US 12,262,779 B2
Sole for a shoe
Yo Kajiwara, Osaka (JP); and Yohei Yoshida, Osaka (JP)
Assigned to MIZUNO CORPORATION, Osaka (JP)
Filed by MIZUNO Corporation, Osaka (JP)
Filed on Dec. 19, 2022, as Appl. No. 18/083,679.
Claims priority of application No. 2021-212124 (JP), filed on Dec. 27, 2021.
Prior Publication US 2023/0200486 A1, Jun. 29, 2023
Int. Cl. A43B 13/14 (2006.01)
CPC A43B 13/145 (2013.01) [A43B 13/146 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A sole for a shoe, said sole extending from a heel portion to a toe portion and having a sole upper surface and a sole lower surface,
wherein a reference line is set as a straight line to connect a toe-tip position and a rearmost end position of said sole upper surface, said rearmost end position is set to the origin, a path length measured along said sole upper surface from the origin to said toe-tip position is set to L, and an intersection point is set as a point where a line passing a position of (0.45×L) from the origin along said sole upper surface and crossing said reference line at a right angle intersects said sole lower surface at said intersection point;
wherein a sole reference posture is defined as a sole posture in which said sole is in contact with the ground at said intersection point;
wherein said sole lower surface is separated from the ground at the heel portion and the toe portion in said sole reference posture;
wherein when an angle θ is set as an angle between the ground and a straight line connecting a heel central position of (0.15×L) along said sole upper surface from the origin with a metatarsophalangeal joints position of (0.68×L) along said sole upper surface from the origin, said angle θ is greater than or equal to 5 degrees in said sole reference posture;
wherein said position of (0.45×L) from the origin along said sole upper surface is configured and adapted to be disposed in front of an ankle of a wearer of the shoe; and
wherein said sole lower surface has a downwardly convexly curved shape at said intersection point.