Abstract:
A device comprises a key containing an upper closed chamber with a first gel and a lower closed chamber with a second gel. The key contains a divider portion interposedly common to the upper chamber and the lower chamber. The portion laterally traverses the key.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority to U.S. Provisional Patent Application Ser. No. 61/807,984, filed on Apr. 3, 2013, which is herein fully incorporated by reference for all purposes. 
    
    
     TECHNICAL FIELD 
     Generally, the present disclosure relates to keys. More particularly, the present disclosure relates to multi-chamber keys. 
     BACKGROUND 
     In the present disclosure, where a document, an act and/or an item of knowledge is referred to and/or discussed, whether directly and/or indirectly, then this reference and/or discussion is not an admission that the document, the act and/or the item of knowledge and/or any combination thereof was at the priority date, publicly available, known to the public, part of common general knowledge and/or otherwise constitutes prior art under the applicable statutory provisions and/or is known to be relevant to an attempt to solve any problem with which the present disclosure is concerned. 
     Carpal tunnel syndrome (CTS) is a medical condition affecting many people worldwide. CTS is commonly believed to result from a combination of factors. One of such factors often involves extensive computer keyboard use. Resultantly, whether at workplace, at school and/or at home, many computer keyboard users are advised to adjust their surroundings, reduce stress on hands/wrists, position themselves properly and/or perform hands/wrists exercises. Similarly, at least due to potential reduction in worker productivity, many corporations are now taking action, such as modifying/replacing work equipment and/or changing work operations, in order to reduce occurrences of CTS. Although such advice and/or action have been somewhat effective, many people still suffer from CTS. 
     While certain aspects of conventional technologies have been discussed to facilitate the present disclosure, no technical aspects are disclaimed. The claims may encompass one and/or more of the conventional technical aspects discussed herein. 
     BRIEF SUMMARY 
     According to an example embodiment of the present disclosure a device comprises a key containing an upper closed chamber with a first gel and a lower closed chamber with a second gel. The key contains a divider portion interposedly common to the upper chamber and the lower chamber. The portion laterally traverses the key. 
     The present disclosure may be embodied in the form illustrated in the accompanying drawings. Attention is called to the fact, however, that the drawings are illustrative. Variations are contemplated as being part of the disclosure, limited only by the scope of the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings illustrate example embodiments of the present disclosure. Such drawings are not to be construed as necessarily limiting the disclosure. Like numbers and/or similar numbering scheme can refer to like and/or similar elements throughout. 
         FIG. 1  shows a perspective view of an example embodiment of a computer keyboard key according to the present disclosure. 
         FIG. 2  shows a cross-sectional view of an example embodiment of a computer keyboard key having an upper chamber and a lower chamber according to the present disclosure. 
         FIG. 3A  shows a cross-sectional view of an example embodiment of a computer keyboard key having an upper chamber more voluminous than a lower chamber than according to the present disclosure. 
         FIG. 3B  shows a cross-sectional view of an example embodiment of a computer keyboard key having an upper chamber less voluminous than a lower chamber than according to the present disclosure. 
         FIG. 4A  shows a cross-sectional view of an example embodiment of a computer keyboard key where cushion gels are identical to each other according to the present disclosure. 
         FIG. 4B  shows a cross-sectional view of an example embodiment of a computer keyboard key where cushion gels are different from each other according to the present disclosure. 
         FIG. 5A  shows a side view of an example embodiment of a computer key having inclined sidewalls and a curved top surface according to the present disclosure. 
         FIG. 5B  shows a side view of an example embodiment of a computer key having inclined sidewalls and a linear top surface according to the present disclosure. 
         FIG. 5C  a side view of an example embodiment of a computer key having non-inclined sidewalls and a linear top surface according to the present disclosure. 
         FIG. 6  shows a perspective view of an example embodiment of a laptop computer having a key with at least two chambers according to the present disclosure. 
         FIG. 7  shows a perspective view of an example embodiment of a wired computer keyboard having a key with at least two chambers according to the present disclosure. 
         FIG. 8  shows a perspective view of an example embodiment of a wireless computer keyboard having a key with at least two chambers according to the present disclosure. 
         FIG. 9  shows a perspective view of an example embodiment of a musical keyboard having a key with at least two chambers according to the present disclosure. 
         FIG. 10  shows a cross-sectional view of an example embodiment of a computer keyboard key defining an open space below a lower chamber according to the present disclosure. 
