Abstract:
A weight lifting system wherein shoes of substantially normal fit and construction have additional parts that are designed to attach to and detach from corresponding hardware on weights and weight holding devices, and the additional parts on the shoes will not interfere with walking or other exercises or with the normal function of the shoe. Structural support for the added parts is embedded in the sole of the shoe where it will be unnoticeable by the user. The hardware works quickly and easily and a plurality of different weights is preferred with the net result being that the user can quickly and easily pick up and put down weights with their feet, change the amount of weight, and change weights from foot to foot and, hence, can easily move from one exercise to another, and there is no need to remove the shoes when performing other exercises.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of Provisional Application for Patent No. 61/191,171 filed on Sep. 4, 2008 for “Weight lifting shoes and their weights” from Thomas Jay Zeek. 
         [0002]    The sandals and weights shown in this application are not claimed per se in this application and will be claimed in a later application. 
     
    
     FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
       [0003]    Not Applicable. 
       SEQUENCE LISTING OR PROGRAM 
       [0004]    Not Applicable. 
       BACKGROUND OF THE INVENTION 
       [0005]    This invention pertains to weight lifting, specifically to a device that improves the quality and number of exercises that a person can do with their legs. It is a pair of shoes that enable the user to easily pick up and put down weights with their feet and to change weights quickly and they do not interfere with the user&#39;s ability to walk or to do other exercises. 
         [0006]    While exercises for the upper body have always been easy to do and plentiful, exercises for the legs have been fewer and much more difficult to coordinate. One of the reasons for this discrepancy is the simple ability of a person to pick up and put down weights with their hands, while no such ability exists for leg exercises. 
         [0007]    This problem is normally addressed by the use of large expensive weight lifting machines. Machines called leg curl and leg extension machines take up a lot of room in the user&#39;s house and are only good for a couple of exercises. Other weight lifting machines such as donkey kick machines are more expensive and for most people require a gym membership. 
         [0008]    Many devices have been invented for attaching weights to the user&#39;s ankles or feet to increase the number of exercises that can be done. Weighted shoes have been invented which don&#39;t hurt the ankles like ankle weights do but they make changing and removing weights difficult, and they hamper walking and other exercises because they remain heavy. U.S. Pat. Nos. 3,517,928 to Shanahan; 3,785,646 to Ruskin; and 6,052,924 to Sabat are examples of such shoes. Methods of adding weights to normal shoes include weights that tie into shoelaces U.S. Pat. No. 5,632,709 to Walsh and a sort of sock that fits over the shoe U.S. Pat. No. 5,728,032 to Glass. In both of those inventions changing weights is time consuming and difficult. All of these inventions are hampered by the limited amount of weight they can employ. 
         [0009]    Closer to the mark have been devices that attach to shoes and which in turn receive various amounts of weight. U.S. Pat. Nos. 2,114,790 to Venables; 2,849,237 to Simithis; 3,343,836 to James; and 6,196,950 to Emick are all examples of such devices. All of these devices are excellent while the user is actually doing the exercise. They all accommodate heavy weight and in one case the ease of changing weights rivals my own invention, but all have the same drawbacks, namely that they interfere with walking and doing other exercises. 
         [0010]    U.S. Pat. Nos. 2,114,790 and 3,343,836 mentioned above both use a very thick sole plate through which a dumbbell passes to add weight. The thickness of the sole plates makes walking awkward and makes other exercises awkward and dangerous as the user could easily “fall off their heels.” They would have to be removed when the user is switching between upper body and lower body exercises. U.S. Pat. No. 2,849,237 uses a thick sole plate as the actual weight and carries with it the same problems as above. U.S. Pat. No. 6,196,950 uses a thin sole plate but changing weights requires the user to fumble with individual weight plates instead of trading out the entire weight or weight holding device. The sole plate is very rigid and flat and not at all conducive to walking. 
         [0011]    U.S. Pat. No. 5,267,927 to Catanzano describes a similar device in which the sole plate is made up of a plurality of weights which can be thin but it is rigid and still awkward and is limited in the amount of weight it can incorporate. U.S. Pat. No. 2,214,052 to Good refers to an exercising boot “preferably made by casting suitable metal in a shaping form or mold.” It is intended to be worn in place of shoes and not over shoes and therefore will be difficult to fit properly. Its rigid design again makes walking and other exercises difficult and dangerous. 
         [0012]    The only invention heretofore that is suitable for heavy weights, allows quick and easy changing of weights, and considers the user&#39;s ability to walk and to perform other exercises as well as the user&#39;s safety is U.S. Pat. No. 757,983 to Vaile, which discloses a shoe of substantially normal fit and construction with some parts added to accommodate the addition and quick removal of weights, even heavy weights, just like the shoes of my own invention. The mostly normal construction of Vaile&#39;s shoe provides comfort, safety, and convenience because it can be worn throughout the user&#39;s workout and walking and performing other exercises is still possible, and it provides a solid dependable base for a person who is standing on one foot while exercising with the other foot. 
