Abstract:
A shock absorbing cushion device removable, pressure-adjustable for sports goods, comprising a cover and an air cushion enveloped in the cover, said cushion made as a hollow flat bag whose upper and lower sheets are provided and adhered with round rcesses or line recesses or the both combined, said recesses furnishing the air cushion with shock absorbing elasticity and flexibility whether said cushion is inflated or not. An inflation pump or an air nipple is provided in said cushion for inflating or deflating said cushion.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     This invention generally relates to shock-absorbers for sports equipment and, more particularly, to absorbers inflatable by a pump to an adjustable pressure.  
         [0003]     2. Description of Related Art  
         [0004]     Sports shoes are generally provided with tongues which are provided with a thin layer of sponge. The shock-absorbing function of the thin sponge layer is not ideal during use, because the user not only feels pressure against his foot, but also discomfort owing to the lace binding, the foot being full of blood vessels and sinews. When a foot stops during exercise, the shock forces against the shoe mainly fall on the tongue and the lace section in addition to the toe box. The thin sponge layer of the tongue cannot endure such shock forces against the foot.  
         [0005]     It would be desirable to make a shoe tongue that could endure such shock forces, could be provided with different shock-absorbing capabilities to cope with both walking and exercising, and could be comfortable without pressing the foot.  
         [0006]     There is a kind of hard skiing shoe provided with air-inflated shoe tongues, each made of two pieces stuck together and forming an empty pocket if the air should leak out owing to breakage or wear and tear. Once the tongues become flat, they can hardly be repaired. The entire skiing shoes have to be discarded. This is wasteful and uneconomical.  
       SUMMARY OF THE INVENTION  
       [0007]     The inventor, after practical study and experiments, has worked out a shock-absorbing cushion device for shoe tongues which can be removed, changed to a new one, and is adjustable in its internal pressure by use of an inflation pump. The device is able to be used in sports shoes, boots, knee protectors, and other sports goods.  
         [0008]     Objects of the Invention  
         [0009]     The objects of this invention are set forth below:  
         [0010]     1. To furnish a kind of shock-absorbing cushion device whose inflation pressure is adjustable as desired, thereby selecting the degree of elastic absorption.  
         [0011]     2. To furnish a kind of shock-absorbing cushion device that can maintain the original shock-absorbing space and function, without becoming flat even if the device was damaged or was not inflated.  
         [0012]     3. To furnish a kind of shock-absorbing cushion device that can be adjusted in its internal pressure such that the sports goods may have tight contact with a part of the body to be protected and the capability of absorbing shock.  
         [0013]     4. To furnish a kind of shock-absorbing cushion device that can be inflated or deflated according to different necessity while in use.  
         [0014]     5. To furnish a kind of shock-absorbing cushion device that is waterproof and does not separate.  
         [0015]     6. To furnish a kind of shock-absorbing cushion device that can absorb unbalanced shock forces, change them into a balanced shock force, and remove foot pressure and discomfort.  
         [0016]     7. To furnish a kind of shock-absorbing cushion device that can easily be fixed on or taken off a sports goods.  
         [0017]     8. To furnish a kind of shock-absorbing cushion device that can be used in a shoe tongue to prevent the shoe lace from becoming loose, tight, unbalanced or unstable.  
         [0018]     9. To furnish a kind of shock-absorbing cushion device that can be used in a shoe tongue to make feet comfortable by inflating said tongue to a proper pressure when a user puts on the shoes, and can enable the shoes to be taken off easily by deflating the air inside.  
         [0019]     Features of the Invention  
         [0020]     This shock-absorbing cushion device is removable and pressure-adjustable and is used in sports goods. The device comprises a cover and an air cushion enveloped in the cover. By means of blow shaping, the air cushion is shaped as a hollow bag made up of two sheets of polyethylene or an analogous material. The two sheets, an upper and a lower, are provided with vertical round recesses or vertical linear recesses extending crosswise or lengthwise of the cushion. The sheets are adhered together at the recesses. The recesses enable the air cushion to have shock-absorbing elasticity and flexibility. The recesses maintain the flatness of the outer surface of the cushion whether the air cushion is inflated or not, in order to cope with the bending movement of a part of a human body. The air cushion can be provided with an inflation pump or an air nipple for inflating or deflating the cushion.  