         FIG. 11  shows a cross-sectional view of an example embodiment of a computer keyboard key with at least three chambers according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The present disclosure is now described more fully with reference to the accompanying drawings, in which example embodiments of the present disclosure are shown. The present disclosure may, however, be embodied in many different forms and should not be construed as necessarily being limited to the example embodiments disclosed herein. Rather, these example embodiments are provided so that the present disclosure is thorough and complete, and fully conveys the concepts of the present disclosure to those skilled in the relevant art. In addition, features described with respect to certain example embodiments may be combined in and/or with various other example embodiments. Different aspects and/or elements of example embodiments, as disclosed herein, may be combined in a similar manner. 
     The terminology used herein can imply direct or indirect, full or partial, temporary or permanent, action or inaction. For example, when an element is referred to as being “on,” “connected” or “coupled” to another element, then the element can be directly on, connected or coupled to the other element and/or intervening elements may be present, including indirect and/or direct variants. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. 
     Although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not necessarily be limited by such terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer, or section discussed below could be termed a second element, component, region, layer, or section without departing from the teachings of the present disclosure. 
     The terminology used herein is for describing particular example embodiments only and is not intended to be necessarily limiting of the present disclosure. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “includes” and/or “comprising,” “including” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     Example embodiments of the present disclosure are described herein with reference to illustrations of idealized embodiments (and intermediate structures) of the present disclosure. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the example embodiments of the present disclosure should not be construed as necessarily limited to the particular shapes of regions illustrated herein, but are to include deviations in shapes that result, for example, from manufacturing. 
     Any and/or all elements, as disclosed herein, can be formed from a same, structurally continuous piece, such as being unitary, and/or be separately manufactured and/or connected, such as being an assembly and/or modules. Any and/or all elements, as disclosed herein, can be manufactured via any manufacturing processes, whether additive manufacturing, subtractive manufacturing, and/or other any other types of manufacturing. For example, some manufacturing processes include three dimensional (3D) printing, laser cutting, computer numerical control routing, milling, pressing, stamping, vacuum forming, hydroforming, injection molding, lithography, and so forth. 
     Any and/or all elements, as disclosed herein, can include, whether partially and/or fully, a solid, including a metal, a mineral, an amorphous material, a ceramic, a glass ceramic, an organic solid, such as wood and/or a polymer, such as rubber, a composite material, a semiconductor, a nanomaterial, a biomaterial and/or any combinations thereof. Any and/or all elements, as disclosed herein, can include, whether partially and/or fully, a coating, including an informational coating, such as ink, an adhesive coating, a melt-adhesive coating, such as vacuum seal and/or heat seal, a release coating, such as tape liner, a low surface energy coating, an optical coating, such as for tint, color, hue, saturation, tone, shade, transparency, translucency, non-transparency, luminescence, reflection, anti-reflection and/or holography, a photo-sensitive coating, an electronic and/or thermal property coating, such as for passivity, insulation, resistance or conduction, a magnetic coating, a water-resistant and/or waterproof coating, a scent coating and/or any combinations thereof. Any and/or all elements, as disclosed herein, can be rigid, flexible, and/or any other combinations thereof. Any and/or all elements, as disclosed herein, can be identical and/or different from each other in material, shape, size, color and/or any measurable dimension, such as length, width, height, depth, area, orientation, perimeter, volume, breadth, density, temperature, resistance, and so forth. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized and/or overly formal sense unless expressly so defined herein. 
     Furthermore, relative terms such as “below,” “lower,” “above,” and “upper” may be used herein to describe one element&#39;s relationship to another element as illustrated in the accompanying drawings. Such relative terms are intended to encompass different orientations of illustrated technologies in addition to the orientation depicted in the accompanying drawings. For example, if a device in the accompanying drawings were turned over, then the elements described as being on the “lower” side of other elements would then be oriented on “upper” sides of the other elements. Similarly, if the device in one of the figures were turned over, elements described as “below” or “beneath” other elements would then be oriented “above” the other elements. Therefore, the example terms “below” and “lower” can encompass both an orientation of above and below. 
     As used herein, the term “about” and/or “substantially” refers to a +/−10% variation from the nominal value/term. Such variation is always included in any given value/term provided herein, whether or not such variation is specifically referred thereto. 
     If any disclosures are incorporated herein by reference and such disclosures conflict in part and/or in whole with the present disclosure, then to the extent of conflict, and/or broader disclosure, and/or broader definition of terms, the present disclosure controls. If such disclosures conflict in part and/or in whole with one another, then to the extent of conflict, the later-dated disclosure controls. 