         [0013]    Vaile&#39;s shoe however still carries with it some drawbacks that need to be addressed. 
         [0014]    The first drawback of Vaile&#39;s invention is that the structural support for the parts that attach to weights comes in the form of a steel toe section in the front of the shoe. This steel toe completely eliminates all flexibility in the shoe from the ball of the foot forward, which interferes with the ability of the user to bend his or her toes back as would be necessary to for instance run on a treadmill or perform any other exercise that involves standing on the toes of either foot. 
         [0015]    A worse drawback of Vaile&#39;s steel toe design is that it prevents the user from pushing their toes down, which may be necessary to keep from falling over forward when the user is lifting heavy weights with their upper body, or doing squats with a barbell on their shoulders. 
         [0016]    Vaile&#39;s design also has the drawback of having the weight over the toes of the user&#39;s foot. This weight forward design forces the user to exercise their ankle and lower leg muscles and upper leg muscles at the same time. During lateral leg raises for instance the weight will put a twisting force on the user&#39;s ankle. Being forced to exercise too many muscles at the same time reduces the effectiveness on the target muscles because the user will get tired before the target muscles have been fully worked. 
         [0017]    Consequently there remains a need for, and it is the object of the current invention to provide a means for a person to quickly and easily pick up and put down heavy weights with their feet that is supremely safe, that does not hurt, does not hamper walking or other exercises, and that allows the user to switch back and forth unimpeded between upper and lower body exercises. 
       BRIEF SUMMARY OF THE INVENTION 
       [0018]    The current invention is a shoe that is normal in every way except for the addition of a small amount of hardware added for the purpose of attaching to weights, and a small amount of structural support for that hardware embedded in the sole of the shoe where it would be unnoticeable to the user, and weights and weight holding devices with hardware for attaching to the hardware of the shoes. A sturdy heel cup for the shoe is desirable. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING 
         [0019]      FIGS. 1A , B, C, and D show a top, side, front, and perspective view of the current invention. 
           [0020]      FIG. 2  shows a weight holding device for use with this invention including threaded posts  64  and wing nuts  66  for attaching to the shoes and a platform  60  to hold the shoes in place and a bar  62  for holding weights. 
           [0021]      FIG. 3  shows the weight holding device of  FIG. 2  with ordinary barbell weights  68  added. 
           [0022]      FIG. 4  shows a top view of a weight holding device for use with this invention using locking clamps  94  instead of wing nuts  66 . The locking nut  86  is not shown in this view. 
           [0023]      FIG. 5  shows a side view of the weight holding device for use with this invention with the locking clamps  94  open. 
           [0024]      FIG. 6  shows a side view of the weight holding device for use with this invention with the locking clamps  94  in a closed position. 
           [0025]      FIG. 7  shows a cross sectional view of the threaded rod  84  and plunger  82  of the locking clamp  94  and the hole  96  that the smooth post  90  goes into. 
           [0026]      FIGS. 8A  and B show views of the invention being worn by a user with the weight holding device attached. 
           [0027]      FIGS. 9A , B, and C show a person doing various exercises using the shoes and the weight holding device that I invented. 
           [0028]      FIG. 10  shows a perspective view of a weight with hardware for attaching to the shoes of this invention and a curved bottom  102  to facilitate walking. 
           [0029]      FIGS. 11A  and B show two views of this invention using pegs  110  instead of tabs  6 . The spacers  111  maintain a constant width to fit between the hardware in  FIG. 12  even across various shoe sizes. 
           [0030]      FIG. 12  shows an end view of a weight holding device with hardware to attach to the pegs  110  shown in  FIGS. 11A  and B. 
           [0031]      FIGS. 13A , B, and C show various views of an assembly which is to be embedded in the sole of a shoe including the hardware for attaching to weights and the structural support for that hardware. 
           [0032]      FIG. 14  shows the same assembly as  13 A-C for a smaller shoe size. 
           [0033]      FIGS. 15A  and B are a top and side view of a different embodiment of the assembly shown in  FIGS. 13A-C . 
           [0034]      FIGS. 16A  and B are a top and side view of a sturdy heel cup for the shoe. 
           [0035]      FIG. 17  is a top view of the shoe with abbreviated tabs  32  for latching onto the corresponding hardware on weights, and the sturdy heel cup  5  glued onto the outside of the shoe. 
           [0036]      FIG. 18  is a side view of the shoe with full tabs  6  and the heel cup  5  glued onto the shoe. 
