Footwear having an enclosed and articulated toe

• US 20050060914A1
• Filed: 07/22/2004
• Published: 03/24/2005
• Est. Priority Date: 07/22/2003
• Status: Active Grant

• Current Assignee: Keen LLC
• Original Assignee: Keen LLC
• Inventors: Fuerst, Rory W.
• Granted Patent: US 7,513,064 B2
• Time in Patent Office: Days
• US Class Current: 36/102
• CPC Class Codes: A43B 1/14 made of plastics A43B1/028 takes precedence
• CPC Class Codes: A43B 13/141 with a part of the sole being flexible, e.g. permitting articulation or torsion
• CPC Class Codes: A43B 13/226 the profile being made in the foot facing surface
• CPC Class Codes: A43B 3/108 characterised by the sole
• CPC Class Codes: A43B 3/128 characterised by the sole
• CPC Class Codes: A43B 7/141 having an anatomical or curved form
• CPC Class Codes: B29D 35/0009 by injection moulding; Apparatus therefor
• CPC Class Codes: B29D 35/122 Soles

Abstract

Articles of footwear having an enclosed articulated toe portion, including a molded midsole with an integrally-molded toe cap shaped to receive a foot therein and to enclose the toes of the foot. The toe cap terminates at a position adjacent to the base of the toes of the foot. The articles additionally include an outsole affixed to the bottom of the midsole and an upper which in some embodiments is co-molded with the midsole and toe cap.

Claims

1. An article of footwear for a wearer having a one piece molded midsole having a top surface adjacent to the sole of the wearer'"'"'s foot and a bottom surface adjacent to the ground when in use, said midsole extending from a rear end at the wearer'"'"'s heel to a front end beyond the tips of the wearer'"'"'s toes,

said midsole having co-molded therewith an integral toe cap extending from the front end of the midsole back over the wearer'"'"'s toes and terminating in a rear edge at a position adjacent to the base of the wearer'"'"'s toes and said midsole being capable of flexing along a midsole flex line substantially aligned with the rear edge of the toe cap,

the integral toe cap and the portion of the midsole with which it is associated defining a toe section of the article of footwear which is articulated from the remainder of the article of footwear along the midsole flex line,

a frictional surface between the body of the molded midsole and the sole of the wearer'"'"'s foot and an outsole adhered to the midsole bottom surface.

2. The article of footwear of claim 1, wherein the top surface of the midsole is textured to provide the frictional surface.

3. The article of footwear of claim 1 additionally comprising an insole intermediate the top surface of the midsole and the sole of the wearer'"'"'s foot providing the frictional surface.

4. The article of footwear of claim 1 additionally comprising an upper joined to the midsole to affix the article of footwear to the wearer'"'"'s foot.

5. The article of footwear of claim 4 wherein the upper is co-molded with the midsole.

6. The article of footwear of claim 4 wherein the upper comprises a harness.

7. The article of footwear of claim 6 wherein the harness is laced.

8. The article of footwear of claim 4 wherein the upper has a front edge, with the toe cap rear edge and the upper front edge being separated from one another by a transverse slot passing across the midsole at a position adjacent to the base of the wearer'"'"'s toes.

9. The article of footwear of claim 1 wherein the frictional surface contains anatomical contours to mate with the shape of the wearer'"'"'s foot.

10. The article of footwear of claim 8 wherein the frictional surface contains anatomical contours to mate with the shape of the wearer'"'"'s foot.

11. The article of footwear of claim 10 wherein the anatomical contours comprise a raised transverse ridge located under the transverse slot.

12. The article of footwear of claim 4 wherein the article is a sandal.

13. The article of footwear of claim 4 wherein the article is a shoe.

14. The article of footwear of claim 4 wherein the article is a clog.

15. The article of footwear of claim 5 wherein the molded midsole and toe cap are injection co-molded.

16. The article of footwear of claim 15 wherein the midsole and the toe cap are co-molded of the same moldable plastic.

17. The article of footwear of claim 16 wherein the plastic comprises polyurethane.

18. The article of footwear of claim 16 wherein the plastic comprises ethylene vinyl acetate.

19. The article of footwear of claim 5 wherein the molded midsole, toe cap and upper are injection co-molded.

20. The article of footwear of claim 19 wherein the midsole and the toe cap are co-molded of the same moldable plastic.

21. The article of footwear of claim 20 wherein the plastic comprises polyurethane.

22. The article of footwear of claim 20 wherein the plastic comprises ethylene vinyl acetate.

23. The article of footwear of claim 8, wherein the outsole comprises:

a first portion attached forward of the transverse slot; and

a second portion attached rearward of the transverse slot.

24. The article of footwear of claim 23, wherein the second portion of the outsole is made of a longer wearing material than the first portion of the outsole.

25. The article of footwear of claim 23, wherein the first and second portions are separate from one another.

26. The article of footwear of claim 23, wherein the first and second portions are linked together.

27. The article of footwear of claim 23, wherein the outsole further comprises:

a third portion attached rearward of the second portion.

28. The article of footwear of claim 13, wherein the third portion of the rubber sole is made of a longer wearing rubber than the first or second portions of the outsole.

29. The article of footwear of claim 1, wherein the outsole is cemented to the bottom of the midsole.

30. The article of footwear of claim 29, wherein the outsole is compression molded.

31. The article of footwear of claim 29, wherein the outsole is blow molded.

32. The article of footwear of claim 29, wherein the outsole is made of solid rubber.

33. The article of footwear of claim 29 wherein the outsole is made of blown rubber.