US Patent 9829136 Matchcast coupler ring for segmental construction

An article for connecting couplers during formation of matchcast concrete segments with an annular member with an outer surface, a first edge and a second edge opposite the first edge. A first slot formed in the outer surface opens to the first edge and extends angularly inwardly therefrom. A second slot is formed in the outer surface in spaced relation to the first slot and opens to the second edge and extends angularly inwardly therefrom. The first slot has a rectangular portion with a side opening to the first side of the annular member and a groove extending angularly from an opposite side of the rectangular portion. The second slot has a rectangular portion with a side opening to the second side of the annular member and a groove extending angularly from an opposite side of the rectangular portion.