The present invention comprises an intermediate layer for a shoe sole consisting of a hollow shell having convolutions disposed along the periphery thereof. The convolutions are adapted to cushion the foot by compressing when force is applied thereto, and expanding to their original configuration when the force is relieved. An inner filler material may be provided within the shell for added cushioning and resilience.
申请公布号
US5014449(A)
申请公布日期
1991.05.14
申请号
US19890411044
申请日期
1989.09.22
申请人
AVIA GROUP INTERNATIONAL, INC.
发明人
RICHARD, DANIEL;KOLMAN, KENNETH;CASE, CHARLES;BECKER, RONALD;GROSS, ALEX