           [0037]      FIGS. 19A  and B show an alternate use for the tabs  6  and the tab assembly  116  shown in  FIGS. 15A  and B wherein the tab assembly  116  is an integral part of a thin and flexible sandal which is to be strapped to the shod foot of the user. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0038]    A preferred embodiment of the shoe of the present invention is illustrated in  FIGS. 1A  (top view),  1 B (side view),  1 C (front view), and  1 D (perspective view). 
         [0039]    The shoe  40   a  is substantially normal in every way but further consists of a sturdy heel cup  5  hidden in the heel of the shoe to help to keep the shoe  40   a  on the user&#39;s foot and a means of tightening the heel cup  5  comfortably around the user&#39;s heel, in this case the shoe lace  44 .  FIG. 18  shows how the shoelace  44  tightens the heel cup  5 . A separate means for making the shoe fit the user&#39;s foot should be used so that a comfortable fit can be achieved independently from the tightness of the heel cup  5 . A hook and loop (Velcro®) shoe strap  42  is used in this example to make the shoe fit comfortably. In the preferred embodiment the strap should describe a Z shape to cover more of the user&#39;s foot. The heel cup is shown in  FIGS. 16A ,  16 B,  17 , and  18 . 
         [0040]    The shoe  40   a  further consists of hardware in the form of tabs  6  protruding from the sides of the sole of the shoe which are designed to attach to corresponding hardware that is permanently attached to a weight or a weight holding device such as a special dumbbell, enabling the wearer of the shoe to quickly and easily pick up and put down weights with their feet and to exercise by lifting the weights with their legs. 
         [0041]    The tabs  6  in this case are an integral part of an assembly, in this case a tab assembly  116 , shown in  FIGS. 15A  and B consisting of the tabs  6  and a main body  114  preferably comprising a single piece of stiff, sturdy and durable material such as Lexan® polycarbonate from SABIC Innovative Plastics, although any strong and durable material will do, including steel, brass, bronze, fiberglass, or any of several kinds of plastic, provided that said material can be firmly glued and is not brittle, or the tab assembly can be made of several pieces of differing materials. The tabs  6  also have a notch  24  and a concavity  22  which enable them to lock onto the hardware that comes with the weights as will be described in detail later. 
         [0042]    The concavity  22  is made by the addition of an ordinary metal washer  20  with a notch cut into it but it can also be made by drilling directly into the base material if the tabs are thick enough to accommodate that. 
         [0043]    The tab assembly  116  shown in detail in  FIGS. 15A and 15B  is passed through a void in the sole of the shoe so that a tab  6  protrudes on each side of the shoe and it is glued into that place using a glue that is suitable for the materials chosen for the tab assembly and the sole of the shoe. The tab assembly may further be mechanically fastened to the sole of the shoe using short deep thread screws. A thin rubber laminate  31  is then laminated to the bottom of the entire shoe including the tabs. The thin rubber laminate  31  can have a thin layer of stretch resistant fabric on its top side for added strength. While the main body  114  of the tab assembly  116  is shown in  FIGS. 15A  and B as a small and nearly square piece of material it can be made as large as the entire sole of the shoe and the same is true of the main body  114  of the peg assembly  115   a  shown in  FIGS. 13A-C  and  115   b  in  FIG. 14 . 
         [0044]    In the preferred embodiment the distance between the notches  24  in the tab assembly  116  would remain constant over several shoe sizes so that the distance between the posts  64 ,  90  on the weights  100  and the weight holding devices  61   a ,  61   b  can remain constant. This would enable different members of a single household to share weights and weight holding devices or a single person to use the same weights while their feet grow and their shoe size changes, and retailers would not have to stock the weights in a large variety of sizes. About four sizes of tab assembly  116  should be plenty even if the main body  114  of the tab assembly changes with every shoe size 
         [0045]      FIG. 2  shows a weight holding device  61   a  for use with the shoes  40   a  in  FIGS. 1A-D ,  8 A and B,  9  A-C, and  18 , and the shoes  40   b  in  FIG. 17 , and the sandals shown in  FIGS. 19A  and B. It consists of a  1 ″ diameter bar  62  that is fitted with a platform  60  and two threaded posts  64  and two wing nuts  66 . The approximate dimensions of the platform  60  are 7″ in width, 2.5″ front to back, and about 0.25″ in thickness, although the thickness is only for strength and can vary according to the material it is made of. The other dimensions of the platform can vary according to the size of the shoe  40   a  or  40   b  that is being used since the shoe  40   a  or  40   b  needs to fit between the threaded posts  64 , but the platform  60  and the distance between the posts  64  should be limited to a few sizes to match the few sizes of the tab assembly  116  for the reasons listed in paragraph 0044 above. The platform  60  also acts as a weight collar and prevents the weights  68  from moving any closer to the user&#39;s shoe  40   a  or  40   b  and maintains space for the user&#39;s fingers to operate the wing nuts  66 . 
         [0046]    The bar  62  is of a standard diameter for accepting normal barbell weights  68  that are available at most sporting goods stores. 