       FIG. 1  shows a perspective view of an example embodiment of a computer keyboard key according to the present disclosure. 
     A key  100  includes a key body  102  having a plurality of sidewalls  104  meeting at a plurality of corners  106 . Body  102  also includes a top surface  108  from which sidewalls  104  extend downwardly therefrom. Sidewalls  104 , corners  106  and/or surface  108  can be unitary and/or an assembly. Whether inwardly and/or outwardly, any and/or entire portion of at least one of corners  106  can be rounded, curved or sharp. Sidewalls  104  can be a single wall as well. In other embodiments, corners  106  are lacking, such as when body  102  is cylindrically shaped. 
     Key  100  can be any key on any keyboard irrespective of keyboard illumination, keyboard function, such as standard size, laptop size, thumb-size or others, keyboard structure, whether foldable or non-foldable, keyboard layout, such as QWERTY, AZERTY or others, key function, such as an alphanumeric key, a function key, a bar key, a direction key, an enter key, a shift key, and any other computer keyboard key, device type, such as a calculator, whether handheld, portable, desktop, and/or pocket, a typewriter, a desktop computer, a computer mouse, whether wired and/or wireless, a workstation, a computer kiosk, a piano, an accordion, an organ, a mobile phone, a cash register, a point-of-sale system, an automobile, an appliance or others. Key  100  can be waterproof. 
     Body  102  has an upright trapezoidal cross-section. However, in other example embodiments, body  102  can have a non-upright trapezoidal cross-section, such as a flipped trapezoid or a sideways-turned trapezoid, or a non-trapezoidal cross-section, such as a square cross-section or a rectangular cross-section. Sidewalls  104  are outwardly beveled with respect to surface  108 . However, in other example embodiments, at least one of sidewalls  104  can be inwardly beveled with respect to surface  108  or can be perpendicular to surface  108 . Although surface  108  is concave i.e. curves inward to form a dimple, surface  108  can also be convex i.e. curve outward to form a hemispherical cap, whether hollow or non-hollow, or not project all, such as be rectilinearly flat. Surface  108  can be wavy, curvy, zigzag, teethed, linear and/or others. 
     Surface  108 , at least one of corners  106  and/or at least one of walls  104  can be coated and/or include an anti-bacterial and/or anti-mold coating. Surface  108  can also include at least one user identifiable symbol, such as an alphanumeric character, a string, a plurality of strings and/or others, irrespective of how the symbol is associated with surface  108 , such as a sticker, an ink/paint, or manufactured with the symbol thereon, such as via embedding. 
       FIG. 2  shows a cross-sectional view of an example embodiment of a computer keyboard key having an upper chamber and a lower chamber according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Body  102  contains an upper chamber  110  and a lower chamber  114 , both of which are enclosed by sidewalls  104  and are below surface  108 . A divider  113 , such as a floor, separates chamber  110  and chamber  114 . Divider  113  is rigid, but can be flexible. Divider  113  can be unitary with respect to at least one of sidewalls  104  and/or at least one of corners  106 . Divider  113  can be as long, wide and/or deep as at least one of chamber  110  and chamber  114 . However, in other example embodiments, divider  113  is different in length, width and/or depth, whether shorter or longer, than at least one of chamber  110  and chamber  114 . Divider  113  precludes fluid communication between chamber  110  and chamber  114 . 
     Chamber  110  is disposed over chamber  114 . Such disposal can be offset, non-aligned and/or off-center, such as chamber  110  and chamber  114  are offset with each other, non-aligned with each other and/or off-center with each other. However, in other example embodiments, such disposal can allow for chamber  110  and chamber  114  to be non-offset, share a common center and/or be aligned with each other. Chamber  110  and chamber  114  extend linearly within body  102 . However, in other example embodiments, chamber  110  and/or chamber  114  can extend non-linearly within body  102 , such as be sloped upwardly or downwardly, wavy, zigzag, curved and/or other ways. Chamber  110  and chamber  114  have rectangular cross-sections. However, in other example embodiments, chamber  110  and/or chamber  114  can have non-rectangular cross-sections, such as square, circular, oval, trapezoidal, pentagonal, octagonal and/or others. Chamber  110  and chamber  114  have linear sidewalls. However, in other example embodiments, chamber  110  and/or chamber  110  can have non-linear sidewalls, such as curved, wavy, zigzag and/or others. Chamber  110  can be identical in at least one of shape, size, length, width, depth, internal surface and volume to chamber  114 . However, in other example embodiments, chamber  110  is different in at least one of shape, size, length, width, depth, internal surface and volume from chamber  114 . Chamber  110  is fully enclosed, imperforate and isolated from ambient air and chamber  114 . Chamber  114  is fully enclosed, imperforate and isolated from ambient air and chamber  110 . 
