Title:
Sandals and method for making same
United States Patent 3928927


Abstract:
A foot sandal, and method for making same, the sandal having a platform with slits at each end, strapping members mounted with the platform for securing the platform to the foot and securing members mounted in the slits for securing the strapping members with the platform, the slits being closed after the insertion of the securing members.



Inventors:
Brown, Dwight Collin (Houston, TX)
Brown, Kevin Bruce (Houston, TX)
Application Number:
05/526466
Publication Date:
12/30/1975
Filing Date:
11/25/1974
Assignee:
BROWN; DWIGHT COLLIN
BROWN; KEVIN BRUCE
Primary Class:
Other Classes:
12/142S
International Classes:
A43B3/12; (IPC1-7): A43B3/12; A43D9/00
Field of Search:
36/11.5,3R 12
View Patent Images:
US Patent References:
3404469Hygienic aid1968-10-08Prenovitz
2761224Shoe with hollow welt for detachable upper1956-09-04Gardiner
2669036Flexible footwear1954-02-16Israel



Primary Examiner:
Lawson, Patrick D.
Attorney, Agent or Firm:
Pravel & Wilson
Claims:
We claim

1. A sandal adapted to be worn on the foot comprising:

2. The sandal of claim 1 wherein said strap means includes:

3. The sandal of claim 2, wherein said toe strap means includes:

4. The sandal of claim 3, wherein:

5. The sandal of claim 3, wherein said instep strap means includes:

6. The sandal of claim 5 wherein:

7. The sandal of claim 6, wherein:

8. The sandal of claim 5, wherein said heel strap means includes:

9. The sandal of claim 8, wherein:

10. The sandal of claim 1, wherein said securing means includes:

11. The sandal of claim 1, wherein:

12. A method for making sandals, comprising the steps of:

13. The method of claim 12, wherein said mounting further includes the step of:

14. The method of claim 13, wherein said mounting further includes the step of:

15. The method of claim 12, wherein said securing further includes the step of:

16. The method of claim 12, wherein said mounting includes the steps of:

17. The method of claim 16, wherein said mounting further includes the steps of:

Description:
BACKGROUND OF THE INVENTION

The field of this invention is footwear, particularly of the type relating to sandals and methods for making same.

Prior art sandals includes those such as disclosed in U.S. Pat. Nos. 3,352,033; 2,669,036 and 2,239,471.

Some of the difficulties encountered in sandals generally include straps that may become easily detached from the sole of the shoe because of inadequate securing members, sandals that are not resistant to water, and straps that may potentially cause chaffing and/or binding against the foot.

SUMMARY OF THE INVENTION

The present invention provides a new and improved sandal, and method for making same, the sandal having a platform conforming substantially to the shape of the sole of the foot and being slit from each end, strap means mounted with the platform for securing the platform to the foot and securing means mounted in the slits with the straps for securing the straps with the platform, the slits being closed after the insertion of the securing means.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an oblique view of the sandals of the present invention as completely assembled;

FIG. 2 is an exploded, isometric view of a sandal of the present invention;

FIG. 3 is a side view of a partially assembled sandal of the present invention;

FIG. 4 is a side view of the sandal of the present invention, completely assembled, as fitted to a foot; and

FIG. 5 is a plan view of the sandal of the present invention taken along lines 5--5 of FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT

In the drawings, the letter S designates the sandal of the present invention. The sandal S includes a platform P having strap means A mounted with the platform P and securing means B for securing the strap means A with the platform P.

The sandal S includes a platform P preferably of a vinyl foam such as that marketed under the name of "Uniroyal Ensolite," however, other materials may be used. Preferably, the platform P is of an approximate thickness of one inch but it is intended that the platform P not be limited only to thicknesses of one inch but also to include thicknesses both greater and lesser than such thickness.

The platform P is formed to conform substantially with the shape of the sole of the foot F as is platform 10. The platform 10 has an upper surface 10a and a lower surface 10b. The platform 10 further has a toe end 10c adjacent the toes 11 of a foot F and a heel end 10d adjacent the heel 13 of the foot F. A slit 12 is formed substantially parallel to the upper surface 10a and lower surface 10b of the platform 10. The slit 12 includes an upper surface 12a and a lower surface 12b which are formed when the platform 10 is slit, the slit 12 originating at point 12c and terminating at line 12d where upper and lower surfaces 12a, 12b join. Preferably, the slit 12 extends along the length from toe end 10c toward heel end 10d of the platform 10 such that the line 12d is adjacent the ball 15 of the foot F.

In similar fashion, a heel slit 14 adjacent the heel end 10d and heel 13 of the foot F is formed substantially parallel to the upper surface 10a and lower surface 10b of the platform 10 having an upper surface 14a and a lower surface 14b which are formed when the heel end 10d of the platform 10 is initially slit adjacent point 14c and extends to termination line 14d wherein heel slit 14 terminates. Preferably, the slit 14 extends along the length from the toe end 10c toward the heel end 10d of the platform P such that the line 14d is adjacent the arch of the foot F.

Opening 16 is formed in the platform 10 adjacent the toe end 10c extending from the upper surface 12b of slit 12 upwardly to the upper surface 10a of the platform 10. Openings 18 and 20 are formed adjacent the heel end 10d of the platform 10 such that each respectively originates at the upper surface 14a of the slit 14 and extends upwardly unto the upper surface 10a of the platform 10. Preferably, the openings 18, 20 are equal distance from the longitudinal axis 9 (FIG. 5) of the platform 10 and transverse thereto as viewed from a plan view thereof, as shown in FIG. 5. Furthermore, the openings 18, 20 should be located on the platform 10 adjacent to where the arch 17 and heel 13 of the foot F join.

