed spring assembly. The double-sided string 290 comprises a main member 294 and two supplemental members 296 encased by an outer pocket 292. As shown in FIG. 16, the double-sided string 290 in a relaxed condition has a height HH1. The main member 294 has a height HH3 and is located inside the outer pocket 292 between the two supplemental members 296. Each supplemental member 296 inside the outer pocket 292 has a height HH2. The sum of the heights HH3, HH2 of the main and supplemental members 294, 296 is approximately the same as the height HH1 of the double-sided string 290 when the double-sided string 290 is in a relaxed condition as shown in FIG. 16. The drawings are not intended to limit the heights of the main and supplemental members 294, 296 to those illustrated. The main member 294 may be a pocketed spring, a non-pocketed spring or a pocketed or non-pocketed foam member. Each supplemental member 296 may be a pocketed or non-pocketed liquid pod. Although FIG. 16 illustrates the main and supplemental members 294, 296 being generally cylindrical, any of them may be any desired shape.
FIG. 17 is a schematic illustration of a cross-section of a double-sided string 298 for use in a double-sided pocketed spring assembly. The double-sided string 298 comprises a main member 202, two inner supplemental members 204 and two outer supplemental members 206. The main member 202, two inner supplemental members 204 and two outer supplemental members 206 are encased by an outer pocket 200. As shown in FIG. 17, the double-sided string 298 in a relaxed condition has a height HH4. The main member 202 has a height HH5 and is located between the two inner supplemental members 204 inside the outer pocket 200. Each inner supplemental member 204 has a height HH6. An upper or first inner supplemental member 204 is located above the main member 202 inside the outer pocket 200. A lower or second inner supplemental member 204 is located below the main member 202 inside the outer pocket 200. An upper outer supplemental member 206 having a height HH7 is located above the upper inner supplemental member 204 inside the outer pocket 200. A second or lower outer supplemental member 206 having a height HH7 is located below the lower inner supplemental member 204 inside the outer pocket 200. The sum of the heights HH5, HH6 and HH7 of the main and supplemental members 202, 204, 206, respectively, is approximately the same as the height HH4 of the double-sided string 298 when the double-sided string 298 is in a relaxed condition. The drawings are not intended to limit the heights of the main and supplemental members 202, 204, 206 to those illustrated. The main member 202 may be a pocketed spring, a non-pocketed spring or a pocketed or non-pocketed foam member. Each inner supplemental member 204 may be a pocketed spring, a non-pocketed spring, a pocketed or non-pocketed foam member. Each outer supplemental member 206 may be pocketed or non-pocketed liquid pod. Although FIG. 17 illustrates the main and supplemental members 202, 204, 206, respectively, being certain shapes, any one of them may be any desired shape.
FIG. 17A is a schematic illustration of a cross-section of a double-sided string 298′ for use in a single-sided pocketed spring assembly. The double-sided string 298′ is identical to double-sided string 298 of FIG. 17 except that the placement of the supplemental member 204 is reversed relative to the placement of the supplemental member 206.
FIG. 18 is a schematic illustration of a cross-section of a double-sided string 208 for use in a double-sided pocketed spring assembly. The double-sided string 208 comprises an outer pocket 210, two inner supplemental members 214, two middle supplemental members 216 and two outer supplemental members 218. The main member 212, two inner supplemental members 214, two middle supplemental members 216 and two outer supplemental members 218 are encased by an outer pocket 110. As shown in FIG. 18, the double-sided string 208 in a relaxed condition has a height HH8. The main member 212 has a height HH9 and is located between the two inner supplemental members 214 inside the outer pocket 210. Each inner supplemental member 214 has a height HH10. An upper or first inner supplemental member 214 is located above the main member 212 inside the outer pocket 208. A lower or second inner supplemental member 214 is located below the main member 212 inside the outer pocket 210. An upper middle supplemental member 216 having a height HH11 is located above the upper inner supplemental member 214 inside the outer pocket 210. A second or lower middle supplemental member 216 having a height HH11 is located below the lower inner supplemental member 214 inside the outer pocket 210. An upper outer supplemental member 218 having a height HH12 is located above the upper middle supplemental member 216 inside the outer pocket 210. A second or lower outer supplemental member 218 having a height HH12 is located below the middle supplemental member 216 inside the outer pocket 210. The sum of the heights HH9, HH10, HH11 and HH12 of the main and supplemental members 212, 214, 216, 218, respectively, is approximately the same as the height HH8 of the double-sided string 208 when the double-sided string 208 is in a relaxed condition. The drawings are not intended to limit the heights of the main and supplemental members 212, 214, 216, 218 to those illustrated. The main member 212 may be a pocketed spring, a non-pocketed spring, a pocketed or non-pocketed foam member. Each inner supplemental member 214 may be a pocketed spring, a non-pocketed spring, a pocketed or non-pocketed foam member. Each middle supplemental member 216 may be a pocketed spring, a non-pocketed spring, a pocketed or non-pocketed foam member. Each outer supplemental member 218 may be a pocketed or non-pocketed liquid pod. Although FIG. 18 illustrates the main and supplemental members 212, 214, 216, 218, respectively, being certain shapes, any one of them may be any desired shape.
