Insole for heel pain relief

• US 5,611,153 A
• Filed: 02/17/1995
• Issued: 03/18/1997
• Est. Priority Date: 05/12/1994
• Status: Expired due to Term

• Current Assignee: MSD CONSUMER PRODUCTS Incorporated (Merck & Co., Inc.)
• Original Assignee: Schering-Plough Healthcare Products Incorporated (Merck & Co., Inc.)
• Inventors: Thompson, Donald B., Fisher, Randall K.
• Primary Examiner(s): Patterson, Marie D.
• Application Number:
  US08/390,159
• Time in Patent Office: 760 Days
• Field of Search: 36/43, 36/44, 36/145, 36/154, 36/173, 36/174, 36/178, 36/180, 36/181, 36/71, 36/80
• US Class Current: 36/43
• CPC Class Codes: A43B 13/38 Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
• CPC Class Codes: A43B 7/14 with foot-supporting parts
• CPC Class Codes: A43B 7/141 having an anatomical or curved form
• CPC Class Codes: A43B 7/142 situated under the medial arch, i.e. under the navicular or cuneiform bones
• CPC Class Codes: A43B 7/1425 situated under the ball of the foot, i.e. the joint between the first metatarsal and first phalange
• CPC Class Codes: A43B 7/143 situated under the lateral arch, i.e. the cuboid bone
• CPC Class Codes: A43B 7/1435 situated under the joint between the fifth phalange and the fifth metatarsal bone
• CPC Class Codes: A43B 7/144 situated under the heel, i.e. the calcaneus bone
• CPC Class Codes: A43B 7/1445 situated under the midfoot, i.e. the second, third or fourth metatarsal

Abstract

An insole and a method for relieving bottom-of-heel pain (ie. plantar heel pain) and/or arch pain associated with bottom-of-heel pain is described.

Claims

1. A removable insole for relieving bottom-of-heel pain and/or arch pain associated with bottom-of-heel pain comprising:

a flexible, shock-absorbing, compressible material having a front portion with a forward edge, a cupped heel portion and a broad, raised arch portion having a maximum height at the medial edge of said insole;

wherein

said front portion tapers downward from said raised arch portion toward a first minimum thickness on a line positioned behind the metatarsal heads of a foot when the insole is in place in a shoe;

said cupped heel portion is posted medially from about 1 to about 4 degrees so that the medial bottom side of said cupped portion is thicker than the lateral bottom side of said cupped portion;

said insole has a substantially upright wall portion which extends arcuately around said cupped heel portion, wherein starting at the heel end, said wall portion gradually slopes inward on the medial side to a point approximately one-third across the width of the insole, and continues forward while reducing in height along said medial edge to undercut said arch portion and allow a close fit of the undercut arch portion with the arch portion of a shoe, wherein on the lateral side of said insole, said upright wall portion reduces in height from said cupped heel portion to said first minimum thickness in the front portion;

said broad, raised arch portion gradually slopes downward from said maximum point to said first minimum thickness located on a line behind the metatarsal heads, to a second minimum thickness located at about 55 to about 90 percent across the width of said insole from said maximum, raised arch portion and to a third minimum thickness located within said cupped heel portion, wherein said cupped heel portion is thicker than said front portion.

2. The insole of claim 1 wherein said shock-absorbing material is made of polyurethane.

3. The insole of claim 1 wherein the forward edge of said forward portion is disposed behind the metatarsal heads of a foot.

4. The insole of claim 1 wherein said forward portion is disposed in front of said metatarsal heads.

5. The insole of claim 1 wherein said cupped heel portion is medially posted about 1 degree.

6. The insole of claim 1 wherein said cupped heel portion is medially posted between about 2 to 3 degrees.

7. The insole of claim 1 wherein said lateral side begins to substantially decrease in height at a point across the width from said maximum, raised medially arch point to said first mininum thickness in the front portion.

8. The insole of claim 1 wherein said broad, raised medial arch portion gradually decreases to said third minimum thickness located at about 65 to about 85 percent across the width of said insole from said maximum, raised medial arch portion.

9. The insole of claim 1 wherein said broad, raised medial arch portion gradually decreases to said second minimum thickness located at about 75 to about 80 percent across the width of said insole from said maximum, raised medial arch portion.

10. The insole of claim 1 further comprising a topcover bonded to the outer surface of said forward portion, said cupped heel portion and said broad, raised arch portion.

11. The insole of claim 10 wherein the topcover is a fabric.

12. The insole of claim 11 wherein the topcover is a urethane knit laminate.

13. The insole of claim 1 having perforations extending from the top surface to the bottom surface.

14. The insole of claim 1 wherein the bottom surface is flat.

15. The insole of claim 14 wherein the non-slip coating is a double-sided pressure sensitive adhesive tape.

16. The insole of claim 1 wherein the non-slip coating is attached to the bottom surface to reduce movement of the insole within the shoe.

17. The insole of claim 1 which is multilayered.

18. The insole of claim 1 further comprising a small lateral arch portion which leads into the second minimum thickness from the lateral side.

19. The insole of claim 1 which is three-quarters length and extends from the heel to approximately the first metatarsals of the foot.

20. The insole of claim 1 which is full length and extends along the entire length of the foot.

21. A method for relieving bottom-of-heel pain, arch pain associated with bottom-of-heel pain or both types of pain comprising wearing in one'"'"'s shoes, an insole comprising:

a flexible, shock-absorbing, compressible material, having a front portion with a forward edge, a cupped heel portion and a broad, raised arch portion having a maximum height at the medial edge of said insole;

wherein

said front portion tapers downward from said raised arch portion toward a first minimum thickness on a line positioned behind the metatarsal heads of a foot when the insole is in place in a shoe;

said cupped heel portion is posted medially from about 1 to about 4 degrees so that the medial bottom side of said cupped portion is thicker than the lateral bottom side of said cupped portion;

said insole has a substantially upright wall portion which extends arcuately around said cupped heel portion, wherein starting at the heel end, said wall portion gradually slopes inward on the medial side to a point approximately one-third across the width of the insole, and continues forward while reducing in height along said medial edge to undercut said arch portion and allow a close fit of the undercut arch portion with the arch portion of a shoe, wherein on the lateral side of said insole, said upright wall portion reduces in height from said cupped heel portion to said first minimum thickness in the front portion;

said broad, raised arch portion gradually slopes downward from said maximum point to said first minimum thickness located on a line behind the metatarsal heads, to a second minimum thickness located at about 55 to about 90 percent across the width of said insole from said maximum, raised arch portion and to a third minimum thickness located within said cupped heel portion, wherein said cupped heel portion is thicker than said front portion.