Patent ID: 11857027
Assignee: ATHLETIC PROPULSION LABS LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC A  F | IPC A  F

Claim 0:
1. A device for use in a shoe, the device comprising:
a first foot, a second foot, a third foot, and a fourth foot;
a first flexible leg that extends from the first foot and is curved;
a second flexible leg that extends from the second foot and is curved;
a third flexible leg that extends from the third foot and is curved;
a fourth flexible leg that extends from the fourth foot and is curved;
a first spring extending from a bottom surface of the first foot;
a second spring extending from a bottom surface of the second foot;
a third spring extending from a bottom surface of the third foot; and
a fourth spring extending from a bottom surface of the fourth foot;
wherein the first flexible leg and the third flexible leg are joined together with each other to form a first arch from the first foot to the third foot;
wherein the second flexible leg and the fourth flexible leg are joined together with each other to form a second arch from the second foot to the fourth foot;
wherein the second arch has a center portion that is located under a center portion of the first arch;
wherein the center portion of the first arch and the center portion of the second arch are both higher than a top surface of the first foot, a top surface of the second foot, a top surface of the third foot, and a top surface of the fourth foot;
wherein the first spring has a bottom end for contacting a top surface of an outsole of the shoe;
wherein the second spring has a bottom end for contacting the top surface of the outsole of the shoe;
wherein the third spring has a bottom end for contacting the top surface of the outsole of the shoe;
wherein the fourth spring has a bottom end for contacting the top surface of the outsole of the shoe; and
wherein the bottom end of the first spring, the bottom end of the second spring, the bottom end of the third spring, and the bottom end of the fourth spring are all separate from each other for providing four separate contacts with the top surface of the outsole of the shoe.