This disclosure relates generally to cushioning elements and more specifically to cushioning elements with pressurizable cells. Even more specifically, this disclosure relates to cushioning elements with pressurizable cells that extend across the widths of the cushioning elements and are arranged in series along the lengths of the cushioning elements. Such a cushioning element may be part of a mattress of a so-called “airbed,” a hybrid mattress, a mattress topper, or any of a variety of other types of cushions. This disclosure also relates to methods for manufacturing cushioning elements that include pressurizable cells.
A cushioning element according to this disclosure includes a planar intermediate element, a series of first bladders on a first side (e.g., a top side, a bottom side, etc.) of the planar intermediate element, a series of second bladders on a second side (e.g., a bottom side, a top side, etc.) of the planar intermediate element, and a plurality of apertures extending through the planar intermediate element. Each first bladder may extend over at least one aperture through the planar intermediate element and be completely superimposed with a corresponding second bladder to define a pressurizable cell (or, more simply, a cell) of the cushioning element. Thus, the series of first bladders, the planar intermediate element, and the series of second bladders may define a series of cells of the cushioning element. Conduits may extend between at least some adjacent cells or, more specifically, between adjacent first bladders and/or adjacent second bladders.
The first side, or a first surface, of the planar intermediate element is opposite from the second side, or a second surface, of the planar intermediate element. Thus, the first side may define a top side of the planar intermediate element while the second side may define a bottom side of the planar intermediate element. Alternatively, the first side may define a bottom side of the planar intermediate element while the second side may define a top side of the planar intermediate element. In addition to the first side and the second side, the planar intermediate element has a length and a width.
Again, a plurality of apertures may extend through the planar intermediate element, from the first side to the second side. The apertures may be arranged in one or more columns along the length of the planar intermediate element. The apertures may also be arranged in rows across the width of the planar intermediate element. In some embodiments, an array of apertures may be defined through the planar intermediate element.
Each first bladder may be arranged over a row of apertures through the planar intermediate element and extend substantially or completely across the width of the planar intermediate element. As used in this context, the term “substantially” indicates that side edges of the planar intermediate element may extend slightly beyond (e.g., by about 1 cm or less, about 5 mm or less, about 2 mm or less, about 1 mm or less, etc.) ends each first bladder. Edges (e.g., a top edge, a bottom edge, end edges, etc.) of each first bladder may be secured to and sealed against the first side of the planar intermediate element. Together, the first bladder, its edges, and the portion of the planar intermediate element covered by the first bladder may define a first chamber. In some embodiments, including but not limited to embodiments where the first bladder is to be independent from an adjacent first bladder, an entire edge of the first bladder may be secured to and sealed against the first side of the planar intermediate element. In embodiments where the first bladder is to communicate with an adjacent first bladder, an intermediate portion of the edge between the adjacent first bladders may remain unsealed from the first side of the planar intermediate element to define a conduit between the adjacent first bladders. In some embodiments, each first bladder may be semi-cylindrical in shape.
Each second bladder may also be arranged over a row of apertures through the planar intermediate element and extend substantially or completely across the width of the planar intermediate element. Edges (e.g., a top edge, a bottom edge, end edges, etc.) of each second bladder may be secured to and sealed against the second side of the planar intermediate element. Together, the second bladder, its edges, and the portion of the planar intermediate element covered by the second bladder may define a second chamber. In some embodiments, including but not limited to embodiments where the second bladder is to be independent from an adjacent second bladder, an entire edge of the second bladder may be secured to and sealed against the second side of the planar intermediate element. In embodiments where the second bladder is to communicate with an adjacent second bladder, an intermediate portion of the edge between the adjacent second bladders may remain unsealed from the second side of the planar intermediate element to define a conduit between the adjacent second bladders. In some embodiments, each second bladder may be semi-cylindrical in shape.
In embodiments where each first bladder and each second bladder extends across the width of the planar intermediate element and the series of first bladders, the series of second bladders extend along the length of the planar intermediate element, and each of the first bladders is completely superimposed with a corresponding second bladder, the first bladders, corresponding second bladders, and portions of the planar intermediate element therebetween may define a series of cells. Each cell may extend across a width of the cushioning element. The series of cells may be arranged along a length of the cushioning element. In embodiments where a first bladder and a corresponding bladder are semi-cylindrical in shape and completely superimposed with each other, the resulting cell may be cylindrical in shape.
Various cells of the cushioning element may be grouped together. For example, a first set of cells may be located adjacent to a first end of the cushioning element (e.g., a head of the cushioning element, etc.), while a second set of cells may be located adjacent to a second end of the cushioning element (e.g., a foot of the cushioning element, etc.). In some embodiments, a third set of cells or even further sets of cells may be located between the first set and the second set (e.g., at one or more intermediate locations along the length of the cushioning element, etc.). In some embodiments, the cells of each set may communicate with each other (e.g., by way of conduits therebetween, etc.) but not with the cells of any other group.
As an alternative to separate sets of cells (e.g., separately pressurizable sets of cells, etc.) formed using the same planar intermediate element, a series of cushioning elements may be positioned adjacent to one another. In such embodiments, one or more of the cushioning elements may include cells that communicate with each other (e.g., by way of conduits therebetween, etc.).