         [0021]     The air cushion combined together with the cover can be fixed on sports goods such as sports shoes, knee protectors, shoulder protectors, etc., by means of shoe laces, snap fasteners, sticker fasteners, etc.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0022]      FIG. 1  is a perspective view of the removable pressure-adjustable shoe tongue with an inflation pump in accordance with the present invention,  
         [0023]      FIG. 2  is a cross-sectional view of the inflation pump in the shoe tongue in accordance with the present invention,  
         [0024]      FIG. 3  is an operational view of the inflation pump and the air cushion inside the shoe tongue in accordance with the present invention,  
         [0025]      FIG. 4  is an operational view of the inflation pump under deflating action in accordance with the present invention,  
         [0026]      FIG. 5  is a cross-sectional view of the air nipple set on the shoe tongue in accordance with the present invention,  
         [0027]      FIG. 6  is a top plan view of an embodiment of an air cushion inside the shoe tongue in accordance with the present invention,  
         [0028]      FIG. 6-1  is a cross-sectional view taken on line  6 - 1 -- 6 - 1  of  FIG. 6 ,  
         [0029]      FIG. 6-2  is a cross-sectional view taken on line  6 - 2 -- 6 - 2  of  FIG. 6 ,  
         [0030]      FIG. 7  is a top plan view of another embodiment of an air cushion inside the shoe tongue used for boots in accordance with the present invention,  
         [0031]      FIG. 7-1  is a cross-sectional view taken on line  7 - 1 -- 7 - 1  of  FIG. 7 ,  
         [0032]      FIG. 7-2  is a cross-sectional view taken on line  7 - 2 -- 7 - 2  of  FIG. 7 ,  
         [0033]      FIG. 8  is a top plan view of still another embodiment of an air cushion in the shoe tongue in accordance with the present invention,  
         [0034]      FIG. 8-1  is a cross-sectional view taken on line  8 - 1 -- 8 - 1  of  FIG. 8 ,  
         [0035]      FIG. 8-2  is a cross-sectional view taken on line  8 - 2 -- 8 - 2  of  FIG. 8 ,  
         [0036]      FIG. 9  is a top plan view of an additional embodiment of an air cushion in the shoe tongue used in boots in accordance with the present invention,  
         [0037]      FIG. 9-1  is a cross-sectional view taken on line  9 - 1 -- 9 - 1  of  FIG. 9 ,  
         [0038]      FIG. 9-2  is a cross-sectional view taken on line  9 - 2 -- 9 - 2  of  FIG. 9 ,  
         [0039]      FIG. 10  is a top plan view of still another embodiment of an air cushion in the shoe tongue in accordance with the present invention,  
         [0040]      FIG. 10-1  is a cross-sectional view taken on line  10 - 1 -- 10 - 1  of  FIG. 10 ,  
         [0041]      FIG. 11  is a top plan view of another embodiment of an air cushion in the shoe tongue used for boots in accordance with the present invention,  
         [0042]      FIG. 11-1  is a cross-sectional view taken on line  11 - 1 -- 11 - 1  of  FIG. 11 ,  
         [0043]      FIG. 12  is a top plan view of another embodiment of an air cushion in the shoe tongue in accordance with the present invention,  
         [0044]      FIG. 12-1  is a cross-sectional view taken on line  12 - 1 -- 12 - 1  of  FIG. 12 ,  
         [0045]      FIG. 13  is a top plan view of another embodiment of an air cushion in the shoe tongue used for boots in accordance with the present invention,  
         [0046]      FIG. 13-1  is a cross-sectional view taken on line  13 - 1 -- 13 - 1 -of  FIG. 13 ,  
         [0047]      FIG. 14  is a top plan view of another embodiment of an air cushion inside the shoe tongue in accordance with the present invention,  
         [0048]      FIG. 14-1  is a cross-sectional view taken on line  14 - 1 -- 14 - 1  of  FIG. 14 ,  
         [0049]      FIG. 15  is a top plan view of another embodiment of an air cushion inside the shoe tongue in accordance with the present invention,  
         [0050]      FIG. 15-1  is a cross-sectional view taken on line  15 - 1 -- 15 - 1  of  FIG. 15 ,  
         [0051]      FIG. 16  is a top plan view of another embodiment of an air cushion inside the shoe tongue in accordance with the present invention,  
