Patent Publication Number: US-2022218069-A1

Title: Fully convertible high heel-to-flat shoe

Description:
This application is a continuation of U.S. application Ser. No. 16/035,321, filed Jul. 13, 2018, for FULLY CONVERTIBLE HIGH HEEL-TO-FLAT SHOE, which claims the benefit of U.S. Provisional Application No. 62/532,890, filed Jul. 14, 2017, for FULLY CONVERTIBLE HIGH HEEL-TO-FLAT SHOE, both of which are incorporated in their entirety herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to an innovative convertible high heel shoe design, that allows for the transformation of a high heeled shoe into a flat shoe, and vice versa, and more specifically to a shoe comprised of a removable stelo, a removable high heel attachment, and the corresponding attachment systems integrated into the base shoe sole. 
     2. Discussion of the Related Art 
     According to the American Podiatric Medical Association, close to half of US women wear high heels regularly, even though 71% say that the shoes hurt their feet. Currently, the only solutions to stiletto associated pain are for women to either suffer through, take off their shoes and continue on barefoot, or to carry along an extra pair of shoes to change into. None of these methods allow for ultimate convenience or comfort. 
     Several prior attempts have been made to create convertible footwear as a solution to these problems. Previous designs include heels of an interchangeable nature (swapping out heels of one height for a heel of a lower height) using both clamp systems and click-on systems, heels that fold into the sole of the shoe creating a wedge, heels that slide into the sole on a slide track system, a screw-on heel, a heel with a system in place to adjust the high heel width, and others of a similar nature. 
     A need exists in the field of high-heeled footwear to maximize both comfort and practicality. This is embodied in the invention of transformable footwear—an convertible shoe that is both a high heel and a sandal. This way, wearers can adapt their footwear to meet their changing needs throughout the duration of wearing a pair of shoes. 
     SUMMARY 
     The present disclosure describes a shoe including three parts: a removable stelo, a removable high heel attachment, and the corresponding attachment systems integrated into the base shoe sole. The removable high heel attachment may include a standard heel of any design, width and height that has a locking system comprising an interlocking post located at the heel base. 
     In one embodiment, the locking system attached to the heel base allows for the removable heel attachment to be inserted into a removable heel attachment platform at the heel of a flexible base shoe sole. The removable stelo is a rigid piece resembling the portion of the outsole of an elevated heeled shoe where the stelo support piece is integrated. The removable stelo may feature a connecting mechanism on the toebox end of the insert comprising a toebox interlock that connects at a corresponding toebox interlock receiver on the rear end of the toebox portion of the base shoe sole outsole. On the opposite end of the removable stelo—that faces the heel portion of the shoe—there may be a connecting mechanism that corresponds to locations on both the heel of the base shoe sole outsole and the removable heel insert. 
     An apparatus in accordance with another embodiment of a transformable high heel shoe is described and may include a toe box platform including a stelo receiver, a heel platform including an interlocking portion, a flexible sole element interposed between the toe box platform and the heel platform, a stelo including a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element, and a removable heel removably coupleable to the heel platform at the interlocking portion. 
     A method of producing a shoe may include providing a toe box platform including a stelo receiver, providing a heel platform including an interlocking portion, providing a flexible sole element interposed between the toe box platform and the heel platform, providing a stelo including a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element, and providing a removable heel removably coupleable to the heel platform at the interlocking portion. 
     A method of transforming a high heeled shoe to a flat shoe is described. The method may include retaining a toe box platform including a stelo receiver, retaining a heel platform including an interlocking portion, retaining a flexible sole element interposed between the toe box platform and the heel platform, removing a stelo including a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element, and removing a removable heel from the heel platform at the interlocking portion. 
     In some examples of the shoe and method described above, the interlocking portion includes a puck coupled to the heel platform. In some examples of the shoe and method described above, the stelo receiver includes a forefoot pin oriented laterally at a proximal portion of the toe box platform. In some examples of the shoe and method described above, the toe interlock includes a notch configured to interlock with the forefoot pin at the stelo receiver. 
     In some examples of the shoe and method described above, the stelo is interposed between the removeable heel and the interlocking portion. In some examples of the shoe and method described above, the stelo and the removable heel are configured to remain together upon removal of the removable heel from the interlocking portion. In some examples of the shoe and method described above, the removable heel is configured to release from the interlocking portion by rotating the removable heel by at least fifteen degrees. 
     In some examples of the shoe and method described above, the stelo includes a leading edge rib configured to engage the interlocking portion. In some examples of the shoe and method described above, the stelo has a lateral curved profile. In some examples of the shoe and method described above, the stelo includes a post coaxial with an axis of rotation of the removable heel, wherein the removable heel includes a cylindrical cavity configured to receive the post. 
     In some examples of the shoe and method described above, the stelo includes the post, wherein the post includes a compressible distal end. In some examples of the shoe and method described above, the stelo includes a recurve. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an example of an isometric view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 2  shows an example of a side view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 3  shows an example of an isometric separated view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 4  shows an example of a back view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 5  shows an example of an isometric view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIGS. 6 and 7  show an example of a top view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIGS. 8 and 9  show an example of an isometric view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 10  shows an example of an isometric bottom view of the base shoe sole in accordance with aspects of the present disclosure. 
         FIG. 11  shows an example of an isometric top view of the base shoe sole in accordance with aspects of the present disclosure. 
         FIG. 12  shows an example of an isometric separated view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 13  shows an example of a side view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 14  shows an example of a bottom view of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 15  shows an example of a back view cross section of the back of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIG. 16  shows an example of a side view of a stelo in accordance with aspects of the present disclosure. 
         FIG. 17  shows an example of an attachment platform in accordance with aspects of the present disclosure. 
         FIG. 18  shows an example of a front view of a removable heel attachment in accordance with aspects of the present disclosure. 
         FIG. 19  shows an example of a side view of a removable heel attachment in accordance with aspects of the present disclosure. 
         FIG. 20  shows an example of a heel lock in accordance with aspects of the present disclosure. 
         FIG. 21  shows an example of a heel cap in accordance with aspects of the present disclosure. 
         FIG. 22  shows an example of a side view cross section of the back of a high heel shoe base in accordance with aspects of the present disclosure. 
         FIGS. 23 through 24  show an example of a high heel shoe heel connection mechanism in accordance with aspects of the present disclosure. 
         FIG. 25  shows an example of a process for producing a shoe in accordance with aspects of the present disclosure. 
         FIG. 26  shows an example of a process for transforming a high heel shoe to a low heel shoe in accordance with aspects of the present disclosure. 
     