The ends of the first bladders and the second bladders may be sealed in any suitable manner. For example, a cap may be assembled with and sealed to each end of each cell defined by a first bladder and second bladder that correspond to one another and against locations on the planar intermediate element adjacent to peripheries of the corresponding first bladder and second bladder.
In another aspect, methods for manufacturing a cushioning element are disclosed. Such a method includes providing a planar intermediate element, positioning at least one first sheet of material over a first side of the planar intermediate element, and selectively securing portions of the at least one first sheet to a first side of the planar intermediate element. Such selective securing may include securing spaced-apart, parallel locations of the at least one first sheet to corresponding spaced-apart, parallel locations extending substantially across the width of the planar intermediate element on the first side of the planar intermediate element. The result of such selective securing may include the definition of a series of first bladders over the first surface. The locations at which the at least one first sheet is secured to the first side may result in the definition of a first bladder that extends over at least one aperture the planar intermediate element.
In addition to securing the at least one first sheet to the first side of the planar intermediate element, the method includes positioning at least one second sheet of material over a second side of the planar intermediate element and selectively securing portions of the at least one second sheet to the second side of the planar intermediate element. Such selective securing may include securing spaced-apart, parallel locations of the at least one second sheet to corresponding spaced-apart, parallel locations extending substantially across the width of the planar intermediate element on the second side of the planar intermediate element. The result of such selective securing may include the definition of a series of second bladders over the second surface. The locations at which the at least one second sheet is secured to the second side may result in the definition of a second bladder that extends over at least one aperture the planar intermediate element. In embodiments where the second bladders are completely superimposed with the first bladders, the result of such selective securing may also the definition of a series of pressurizable cells arranged along a length of the cushioning element.
A first sheet may be used to define a plurality of adjacent first bladders, including the first bladders of a set of cells of the cushioning element. In some embodiments, a single first sheet may be used to define all of the first bladders of a cushioning element. Similarly, a plurality of second bladders (e.g., a set of second bladders, all of the second bladders, etc.) may be defined with a second sheet.
In some embodiments, selective securing of a first sheet and/or a second sheet to a corresponding first side and/or second side of the planar intermediate element may include sealing the first sheet and/or second sheet to the corresponding first side and/or second side across an entire width of the first sheet and/or second sheet. In other embodiments, the first sheet and/or second sheet may remain unsealed from the first side and/or second side at one or more intermediate locations to define a conduit between adjacent bladders.
Ends of the first bladders and the second bladders may be sealed. In some embodiments, ends of the first and second bladders may be sealed by securing the ends to and sealing the ends against the corresponding first and second sides of the planar intermediate element. In other embodiments, a cap may be assembled with and sealed to an end of each cell defined by a first bladder and its corresponding second bladder.
Other aspects of the disclosed subject matter, as well as features and advantages of various aspects of the disclosed subject matter, should become apparent to those of ordinary skill in the art from the preceding disclosure, the description and drawings that follow, and the appended claims.
In the drawings:
As depicted by
As shown in
The planar intermediate element 23 may be formed from any suitable material. In some embodiments, the planar intermediate element 23 may be made from the same material used to form the first bladder 21 and the second bladder 22. The planar intermediate element 23 may be formed from a sheet of a polymeric material (e.g., a plastic). The planar intermediate element 23 may be flexible. Alternatively, the planar intermediate element 23 may be somewhat rigid. A rigidity of the planar intermediate element 23 may be due the material from which it is formed, a thickness of the sheet that defines it, or a combination of material and sheet thickness.
The first bladders 21 and second bladders 22 may be formed from a pliable material, such as a polymeric film, that is impermeable or substantially impermeable (e.g., accounting for tolerable rates of decreased pressure (e.g., 1 psi per 24 hours, 1 psi per 48 hours, 1 psi per 72 hours, 1 psi per week, etc.) to one or more suitable gases (e.g., nitrogen, air, etc.) under ambient conditions (e.g., pressure, room temperature, etc.). A pliability of the first bladders 21 and the second bladders 22 may be attributed to the material used to form the first bladders 21 and the second bladders 22, a film thickness of the material, or a combination thereof.
In some embodiments, a single sheet of pliable material may be used to form a plurality of adjacent first bladders 21 or second bladders 22, with various spaced-apart portions that extend at least partially across a width of the sheet material and are secured to and sealed against the planar intermediate element 23 defining the edges of the adjacent first bladders 21 or second bladders 22. In some embodiments, a single sheet of pliable material may be used to form all of the first bladders 21 on the first side 24 of the planar intermediate element 23. Similarly, a single sheet of pliable material may be used to form all of the second bladders 22 on the second side 25 of the planar intermediate element 23. The material from which the first bladders 21 and second bladders 22 are made may be less rigid than a material from which the planar intermediate element 23 is made.
In other embodiments, a single sheet of material may be used to form the planar intermediate element 23, the first bladders 21, and the second bladders 22.