         [0052]      FIG. 16-1  is a cross-sectional view taken on line  16 - 1 -- 16 - 1  of  FIG. 16 ,  
         [0053]      FIG. 17  is an enlarged cross-sectional view of an air cushion combined with an air nipple in accordance with the present invention,  
         [0054]      FIG. 18  is a perspective view of a shoe counter with the shock absorbing cushion device shown in a shoe illustrated in phantom lines in accordance with the present invention,  
         [0055]      FIG. 19  is a perspective view of a knee protector with this shock absorbing cushion device in accordance with the present invention,  
         [0056]      FIG. 20  is a top plan view of another embodiment of a shoe counter with the shock absorbing cushion device in accordance with the present invention, and  
         [0057]      FIG. 21  is a top plan view of another embodiment of a shoe counter with the shock absorbing cushion device in accordance with the present invention.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0058]     The removable, pressure-adjustable, shock-absorbing cushion device in accordance with the present invention, as applied to a shoe tongue, is shown in  FIG. 1 . The shoe tongue comprises a cover  1  and an air cushion  2 . The cover  1  is made of cloth, leather or any other fiber, and contains and keeps the air cushion  2  inside the cover. The cover is provided with several eyelets  11  at its front for a shoe lace to penetrate and a hole  12  at its rear edge. An inflation pump  21  or an air nipple  23  extends through the hole  12 . A bag  13  envelopes the inflation pump  21  when the pump is not in use. The cover  1  can be combined with the shoe by means of the eyelets  11  or analogous fasteners such as a zipper, snap fasteners, sticker fasteners, or buttons, etc.  
         [0059]     The air cushion  2  can be made of polyethylene, ethylene, or any other material with excellent elasticity, flexibility, extensibility and durability against low temperature, and that is easy to shape by blowing techniques. The air cushion  2  is provided with a plurality of round recesses or linear recesses on its upper and lower sheets. The bottoms of the recesses  201  (see  FIG. 6 ) on both sheets are adhered together so that the vertical cross-section of each recess has a square shape. The arrangement of round and linear recesses can be changed in many ways but they have to be located so as to balance in the lengthwise and crosswise directions. The vertical sustaining force and the elasticity that both vertical side walls of round recesses or linear recesses produce make up effectively the sustaining force of the whole hollow air cushion. This shock-absorbing cushion device design provides an excellent outer surface flatness and a strong interactive sustaining function and prevents possible deformation due to high pressure. Of importance is that the air cushion  2  itself can never be totally flattened because of the vertical square cross-section of the round or linear recesses even if the cushion is damaged or not yet inflated.  
         [0060]     As shown in  FIGS. 2, 3  and  4 , the rear end of the inflation pump  21  is fixed steadfast with the air cushion as one unit. The pump  21  is an elastic tube that can be expanded or contracted to draw in air through a one-way valve  215  set in a valve base  212  at the front. Another one-way valve  213  set in a valve base  211  at the rear cooperates with the valve  215  to draw in the air. Sponges  214 ,  216  surround the valves  213 ,  215 , giving them auxiliary force for stabilizing the position of said valves  213 ,  215  when they return to their original positions. The sponges also filter the air drawn in. In addition, a bar  217  extends backward from the valve  215 , penetrates through the sponge  216  and reaches to the middle of the elastic tube of the pump  21 . The bar  217  does not touch the rear of the valve  213  in the original position, but can be pushed back by the valve  215  to push the valve  213  if a little bar  24  is inserted into the front of the inflation pump  21  pushing back the valve  215 , whereupon both valves  213 ,  215  are opened to release the air inside the air cushion  2 .  