    
    
     Table 1 summarizes ranges and specifications for one example of a high heel shoe in accordance with the present disclosure. 
     DETAILED DESCRIPTION 
     The following description is not to be taken in a limiting sense, but is made merely for the purpose of describing the general principles of exemplary embodiments. The scope of the invention should be determined with reference to the claims. 
     Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment. 
     New transformable heel-to-flat footwear and the necessary elements for creation of such a product are discussed herein. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be evident, however, to one skilled in the art that the present invention may be practiced without these specific details. 
     The present disclosure utilizes the term “stelo” to refer to removable rigid sole support, or shank, including a shank, shankpiece, or shank spring that serves as the bridge between the heel and the ball of the shoe. A stelo may be built into the midsole to offer reinforcement to create the arch of the heel. The contour and design of the shank depends on the type of shoe and height of the heel. Its purpose is to maintain the shape or style of the shoe by preventing it from collapsing or distorting and providing elasticity to the design. 
     A stelo may serve the same purpose as a traditional shank. However, a stelo can be removed from the shoe, allowing the user to modify the shape, design, and function of the shoe especially relating to the adjustment of the heel height. The present disclosure describes the use of a stelo for a high heel shoe, but it may also be used for work boots, flats, men&#39;s dress shoes, bike shoes, bowling shoes, orthotic shoes, welted shoes, or any other shoe not listed with a heel piece. 
     The term “heel base” as used herein refers to the upper surface of a removable heel attachment present at the end of the high heel attachment opposite the “top piece,” with the “top piece” being the industry term for the bottom of the physical high heel that comes into contact with the ground when walking. Thus, the heel base is the end of the removable heel attachment that is directly beneath the “counter” of a standard high heel when fully assembled. 
       FIG. 1  shows an example of an isometric view of a high heel shoe base  100  in accordance with aspects of the present disclosure. High heel shoe base  100  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 2-9, and 13-15 . High heel shoe base  100  may include shoe sole element  105 , toebox base  110 , attachment platform  115 , stelo  120 , heel attachment  125 , concave portion  130 , and convex portion  135 . 
     As shown, the flexible shoe sole element  105 , the solid toebox base  110 , the removable heel attachment platform  115 , the removable stelo  120 , and the removable heel attachment  125  are used to create the structure of a high heel shoe. In operation, the flexible shoe sole element  105  is coupled to the solid toebox base  110  and the removable heel attachment platform  115  to create the base shoe sole. The removable stelo  120  is inserted to provide the structural support needed in the raised high heel formation, and the removable heel attachment  125  is attached to create the completed high heel formation. 
     An convertible high heel is shown comprising of three novel parts: a removable stelo  120 , a removable heel attachment  125 , and the corresponding attachment systems integrated into the base. The removable stelo  120  is a rigid insert of any material that has a curvature resembling the shape of a standard high-heel shoe sole in the elevated heel position (generally “S”-shaped or curved, as viewed from the side so as to provide a concave portion  130  proximate to where the removable stelo  120  interfaces with the solid toebox base  110 , and, optionally, a convex portion  135  proximate to where the removable stelo  120  interfaces with the removable heel attachment platform  115 ). The removable heel attachment  125  may be a high heel of any height, design, width, and material that contains the threaded post located at the heel base. 
     In accordance with the present embodiment of the high-heel shoe formation, the removable stelo  120  is attached by connecting the toebox interlock tabs into the toebox interlock slots. The removable sole support lock key will be connected to the corresponding receiving mechanism located on the solid heel portion of the removable sole support lock keyhole. When the heel interlocking mechanism is completely assembled, the interlocking mechanism will create an opening defined by the thread track created by threaded key arc section and the threaded keyhole section. 
     The removable heel attachment  125  is threadably coupled to the removable heel support attachment by threading the threaded post located on removable heel attachment  125  into the thread track of the opening created jointly by the threaded key arc section and the threaded keyhole section. In its final form, the removable heel attachment  125  attaches at the opening and at least partially covers and secures the removable sole support lock keyhole, preventing accidental removal of the removable heel attachment platform  115 . 
     In operation of the flat shoe formation, the removable heel attachment  125  and the removable stelo  120  can be removed, allowing the flexible base shoe sole to be used autonomously. In practice, a user will generally begin with the shoe configured as a high heel, with the removable heel attachment platform  115  and the removable heel attachment  125  secured in place. When the user wishes to convert the shoe into a flat, the removable heel attachment  125  is rotated to disengage the thread track from the threaded post of the removable heel attachment  125 . This disengagement results in the separation of the removable heel attachment  125  from the shoe and releases the removable sole support lock key from the removable sole support lock keyhole. The removable heel attachment platform  115  is then rotated away from the flexible base shoe sole, and the toebox interlock tabs are slid toward the rear of the shoe to disengage the toebox interlock tabs from the toebox interlock slots. 
     With the removal of the removable stelo  120 , the stelo  120  no longer supports the shank of the shoe in a high heel configuration, and the flexible base shoe sole allows the removable heel attachment platform  115  to drop to the ground and serve as the heel of the shoe. The removable stelo  120  and the removable heel attachment  125  can then be stored away, with the shoe assuming the form of a flat. This process is reversed to convert the shoe from a flat into a high heel. 
     Optional add-ons to this product include, but are not limited to, a high heel wedge attachment of any height, width and material; a removable sole support attachment created in conjunction with a different connecting mechanism than the one previously described; a removable heel attachment  125  created in conjunction with a different connecting mechanism than the one previously described. 
     With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. 
     The shoe sole element  105  may be an example of a flexible sole element interposed between the toe box platform and the heel platform. Shoe sole element  105  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 2-5, 10-13, 15, and 22-24 . 
     The toebox base  110  may be an example of a toe box platform including a stelo receiver. In some examples, the stelo receiver includes a forefoot pin oriented laterally at a proximal portion of the toe box platform. Toebox base  110  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 2-6, 9-13, and 14 . 
     The attachment platform  115  may be an example of a heel platform including an interlocking portion. In some examples, the interlocking portion includes a puck coupled to the heel platform. Attachment platform  115  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 2-7, 9-13, 15, 17, and 22-24 . 
     The stelo  120  may include a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo  120  is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element. 
     In some examples, the toe interlock includes a notch configured to interlock with the forefoot pin at the stelo receiver. In some examples, the stelo  120  is interposed between the removeable heel and the interlocking portion. In some examples, the stelo  120  includes a leading edge rib configured to engage the interlocking portion. In some examples, the stelo  120  has a lateral curved profile. 
     In some examples, the stelo  120  includes a post coaxial with an axis of rotation of the removable heel, wherein the removable heel includes a cylindrical cavity configured to receive the post. In some examples, the stelo  120  includes the post, wherein the post includes a compressible distal end. In some examples, the stelo  120  includes a recurve. Stelo  120  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 2-9, 12-14, 16, and 22-24 . 
     The heel attachment  125  may be an example of a removable heel removably coupleable to the heel platform at the interlocking portion. In some examples, the stelo  120  and the removable heel are configured to remain together upon removal of the removable heel from the interlocking portion. In some examples, the removable heel is configured to release from the interlocking portion by rotating the removable heel by at least fifteen degrees. Heel attachment  125  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 2-5, 9, 12, 14, 18, 19 , and  22 - 24 . 
       FIG. 2  shows an example of a side view of a high heel shoe base  200  in accordance with aspects of the present disclosure. High heel shoe base  200  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 3-9, and 13-15 . High heel shoe base  200  may include shoe sole element  205 , toebox base  210 , attachment platform  215 , stelo  220 , and heel attachment  225 . 
