Abstract:
Disclosed here is a novelly designed sandal whose vamp or sole can be changed. If there are many so designed vamps and soles, then many times new sandals can be composed by the interchange among the vamps and soles. For example, 5 different pairs of vamps and 2 different pairs of soles, then 10 different pairs of sandals can be made. The sandal can also be further changed by changing the binding, welt or side element with different color, type, etc.

Description:
BRIEF SUMMARY OF THE INVENTION 
     It relates to a new kind of sandal. It&#39;s vamp is inserted into the specially-made sole by L-shaped angles. The vamp can be firmly fastened up the sole as the binding, welt or side element is drawn tightly and fixed by two screws. The vamp can also be taken off and changed by another vamp when the binding, welt or side element is loosened. The above-mentioned vamp, sole and binding, welt or side element are invented by the applicant, Chin-Yuan Wang. 
    
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
     FIG. 1 is a schematic illustration depicting the structural parts of an embodiment of the present invention. 
     FIG. 2 is the front part of the vamp with the L-shaped angles. 
     FIG. 3 is the rear part of the vamp with the L-shaped angles. 
     FIG. 4 shows a different type of vamp whose front part and rear part are made in one piece. 
     FIG. 5 is a perspective view of an embodiment of the present invention showing the structural parts of the binding, welt or said element and the sole in details. 
     FIG. 6 is the top view of the sole showing the fastening-cuts, the angle-caves, block-cave and the protruded stripe on the sole. 
     FIG. 7 is a sectional view of FIG. 6, but with the shoelace on showing how the L-shaped angles functioned. 
     FIG. 7A shows the L-shaped angle assembly. 
     FIG. 7B is the enlarged view of one end of FIG. 7. 
     FIG. 8 shows the metal L-shaped angle being fastened up the leather vamp by some suitable means. 
     FIG. 9 shows the angle cave, the fastening-cut and the block-cave on the rear part of the sole. 
     FIG. 10 is showing how the shoelace contacting with the sole side. 
    
    
     DETAILED DESCRIPTION 
     The vamp 1, as shown in FIG. 1, can be any type as desired, but it is fastened on the sole 2 in a completely different way. As in the usual way, the vamp 1 is fastened on the sole 2 firmly and can not be separated from the sole 2 again unless it is destroyed. However in the present invention, an L-shaped angle 3 is applied. It can be made as one piece with the vamp 1 as the vamp 1 is made of plastic or the like. It can also be a metal angle and sewed on the vamp 1 as the vamp 1 is made of leather or the like, as shown in FIGS. 2, 3, 4 and 8. 
     The front part and rear part of the vamp 1 can be separately made as usual, as shown in FIGS. 2 and 3 respectively. Numeral 4 designates a usual shoe buckle, as shown in FIGS. 1 and 3. 
     The detailed design of a preferred embodiment of the present invention is shown in FIG. 5. A binding, welt or side element 5 around the shoe side is employed. The binding web, or side element 5 is suitable monolithic. The binding, welt or side element 5 has upper protruded stripe 6 and lower protruded stripe 7. There are several fasteners 8. In the embodiment as shown in FIG. 5, there are six fasteners along the upper protruded stripe 6 on the binding, welt or side element 5 and two fasteners on the lower stripe 7 on the binding, welt or side element 5. The two lower fasteners are thicker than the upper fasteners and are located at the position where the sole 2 is bent during walking. The shape of the circular fasteners 8 are used. There are cut-out fastening regions (fastening-cuts) 9 on the soles. The number, shape and position of the fastening-cuts 9 must match with those of the fasteners, as shown in FIG. 6. There are several angular indentations (angle cuts) 10 on the binding, welt or side element 5 designed for L-shaped angles on the vamp 1. 
     The thickness of the binding, welt or side element 5 at the front part of the sandal is bigger than that of the other parts of the binding, welt or side element 5, as designated by 11. It can keep the binding, welt or side element 5 fastened firmly around the sole 2 when it hits against some hard things, such as rocks, etc. 
     There is a protruded stripe 12 at the middle part of the sole side as shown in FIG. 10. The protruded stripes 6 and 7 on the binding, welt or side element 5 end at 13b, so the rear part of the binding, welt or side element can be easily bent. The protruded stripe 12 on the shoe side ends at 13a. When the protruded stripes 6, 7 and 12 are fastened up together, 13a and 13b can be met together, too. Since the distance between the upper and lower protruded stripes 6 and 7 on the binding, welt or side element 5 is equal to the height of the protruded stripe 12 on the sole side. 
     On the sole side there are several angle caves 14, which are designed for the L-shaped angles. So that the position, number and size of the angle-cuts 10 on the binding, welt or side element 5 and the angle caves 14 on the sole side be coincided with each other, as shown in FIG. 5. The binding, welt or side element 5, the L-shaped angle 3 and angle cave 14 are shown in details in FIG. 7, FIG. 7A (assembly) and FIG. 7B. 
     At both ends of the binding, welt or side element 5, a block shape end portion (block) 15 with a hole 16 at its center is prepared. At the rear end of the sole 2, there is another block-cave 17 for the blocks 15. There are two holes 18 through the block indentation (block-cave) 17 on the sole 2 to go with the other two holes 16 on both ends of the binding, welt or side element 5. The holes 18 are threaded when they reach the bottom of the block-cave 17, as shown in FIGS. 5 and 9. 
     After the L-shaped angles 3 on the vamp 1 are inserted into the angle-caves 14, then the vamp 1 now hooks the sole 2 firmly, the fasteners 8 can be put in the fastening-cuts 9, then the fasteners 8 are now in the fastened position. So the binding, welt or side element 5 can be further fastened by locking both ends of the binding, welt or side element 5 in the block-cave 17 by two screws 19 through the holes 16 and half-threaded holes 18, as shown in FIGS. 1 and 9. Now the vamp 1 of the sandal is firmly joined to the sole 2, so that the sandal is ready to wear. 
     The sandal, as shown in FIG. 1, can be completely changed to a new sandal by changing the shoelace 5 to another binding, welt or side element 5 with different colour, type, etc. and by changing the vamp with different colour, type, etc. as shown in FIG. 4. 
     The present invented sandal can be used in many different occasions, such as on a trip, the man (or lady) can carry a few different bindings, welts or side elements 5 and vamps 1, he can wear a pair of new sandals anytime only by changing the binding, welt or side element 5 and/or vamp 1 he (or she) carried. Since the volume of the binding, welt or side element 5 and vamp 1 after packed is very small, he (or she) can carry the binding, welt or side element 5 and vamps 1 as many as he (or she) desired.