FIG. 18A is a schematic illustration of a cross-section of a double-sided string 208′ for use in a double-sided pocketed spring assembly. The double-sided string 208′ is identical to single-sided string 208 of FIG. 18 except that the placement of the second supplemental member 216 is reversed relative to the placement of the third supplemental member 218.
As shown in FIGS. 13-18, whether a string is single-sided or double-sided, without its fabric outer cover, any number of combinations of springs, foam and buckling members are possible. Any one or more of the springs, foam and liquid pods may be encased in its own fabric cover. Any one or more of the springs, foam and liquid pods may be any desired shape.
Referring now to FIG. 19, longitudinally extending strings of springs are shown in one preferable arrangement for a pocketed spring assembly 12d for a bedding or seating product, such as a mattress. As can be seen, the longitudinally extending strings of springs are arranged in a plurality of zones. By way of example, two zones 72, 44 are illustrated, with the zones corresponding roughly to a “warm” side and a “cool” side. By way of further example, the longitudinally extending strings of springs of the “warm” zone 72 are each strings of springs having no liquid pods as shown and described herein. The longitudinally extending strings of springs of the “cool” zone 74 are each strings of springs having liquid pods in the outer pockets thereof. Of course, other arrangements are within the scope of the invention. For example, the mattress shown in FIG. 15A may comprise transversely extending strings of springs rather than longitudinally extending strings of springs. In such an arrangement, each transversely extending string of springs would have to be half firm and half soft. Therefore, each string of springs would have only half the string having the liquid pods, the other half lacking liquid pods. Of course, other arrangements are within the scope of the invention. For example, the pocketed spring assembly shown in FIG. 19 may have a certain type of liquid pod in the strings of one of the sections and different liquid pods in the other section.
Referring now to FIG. 20, the transversely extending strings of springs are shown in one preferable arrangement for a pocketed spring assembly 12e for a bedding or seating product, such as a mattress. As can be seen, the transversely extending strings of springs are arranged in a plurality of zones on the mattress. By way of example, three zones are illustrated, with the zones corresponding roughly to the location of a sleeper's head and shoulders, mid-section, knees and feet. By way of further example, the two end “warm” zones 86 each comprise strings of springs having no liquid pods as shown and described herein. The transversely extending strings of springs of the middle or “warm” zone 88 are each strings of springs having liquid pods. Of course, other arrangements are within the scope of the invention. For example, the pocketed spring assembly shown in FIG. 20 may have a certain type of liquid pod in the strings of the middle section and different liquid pods in the two end sections.
The various embodiments of the invention shown and described are merely for illustrative purposes only, as the drawings and the description are not intended to restrict or limit in any way the scope of the claims. Those skilled in the art will appreciate various changes, modifications, and improvements which can be made to the invention without departing from the spirit or scope thereof. The invention in its broader aspects is therefore not limited to the specific details and representative apparatus and methods shown and described. Departures may therefore be made from such details without departing from the spirit or scope of the general inventive concept. For example, more than two cushion pads or more than one inner pocketed spring may be inside an outer pocket. The invention resides in each individual feature described herein, alone, and in all combinations of any and all of those features. Accordingly, the scope of the invention shall be limited only by the following claims and their equivalents.
Patent Application
20230088072