     As shown, the flexible shoe sole element  205 , the solid toebox base  210 , the removable heel attachment platform  215 , the removable stelo  220 , and the removable heel attachment  225  are used to create the structure of a high heel shoe. In operation, the flexible shoe sole element  205  is coupled to the solid toebox base  210  and the removable heel attachment platform  215  to create the base shoe sole. The removable stelo  220  is inserted to provide the structural support needed in the raised high heel formation, and the removable heel attachment  225  is attached to create the completed high heel formation. 
     Shoe sole element  205  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 3-5, 10-13, 15, and 22-24 . Toebox base  210  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 3-5, 6, 9-13, and 14 . Attachment platform  215  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 3-5-7, 9-13, 15, 17, and 22-24 . Stelo  220  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 3-9, 12-14, 16, and 22-24 . Heel attachment  225  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 3-5, 9, 12, 14, 18, 19, and 22-24 . 
       FIG. 3  shows an example of an isometric separated view of a high heel shoe base  300  in accordance with aspects of the present disclosure. The features are shown separated to show how they structurally fit together in one embodiment of the complete high heel assembly. In operation, the features are combined as described to execute the complete high heel formation. High heel shoe base  300  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 2, 4-9, and 13-15 . 
     High heel shoe base  300  may include shoe sole element  305 , toebox base  310 , toebox interlock slots  315 , attachment platform  320 , stelo  325 , toebox interlock tabs  330 , sole support lock key  335 , keyhole section  340 , heel attachment  345 , and post  350 . 
     In the present embodiment, the removable stelo  325  contains a dual interlocking mechanism, with the removable sole support lock key  335  located at the heel end of the removable stelo  325  (where the removable stelo  325  interfaces with the removable heel attachment platform  320 ) that then connects into the corresponding mechanism at the heel of the removable sole support lock keyhole, and the toebox interlock tabs  330  located at the toebox end of the removable stelo  325  (where the removable stelo  325  interfaces with the solid toebox base  310 ) that then connects to the toebox interlock slots  315 . 
     In other embodiments, the removable stelo  325  includes just one interlocking mechanism located on either end of the removable stelo  325 , or any number of interlocking mechanisms located elsewhere on the removable stelo  325 . 
     The toebox interlock tabs  330  of the aforementioned dual interlocking mechanism located on the removable stelo  325  is the mechanism located at the end interacting with the base shoe sole. In the present embodiment, this interlocking mechanism includes a locking mechanism located at the edge of the removable stelo  325  that then connects to the toebox interlock slots  315  located on the toebox portion of the solid toebox base  310 . In other embodiments, one of ordinary skill in the art will appreciate that various interlocking mechanisms are suitable to achieve the objectives described herein. By way of example, the interlocking mechanism may be a tongue-and-groove interlocking mechanism in which the toebox interlock slots  315  includes a groove and the toebox interlock tabs  330  includes a tongue or tab that slides into the groove in order to constrain movement of the toebox interlock tabs  330  relative to the toebox interlock slots  315  to a single direction vector. 
     The removable sole support lock key  335  of the aforementioned dual interlocking mechanism located on the removable stelo  325  is the mechanism located at the end interacting with the removable heel attachment platform  320 . 
     Shoe sole element  305  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 2, 4, 5, 10-13, 15, and 22-24 . Toebox base  310  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 2, 4-6, 9-13, and 14 . 
     Toebox interlock slots  315  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 5, and 8 . Attachment platform  320  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 2, 4, 5-7, 9-13, 15, 17, and 22-24 . 
     Stelo  325  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 2, 4-9, 12-14, 16, and 22-24 . Toebox interlock tabs  330  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 5-7, and 8 . Sole support lock key  335  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 6-8, and 9 . Keyhole section  340  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 5-8, and 9 . 
     Heel attachment  345  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1, 2, 4, 5, 9, 12, 14, 18, 19, and 22-24 . Post  350  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 9 . 
       FIG. 4  shows an example of a back view of a high heel shoe base  400  in accordance with aspects of the present disclosure. The features are shown separated to show how they structurally fit together in one embodiment of the complete high heel assembly. In operation, the features are combined as described to execute the complete high heel formation. 
     High heel shoe base  400  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-3, 5-9, and 13-15 . High heel shoe base  400  may include shoe sole element  405 , toebox base  410 , toebox interlock slots  415 , attachment platform  420 , sole support lock keyhole  425 , key arc section  430 , stelo  435 , and heel attachment  440 . 
     Shoe sole element  405  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-3, 5, 10-13, 15, and 22-24 . Toebox base  410  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-3, 5, 6, 9-13, and 14 . 
     Toebox interlock slots  415  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5, and 8 . Attachment platform  420  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-3, 5-7, 9-13, 15, 17, and 22-24 . 
     Sole support lock keyhole  425  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 5-7, 9, and 10 . Key arc section  430  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 5-7, 9, and 10 . 
     Stelo  435  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-3, 5-9, 12-14, 16, and 22-24 . The heel attachment  440  may be an example of a removable heel removably coupleable to the heel platform at the interlocking portion. Heel attachment  440  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-3, 5, 9, 12, 14, 18, 19, and 22-24 . 
       FIG. 5  shows an example of an isometric view of a high heel shoe base  500  in accordance with aspects of the present disclosure. The features are shown separated to show how they structurally fit together in one embodiment of the complete high heel assembly. In operation, the features are combined as described to execute the complete high heel formation. 
     High heel shoe base  500  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-4, 6-9, and 13-15 . High heel shoe base  500  may include shoe sole element  505 , toebox base  510 , toebox interlock slots  515 , attachment platform  520 , sole support lock keyhole  525 , key arc section  530 , stelo  535 , toebox interlock tabs  540 , keyhole section  545 , and heel attachment  550 . 
     Shoe sole element  505  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-4, 10-13, 15, and 22-24 . Toebox base  510  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-4, 6, 9-13, and 14 . Toebox interlock slots  515  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 4, and 8 . 
     The attachment platform  520  may be an example of a heel platform including an interlocking portion. Attachment platform  520  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-4, 6, 7, 9-13, 15, 17, and 22-24 . 
     Sole support lock keyhole  525  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 6, 7, 9, and 10 . Key arc section  530  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 6, 7, 9, and 10 . 
     Stelo  535  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-4, 6-9, 12-14, 16, and 22-24 . Toebox interlock tabs  540  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, and 6-8 . 
     Sole support lock keyhole  525  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 6, 7, 9, and 10 . Keyhole section  545  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 6-8, and 9 . Heel attachment  550  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-4, 9, 12, 14, 18, 19, and 22-24 . 
       FIG. 6  shows an example of a top view of a high heel shoe base  600  in accordance with aspects of the present disclosure. The features are shown separated to show how they structurally fit together in the present embodiment of the complete high heel outsole assembly. In operation, the features are combined as described to execute the complete high heel outsole formation. 
     High heel shoe base  600  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 7-9, and 13-15 . High heel shoe base  600  may include toebox base  605 , attachment platform  610 , sole support lock keyhole  615 , key arc section  620 , stelo  625 , toebox interlock tabs  630 , sole support lock key  635 , and keyhole section  640 . 
     Toebox base  605  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9-13, and 14 . Attachment platform  610  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 7, 9-13, 15, 17, and 22-24 . 
     Sole support lock keyhole  615  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 5, 7, 9, and 10 . Key arc section  620  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 5, 7, 9, and 10 . 
     Stelo  625  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 7-9, 12-14, 16, and 22-24 . Toebox interlock tabs  630  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5, 7, and 8 . Sole support lock key  635  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 7, 8, and 9 . Keyhole section  640  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5, 7, 8, and 9 . 