         [0047]      FIG. 3  shows the weight holding device of  FIG. 2  with normal barbell weights  68  added to the bars  62 . The weights  68  are held onto the bars  62  with ordinary weight clamps  70  which are also available at most sporting goods stores. The user of this invention would ideally have several of these weight holding devices  61   a  with a different amount of weight on each or several weights  100  to completely obviate the need for fumbling with the barbell weights  68 , but the invention is still very valuable for picking up and putting down the weight even if the user only has one. 
         [0048]    The shoes and weights of this invention work by the user wearing the shoes  40   a  sliding the tabs  6  under the wing nuts  66  so that the notches  24  accept the threaded posts  64  and the concavities  22  are directly under the wing nuts  66 . The user then tightens the wing nuts  66  into the concavities  22  until they are pressing firmly on the tabs  6  and are mostly surrounded by the washers  20 . The weight  100  or weight holding device  61   a  is now locked firmly to the shoe  40   a  because the notches  24  will not allow the threaded posts  64  to move left, right, or back; the washers  20  reach around the wing nuts  66  and will not allow them to move forward; and the wing nuts  66  will not allow the tabs  6  to come up off of the platform  60 . Additionally, the thin rubber laminate  31  on the bottoms of the tabs  6  is being pressed firmly to the platform  60  which creates friction preventing any horizontal movement of the shoe on the platform. The user is now free to lift his or her foot and hence the weight in any manner they desire. 
         [0049]    After performing the desired number of repetitions of a given exercise the user can quickly and easily remove the weight by loosening the wing nuts  66  and sliding their foot back off of the platform  60 . The user can then attach the weight to their other foot or attach a different weight to the same foot and continue exercising, or they can leave the weights off and do some upper body exercises with no weights attached to their feet. The shoes  40   a  will not interfere in any way with push ups, sit ups, walking, or almost any other exercise. The wing nuts  66  never need to be removed from the threaded posts  64 , only loosened enough to provide clearance for the washers  20 . 
         [0050]      FIGS. 4 ,  5 , and  6  show a top view and side views of a weight holding device  61   b  that replaces the threaded posts  64  and wing nuts  66  with smooth posts  90  and locking clamps  94 . 
         [0051]    The locking clamps  94  work in the same way as Visegrip® locking pliers and use most of the same components. With the locking clamps open as is shown in  FIG. 5 , the shoe  40   a  is slid onto the platform  60  so that the notches  24  accept the smooth posts  90 . With the concavity  22  mostly encircling the smooth post  90  and directly under the plunger  82 , the user locks the locking clamp  94  down onto the tab  6  by pushing down on the thumb lever  80  which causes the plunger  82  to go down into the concavity  22 .  FIG. 6  shows the locking clamp  94  in the position for holding down on a tab  6 . When the user wants to release the clamps they can simply pull up on the thumb lever  80 . This weight holding device also works with the shoes  40   b  in  FIG. 17 . 
         [0052]    The locking clamps  94  can be adjusted by means of the threaded rod  84 . With the locking clamps  94  open as in  FIG. 5  the user can slide the shoe  40   a  into position and depress the thumb lever  80 . If the user determines that the clamp is too tight or too loose they can release the clamp and then twist the threaded rod  84  and close the clamp again. When the desired tightness is achieved the user should tighten the locking nut  86  which will hold the threaded rod  84  in place. Clamps of this type are available from Good Hand Inc., 7141 Paramount Blvd., Pico Rivera, Calif. 90660. 
         [0053]      FIG. 7  shows a cross sectional view of the threaded rod  84  and plunger  82  from the locking clamp  94 . This view shows the hole  96  which accepts the smooth post  90  when the plunger  82  goes down into the concavity  22 . The smooth post  90  prevents the plunger  82  from moving on a horizontal plane and makes sure the plunger  82  goes in exactly the right place. 
         [0054]    The hole  96  has to be deep enough to keep the smooth post  90  from hitting the top of the hole  96  because that would prevent the plunger  82  from fully descending into the concavity  22 . There should always be some air space above the smooth post  90  when the locking clamp  94  is closed. 
         [0055]      FIGS. 8A and 8B  show the shoe  40   a  with the weight holding device  61   a  attached in the proper way. 
         [0056]      FIGS. 9A ,  9 B, and  9 C show a person using this invention to perform various exercises. 
         [0057]      FIG. 10  shows a special weight  100  designed specifically for use with the shoes  40   a  and  40   b  of this invention. It has a curved bottom  102  to facilitate walking a few steps to or from a chair and it can be made of plastic filled with sand, concrete, lead, etc. or it can be made of a single piece of cast iron. It can be made in various sizes. 
         [0058]      FIGS. 11A and 11B  show a front view and a perspective view of a different embodiment of this invention designed for use with the weight holding device  61   c  shown in  FIG. 12 . The tab assembly  116  is replaced by a peg assembly  115   a  shown in  FIGS. 13A-C , wherein the tabs  6  are replaced by pegs  110  and spacers  111 . 