As illustrated by
With returned reference to
The cells 20 of each set 31, 32, 33, etc., may communicate with one another by way of one or more conduits 40 between adjacent cells 20, as illustrated by
The conduits 40 may be positioned relatively centrally, or away from the ends 28 and 29 of the cells 20 they establish communication between. Alternatively, as depicted, the conduits 40 may be spaced evenly, or equidistantly, between the ends 28 and 29 of the cells 20 they extend between. As another option, the conduits 40 may be positioned adjacent to, along, or near the ends 28 and 29 of the cells 20 they establish communication between. As yet another option, the conduits 40 may establish communication between adjacent cells through adjacent ends 28 or 29 of the adjacent cells 20; such a conduit 40 may be located beyond, or outside, of the ends 28 or 29 of the cells 20. It should be appreciated that the conduits 40 may be positioned at any of a variety of locations relative to the widths W of the cells 20 they connect. In some embodiments, conduits 40 may connect cells 20 that are not adjacent to each other.
Notably, conduits 40 do not extend between adjacent cells 20 of different sets 31, 32, 33, etc., which enables each set 31, 32, 33, etc., to be pressurized independently of other sets 31, 32, 33, etc.
Referring again to
In addition to securing the at least one first sheet 21′ to the first side 24 of the planar intermediate element 23, at least one second sheet 22′ of material may be positioned over the second side 25 of the planar intermediate element 23. Portions (e.g., linear portions, etc.) of the at least one second sheet 22′ may be secured to the second side 25 of the planar intermediate element 23 (e.g., by way of thermal bonding, welding, use of an adhesive, etc.). Such a portion may extend continuously across a width of the at least one second sheet 22′ or it may include one or more gaps that may define one or more conduits 40. Spaced-apart, parallel locations of the at least one second sheet 22′ may be secured to corresponding spaced-apart, parallel locations extending substantially across the width of the planar intermediate element 23 on the second side 24 of the planar intermediate element 23. The spaced-apart, parallel locations may be on opposite sides of a row 26r of apertures 26 and between adjacent rows 26r of apertures 26. The result of such selective securing may include the definition of a series of second bladders 22 over the second surface 25. The locations at which the at least one second sheet 22′ is secured to the second side 24 may result in the definition of a second bladder 22 that extends over a row 26r of apertures 26 through the planar intermediate element 23. In embodiments where the second bladders 22 are completely superimposed with the first bladders 21, the result of such selective securing may also the definition of a series 30 of cells 22 arranged along the length L of the cushioning element 10.
In some embodiments, locations adjacent to edges of the at least one first sheet 21′ and the at least one second sheet 22′ may be secured to the first side 24 and second side 25, respectively, of the planar intermediate sheet 23 to define ends of the first bladders 21 and the second bladders 22 and, thus, ends of the cells 22. Alternatively, a cap (not shown) may be assembled with and sealed to an end of each cell 20.
Turning now to
Furthermore, it should be appreciated that the cushioning element 10 may include a single pressure source 50 connected to a plurality of sets 31, 32, 33, etc., or to each set 31, 32, 33, etc., of cells 20, with a valve determining the set 31, 32, 33, etc., to which the pressure source 50 will communicate, or cause, a pressure change (e.g., inflation, deflation, etc.). Alternatively, a plurality of pressure sources 50 may be fluidly connected to the cushioning element 10, with each pressure source 50 dedicated and fluidly connected to a specific set 31, 32, 33, etc., of cells 20 to allow for appropriate pressurization of that set 31, 32, 33, etc. Access to each set 31, 32, 33, etc., may be from either of the ends 28 and 29 of a cell 20 or from any number of locations of each set 31, 32, 33, etc., or each cell 20 or the cushioning element 10.
The cushioning element 10 may be combined with one or more other elements of a cushion 100, such as a cover 70, one or more cushioning layers 80, 82, 84, etc. (e.g., foam 82, 84, memory foam 84, elastomeric grid 80, coils 86, etc.), and support 90 and foundational elements 92 to define a mattress, a mattress topper, or any of a variety of other embodiments of cushions 100. Without limitation, such a cushion 100 may comprise mattress such as that described by U.S. Pat. No. 11,213,139, the entire disclosure of which is hereby incorporated herein.
Although the preceding disclosure provides many specifics, these should not be construed as limiting the scope of any of the claims that follow, but merely as providing illustrations of some embodiments of elements and features of the disclosed subject matter. Other embodiments of the disclosed subject matter, and of their elements and features, may be devised which do not depart from the spirit or scope of any of the claims. Features from different embodiments may be employed in combination. Accordingly, the scope of each claim is limited only by its plain language and the legal equivalents thereto.
A claim for priority to the Feb. 26, 2021 filing date of U.S. Provisional Patent Application No. 63/154,423, titled CUSHIONING ELEMENTS WITH PRESSURIZABLE CELLS (“the '423 Provisional Application”), is hereby made pursuant to 35 U.S.C. § 119(e). The entire disclosure of the '432 Provisional Application is hereby incorporated herein.
Number | Date | Country | |
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63154423 | Feb 2021 | US |