       FIG. 7  shows an example of a top view of a high heel shoe base  700  in accordance with aspects of the present disclosure. The features are shown assembled to show how they structurally fit together to create, in one embodiment, the complete threaded heel connecting mechanism. In operation, the features are combined as described to execute the complete threaded heel connecting mechanism by jointly using the threaded keyhole section  735  and the threaded key arc section  715  to create the finished thread track needed to insert the threaded post of the removable heel attachment. 
     High heel shoe base  700  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 8, 9, and 13-15 . High heel shoe base  700  may include attachment platform  705 , sole support lock keyhole  710 , key arc section  715 , stelo  720 , toebox interlock tabs  725 , sole support lock key  730 , and keyhole section  735 . 
     In a present embodiment, an interlocking mechanism includes a locking mechanism located at the removable sole support lock key  730  of the removable stelo  720  that connects to a “keyhole” cavity in the removable sole support lock keyhole  710 , with threads running along the threaded keyhole section  735 . The threaded keyhole section  735  interlocks with threads in the threaded post when combined with a remaining portion of the thread track located at the threaded key arc section  715  adjacent to the removable sole support lock keyhole  710 . The removable sole support lock key  730  is constrained by the removable sole support lock keyhole  710  to move relative to the removable sole support lock key  730  in the direction of a second direction vector, wherein the second direction vector is not parallel to the single direction vector. When the removable sole support lock key  730  and the removable sole support lock keyhole  710  are interlocked, and the thread tracks are aligned, the threaded post is threaded into the resulting threaded opening, and tightened in place. 
     This arrangement simultaneously secures the removable sole support lock key  730  to the removable sole support lock keyhole  710  and secures the removable heel attachment to the convertible high heel. In other embodiments, different connecting mechanism is at the location of the removable sole support lock key  730 , the removable sole support lock keyhole  710  is replaced with a protrusion or a cavity, and the thread track created by threaded keyhole section  735  and the threaded key arc section  715  to interact with the threaded post is replaced by a singular autonomously operating thread track, multiple thread tracks in a different execution, or a different insertion mechanism altogether. 
     As shown, the removable heel attachment platform  705  also includes a portion of the removable sole support lock keyhole  710  for the removable sole support attachment with the corresponding heel locking mechanism located at the removable sole support insert. Other possible embodiments of the mechanism could include other formations of a threading track, and other locking systems besides threading including but not limited to slide tracks, slots, prong, click and push systems. In regards to other embodiments of the mechanism, the extrusion and insertion points of this mechanism can be executed in any foreseeable shape. 
     Attachment platform  705  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 9-13, 15, 17, and 22-24 . Sole support lock keyhole  710  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4-6, 9, and 10 . Key arc section  715  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4-6, 9, and 10 . 
     Stelo  720  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 8, 9, 12-14, 16, and 22-24 . Toebox interlock tabs  725  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5, 6, and 8 . 
     Sole support lock key  730  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 6, 8, and 9 . Keyhole section  735  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5, 6, 8, and 9 . 
       FIG. 8  shows an example of an isometric view of a high heel shoe base  800  in accordance with aspects of the present disclosure. The features are shown disassembled to show how the removable stelo  810  connects to the solid toebox base when executing the present embodiment of the high heel formation. In operation, the toebox interlock tabs  815  are coupled to the toebox interlock slots  805 . 
     High heel shoe base  800  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9, and 13-15 . High heel shoe base  800  may include toebox interlock slots  805 , stelo  810 , toebox interlock tabs  815 , sole support lock key  820 , and keyhole section  825 . 
     In the embodiment shown, the solid toebox base contains toebox interlock slots  805  along the back portion and interior corresponding to the toebox interlock tabs  815 . In other embodiments of the invention, any type of connecting mechanism could be used at the juncture of the toebox interlock slots  805  and the toebox interlock tabs  815  including but not limited to slide tracks, prongs, and wedge-type insertions with the receptors and/or extrusions located on either portion of the mechanism and in any number. 
     Toebox interlock slots  805  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 4, and 5 . Stelo  810  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9, 12-14, 16, and 22-24 . 
     Toebox interlock tabs  815  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5, 6, and 7 . Sole support lock key  820  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 6, 7, and 9 . Keyhole section  825  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5-7, and 9 . 
       FIG. 9  shows an example of an isometric view of a high heel shoe base  900  in accordance with aspects of the present disclosure. High heel shoe base  900  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-8, and 13-15 . High heel shoe base  900  may include toebox base  905 , attachment platform  910 , sole support lock keyhole  915 , key arc section  920 , stelo  925 , sole support lock key  930 , keyhole section  935 , heel attachment  940 , and post  945 . 
     The threaded keyhole section  935  and threaded key arc section  920  form the finished thread track and are shown assembled to show how the disassembled removable heel attachment  940  and threaded post  945  integrate into the mechanism when fully assembled. 
     In the embodiment as shown, the interlocking mechanism includes the threaded post  945 . The threaded post  945  is threaded into the thread track created by the removable sole support lock keyhole  915  and the threaded key arc section  920 . Other embodiments of this locking mechanism may include different shape varieties pertaining to the mechanism located at the threaded post  945 , other formations of a thread track other than the thread track created by the combination of the removable sole support lock keyhole  915  and the threaded key arc section  920 , and other locking systems besides threading including but not limited to slide tracks, slots, prongs, and click and push systems. 
     Threading along the internal edge of this threaded key arc section  920  works in conjunction with the threading along the threaded keyhole section  935  to provide the complete thread track to allow for insertion of the removable heel attachment  940  as shown. 
     Toebox base  905  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 10-13, and 14 . Attachment platform  910  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 10-13, 15, 17, and 22-24 . 
     Sole support lock keyhole  915  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 5-7, and 10 . Key arc section  920  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4, 5-7, and 10 . 
     Stelo  925  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-8, 12-14, 16, and 22-24 . Sole support lock key  930  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, and 6-8 . 
     Keyhole section  935  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 3, 5-7, and 8 . The heel attachment  940  may be an example of a removable heel removably coupleable to the heel platform at the interlocking portion. 
     Heel attachment  940  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 12, 14, 18, 19, and 22-24 . Post  945  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 3 . 
       FIG. 10  shows an example of an isometric bottom view of the base shoe sole  1000  in accordance with aspects of the present disclosure. Base shoe sole  1000  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 11 . Base shoe sole  1000  may include shoe sole element  1005 , toebox base  1010 , attachment platform  1015 , sole support lock keyhole  1020 , and key arc section  1025 . 
     When all assembled as shown in the figure, the flexible shoe sole element  1005 , the solid toebox base  1010 , the removable heel attachment platform  1015 , the removable sole support lock keyhole  1020 , and the threaded key arc section  1025  combine to form the flexible base shoe sole  1000 . In operation of the present embodiment of the flat shoe execution, this base shoe sole  1000  functions autonomously as a shoe sole itself. 
     The flexible base shoe sole  1000  as shown includes three elements, the first of which is a flexible shoe sole that runs the length of the flexible shoe sole element  1005 . The flexible shoe sole element  1005  approximates the shape and flexibility of a standard flat shoe sole and can be included of any material, but will be flexible in nature. The flexible shoe sole element  1005  is attached to two solid pieces that in combination make up the flexible base shoe sole  1000 . The first of these solid pieces is attached to the toebox portion of the solid toebox base  1010 . The solid toebox base  1010  approximates the shape and flexibility of a standard shoe sole element  1005  located at the outsole portion of the toebox section of a shoe. The solid toebox base  1010  can be out of any suitable material and is solid in its execution. 
     The second solid piece that will make up the solid toebox base  1010  in its entirety will be attached to the heel portion of the shoe at the removable heel attachment platform  1015 . It will resemble the shape of a standard flat shoe heel, and in one embodiment will contain an indented center section in an arc-shape that follows the shape of the outer edge of the heel. 
