Patent ID: 9572395
Date: 2017-02-21
CPC Classifications: A41D,A43B,A43C

Claim:
1. Footwear comprising: (a) a footwear body; (b) a rotatable collar yoke capable of rotating in the sagital plane in dorsi flexion and plantar flexion relative to the footwear body; (c) a detachable yoke extension rotatably attached to the collar yoke, the yoke extension comprising at least one tension adjusting mechanism, a connector, an elastic member, a fastener, and a yoke extension leg extending into the collar yoke; wherein said yoke extension harvests energy while a user is dorsiflexing their foot prior to heal lift and transmits the harvested energy into the footwear body; and wherein the yoke extension is capable of transmitting pivotal forces through the yoke extension leg into the collar yoke and the footwear body and transmitting tension forces through the tension adjusting mechanism, connector, elastic member and fastener into the footwear body.