The platform P of the sandal S of the present invention is secured to the foot F by the strap means A and securing means B therewith. The strap means A includes a toe strap means 20, instep strap means 21, and heel strap means 22. The toe strap means 20 includes cord 23 and tubing 26 to be located adjacent the toes 11 of the foot F. The instep strap means 21 includes cord 24 and tubing 28 to be located adjacent the instep 19 of the foot F. The heel strap means 22 includes tubing 30 and tubing pegs 40, 42 to be located adjacent the heel 13 of the foot F. The tubing pegs 40, 42 are preferably formed of a polyethylene hollow tubing and having openings 40a, 42a formed therewith and adapted to be slidably mounted with cord 24. The strap means A includes cord 23, 24 and a protective cushioned covering or tubing 26, 28, 30, 32, 34. Of course, all cords and tubing must be proportioned according to foot size just as the platform P is so proportioned.

The strap means A includes cords 23, 24 that are preferably made of nylon. The tubing 26, 28, 30, 32, 34, may be of any material that is soft and preferably waterproof and is preferably of a latex surgical tubing.

The securing means B includes toe plate 36 having an aperture 36a formed therein and heel plate 38 having apertures 38a, 38b formed therein. Preferably, the toe plate 36 is formed of a metal washer or any other suitable material. The heel plate 38 is preferably formed of a polyethylene or any other suitable material.

In practicing the method of this invention, the platform 10 is formed conforming to the shape of the sole of the foot F. Toe slit 12 and heel slit 14 are formed with the platform 10 such that they preferably extend from points 12c, 14c to lines 12d, 14d, respectively. The toe strap means 20 is then mounted with the platform 10. This encompasses folding cord 23 in half and knotting the same at point 23a forming a substantially circular configuration. The thus knotted cord 23 is then threaded through aperture 36a of the toe plate 36 and upwardly through opening 16 formed in platform 10 adjacent toe end 10c. The cord 23 is pulled snugly such that the toe plate 36 abuts upper surface 12a of slit 12. Tubing 26 is thereafter threaded over the cord 23 leaving an exposed loop 23b at the upper end thereof.

Cord 24 is threaded through tubing 28 with this assembly being threaded through loop 23b. Tubing pegs 40, 42 are threaded onto each end 24a, 24b of the cord 24 through openings 40a, 42a, formed therein pegs 40, 42, respectively. Tubing 32, 34 is thereafter threaded onto the cord 24. The ends 24a, 24b are thereafter threaded through openings 18, 19 formed adjacent the heel end 10d of the platform 10. The ends 24a, 24b extend through the openings 18, 19, respectively, and out from the upper surface 14a of slit 14. Thereafter, the ends 24a, 24b are threaded through apertures 38a, 38b formed in the heel plate 38 whereinafter the ends 24a, 24b are tied in an appropriate square knot 44. Preferably, the heel plate 38 should be located in the heel slit 14 just behind the relative position of the arch 17 of the foot F.

Using any type of holding means, such as contact cement or any other suitable substitute therefor, such as brads and/or the like, the toe slit 12 and heel slit 14 are closed and/or adhesively bonded together. Thereafter, a suitable length of tubing 30 may be affixed to pegs 40, 42 adjacent ends 40b, 42b, respectively. Of course, either of these two steps may be reversed without affecting the assembly of the sandal S. Any refinement and/or finishing of the platform 10 is accomplished by any suitable machining process such as use of a belt and/or disc sander.

Thus, a sandal S of the present invention is formed having a toe strap means 20 adapted to be mounted between the big toe and first toe of the foot F for correctly locating the toes 11 of the foot F on toe end 10c of the platform 10. The instep strap means 21 secures the sandal S with the instep 19 of the foot F. The heel strap means 22 helps to further secure the sandal S to the heel 13 of the foot F. It will be appreciated that the heel strap means 22 is adjustable in that the tubing 30 frictionally engages the pegs 40, 42 and by merely adjusting the relative position of the tubing 30 on the pegs 40, 42 the heel strap means 22 is adjustably positionable to tighten or loosen the heel strap means 22 with respect to the heel of the foot F. Furthermore, by adjusting the respective lengths of tubing 32, 34 and tubing 28 accordingly, a further heel strap adjustment is manifest.

The securing means B prevents the toe strap means 20 and the heel strap means 22 from pulling through and from the platform 10 when the sandal S is worn by foot F. The plates 36, 38 help to distribute pressure exerted by the foot F through cords 23, 24, respectively, over the area of the respective plates 36, 38, thus reducing the risk of pulling the cords 23, 24 therefrom.

Inasmuch as the sandal S of the present invention is preferably constructed of vinyl foam, nylon cord, latex surgical tubing, and various polyethylene parts the sandal S of the present invention results in an extremely lightweight, waterproof sandal S. Furthermore, although the platform P initially is of a substantially flat configuration on the upper surface 10a and lower surface 10b, after a short period of use, the upper surface 10a of the platform tends to compress in the areas adjacent to the heel 13 and ball 15 of the foot F since the bulk of the weight of an individual is carried on these key points of the foot F. Thus, the upper surface 10a conforms to the elevational configuration of the sole of foot F after a short period of use resulting in an extremely comfortable sandal S. Still further, the protective cushioned covering or tubing 26, 28, 30, 32, 34 prevents chaffing of the cords 23, 24 against the toe 11, instep 19 and/or heel 13 of the foot F when wearing the sandal S of the present invention.

The foregoing disclosure and description of the invention are illustrative and explanatory thereof, and various changes in the size, shape, and materials as well as in the details of the illustrated construction may be made without departing from the spirit of the invention.