     Shoe sole element  1005  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 11, 12, 13, 15, and 22-24 . Toebox base  1010  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 9, 11, 12, 13, and 14 . Attachment platform  1015  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9, 11, 12, 13, 15, 17, and 22-24 . 
     Sole support lock keyhole  1020  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4-7, and 9 . Key arc section  1025  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 4-7, and 9 . 
       FIG. 11  shows an example of an isometric top view of the base shoe sole  1100  in accordance with aspects of the present disclosure. Base shoe sole  1100  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 10 . Base shoe sole  1100  may include shoe sole element  1105 , toebox base  1110 , and attachment platform  1115 . 
     When all assembled in conjunction as shown in the figure, the flexible shoe sole element  1105 , the solid toebox base  1110 , and the removable heel attachment platform  1115  combine to create the flexible base shoe sole  1100 . In operation of the present embodiment of the flat shoe execution, this flexible base shoe sole  1100  functions itself as a shoe sole when the shoe is configured as a flat. 
     Shoe sole element  1105  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10, 12, 13, 15, and 22-24 . Toebox base  1110  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 9, 10, 12, 13, and 14 . Attachment platform  1115  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9, 10, 12, 13, 15, 17, and 22-24 . 
       FIG. 12  shows an example of an isometric separated view of a high heel shoe  1200  base in accordance with aspects of the present disclosure. High heel shoe  1200  may include footbed  1205 , attachment platform  1210 , heel cap  1215 , shoe sole element  1220 , stelo  1225 , forefoot pin  1230 , toebox base  1235 , heel lock  1240 , heel attachment  1245 , heel rod  1250 , and heel tip  1255 . 
     In some examples, the heel attachment  1245  may be used as a fastener to attach the removable stelo  1225 . The attachment platform  1210  (a.k.a. receiving component, or “puck”) may be co-molded with the shoe sole element  1220 . The stelo  1225  and the heel attachment  1245  may be attached together to install and remove as a single unit. They may also be pulled apart and separated. For example, the heel attachment  1245  and stelo  1225  may be removed using a quarter turn clockwise and a pivot about the forefoot pin  1230 . The angle of the stelo  1225  from around the forefoot pin  1230  may range from 15 degrees to 90 degrees. In some examples, a pivot of 35 degrees may be used to clear the forefoot pin  1230 . 
     The stelo  1225  may be a removable shank, shankpiece, or shank spring that inserts into a slot between the midsole and a forefoot pin  1230  in the outsole and is secured in place when in an arched position. A hook on the toe box end of the shank curves around the forefoot pin  1230  to secure it in place. 
     The heel end of the stelo  1225  may have a snap-in plug onto which the detachable heel locks  1240 . The stelo  1225  is the partial width and partial length of the shoe, running from the ball part of the sole to the center of the heel. The shape of the stelo  1225  may similar to a shoe shank, in that it follows the arch of the heeled shoe. The purpose of the stelo  1225  is to create an arch in the shoe and maintain the structure of the shoe when the detachable heel attachment  1245  is secured in place. 
     The shank is built into the midsole and runs the length of the shoe from heel to ball, corresponding to the medial and lateral arches. The shank or shanks may be attached in any of the following areas of the shoe: the toe box, the sole including the platform, ball, or midsole, the bridge or waist, the bottom filling, or the heel including the heel base, breast, and seat. 
     Attachment mechanism types for the stelo  1225  include but are not limited to a dual interlocking mechanism, twisting mechanism, slide tracks, wedge-type insertions with receptors or extrusions, slots, prong, click and push systems, or threading. The stelo  1225  can be made of wood, steel, carbon fiber, plastic, nylon, fiberglass, Kevlar, or any other material in any combination and ratio. 
     In some cases, the stelo  1225  may be the primary determinant of overall shoe stiffness. Thus, the stelo  1225  may be designed to be stiff enough and broad enough to add the required stability to the heeled shoe, but leave enough material in the shoe sole element  1220  such that the flat shoe is sufficiently stiff and stable. Stiffness of the stelo  1225  may be maximized by using a curved profile and central rib (running down the length or most of the length of the stelo, normal to the arc of the curved profile), and may be supported with additional ribs (e.g., parallel to the central rib). 
     Potential shapes for the stelo  1225  include but are not limited to a strip or ribbon of a plated material, that can feature ridges or curves that add strength. The stelo  1225  may have punched holes for eyelet attaching, pointed spurs for pressure attachment, or any other design enabling attachment to a shoe. The stelo  1225  design may be the full width of the shoe, partial width of the shoe, full length of the shoe, or partial length of the shoe in any variation and combination. In some examples, the contour of the stelo  1225  is determined by heel height. 
     Attachment of the heel, and avoiding inadvertent twist and potential removal, may be achieved using a number of features based on friction. Interference between the stelo  1225 , heel lock  1240 , and attachment platform  1210  cause friction between those parts and prevents rotation. Similarly, interference between shoe sole element  1220  and heel attachment  1245  compresses the shoe sole element  1220  and causes more significant friction. 
     A molded pin on the stelo  1225  that extends into the heel lock  1240  may offer some additional stability, but the primary function of this feature is to join the heel attachment  1245  and stelo  1225  such that they may be removed as a single part. In some cases, the shoe does not rely on this pin for structural stability. Rather, the stability and rigidity of the joint between the stelo  1225  and the heel attachment  1245  may be achieved by the contact between the top of the heel lock  1240  and the underside surface of the stelo  1225 . These two parts may be sandwiched together by the attachment platform  1210 . The overall diameter of the features in this ‘sandwich’ may be a significant factor in determining the stability of the high heel shoe  1200 . 
     In some cases, plastics tend towards relieving such stresses over time. Thus, an extended nub may be provided on the stelo  1225  to momentarily interfere and ‘bump over’ a corresponding feature on the heel attachment  1245  (not shown). 
     Footbed  1205  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 13 . 
     The attachment platform  1210  may be an example of a heel platform including an interlocking portion. In some examples, the interlocking portion includes a puck coupled to the heel platform. Attachment platform  1210  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9, 10, 11, 13, 15, 17, and 22-24 . 
     Heel cap  1215  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 21 and 22 . The shoe sole element  1220  may be an example of a flexible sole element interposed between the toe box platform and the heel platform. Shoe sole element  1220  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10, 11, 13, 15, and 22-24 . 
     The stelo  1225  may include a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo  1225  receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo  1225  is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element. 
     In some examples, the toe interlock includes a notch configured to interlock with the forefoot pin  1230  at the stelo  1225  receiver. In some examples, the stelo  1225  is interposed between the removeable heel and the interlocking portion. In some examples, the stelo  1225  includes a leading edge rib configured to engage the interlocking portion. In some examples, the stelo  1225  has a lateral curved profile. In some examples, the stelo  1225  includes a post coaxial with an axis of rotation of the removable heel, wherein the removable heel includes a cylindrical cavity configured to receive the post. In some examples, the stelo  1225  includes the post, wherein the post includes a compressible distal end. In some examples, the stelo  1225  includes a recurve, e.g., an “S” shape. Stelo  1225  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 13, 14, 16, and 22-24 . 
     Forefoot pin  1230  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 13 . The toebox base  1235  may be an example of a toe box platform including a stelo  1225  receiver. In some examples, the stelo receiver includes a forefoot pin  1230  oriented laterally at a proximal portion of the toe box platform. 
     Toebox base  1235  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 9, 10, 11, 13, and 14 . Heel lock  1240  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 15, 18, 19, 20, and 22 . 
     The heel attachment  1245  may be an example of a removable heel removably coupleable to the heel platform at the interlocking portion. In some examples, the stelo  1225  and the removable heel are configured to remain together upon removal of the removable heel from the interlocking portion. In some examples, the removable heel is configured to release from the interlocking portion by rotating the removable heel by at least fifteen degrees. Heel attachment  1245  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 14, 18, 19, and 22-24 . 
     Heel rod  1250  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 19 . Heel tip  1255  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 14, 18, and 19 . 
     Table 1, below, summarizes ranges and specifications for one example of a high heel shoe in accordance with the present disclosure. 
     