         [0059]      FIG. 12  shows an end view of a weight holding device  61   c  which is designed for use with the shoes  40   c  shown in  FIGS. 11A and 11B . The user wearing the shoes  40   c  engages the weight holding device  61   c  by stepping down on it so that the pegs  110  are forced through the latches  112 . The latches  112  have a spring and close automatically to hold the pegs  110  in place. The spacers  111  contact the sides of the latch mechanisms  131  to prevent any lateral movement by the shoe  40   c . The distance filled by the spacers  111  should remain constant over several shoe sizes as is shown in  FIGS. 13A-C  and  FIG. 14  for the reasons discussed in paragraph 0044 above. When the user of this embodiment of the invention wants to release the shoe  40   c  from the latch mechanisms  131  they only have to depress the latch levers  113  and the latches  112  will move out of the way. 
         [0060]      FIGS. 13A-C  show a top, side, and front view of an assembly, in this case a peg assembly  115   a , used to make the shoes  40   c  of this invention. It consists of a main body  114 , pegs  110 , and spacers  111 . This is an alternative to the tab assembly  116  described in detail in paragraphs 0041-0043 above. It employs the same main body  114  and the considerations for the choice of materials are the same as for that embodiment, except that the pegs  110  should be made of steel. 
         [0061]    The peg assembly  115   a  is also built into the shoe  40   c  in basically the same manner as the tab assembly  116 . The peg assembly  115   a  is passed through a void in the sole of the shoe so that a peg and spacer protrude from each side. The peg assembly  115   a  is glued into that place using a suitable glue and like the tab assembly  116  may be further secured to the shoe sole with short deep thread screws. The main body  114  is again shown as a small and nearly square piece of material but as in the tab assembly  116  described in paragraph 0043 above, the main body can be as large as the entire footprint of the shoe. 
         [0062]    The difference in construction for shoes  40   c  using the peg assembly  115   a  compared to shoes  40   a  using the tab assembly  116  rests in the fact that the pegs  110  are higher than the tabs  6  and therefore the peg assembly  115   a  should not be in direct contact with the thin rubber laminate on the bottom of the shoe but should be placed higher in the sole of the shoe. 
         [0063]    If the main body  114  of the peg assembly  115   a  is small as shown in  FIGS. 13A-C , a layer of stretch resistant fabric can be added into the sole of the shoe  40   c  for added strength, but a larger main body is preferable and the same is true for the tab assembly  116 . 
         [0064]      FIG. 14  shows a top view of a peg assembly  115   b  which is the same in every way as the peg assembly  115   a  in  FIG. 13A  except that the main body  114  is smaller for a smaller shoe size while the pegs  110  and spacers  111  remain the same size and cover the same distance. 
         [0065]      FIGS. 15A and 15B  are a top and side view of the tab assembly  116  described in detail in paragraphs 0041 through 0043 above. 
         [0066]      FIGS. 16A and 16B  are a top and side view of the heel cup  5  hidden in the shoe  40   a  in  FIGS. 1A-D  and the shoe  40   c  in  FIGS. 11A and 11B .  FIGS. 17 and 18  show shoes with this same heel cup  5  glued to the outside of the shoe and  FIG. 18  further shows how the shoelace  44  is used to tighten the heel cup  5  without affecting the overall fit of the shoe. It should also be noted that the arms of the heel cup  134  will act as a draw string around the top of the user&#39;s foot in addition to the grip that the heel cup  5  will create on the user&#39;s heel. The shoes may be further engineered to enhance this feature. 
         [0067]      FIG. 17  shows a top view of a shoe  40   b  that uses a third version of hardware for attaching to weights. The tab  6  in  FIGS. 1A to 1D  is replaced by an abbreviated tab  32  which has an abbreviated washer  34  and an abbreviated concavity  36  and an abbreviated notch  38 . This can all be made by simply sawing the ends off of the tab assembly  116  shown in  FIGS. 15A and 15B .  FIG. 17  also shows the heel cup  5  glued to the outside of the shoe  40   b.    
         [0068]      FIG. 18  shows a side view of the shoe in  FIGS. 1A to 1D  but with the heel cup  5  on the outside of the shoe. 
         [0069]      FIGS. 19A and 19B  show a thin and flexible sandal which uses the tab assembly  116  as an integral part of its main body with a thin rubber laminate  30  and a non slip upper surface  28  as well as a heel cup and various straps to secure it to the shod foot of the user. Its thinness and flexibility make it safe and easy to use and to wear. It is shown as an alternative use for the tabs  6 , the tab assembly  116 , or any other such shoe part or assembly. 
         [0070]    Accordingly the reader will see that the shoes and weights and the various hardware of this invention will provide a method of lower body exercises that is effective, safe, easy to operate, low cost, and can be used and kept easily in a small room or apartment. 
         [0071]    Although the description above contains many specificities, exact descriptions of the hardware used to attach the weights to the shoes may be innumerable, and examples shown should not be construed as limiting the scope of this invention but as merely providing illustrations of some of the presently preferred embodiments of this invention. Parts that attach to corresponding hardware on the weights may be recessed into the sides or the bottom of the shoe&#39;s sole. Additionally, the shoes of this invention can be boots, loafers using the disclosed heel cup, high tops, or any other kind of shoe that is found to work. 
         [0000]    
       
