US 12,302,983 B2
Sole for a shoe
Yo Kajiwara, Osaka (JP); and Shunsuke Tazawa, Osaka (JP)
Assigned to MIZUNO CORPORATION, Osaka (JP)
Filed by MIZUNO Corporation, Osaka (JP)
Filed on Nov. 16, 2023, as Appl. No. 18/511,544.
Claims priority of application No. 2022-185125 (JP), filed on Nov. 18, 2022.
Prior Publication US 2024/0164477 A1, May 23, 2024
Int. Cl. A43B 13/14 (2006.01); A43B 5/06 (2022.01); A43B 13/18 (2006.01)
CPC A43B 13/18 (2013.01) [A43B 5/06 (2013.01); A43B 13/14 (2013.01); A43B 13/143 (2013.01); A43B 13/148 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A sole for a shoe, said sole extending from a heel region through a midfoot region and a forefoot region to a toe portion and having a sole upper surface and a sole lower surface,
wherein a straight line connecting a position of a rearmost end of said sole upper surface and a position of a tip of said toe portion is designated as a reference line S, said position of said rearmost end of said sole upper surface is designated as the origin O of a coordinate, a path length measured along said sole upper surface from the origin O to said position of said tip of said toe portion is designated as L, an intersection between said sole lower surface and a line extending perpendicularly to said reference line S through a position of 0.45×L along said sole upper surface from the origin O is designated as point C, and another intersection between said sole lower surface and another line extending perpendicularly to said reference line S through a position of 0.60×L along said sole upper surface from the origin O is designated as point D,
wherein a sole posture with said sole in contact with the ground at said points C and D is defined as a sole stable posture,
wherein in said sole stable posture said sole lower surface at said heel portion and said toe portion is separated from the ground,
wherein an inequality, θ≥5 degrees is satisfied in said sole stable posture, in which an angle between the ground and a line connecting a heel central position of 0.15×L from the origin O along said sole upper surface and a metatarsophalangeal joint position of 0.68×L from the origin O along said sole upper surface is designated as θ,
wherein an intersection between said sole lower surface and a line extending perpendicularly to said reference line S through a position of 0.70×L along said sole upper surface from the origin O is designated as point E,
wherein points C and D are disposed at both a lateral side edge portion of said sole lower surface and said medial side edge portion of said sole lower surface, whereas point E is disposed at a medial side edge portion of said sole lower surface, and
wherein a region that extends from point C to point D at said lateral side edge portion of said sole lower surface constitutes a flat-shaped lateral-side stable region, a region that extends from point C through point D to point E at said medial side edge portion of said sole lower surface constitutes a flat-shaped medial-side stable region, and said flat-shaped lateral-side stable region and said flat-shaped medial-side stable region are in contact with the ground in said sole stable posture.