       
         
           
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                 Lower 
                 Upper 
               
               
                 Parameter 
                 Description 
                 Threshold 
                 Threshold 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 F-twist 
                 Highest twisting force 
                 0.3 
                 Nm 
                 1.3 
                 Nm 
               
               
                   
                 (moment) encountered 
               
               
                   
                 during heel release and 
               
               
                   
                 install 
               
               
                 Θ-stelo 
                 Nominal angle of release 
                 15 
                 degrees 
                 90 
                 degrees 
               
               
                   
                 (and install angle) of the 
               
               
                   
                 stelo from around 
               
               
                   
                 forefoot pin 
               
            
           
           
               
               
               
               
            
               
                 F-hs 
                 Force required to 
                  2N 
                 25N 
               
               
                   
                 separate heel and stelo 
               
               
                 F-ci 
                 Force required to install 
                 40N 
                 120N  
               
               
                   
                 the heel cap 
               
               
                 F-co 
                 Force required at leading 
                 10N 
                 70N 
               
               
                   
                 edge to remove heel cap 
               
               
                   
                 (note that Shank may be 
               
               
                   
                 used to pry out Heel Cap) 
               
            
           
           
               
               
               
               
               
            
               
                 K-sB 
                 Bending stiffness of the 
                 600 
                 kNmm 2   
                 No upper limit 
               
               
                   
                 stelo 
               
               
                   
               
            
           
         
       
     
