Patent Document

FIELD OF THE INVENTION 
       [0001]    This invention relates to footwear having a sole insert designed to provide the same massaging affect as flowing particulate sand underneath bare feet on the beach. 
       BACKGROUND OF THE INVENTION 
       [0002]    The present invention relates to all types of footwear, but especially to slippers which are provided with an inner sole for massaging the underside of the foot. It generally provides the wearer with continuous stimulation of the soles of the feet and has a beneficial affect on the leg and foot muscles of the wearer, particularly as it relates to enhancement of circulation in the lower extremities. 
         [0003]    Footwear sole inserts are of course known. See for example, U.S. Pat. Nos. 2,400,023 to Potter, 3,922,801 to Zente, 3,987,559 to Roberts, 4,567,677 to Zona, 5,930,916 to Connor, and finally 6,532,689 to Jones. All of these in one fashion or another relate to footwear with either a sole or sole insert that provides some sort of treatment affect to the bottom of the foot. However, none of these patents disclose a sole insert which stimulates the bottom of the foot in similar fashion to walking in particulate, flowable sand particles on a beach. The latter affect is not easy to achieve with a sole insert since the flow of the particulate particles under influence of the body weight will typically move out from under the weight of the body to the sides, leaving insert a particulate particle distribution that fails in its desired affect. 
         [0004]    The result of the above described movement is that the sole insert loses its affect entirely, rendering the footwear useless for its intended purpose. To have an adequate sole insert which does allow correct flow of the particles involves both a combination of selection of the correct particles (not too heavy, such as sand) and the selection of sole inserts which have the correct configuration to prevent undesirable flow characteristics, i.e., smashing of particles to the side. 
         [0005]    It is an object of the present invention to provide footwear of a relaxed, refreshed and massaged foot feeling, as when twisting the feet into a dry sand beach. 
         [0006]    A further object of the present invention is to provide footwear that mimics the experience of rubbing your feet into dry particulate sand. 
         [0007]    A further objective of the present invention is to provide footwear sole inserts having the proper particulate distribution and configuration to give the exhilarated bare foot in the sand feeling and massage affect. 
         [0008]    A further objective of the present invention is to provide the above enumerated objectives in an economically feasible manner affordable for various types of footwear. 
         [0009]    The method and details necessary to achieve the above objectives will become apparent from the following detailed description of the invention. 
       SUMMARY OF THE INVENTION 
       [0010]    A footwear article that has an insert pad filled with loose particulate material which is configured within the pad to provide the feeling of walking on a sandy beach and with the same massage affect to the foot as walking on a sandy beach. The pad is particularly configured to prevent the loose particulate material inside of it from flowing to the sides of the pad and destroying the massaging affect. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]      FIG. 1  is a perspective view of exemplary footwear of the present invention. 
           [0012]      FIG. 2  is a bottom view of exemplary footwear of the present invention. 
           [0013]      FIG. 3  is a back view of exemplary footwear of the present invention. 
           [0014]      FIG. 4  is a sectional view of the footwear product of  FIG. 1  along line  4 - 4 . 
           [0015]      FIG. 5  is a perspective view of one of the inserts of the present invention. 
           [0016]      FIG. 6  is a side view of one of the inserts of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0017]    As heretofore mentioned, the footwear of the present invention can be adapted for a variety of different kinds of footwear and can include, for example, slippers, sandals, shoes, stockings and boots. For convenience and for exemplary purposes only in the present drawings there is shown a slipper. Referring to  FIG. 1 , it shows a perspective view of the slipper  10  of the present invention. A slipper, as does any other type of footwear, has a sole preferably made of a more durable material than the upper configuration. The sole  12  has an upper portion  14 , commonly referred to as the shoe upper, which in the case of a shoe is made of a soft pliable material, as leather. In the case of a slipper, it may be made of a cloth-like material, such as nylon, etc. Upper portion  14  attaches to the sole  12  in conventional sewn manner and the upper above the heel area defines an opening  16  through which the wearer&#39;s foot is inserted to provide a tight fit around the user&#39;s ankle or leg. The sole  12  has a forward or toe extending portion  18  and an under heel portion  20 . 
         [0018]    An insert pad (see  FIG. 5 ) has similar configuration to the sole  12  as seen in  FIG. 2 . The insert pad  22  is a woven cloth material and may be adhered to the sole  12  or may be a removable insert pad  22 , which in most cases is preferred. The insert pad  22  is best illustrated in  FIG. 5 . There shown, it conforms generally to the same configuration as the sole  12  (see  FIGS. 2 and 5 ). The insert pad  22  has a plurality of generally parallel elongated channels or pockets  24 ,  26 ,  28  and  30 . These are all illustrated in sectional view in  FIG. 4  and in perspective view in  FIG. 5 . The channels are made by having sewn compartments or pockets as illustrated in  FIG. 2 . At the end just prior to the terminus of the toe portion  32  and the rearward heel portion  34 , the channel communicates so that particles can communicate from one elongated channel or pocket compartment area to another via an exit from one and entrance to another at  32 ,  34 . As hereinafter explained, this configuration as illustrated in  FIGS. 4 and 5  particularly is extremely important to the adequate performance of the insert pad  22 . Equally important to the adequate performance of the insert pad  22  is the nature of the flowable particulate material that this within insert pad  22  particles  36  are illustrated in the cross-sectional view of  FIG. 4 . 