         
               
             
               
               
             
           
               
                   
               
               
                 REFERENCE NUMERALS USED IN DRAWINGS 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                  5 
                 heel cup 
               
               
                  6 
                 tab 
               
               
                 20 
                 washer 
               
               
                 22 
                 concavity 
               
               
                 24 
                 notch 
               
               
                 28 
                 non-slip surface 
               
               
                 30 
                 thin rubber laminate 
               
               
                 31 
                 thin rubber laminate 
               
               
                 32 
                 abbreviated tab 
               
               
                 34 
                 abbreviated washer 
               
               
                 36 
                 abbreviated concavity 
               
               
                 38 
                 abbreviated notch 
               
               
                  40a 
                 shoe with tabs 
               
               
                  40b 
                 shoe with abbreviated tabs 
               
               
                  40c 
                 shoe with pegs 
               
               
                 42 
                 shoe strap 
               
               
                 44 
                 shoelace 
               
               
                 60 
                 platform 
               
               
                  61a 
                 weight holding device with wing nuts 
               
               
                  61b 
                 weight holding device with locking clamps 
               
               
                  61c 
                 weight holding device with latch mechanism 
               
               
                 62 
                 bar 
               
               
                 64 
                 threaded post 
               
               
                 66 
                 wing nut 
               
               
                 68 
                 barbell weight 
               
               
                 70 
                 weight clamp 
               
               
                 80 
                 thumb lever 
               
               
                 82 
                 plunger 
               
               
                 84 
                 threaded rod 
               
               
                 86 
                 locking nut 
               
               
                 90 
                 smooth post 
               
               
                 94 
                 locking clamp 
               
               
                 96 
                 hole 
               
               
                 100  
                 special weight 
               
               
                 102  
                 curved bottom 
               
               
                 110  
                 peg 
               
               
                 111  
                 spacer 
               
               
                 112  
                 latch 
               
               
                 113  
                 latch lever 
               
               
                 114  
                 main body of assembly 
               
               
                 115a 
                 peg assembly 
               
               
                 115b 
                 small peg assembly 
               
               
                 116  
                 tab assembly 
               
               
                 131  
                 latch mechanism 
               
               
                 134  
                 arm of heel cup