       FIG. 13  shows an example of a side view of a high heel shoe base  1300  in accordance with aspects of the present disclosure. Hih heel shoe base  1300  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 14, and 15 . High heel shoe base  1300  may include footbed  1305 , attachment platform  1310 , shoe sole element  1315 , stelo  1320 , forefoot pin  1325 , and toebox base  1330 . 
     Footbed  1305  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 12 . Attachment platform  1310  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9-12, 15, 17, and 22-24 . 
     Shoe sole element  1315  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10-12, 15, and 22-24 . 
     Stelo  1320  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 12, 14, 16, and 22-24 . Forefoot pin  1325  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 12 . Toebox base  1330  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 9-12, and 14 . 
       FIG. 14  shows an example of a bottom view of a high heel shoe base  1400  in accordance with aspects of the present disclosure. High heel shoe base  1400  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 13, and 15 . High heel shoe base  1400  may include stelo  1405 , toebox base  1410 , heel attachment  1415 , and heel tip  1420 . 
     Stelo  1405  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 12, 13, 16, and 22-24 . Toebox base  1410  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-6, 9-12, and 13 . 
     Heel attachment  1415  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 12, 18, 19, and 22-24 . Heel tip  1420  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 18, and 19 . 
       FIG. 15  shows an example of a back view cross section of the back of a high heel shoe base  1500  in accordance with aspects of the present disclosure. High heel shoe base  1500  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 13, and 14 . High heel shoe base  1500  may include attachment platform  1505 , shoe sole element  1510 , and heel lock  1515 . 
     Attachment platform  1505  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9-13, 17, and 22-24 . Shoe sole element  1510  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10-13, and 22-24 . Heel lock  1515  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 18, 19, 20, and 22 . 
       FIG. 16  shows an example of a side view of a stelo  1600  in accordance with aspects of the present disclosure. Stelo  1600  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 12-14, and 22-24 . 
     The stelo  1600  may include a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo  1600  receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo  1600  is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element. 
     In some examples, the toe interlock includes a notch  1602  configured to interlock with the forefoot pin at the stelo  1600  receiver. In some examples, the stelo  1600  is interposed between the removeable heel and the interlocking portion at the opposite end of the stelo from the notch  1602 . In some examples, the stelo  1600  includes a leading edge rib  1604  configured to engage the interlocking portion. In some examples, the stelo  1600  has a lateral curved profile. In some examples, the stelo  1600  includes a post  1606  (or pin) coaxial with an axis of rotation of the removable heel, wherein the removable heel includes a cylindrical cavity configured to receive the post. In some examples, the stelo  1600  includes the post  1606 , wherein the post includes a compressible distal end. In some examples, the stelo  1600  includes a recurve. 
       FIG. 17  shows an example of an attachment platform  1700  in accordance with aspects of the present disclosure. The attachment platform  1700  may be an example of a heel platform including an interlocking portion. 
     In some examples, the interlocking portion includes a puck coupled to the heel platform. Attachment platform  1700  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9-13, 15, and 22-24 . 
     The attachment platform, in accordance with the present example, includes the female half of a quarter turn cam lock fastener. A cylindrical opening in the attachment platform includes a pair of notches (of greater diameter than the cylindrical opening) that allow a pair of “ears” on a post of a male half of the quarter turn cam lock fastener. 
     In operation, once the post is inserted into the cylindrical opening, with the ears aligned with the notches, the heel is rotated a quarter turn, misaligning the ears, so that the post can no longer be removed from the cylindrical opening. At the same time, camming surfaces on the bottom surface of the ears cause the heel to be drawn tightly toward the attachment platform, so as to increase stability of the heel relative to the attachment platform, and to increase the force required to overcome friction to rotate the heel into a position where it can be removed (i.e., where the ears are aligned with the notches and the post can be removed from the cylindrical opening). As the heel is drawn tightly toward the attachment platform, the stelo is also secured between the heel and the attachment platform. 
       FIG. 18  shows an example of a front view of a removable heel attachment  1805  in accordance with aspects of the present disclosure. The example shown includes heel lock  1800 , heel attachment  1805 , and heel tip  1810 . 
     Heel lock  1800  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 15, 19, 20, and 22 . Heel attachment  1805  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 12, 14, 19, and 22-24 . Heel tip  1810  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 14, and 19 . 
       FIG. 19  shows an example of a side view of a removable heel attachment  1905  in accordance with aspects of the present disclosure. The example shown includes heel lock  1900 , heel attachment  1905 , heel rod  1910 , and heel tip  1915 . 
     Heel lock  1900  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 15, 18, 20, and 22 . Heel attachment  1905  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 12, 14, 18, and 22-24 . 
     Heel rod  1910  may be an example of, or include aspects of, the corresponding element described with reference to  FIG. 12 . Heel tip  1915  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 14, and 18 . 
       FIG. 20  shows an example of a heel lock  2000  in accordance with aspects of the present disclosure. Heel lock  2000  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 15, 18, 19, and 22 . 
       FIG. 21  shows an example of a heel cap  2100  in accordance with aspects of the present disclosure. Heel cap  2100  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12 and 22 . The heel cap  2100  may install in the heel platform when the heel lock is removed. In accordance with the present document, the heel cap  2100  is held in place by friction, and prevents debris, such as dirt and rocks, from damaging or clogging the heel platform when the shoe is used with the heel and stelo removed. 
       FIG. 22  shows an example of a side view cross section of the back of a high heel shoe base in accordance with aspects of the present disclosure. The example shown includes attachment platform  2200 , heel cap  2205 , shoe sole element  2210 , stelo  2215 , heel lock  2220 , and heel attachment  2225 . 
     Attachment platform  2200  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9-13, 15, 17, 23, and 24 . Heel cap  2205  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12 and 21 . 
     Shoe sole element  2210  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10-13, 15, 23, and 24 . Stelo  2215  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 12-14, 16, 23, and 24 . 
