Patent ID: 9655413
Date: 2017-05-23
CPC Classifications: A44B,F16B,Y10T

Claim:
1. Interlocking attachment surfaces, releasably connectable one to another in a face to face orientation, the attachment surfaces comprising: a first attachment surface comprising a first substrate and a plurality of parallel double-sided post ridges spaced one from the next at a first gap distance, each double-sided post ridge having a height, and comprising parallel first and second ridge side walls supporting a ridge cap having a generally isosceles trapezoid shaped cross-section pointing away from the first substrate, the ridge cap having a base width and a top width; and a second attachment surface comprising a second substrate and a plurality of parallel triplet ridge groups spaced one from the next group at a second gap distance generally equal to the base width of the ridge caps of the first attachment surface, each triplet ridge group comprising parallel first and second outward oriented prong ridges, and a single blocking ridge positioned between and parallel to the prong ridges, each of the prong ridges having a common height generally equal to the height of the double-sided post ridges on the first attachment surface, and each blocking ridge having a height equal to or less than the prong ridges; wherein when the first and second attachment surfaces are connected together, the ridge cap of each double-sided ridge post is inserted into the second gap between two triplet ridge groups and is prevented from being inserted between the prong ridges of an individual triplet ridge group by the blocking ridge.