     Chamber  110  contains a first gel  112 , such as silicon. Chamber  114  contains a second gel  116 , such as silicon. Gel  112  can be identical to gel  116 , whether in chemical constitution, functional properties, volume and/or others. However, in other example embodiments, gel  112  can be different from gel  116 , whether in chemical constitution, functional properties, volume and/or others. Chamber  110  can be fully filled with gel  112 . However, in other example embodiments, chamber  112  can be less than full i.e. partially filled with gel  112 , such as half or more or less than half. Chamber  114  can be fully filled with gel  116 . However, in other example embodiments, chamber  114  can be less than full i.e. partially filled with gel  116 , such as half or more or less than half. At least one of gel  112  and gel  116  can be a deformable cushion gel. Chamber  110  can contain gel  112  in identical amount as chamber  114  contains gel  116 . However, in other example embodiments, chamber  110  can contain gel  112  in different amount than chamber  114  contains gel  116 . At least one of gel  112  and gel  114  can be a mixture of gels. Rubber can be used instead of at least one of gel  112  and gel  116 . 
     The presence of at least chamber  110  containing gel  112  and chamber  114  containing gel  116  may contribute to key  100  being easier and/or softer to press, which may reduce and/or soften impact to a user suffering from CTS. Also, such key structure may reduce the likelihood of occurrence of CTS. Moreover, such key structure may improve shock absorbency when the user presses key  100 . Further, such key structure may bolster the strength of the divider between chamber  110  and chamber  114  when the user presses on key  100  many times since gel  116  can press upward when the pressure is applied to key  100  by the user pressing key  100 . Note that divider  113  is sufficiently strong/reinforced to preclude breaking/puncturing therethrough upon repeated pressing of key  100 . 
     Chamber  110  and chamber  114  can include sub-chambers sectioned off in any way, whether identical to each other with respect to the respective chamber or non-identical to each other with respect to the respective chamber, whether identical to each other with respect to the respective chambers or non-identical to each other with respect to the respective chambers. The sub-chambers can include a plurality of gels, identical to each other or different from each other in any way, whether in chemical constitution, functional properties, volume and/or others. The sub-chambers can be divided via at least one divider extending in at least one direction, such as vertical, diagonal and/or vertical. 
       FIG. 3A  shows a cross-sectional view of an example embodiment of a computer keyboard key having an upper chamber more voluminous than a lower chamber than according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that chamber  110  has a larger cross section than chamber  114 . Nevertheless, gel  112  and gel  116  can be equal in volume or non-equal in volume, such as gel  112  having more volume than gel  116  or gel  112  having less volume than gel  116 . 
       FIG. 3B  shows a cross-sectional view of an example embodiment of a computer keyboard key having an upper chamber less voluminous than a lower chamber than according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that chamber  110  has a smaller cross section than chamber  114 . Nevertheless, gel  112  and gel  116  can be equal in volume or non-equal in volume, such as gel  112  having more volume than gel  116  or gel  112  having less volume than gel  116 . 
       FIG. 4A  shows a cross-sectional view of an example embodiment of a computer keyboard key where cushion gels are identical to each other according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that gel  112  and gel  114  have an identical chemical constitution, whether in viscosity and/or chemical make-up. 
       FIG. 4B  shows a cross-sectional view of an example embodiment of a computer keyboard key where cushion gels are different from each other according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that gel  112  and gel  114  differ in chemical constitution, which can include different viscosities of an identical chemical make-up or a different chemical make-up irrespective of gel viscosity. 
       FIG. 5A  shows a side view of an example embodiment of a computer key having inclined sidewalls and a curved top surface according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that walls  104  are non-parallel and outwardly beveled. Surface  108  is concave i.e. curves inward to form a dimple. However, in other example embodiments, walls  104  can be inwardly beveled or be perpendicular, via being parallel to each other, to surface  108 , which can be linear or convex. 