     Heel lock  2220  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 12, 15, 18, 19, and 20 . Heel attachment  2225  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 12, 14, 18, 19, 23, and 24 . 
     The stelo  2215  is shown interlocking with the heel lock  2220 , and the heel lock  2220  is shown interlocking with the attachment platform  2200 . 
       FIG. 23  shows an example of a high heel shoe heel connection mechanism in accordance with aspects of the present disclosure. The example shown includes shoe sole element  2300 , attachment platform  2305 , stelo  2310 , and heel attachment  2315 . 
     This example illustrates an example heel connection mechanism that may provide a larger heel/mid-sole connection area. This embodiment does not rely on the shoe sole element  2300  for the connection, and may thus be easy to clean, strong and durable. In another similar embodiment (not shown), a heel lock has narrow tabs, more like a T-shape and less like wings. The heel lock extends up from the heel and passes through the stelo  2310 . This embodiment may rely on the compression of the shoe sole element to maintain stability and strength. 
     Shoe sole element  2300  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10-13, 15, 22, and 24 . Attachment platform  2305  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9-13, 15, 17, 22, and 24 . 
     Stelo  2310  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 12-14, 16, 22, and 24 . Heel attachment  2315  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 12, 14, 18, 19, 22, and 24 . 
       FIG. 24  shows an example of a high heel shoe heel connection mechanism in accordance with aspects of the present disclosure. The example shown includes shoe sole element  2400 , attachment platform  2405 , stelo  2410 , and heel attachment  2415 . 
     This example illustrates an example of a simplified heel connection mechanism where the heel attachment  2415  platform  2405  and stelo  2410  may be removed or installed as a single unit. This embodiment enables heel wear to be hidden within the design, and may eliminate the need for a heel cap. The fasteners on the stelo  2410  may use a cam-lock style action to hold together. They are installed with a push and removed with a pull. In some examples, the fasteners on the stelo  2410  are unable to release until an inner cylinder on the heel attachment  2415  is pulled out. 
     Shoe sole element  2400  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 10-13, 15, 22, and 23 . Attachment platform  2405  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-7, 9-13, 15, 17, 22, and 23 . 
     Stelo  2410  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-9, 12-14, 16, 22, and 23 . Heel attachment  2415  may be an example of, or include aspects of, the corresponding element described with reference to  FIGS. 1-5, 9, 12, 14, 18, 19, 22, and 23 . 
     The post of the stelo  2410 , described above, includes a cylindrical core with a compressible, expandable distal end. When the stelo is inserted in the the attachment mechanism, the compressible, expandable distal end frictionally engages with the attachment mechanism  2405 . Additional travel allows the distal end to expand back to its relaxed state. When a cylindrical portion of the heel lock of the embodiment of  FIG. 24  is inserted into the stelo, through the cylindrical core, the compressible, expandable distal end is prevented from compressing, thereby mechanically locking the heel lock and stelo assembly into a region of greater diameter within the attachment mechanism, thereby locking the stelo to the attachment mechanism. 
       FIG. 25  shows an example of a process for producing a shoe in accordance with aspects of the present disclosure. In some examples, these operations may be performed manually, by machine, or by an automated process controlled by a processor executing a set of codes to control functional elements of an apparatus. Additionally or alternatively, the processes may be performed using special-purpose hardware. Generally, these operations may be performed according to the methods and processes described in accordance with aspects of the present disclosure. For example, the operations may be composed of various substeps, or may be performed in conjunction with other operations described herein. 
     At step  2500 , a system may provide a toe box platform including a stelo receiver. In some cases, the operations of this step may refer to a toebox base as described with reference to  FIGS. 1-6, 9-13, and 14 . 
     At step  2505 , a system may provide a heel platform including an interlocking portion. In some cases, the operations of this step may refer to an attachment platform as described with reference to  FIGS. 1-7, 9-13, 15, 17, and 22-24 . 
     At step  2510 , a system may provide a flexible sole element interposed between the toe box platform and the heel platform. In some cases, the operations of this step may refer to a shoe sole element as described with reference to  FIGS. 1-5, 10-13, 15, and 22-24 . 
     At step  2515 , a system may provide a stelo including a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element. In some cases, the operations of this step may refer to a stelo as described with reference to  FIGS. 1-9, 12-14, 16, and 22-24 . 
     At step  2520 , a system may provide a removable heel removably coupleable to the heel platform at the interlocking portion. In some cases, the operations of this step may refer to a heel attachment as described with reference to  FIGS. 1-5, 9, 12, 14, 18, 19, and 22-24 . 
       FIG. 26  shows an example of a process for transforming a high heel shoe to a low heel shoe in accordance with aspects of the present disclosure. Generally, these operations may be performed according to the methods and processes described in accordance with aspects of the present disclosure. For example, the operations may be composed of various substeps, or may be performed in conjunction with other operations described herein. 
     At step  2600 , a system may retain a toe box platform including a stelo receiver. In some cases, the operations of this step may refer to a toebox base as described with reference to  FIGS. 1-6, 9-13, and 14 . 
     At step  2605 , a system may retain a heel platform including an interlocking portion. In some cases, the operations of this step may refer to an attachment platform as described with reference to  FIGS. 1-7, 9-13, 15, 17, and 22-24 . 
     At step  2610 , a system may retain a flexible sole element interposed between the toe box platform and the heel platform. In some cases, the operations of this step may refer to a shoe sole element as described with reference to  FIGS. 1-5, 10-13, 15, and 22-24 . 
     At step  2615 , a system may remove a stelo including a rigid shank, a toe interlock, and a heel interlock, wherein the toe interlock is configured to removably interlock with the stelo receiver, and the heel interlock is configured to removably interlock with the interlocking portion, and wherein the stelo is configured to juxtapose with the flexible sole element providing a rigid support to the flexible sole element. In some cases, the operations of this step may refer to a stelo as described with reference to  FIGS. 1-9, 12-14, 16, and 22-24 . 
     At step  2620 , a system may remove a heel from the heel platform at the interlocking portion. In some cases, the operations of this step may refer to a heel attachment as described with reference to  FIGS. 1-5, 9, 12, 14, 18, 19, and 22-24 . 
     While the invention herein disclosed has been described by means of specific embodiments, examples and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.