Patent attributes
A coupler apparatus for use with concrete segments has a first duct, a first coupler member having a connector and a flexible boot extending therefrom and having an end extending over a surface of said first duct, a second duct, a second coupler member having a connector and a flexible boot extending therefrom and extending over an exterior surface of the second duct, and a gasket received in the connectors of the first and second coupler members for forming a liquid-tight seal between the first and second ducts. Clamps are affixed over the ends of the flexible boot so as to establish a liquid-tight seal with the respective ducts. The connector includes an annular section affixed to an end of the flexible boot and an annular groove formed around this annular section.