         [0061]     The inflation pump  21  can be replaced by an air nipple  23  made of rubber. A needle is inserted into the nipple to inflate or deflate the air cushion  2 . The air nipple  23  has several outward protrusions  230  at its end which is set in a round tube  202 . The protrusions prevent the nipple from falling off said tube  202 . The tube  202  is tightly bound around by several rubber bands  231  to prevent the air nipple from falling off at the same time. The main function of the rubber bands is to prevent the air cushion  2  from exploding open if the cushion  2  should receive a shock force larger than it can endure. Such a shock force greater than the binding force of the rubber bands would produce a gap between the air nipple  23  and the tube  202 , thereby causing the air inside the cushion  2  to escape through the gap. As  FIG. 17  shows, the outer circumference of the tube  202  can be shaped as a thread and the cross-section of the thread may be triangular, square, semicircular, oblong or any shape, provided that the air nipple  23 , after set in the tube  202 , can strongly resist the escape of air.  
         [0062]     Next, examples of air cushions provided with round recesses  20  (see  FIG. 12 ) and linear recesses  201 , either separately or in combination, are described with reference to the Figures.  
         [0063]     FIGS.  6 ,  6 - 1 ,  6 - 2  show a kind of air cushion  2  provided with lengthwise linear recesses  201 , but one end of every linear recess  201  is not connected with a circumferential edge of the cushion so that air can circulate through a passage formed between the circumferential edge and the ends of the linear recesses  201 . The upper and lower sheets of the cushion  2  have a flat surface and the cross-section of the air space inside the cushion  2  is shaped as a square. The cushion is inclined at its peripheral edges according to the inclined upper surface of the foot.  
         [0064]     FIGS.  7 ,  7 - 1 ,  7 - 2  show an example of an air cushion used for a boot with a little change added to the example shown in  FIG. 6 . This cushion is provided with a square flat section  203 . Between the inside ends of the linear recesses  201  on both sides of said section  203  is separately set a passage for the air inside to pass through. The outside ends of said recesses  201  are either connected or not connected with a respective circumferential edge. The embodiment of  FIG. 7  is provided with an air nipple  23 .  
         [0065]     FIGS.  8 ,  8 - 1 ,  8 - 2  show an example of an air cushion  2  with crosswise linear recesses  201  connected with a circumferential edge of the cushion at both ends, thereby dividing the inside space into a plurality of crosswise independent rooms. Short tubes  204  of smaller diameter than the height of the air cushion are set across the recesses  201  for the air in each independent room to pass through. Therefore, this cushion can acquire good crosswise flexibility owing to the crosswise recesses  201 . The comparatively small tubes  204  never hamper the cushion from bending. The tubes  201  are not easily broken. The vertical cross-section of the linear recesses resembles a square.  
         [0066]     FIGS.  9 ,  9 - 1 ,  9 - 2  show an example of an air cushion used for a boot with the crosswise linear recesses  201  of  FIG. 8  changed a little. Both ends of the linear recesses  201  do not connect with the circumferential edges such that passages are formed between the ends of said recesses  201  and said edges. This cushion  2  can be bent crosswise and can be provided with an air nipple  23  or an inflation pump  21 .  
         [0067]     FIGS.  10 ,  10 - 1  show an example of air cushion  2  with crosswise and lengthwise linear recesses  201  combined at the same time. The ends of the crosswise or lengthwise linear recesses  201  are not connected with any circumferential edge. The crosswise linear recesses  201  do not meet the lengthwise linear recesses  201  so that passages  22  are formed around the circumferential edge. The cross-section of the inside of the cushion still is sguare-shaped, in spite of the crosswise and lengthwise linear recesses  201 . An air nipple  23  or an inflation pump  21  can be provided with this cushion. This cushion is provided with extending-out wings  205  to make it broader to cover the foot.  
         [0068]     FIGS.  11 ,  11 - 1  show an example of an air cushion used for boots quite similar to the example shown in  FIG. 10 .  
         [0069]     FIGS.  12 ,  12 - 1  show an example of an air cushion  2  provided with many round recesses  20  and a few crosswise linear recesses  201  and an air nipple  23 . The round recesses  20  and the linear recesses  201  have the illustrated cross-section. This cushion has its inside hollow spaces in mutual communication, except for the places where the round recesses  20  and the linear recesses  201  are located. This kind of cushion can also be made with a little wider front part to cover the eyelets  11  of the cover  1  in order to widely cover the foot.  