         [0019]    Returning to  FIG. 44 , deformable insert pad  22  is formed as described with reference to  FIG. 5 . This deformable insert pad  22  accommodates a plurality of ergonomically favorable positions. Deformable insert pad  22  is resiliently deformable. 
         [0020]    Deformable insert pad  22  is filled with a granular filling material  36  that may be a plurality of small, tightly packed pellets or beads, hereinafter referred to collectively as beads. Beads  36  are shown in the cut-away portion of  FIG. 4  that shows filling material  36 . Beads  36  may be oval, elliptical, round, disc or egg-shaped, without sharp or rough edges and with a completely smooth exterior. The exemplary beads  36  or other filling material  36  is tightly packed in a corresponding pocket  24 ,  26 ,  28  and  30  that forms deformable insert pad  22 , to a sufficiently high density so that deformable insert pad  22  is moldable as the beads smoothly redistribute responsive to the underlying structure and the position of the wearer&#39;s foot. The packing and configuration may be so as to provide a resiliency to deformable insert pad  22 . 
         [0021]    Filling material  36  may be tightly packed within the pocket to provide complete and smooth moldability. Filling material  36  may be advantageously formed of thermal storage material capable of maintaining a reduced temperature for an extended period of time. By reduced temperature, it is meant that the temperature of the thermal storage material is lower than that of the ambient environment. The reduced temperature may be a temperature at or below 32° F., a temperature at or below 40° F., or any temperature that is less than room temperature. In one exemplary embodiment, ergoBeads™ may be used as filler material  36 . Since filling material  36  is advantageously formed of a population of small beads  36  with tiny air pockets between the beads, it provides a more comfortable soothing cool than the freezing cold sensation such as provided by ice or gel. As opposed to ice which has a temperature of 32° F. or lower, filling material  36  may be maintained at reduced temperatures greater than 32° F. The beads  36  may also be warmed, if desired. Deformable insert pad  22  has a smooth conformal nature that is more comfortable than the lumpy surface of an ice bag which includes sharp or hard edges that may provide pressure points of extreme cold. According to the embodiment in which filling material  36  is a thermal storage material, the thermal storage material may additionally or alternatively be chosen to retain heat and provide soothing warmth. Various thermal storage materials may be used. 
         [0022]    Exemplary beads  36  of filling material  36  have smooth exterior surfaces. In an exemplary embodiment, beads  36  may be formed of low density polyethylene (“LDPE”) and may be natural or semi-clear white in color. They may be injection molded or extrusion type LDPE particles. Beads  36  are free of sharp edges and include a surface that has an average surface roughness of less than 100 nanometers in one exemplary embodiment enabling the beads to slide easily and freely against each other. The beads&#39; surface may advantageously be polished to enhance smoothness. A coating may optionally be added to filling material  36 , in particular coating the surfaces of beads  36 . The coating may be a powdery coating formed of a mold-release agent such as an amide, or other materials that provide lubrication. Beads  36  maintain their surface smoothness and the easy deformability of deformable insert pad  22  is retained at a range of suppressed temperatures below 32° F. and on the other end above room temperature. 
         [0023]    Exemplary illustrated disc shaped beads  36  may include a pair of opposed round or oval surfaces and a length chosen to be less than or equal to 4.5 millimeters in one exemplary embodiment. Beads  36  may include dimensions of 3 millimeters×4.5 millimeters×2 millimeters and a density of 0.910 to 0.935 grams per cubic centimeter but other sizes and densities may be used in other exemplary embodiments, however. In another exemplary embodiment, beads  36  may include dimensions of about 6 millimeters×4 millimeters×3 millimeters. The exemplary dimensions provided are illustrative but not restrictive of the bead dimensions as other dimensions may be used in other exemplary embodiments. The beads may optionally include at least one dimple. Filler material  36  is packed tightly enough so that deformable insert pad  22  is deformable or moldable as the beads redistribute responsive to contact surfaces and positioning by the wearer. When deformable insert pad  22  is in contact with a wearer, a gentle massaging action is created by filling material  36  when pressure such as a gentle rolling action is applied to the opposed side of deformable insert pad  22 . 
         [0024]    Important to accomplishing the objectives of the present invention is not only the use of the proper particulate flowable material which may be subjected to either heat or cold and which is not too heavy (like sand is). Equally important, however, is to have the correct insert pad  22 . The pad must have a plurality of elongated channels or pockets  24 ,  26 ,  28  and  30  to function to prevent the beads  36  from all being squeezed out from underneath the foot towards the sides, eliminating completely the sand feel. The particular configuration for the elongated pocket channels  24 ,  26 ,  28  and  30  is such that at the forward end they all communicate under the toe area  32  and similarly they all communicate at the rearward end under the heel at  34 . This enhances the opportunity for the massaged, squishy feeling that occurs naturally in the sand. The sewn channels prevent pushing out from under the feet. 
         [0025]    Through the use of the insert pads  22 , the user can decide what amount of comfort or massage affect is desired and then can use the pads as long as he or she wishes, since inserts are easy to insert into, for example, a slipper. 
         [0026]    Although the invention has been described in terms of exemplary embodiments, it is not limited thereto. Rather the appended claims should be construed broadly to include other variance and embodiments of the invention, which may be made by those skilled in the art without departing from the scope and range of equivalence of the present invention.

Technology Category: 1