       FIG. 5B  shows a side view of an example embodiment of a computer key having inclined sidewalls and a linear top surface according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that surface  108  is rectilinear. 
       FIG. 5C  a side view of an example embodiment of a computer key having non-inclined sidewalls and a linear top surface according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Note that walls  104  are rectilinear and parallel to each other. 
       FIG. 6  shows a perspective view of an example embodiment of a laptop computer having a key with at least two chambers according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     A laptop computer  200  includes a keyboard having a plurality of keys. At least one of the keys is key  100 . Any and/or all of the keys can be structured identically to or similar to key  100 . For example, some keys can have multiple gel filled chambers and other keys can have a pair of gel filled chambers and yet other keys can have differently sized gel filled chambers and still other keys can have a plurality of chambers containing different gels, whether different in volume or chemical make-up. 
       FIG. 7  shows a perspective view of an example embodiment of a wired computer keyboard having a key with at least two chambers according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     A wired keyboard  300  has a plurality of keys. At least one of the keys is key  100 . Any and/or all of the keys can be structured identically to or similar to key  100 . For example, some keys can have multiple gel filled chambers and other keys can have a pair of gel filled chambers and yet other keys can have differently sized gel filled chambers and still other keys can have a plurality of chambers containing different gels, whether different in volume or chemical make-up. 
       FIG. 8  shows a perspective view of an example embodiment of a wireless computer keyboard having a key with at least two chambers according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     A wireless keyboard  400  has a plurality of keys. At least one of the keys is key  100 . Any and/or all of the keys can be structured identically to or similar to key  100 . For example, some keys can have multiple gel filled chambers and other keys can have a pair of gel filled chambers and yet other keys can have differently sized gel filled chambers and still other keys can have a plurality of chambers containing different gels, whether different in volume or chemical make-up. 
       FIG. 9  shows a perspective view of an example embodiment of a musical keyboard having a key with at least two chambers according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     A musical instrument keyboard  500  has a plurality of keys, which includes at least one of a natural key and an accidental key. At least one of the keys is key  100 . Any and/or all of the keys can be structured identically to or similar to key  100 . For example, some keys can have multiple gel filled chambers and other keys can have a pair of gel filled chambers and yet other keys can have differently sized gel filled chambers and still other keys can have a plurality of chambers containing different gels, whether different in volume or chemical make-up. The musical instrument can be any instrument including a keyboard, such as a piano, an electronic piano, an organ, an accordion, a keytar and/or others. 
       FIG. 10  shows a cross-sectional view of an example embodiment of a computer keyboard key defining an open space below a lower chamber according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Body  102  contains an open space  117  defined via an interior surface  119 . Chamber  114  is interposed between chamber  110  and space  117 . Space  117  is sized to allow for body  102  to mount onto a key stem. Space  117  is cuboid, but can be shaped in another way, such as trapezoidal. Space  117  is volumetrically smaller than chamber  110  and chamber  114 . However, in other embodiments, space  117  is volumetrically larger than at least one of chamber  110  and chamber  114 . Surface  119  can include a plurality of grooves or mounds to assist in coupling of key  100  onto the stem. 
       FIG. 11  shows a cross-sectional view of an example embodiment of a computer keyboard key with at least three chambers according to the present disclosure. Some elements of this figure are described above. Thus, same and/or similar reference characters identify same and/or like components described above and any repetitive detailed description thereof will hereinafter be omitted or simplified in order to avoid complication. 
     Body  102  includes a third chamber  118 . Chamber  114  is interposed between chamber  110  and chamber  118 . Chamber  118  is volumetrically identical to chamber  110  and chamber  118 . However, in other embodiments, chamber  118  is different from at least one of chamber  110  and chamber  114  in at least one of size, content, volume, shape, and texture. Chamber  118  contains a third gel, which can be identical to and/or different from at least one of gel  112  and gel  116  in at least one of chemical composition, volume, weight, and texture. The third gel can include silicone. The third gel can be a deformable cushion gel. Note that other embodiments include more chambers, such as four, five or even ten gel filled chambers. 
     The description of the present disclosure has been presented for purposes of illustration and description, but is not intended to be fully exhaustive and/or limited to the disclosure in the form disclosed. Many modifications and variations in techniques and structures will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the disclosure as set forth in the claims that follow. Accordingly, such modifications and variations are contemplated as being a part of the present disclosure. The scope of the present disclosure is defined by the claims, which includes known equivalents and unforeseeable equivalents at the time of filing of this application.