         [0070]     FIGS.  13 ,  13 - 1  show an example of an air cushion provided with a combination of round recesses  20  and crosswise and lengthwise linear recesses  201 . Both ends of the lengthwise linear recesses  201  do not connect with any circumferential edge for forming passages  22 . However, the crosswise linear recesses  201  are connected with both circumferential edges and are provided with short tubes  204  set across them as shown in  FIG. 8  for the air inside to pass through in order that this cushion may have a crosswise bending capability to cope with the inclined upper face of the foot. Either an air nipple  23  or an inflation pump  21  can be provided in this cushion  2 .  
         [0071]     FIGS.  14 ,  14 - 1  show an example of an air cushion  3 , wherein a continuous, bent middle sheet  31  adheres to the upper and the lower sheets intermittently at spaced locations. The middle sheet  31  has a narrower width than that of the air cushion  3  such that passages  22  are formed by means of the difference of their widths. This kind of air cushion can have flatter surfaces than the others.  
         [0072]     FIGS.  15 ,  15 - 1  show an example of an air cushion quite similar to the example of  FIG. 14 . The difference between them consists in the shape of the middle sheet  31  set between the upper and the lower sheets. This middle sheet  31  has a continuously bent slope and also is adhered to the upper and the lower sheets intermittently at spaced locations. This cushion can also have flatter surfaces than the others.  
         [0073]     The air cushion used in a shoe tongue can also be made by means of heat sealing as shown in FIGS.  16 ,  16 - 1 . A layer of foam material has to be added on the surface of this cushion to make it flat as this cushion made through heat sealing can have a rather rough surface.  
         [0074]      FIGS. 18, 20 ,  21  show a shoe counter cushion  5  provided with this shock-absorbing cushion device for a sports shoe. The counter cushion  5  comprises crosswise linear recesses  201  adhering the upper sheet to the lower sheet. The hollow width of said linear recesses  201  allows the cushion  5  to conform to the vertical face of the heel to absorb shock. An inflation pump  21  or an air nipple  23  can be used in this device.  
         [0075]      FIG. 19  shows a kind of knee protector which comprises an air cushion  6  in accordance with the present invention. The cushion  6  is provided with crosswise linear recesses  201  on the upper and the lower sheets. The height of the recesses  201  serves as bending space for the knee, ensuring the function of protecting the knee from being hurt but not hampering the movement of the knee. This cushion  6  can be provided with an inflation pump  21  or an air nipple  23 .  
         [0076]     Of course, this shock-absorbing structure can not only be applied to a shoe tongue, a counter cushion for sports shoes and a knee protector as described above, but also to a shoulder protector, or any other sports goods.  
         [0077]     After an air cushion  2  is sealed in a cover  1 , both of them make up a shock-absorbing structure removable, pressure-adjustable and ready to be used in sports shoes.  
         [0078]     To inflate air into the air cushion  2 , the inflation pump  21  is expanded or pulled lengthwise as shown in  FIG. 3 . As the pump  21  is pulled long and extended, a vacuum condition is produced inside the pump  21 , thereby sucking air into the open one-way valve  215  at the front of the pump  21 . When the pump  21  is pushed short and retracted instead of expanded, the air drawn inside is compressed to close the valve  215  and to push open the one-way valve  213  at the same time so that the air is pushed and flows into the air cushion  2 . Repeating these actions to expand and to contract the pump  21  inflates the cushion  2  to the extent desired.  
         [0079]     On the contrary, to deflate or decrease the inside pressure of the air cushion  2 , the valve  215  should be pushed open backward to make the bar  217  push the valve  213  open so that the air inside the cushion can be expelled out to the extent desired as shown in  FIG. 4 .  
         [0080]     In general, this shock-absorbing cushion device in accordance with the present invention not only has a special practical usefulness, but also is effective in preventing injuries during exercise or playing a sport. In addition, its special features are removability, adjustability in its pressure and the excellent elasticity against shock even if it is not inflated.  
         [0081]     The interior of the air cushion can be filled with air, foamed polyurethane, water, oil, or any fluid of low percolation.