US Patent 7456358 Opening adapter

An adapter having a front face with a flange portion and a centrally located opening. The opening has an inner dimension sized to accept at least a front face of a wiring device and the flange has an outer dimension sized to fit at least within an opening of a front face of a wall plate. The flange portion has a vertical surface contour along a vertical direction of the flange and a horizontal surface contour along a horizontal direction of the flange such that, when the adapter is installed, the contours of the flange result in a smooth transition from the wiring device to the wall plate.